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AXIS HOUSE
Supplier and manufacturer of Reagents to the Mining Industry
Axis House understands and supports the national lockdown of South Africa
to fight the spread of Covid-19.
We are fully operational.![]()
Axis House are the front runners when it comes to the development, supply and distribution of specialised formulations of cutting-edge metallurgical processes and products, tailored exclusively for the mining industry, not just within Africa, but on a global scale.
We are driven by our commitment to maximise yield and efficiency and with a fully equipped laboratory, as well as stringent monitoring of global chemical markets, we are able to combine the collective knowledge of our experts in milling, flotation, sedimentation, leaching and analytics with world class equipment to leverage our expertise, fully addressing our client’s needs.
We know that remaining progressively innovative goes far beyond specialised product development and that is why we always strive to create financial value for each and every one of our clients.
Pioneering
Born from the need to produce a technological breakthrough for mining operations, specifically focused on production processes within central Africa, Axis house were the pioneers in establishing a necessary distribution model, that was both financially sound and lead-time orientated, enabling substantial changes to be made in how African mining operations approach all facets of the production process.
Innovation
Because we believe that progressive innovation is key, Axis House have been adapting to an ever-changing mining landscape for close to 20 years. Constant re-assessment and re-invention means that our quest for unique and cost-effective solutions is unwavering when it comes to research and development, as well as the supply of cutting-edge metallurgical processes and products, tailored exclusively for the mining industry - no longer just within Africa, but on a global scale.
Quality
Our strength lies in our heritage of social responsibility, deep insights into our client’s needs, technical distinction and a focused ethos of quality products, committed people and nothing less than service excellence.
Expertise
With a fully equipped laboratory, as well as stringent monitoring of global chemical markets, we are able to combine the collective knowledge of our experts in milling, flotation, sedimentation, leaching and analytics with world class equipment to leverage our expertise, fully addressing our client’s needs.
We inherently believe that operational excellence can only be achieved through continuous and progressive innovation.
Our Services.
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01
Mining and Chemical Manufacture
Flotation Collectors:
OXIDE FLOTATION: Axis House supply and produce a range of collectors tailored made for the flotation of oxide minerals.
REO FLOTATION: With a pioneering approach to Rare Earth Oxides (ROE), Axis House has developed specific reagents for the separation of ROE into mixed concentrates.
BASE METAL SULPHIDE FLOTATION: Axis House supply a range of selective sulphide collectors for the flotation of Cu, Pb, Zn, Ni and Mo.
INDUSTRIAL MINERALS: Axis House has extended our technology to effectively treat Industrial Minerals.
PGM: A dedicated PGM range has been developed to effectively recover PGM minerals in sulphide, base metal associated and alloy form.Depressants:
The Revadep Range of depressants has been established to depress the specific gangue minerals present in the various ores such as talc, carbon, clays, silica and carbonates.Frothers:
Customised frother formulations of Axis House’s HydrofrothTM range are developed for each operation to ensure good selectivity, stability and mobility.
- Hydrometallurgy
- Leaching, solvent extraction, electrowinning and precipitation
- Sulphidisation reagents
- Hydroxamate oxide collectors
- Flocculant -
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Metallurgical Laboratory
We believe in using science to create solutions, which is why Research and Development underpins all that we do.
We are proud to own and operate:
- A fully functional Flotation laboratory in Cape Town, South Africa.
- A metallurgical Laboratory in Sydney, Australia.
- A research and development laboratory in Melbourne, Australia.
The metallurgical laboratory covers research and development work in flotation, precipitation, electrowinning and flocculation. -
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Practical Application Technology / Reagent Suite Development
- Developing cutting edge reagent solutions can be as complex as those ore bodies themselves, which is why we follow a practical application technical strategy.
- A complimentary suite selection and optimisation service is available for all clients, specifically those interested in the Axis House developed technology of combining fatty acids, hydroxamates and sulphidisation suites to effectively and economically float oxide minerals.
- The solution is to develop suites of reagents which will function synergistically and can optimise both the use of the Client’s processing equipment and the selective collecting power of the reagent.
