Zenith Abra-Super Rubber sheets use premium natural rubber for abrasion, impact and corrosion resistance. The Abra-Super range provides unmatched wear performance in the toughest abrasion environments. Pure natural rubber is an outstanding abrasion resistant material, particularly for handling slurries. The inherent properties of strength, resilience and cut resistance have a direct effect on wear performance. Features Premium Resistance to abrasion with excellent tensile strength and high elasticity. Applications Lining of slurry chutes, pipes, tanks, cyclones, foat cells, launders, and storage bins. Finish Type Both side smooth, both side fabric and buffed finish, One side smooth other side fabric or buffed finish. Standard Thickness 1 mm to 40 mm Standard Length 10 Mtr, 33 Ft, 11 Yard Standard Width 1.2 / 1.4 / 1.5 Mtr, 48" / 54" / 60" inches Technical Specification Code Specific Gravity Hardness (+/- 5) Tensile Strength Elongation Abrasion Temperature Gm/cm3 Shore A Kg/cm2 % mm3 C STANDARD ASTM D297 ASTM D2240 ASTM D412 ASTM D412 ASTM D5963 -- Abrasuper 40 0.98 38 240 810 120 -30 to +70 Abrasuper 60 1.10 60 200 500 110 -30 to +70 ABRA R 60 1.10 60 270 700 110 -40 to +75 ABRA HDR 1.15 70 225 600 110 -40 to +75 >Custom width and length is available on request >Custom colours available on request
Zenith Abra-Super Rubber sheets use premium natural rubber for abrasion, impact and corrosion resistance. The Abra-Super range provides unmatched wear performance in the toughest abrasion environments. Pure natural rubber is an outstanding abrasion resistant material, particularly for handling slurries. The inherent properties of strength, resilience and cut resistance have a direct effect on wear performance. Features Premium Resistance to abrasion with excellent tensile strength and high elasticity. Applications Lining of slurry chutes, pipes, tanks, cyclones, foat cells, launders, and storage bins. Finish Type Both side smooth, both side fabric and buffed finish, One side smooth other side fabric or buffed finish. Standard Thickness 1 mm to 40 mm Standard Length 10 Mtr, 33 Ft, 11 Yard Standard Width 1.2 / 1.4 / 1.5 Mtr, 48" / 54" / 60" inches Technical Specification Code Specific Gravity Hardness (+/- 5) Tensile Strength Elongation Abrasion Temperature Gm/cm3 Shore A Kg/cm2 % mm3 C STANDARD ASTM D297 ASTM D2240 ASTM D412 ASTM D412 ASTM D5963 -- Abrasuper 40 0.98 38 240 810 120 -30 to +70 Abrasuper 60 1.10 60 200 500 110 -30 to +70 ABRA R 60 1.10 60 270 700 110 -40 to +75 ABRA HDR 1.15 70 225 600 110 -40 to +75 >Custom width and length is available on request >Custom colours available on request
Zenith Abra-Super Rubber sheets use premium natural rubber for abrasion, impact and corrosion resistance. The Abra-Super range provides unmatched wear performance in the toughest abrasion environments. Pure natural rubber is an outstanding abrasion resistant material, particularly for handling slurries. The inherent properties of strength, resilience and cut resistance have a direct effect on wear performance. Features Premium Resistance to abrasion with excellent tensile strength and high elasticity. Applications Lining of slurry chutes, pipes, tanks, cyclones, foat cells, launders, and storage bins. Finish Type Both side smooth, both side fabric and buffed finish, One side smooth other side fabric or buffed finish. Standard Thickness 1 mm to 40 mm Standard Length 10 Mtr, 33 Ft, 11 Yard Standard Width 1.2 / 1.4 / 1.5 Mtr, 48" / 54" / 60" inches Technical Specification Code Specific Gravity Hardness (+/- 5) Tensile Strength Elongation Abrasion Temperature Gm/cm3 Shore A Kg/cm2 % mm3 C STANDARD ASTM D297 ASTM D2240 ASTM D412 ASTM D412 ASTM D5963 -- Abrasuper 40 0.98 38 240 810 120 -30 to +70 Abrasuper 60 1.10 60 200 500 110 -30 to +70 ABRA R 60 1.10 60 270 700 110 -40 to +75 ABRA HDR 1.15 70 225 600 110 -40 to +75 >Custom width and length is available on request >Custom colours available on request