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04
Research and Development
Axis House’s research and development focuses on the cost-effective processing of the valuable minerals. This includes the effective and selective recovery of the valuable metals by introducing reagents that reduces the overall processing cost per ton of ore treated. Customer specific problems are addressed during very specific projects as well as longer term industry problems to ensure that Axis House remains competitive in the market with novel reagent technologies.
Our Products.
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Copper
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Copper:
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Frothers
HydrofrothTM Range
Optimal froth conditions are created by effectively controlling the laminar layer development and allowing for proper gangue drainage. Combined with improved water rejection ability that promotes final concentrate grade improvements, the HydrofrothTM range also speeds up kinetics whilst maintaining froth mobility.
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Flocculants
Brontë Range
Polyacrylamides with a range of different charge strengths and molecular weight, improve the settling rate at various solid and liquid separation stages in mineral processing – such as thickening of flotation concentrates, recovery of pregnant leach liquors and dewatering of tailings.
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Smoothing Agent
ALC7G
ALC7G Smoothing Agent is a mixture of modified polymers. It’s use in SX/EW results in quality improvements in ordered structure and smoothness of the cathodes when compared to other products. It is water soluble at room temperature which results in less fish-eyes and no loss of reagent. Due to high solubility the prepared solutions are less viscous with better dispersion in the electrolyte. The high solubility also reduce line blockage and pump maintenance.
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Collectors
TLQ2
A specialised oil-based liquid collector which offers improved selectivity of valuable sulphide minerals over xanthates. Effective in increasing the flotation kinetics and grade of chalcopyrite/chalcocite compared to xanthates. Low dosage required and does not break down under low alkaline conditions.
TLQ2-DX
A formulated liquid sulphide collector targeting chalcopyrite in ores that contain high levels of pyrite as a contaminant. Based on the selective nature of TLQ2 towards copper, the TLQ2-DX further enhances the selectivity. Through rejection of pyrite in the roughing stage, build up is not experienced in the cleaner circuit. Typically works at very low doses while improving flotation kinetics as well as concentrate grade.
DLQ2
A liquid sulphide collector that can be used as a complete replacement or as a secondary collector with xanthates. Selective towards base metal sulphides, as well as sulphides containing gold. Lower dosage required compared to xanthates.
DLQ5
A liquid collector designed for the differential flotation of Cu/Pb/Zn circuits. DLQ5 collects copper and lead whilst allowing for effective rejection of zinc. The rejection can be further enhanced with the use of a depressant.
MLQ1
A water-soluble collector used for copper ores containing sulphide and oxide minerals. Collecting power compares to PAX, however more selective. Also effective in collecting gold sulphides.
AM810
A liquid C8/C10 hydroxamate designed for the flotation of oxidized base metals. Forms a complex through chelation therefore a wider range of oxide minerals can be floated. Works best as a secondary collector after sulphidising with NaHS/Na2S.
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Depressants
Revadep CM3
A metallurgical grade CMC used to depress Talc by rendering the surface of the gangue hydrophilic.
Revadep 5050
Disperses fine material and depresses siliceous gangue such as quartz, mica, calcite and alumina-silicate.
Revadep Cu++
A strong dispersant which alters the charge of fine gangue material, thereby repelling each other. This reduces pulp viscosity which allows for better froth drainage, resulting in an increase in the concentrate grade. Effective in the rejection of carbon.
Revadep RB
A natural polyphenol designed to disperse and depress clay gangue found in sulphide-bearing base metal ores. Very effective in improving concentrate grade. Dissolves easily in water.
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Cobalt
Specialised Products for COBALT
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The Axis House flotation reagent range for Cobalt consists of collectors for oxide and sulphide Cobalt, depressants for typical associated gangue minerals as well as specialised frothers. The reagent range also covers the hydrometallurgical process with high purity Magnesium Oxide products.
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Flotation
Cobalt Oxide Collectors:
The most common form of Cobalt oxide minerals are Heterogenite (CoOOH) and Spherocobaltite (CoCO3). These minerals typically occur with oxide copper minerals such as Malachite, Azurite and Chrysocolla. The Axis House range of reagents includes sulphidising agents, Cobalt oxide collectors, thiol collectors and frothers.
Rinkalore 840: A high alkyl chain length Hydroxamate collector for the flotation of oxide Cobalt minerals in rougher and scavenger application. Applied in conjunction with sulphidising agents to further improve the recovery of Cobalt oxide minerals.
Rinkalore 10: An oleochemical specifically formulated to increase recovery of slow floating oxide minerals such as Heterogenite. It is typically dosed as a mixture with diesel as well as in combination with Rinkalore 840 to improve the efficiency.
AM810: A C8-C10 alkyl hydroxamate, developed to float metal oxides (Cu and Co). It is typically applied with sulphidisation reagents to further improve the oxide recovery.
Cobalt Sulphide Collectors:
These Axis House sulphide collectors are dosed to improve the cobalt sulphide recovery. Collectors can be applied as primary or secondary collectors where xanthates are used. Typical Cobalt sulphide minerals targeted with these collectors are Carrollite (Cu(Co,Ni)2S4) and Cobaltite (CoAsS)
DLQ2: A water soluble liquid sulphide collector that can be used as a primary or secondary collector to improve Cobalt sulphide recovery.
DLQ5: A water soluble liquid sulphide collector that can be used as a primary or secondary collector to improve Cobalt sulphide recovery.
TLQ2-DX: Liquid sulphide collector blend with lower solubility. Typically dosed to the grinding circuit or conditioners with adequate conditioning time.
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Depressants
The most common gangue associated in Cu-Co oxide ores are silica, clay and carbonate minerals. The Axis House range of gangue depressants have dispersing and depressing properties to effectively reduce the gangue recovery, increases metal grade and reduces the pulp viscosity.
Revadep 5050: A water soluble powder, that is easy to prepare as solution and dose. Developed for the depression/Dispersion of gangue minerals like quartz, mica and calcite.
Revadep RB: A mixture of natural polyphenols to effectively disperse and depress clay minerals. It is water soluble and renders floatable gangue hydrophilic, thus improving concentrate grade.
Revadep Cu++: A water soluble powder with strong ability to reduce pulp viscosity and alter the charge of fine gangue material by improving froth drainage and improves concentrate grade.
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Frothers
Hydrofroth range of alcohol, glycol and oil based frothers. Frother blends are customised for specific operations to ensure that frother selectivity, stability and mobility is at an optimum.
HydroFroth: Customised frother for the application throughout the circuit.
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Sulphidising Agents
Sulphidising agents are applied during oxide mineral flotation so that thiol collectors such as xanthate can be applied to recovery oxide Cobalt and Copper. Controlled Potential Sulphidisation (CPS) is the preferred application of these reagents, although slug dosage is also commonly used. Ammonium sulphate, sulphidising promotor, also assist with improved adsorption of Sulphide ions during sulphidisation.
Sodium Hydrogen Sulphide - NaHS
Sodium Sulphide - Na2S
Ammonium Sulphide -(NH4)2S
Ammonium Sulphide -(NH4)2SO4(promotor)
- Cobalt Precipitation
MagChem 40: MagChem 40 AH: A high purity, light burned magnesium oxide produced from magnesium-rich brine and dolomitic lime. This fine white powder has a very high reactivity index and a low bulk density. USES: MagChem 40 AH is well suited for metal recovery processes from mining operations such as cobalt, nickel, and copper. Its high purity and high reactivity provide effective metal precipitation with optimum metal recovery.
Properties:
Magnesium Oxide (MgO), % ignited basis 98.2 - 97.0min
Calcium Oxide (CaO), % 0.8 - 1.0max
Silicon Oxide (SiO2), % 0.35 - 0.5max
Iron Oxide (Fe2O3), % 0.15 - 0.3max
Aluminum Oxide (Al2O3), % 0.10 - 0.2max
Chloride (Cl), % 0.30 - 0.5max
Sulfate (SO3), % 0.05 - 0.03max
Loss on Ignition, % 2.3 - 3.0max
- Cobalt Precipitation
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Gold
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Gold
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Frothers
HydrofrothTM Range
Optimal froth conditions are created by effectively controlling the laminar layer development and allowing for proper gangue drainage. Combined with improved water rejection ability that promotes final concentrate grade improvements, the HydrofrothTM range also speeds up kinetics whilst maintaining froth mobility.
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Flocculants
Brontë Range
Polyacrylamides with a range of different charge strengths and molecular weight, improve the settling rate at various solid and liquid separation stages in mineral processing – such as thickening of flotation concentrates, recovery of pregnant leach liquors and dewatering of tailings.
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Collectors
DGQ4
This has shown an increase in recovery of fine particles (< 25μm) and this is attributed to its effect on the behaviour of the froth phase. When used in dual-collector reagent suites with xanthates, the recovery of free gold and gold-bearing sulphides is markedly improved. As the silver content of the gold surface increases, DGQ4 adsorption increases dramatically. Research has concluded that the addition of DGQ4 results in a more stable froth phase in addition to the synergistic interactions between the reagent and primary xanthate collector - hence the improved floatation performance.
MGQ2
MGQ2 adsorption occurs on pure gold surfaces as both monomeric and dimeric species. MGQ2 has a higher affinity for gold particles with low silver content, thus using the collector in low silver grade ore results in improved recoveries. It is an alternative to the conventional xanthate collectors and requires lower dosages to obtain high recoveries in sulphide-mineral flotation.
TGQ4
The collector by having both a short chained and a branched alkyl group renders the minerals’ surfaces hydrophobic at a faster rate than most collectors resulting in improvrd flotation performance when blended with other collectors. The liquid nature of the oily product improves the shelf life significantly, as well as adding to the ease of dosing, as no additional make-up is required.
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Depressants
Revadep CLA-D
Ore constituents such as clay-forming minerals and hydrated iron oxides can hinder the attachment of free gold onto the bubble surface. The hindrance of the free gold attachment to the bubble is more pronounced in the fine size classes with the slimes coating, otherwise floatable minerals. Revadep CLA-D in small amounts can act as a dispersant having a positive impact on both the flotation rate and overall gold recovery.
- Commodities
pH modifiers(Soda Ash, Hydrated Lime, Quick Lime, Caustic Soda)
Lead Nitrate
Activated Carbon
Hydrochloric Acid
Silica
Borax
Soda Ash
SMBS or Hydrogen
Peroxide (depending on cyanide detox process)
Copper Sulphate
- Commodities
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PGM
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PGM
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Frothers
HydrofrothTM Range
Optimal froth conditions are created by effectively controlling the laminar layer development and allowing for proper gangue drainage. Combined with improved water rejection ability that promotes final concentrate grade improvements, the HydrofrothTM range also speeds up kinetics whilst maintaining froth mobility.
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Flocculants
Brontë Range
Polyacrylamides with a range of different charge strengths and molecular weight, improve the settling rate at various solid and liquid separation stages in mineral processing – such as thickening of flotation concentrates, recovery of pregnant leach liquors and dewatering of tailings.
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Collectors
TPG4
A neutral oily specialised liquid sulphide collector that can be used as a complete replacement for xanthate collectors. The collector is both a short chained and a branched alkyl group, rendering the minerals’ surfaces hydrophobic at a faster rate than the xanthate collectors. This is very beneficial when dealing with non-sulphide PGMs, such as tellurides and arsenides that have slow flotation kinetics. Benefits are: improved grades, rejection of iron-impurities and very low doses.
DPG4
A liquid sulphide collector that can be used as a complete replacement or as a secondary collector with xanthates. The minimum interaction between the DPG4 collector and mineral surface is sufficient to impart hydrophobicity to the mineral surface. The residual DPG4 collector molecules aggregates onto the bubble-particle interphase. This process stabilises the agglomerate, resulting in higher concentrate grades. When DPG4 is used as a secondary collector, the collector adsorbs on strong sites and the xanthate adsorbs on the remaining weaker sites on the sulphide mineral surface. This results in a greater surface coverage, thereby enhancing the adsorption of xanthate onto sulphide minerals and improving the PGM recovery.
DPG6
In an alkaline circuit, flotation reagent is more selective against iron sulphides and displays weak collective power towards pyrite. In relation to the PGM industry, a key characteristic of the collectors is its fast kinetics contribution which is key when dealing with the slow floating minerals. The liquid nature of the product significantly improves the shelf life and adds to the ease of dosing as no additional make-up is required.
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Depressants
Revadep Tal-D
Talc is a naturally floating gangue mineral found in PGM ores and has a hydrophobic nature that increases with milling intensity. As a result, talc is a major concern for PGM producers who are mandated with fine grind milling. Revadep Tal-D adsorbs onto the talc surface, making the surface hydrophilic, thus reporting to the tailings and improving the grade of the concentrate.
Revadep Sil-D
Fine grinding associated with PGM beneficiation often results in formation of slimes that coat the mineral particles, retarding collector adsorption. Silicates are a common contaminant of PGM concentrate. Silicates are efficiently depressed using Revadep Sil-D. The product utilises the ability to completely bond with activating cations in a chelating fashion, thus depressing the targeted gangue minerals, while also dispersing fine clay-like particles. This allows the clean mineral surface to interact with the collector.
Revadep Pt+
Fine grinding associated with PGM beneficiation often results in formation of slimes that coat the mineral particles, retarding collector adsorption. Silicates are a common contaminant of PGM concentrate. Silicates are efficiently depressed using Revadep Sil-D. The product utilises the ability to completely bond with activating cations in a chelating fashion, thus depressing the targeted gangue minerals, while also dispersing fine clay-like particles. This allows the clean mineral surface to interact with the collector.
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Commodities
Xanthates
Guar
Copper Sulphate
Lime
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Phosphate
Specialised Products for PHOSPHATE
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Phosphate Processing
The Axis House phosphate product range includes reagents for the beneficiation of phosphate rock through to production of phosphoric acid. These include; our specialised collectors for both direct and reverse flotation, depressants, frothers, heavy metal removal agent and defoaming agents for phosphoric acid production.
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Flotation
Common gangue minerals which forms part of the typical mineralogy of phosphate ores requires the selective flotation of phosphate minerals (apatite, monazite, etc). Depending on the type or concentration of the gangue minerals present, anionic or cationic collectors are applied during the flotation upgrade process.
In general, phosphate ore is processed by flotation to reduce the content of the gangue minerals, which typically consists of quartz, feldspar, mica, calcite, dolomite, etc. The Axis House phosphate reagent range can be successfully applied to efficiently separate phosphate and gangue mineral during the flotation process.Direct Flotation
Collectors: Axis House Rinkalore range are selective anionic collectors applied in the direct flotation of phosphate minerals. Collectors are typically applied at basic pH and can be applied with or without fuel oil such as diesel.
Reagent Type: Anionic collector
Product Line: Rinkalore Series
Application: Direct phosphate flotation Reverse carbonate flotation
Oxide flotation
Reverse Flotation
The concentration of phosphate ores through the reverse flotation of silicate, dolomitic and calcitic minerals are achieved by applying the Axis House cationic collector range.
Reagent Type: Cationic collector
Product Line: Rinkalore D-19 Series
Application: Reverse flotation of silicates, Carbonates oxide mineral flotation
Benefits
• Maximised grade recovery
• Optimise collector application
• Improved selectivity against unwanted minerals -
Frothers
HydroFrothTM range of alcohol, glycol and oil based frothers. Frother blends are customised for specific operations to ensure that frother selectivity, stability and mobility is at an optimum.
Product Line: HydroFrothTM
Application: Rougher/Cleaner flotation All mineral types
Benefits:
• Improved selectivity
• Stability and mobility
• Reduced dosage
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Flocculants
The Brontë range includes non-ionic, anionic and cationic polymeric flocculants as well as coagulants. Flocculant selection is done by detailed on-site testing to ensure the appropriate flocculant is applied to achieve improved underflow densities and clear overflows.
Product Line: Brontë
Application: Solid liquid separation density improvement
Benefits:
• Improvement of water/acid recycling
• More efficient control of slurry densities
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Depressant Range
In direct flotation of phosphate minerals, depressants are applied to reduce the recovery of unwanted gangue minerals such as calcite, silicates and clays. The Axis House range of depressants for phosphate ores are selected through detailed test work and by mineralogy.
Product Line: Revadep
Application: Depression of silicates, clays, carbonates. Depression of all phosphate associated gangue minerals
Benefits:
• Selective depression
• Improved grade
• More efficient dosing- Decadmiation
Efficient decadmiation by precipitation is possible with Axis House cadmium removal reagents. Cadmium removal with Axis House organic reagents are more efficient and lower operating and capital costs compared to ion exchange, crystallisation and calcination.
Product Line: Cadd
Application: Cadmium removal from phosphate products
Benefits:
• Efficient Cd removal during phosphoric acid production
• Lower operating costs compared to other methods- Defoamers
Efficient decadmiation by precipitation is possible with Axis House cadmium removal reagents. Cadmium removal with Axis House organic reagents are more efficient and lower operating and capital costs compared to ion exchange, crystallisation and calcination.
Product Line: FoamAx
Application: Foam reduction in phosphoric acid process
Benefits:
• Improved phosphate leach efficiency
• Improved phosphoric acid production - Decadmiation
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Polymetallic
Specialised Products for POLYMETALLIC ORE
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The Poly range of collectors are specifically formulated for the differential flotation of polymetallic minerals in Copper-Lead- Zinc ores. The collectors are selective towards minerals like Chalcopyrite (CuFeS Galena (PbS) and Sphalerite (Zn,Fe)S in the respective circuits during differential flotation. Although xanthates with various chain lengths are commonly used for the selective flotation of Chalcopyrite, Galena and Sphalerite, specialised collectors can enhance the selective recovery of the minerals. Conventional polymetallic flotation involves the flotation of Cu at pH 6-7, Pb at pH 8-9 and Zn at alkaline pH 10-11 and the PolyQ range are applicable to these flotation conditions. During the selection process of an applicable collector, the ore mineralogy, circuit conditions and total reagent suite (depressants, activators and frothers) play an important role in selecting the most efficient collector. Collector type and dosage can be selected through laboratory batch flotation tests and Axis House technical representatives are able to advise on the application and selection of the appropriate collector.
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PolyQ Cu Collectors
The selective Cu collectors can be applied as alternatives to xanthates and are effective at significantly lower dosage (30% of xanthate dosage). These collectors perform over a wide pH range and can be applied in conjunction with sulphide/non-sulphide gangue depressants that are dosed in the Cu circuit.
PolyQ-472
PolyQ -402
PolyQ -305
PolyQ -DX -
PolyQ Pb Collectors
The Pb collectors are applied in Pb-Zn circuits or Cu-Pb-Zn circuits after the Cu flotation stage. Compared to low to medium chain length xanthates, it is very selective over Zn minerals and targets Pb sulphide minerals in the presence of typical sulphide depressants like ZnSO4 and Cyanide. PolyQ Pb collectors are effective over a pH range and can be applied to most Pb-Zn flotation circuits. The Pb collectors are also effective in recovering any associated silver minerals that are common in some galena ores.
PolyQ -2
PolyQ -5
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PolyQ Zn Collectors
The Zn sulphide collector range is aimed at maximising the Zn recovery while maintaining selectivity against sulphide gangue like pyrite. The collectors are typically applied after the reactivation of Sphalerite with CuSO4 and at elevated pH levels. Compared to medium to high chain length xanthates, these collectors are dosed at 30% to 50% of the xanthate dosage.
PolyQ -DX
PolyQ -305
PolyQ -402
PolyQ -167
PolyQ -173
Johannesburg
Justine Stubbs - Managing Director
Suite 21, Katherine & West
3rd Floor, 114 West Street
Sandown, Sandton
Tel: +27 11 463 4888
Email: info@axishouse.co.za
Marketing Related Queries
For information relating to our CSR programme please contact marketing.
Tel: +27 11 463 4888
Email: kiml@axishouse.co.za
Cape Town
The Board Walk
Cnr Oxford and Victoria Ave
Hout Bay
Tel: + 27 21 790 0481
Email: info@axishouse.co.za
Turkey
Axis House Liaison Office
Ahmet Teoman
Kocadere Cad, No: 64/10
Urla 35430 Izmir, Turkey
Tel: +90 530 966 6892
Email: ahmett@axishouse.co.za
Axis House understands and supports the national lockdown
of South Africa to fight the spread of Covid-19.
We are however still fully operational with our teams working remotely.
The port authorities and borders fall under essential services, and your orders and deliveries will continue to take place until such time as government policies change.
The sales team will continue to give you updated prices and information The logistics team will deliver and track your products The technical team is available to answer any queries around product application and formulation.
Our out of country Metallurgists are available for on-site visits and assessments where legally allowed.