High Tensile Reclaim Rubber with 8Mpa is a high-quality rubber material that offers several benefits. Here are some details and benefits of this product: 1. *Details of High Tensile Reclaim Rubber 8Mpa:* - Tensile Strength: 8Mpa - Material: Reclaimed rubber - Type: High tensile - Application: Various industrial and commercial uses where high tensile strength is required 2. *Benefits of High Tensile Reclaim Rubber 8Mpa:* - *Cost-effective:* Reclaim rubber is often more cost-effective than virgin rubber, making it a budget-friendly option for various applications. - *Environmentally friendly:* Reclaim rubber is made from recycled materials, making it an eco-friendly choice that helps reduce waste. - *High tensile strength:* With a tensile strength of 8Mpa, this product offers durability and resistance to wear and tear, making it suitable for applications requiring such properties. - *Versatile use:* High tensile reclaim rubber can be used in various industries, including automotive, construction, and manufacturing, where high tensile strength is essential. Overall, High Tensile Reclaim Rubber 8Mpa is a versatile, cost-effective, and environmentally friendly option with the required strength for various industrial and commercial applications. What is Reclaimed Rubber - Reclaimed rubber is a type of rubber obtained by recycling old or waste rubber products, such as tires. Through a devulcanization process, the cross-linked rubber molecules are converted back into a pliable state, allowing the material to be reprocessed and remolded into new products. This process not only helps in reducing waste but also conserves resources since the demand for new, raw rubber is reduced. Reclaimed rubber typically appears black or very dark in color and has a texture that can vary depending on the source material and the extent of processing. It's used in various applications, including the manufacturing of automotive parts, rubber mats, and as an additive to improve the properties of new rubber products.
Major Types of Natural Rubber 1. Hevea Rubber (Hevea Brasiliensis) - The primary raw material for natural rubber comes from the Hevea tree (Hevea Brasiliensis), mainly cultivated in Southeast Asia, particularly in Thailand. 2. Sumatra Rubber - Rubber is also produced in Sumatra, Indonesia, serving as another globally significant production region. Natural Rubber Supply Chain Process: 1. Cultivation and Harvesting: 2. Processing and Production: 3. Domestic and International Trade: 4. Product Manufacturing: Applications of Natural Rubber 1. Automobile Tires: - Natural rubber is a key raw material for the manufacturing of automobile tires due to its excellent wear resistance and elasticity. 2. Shoe Soles: - Widely used in the production of shoe soles, providing cushioning and durability during walking. 3. Industrial Products: - Utilized in a variety of industrial products, serving as vibration control materials and sealing materials. 4. Medical Devices: - Used in the production of medical gloves and some medical devices due to its flexibility and biocompatibility. Applications of RSS (Rubber Smoked Sheet) and TSR (Technically Specified Rubber): 1. RSS (Rubber Smoked Sheet): - Automobile Tire Manufacturing: - RSS is extensively used in the production of high-end automobile tires due to its excellent physical properties and quality, making it a reliable material for tires that require high wear resistance and durability. - High-Quality Products: - Additionally, RSS is employed in the manufacturing of other high-quality rubber products, including industrial goods, luxury consumer goods, and some medical devices. 2. TSR (Technically Specified Rubber): - Automobile Parts Manufacturing: - TSR products are widely used in the manufacturing of automobile parts. In components requiring vibration control, such as engine mounts and bushings, TSR is selected for its specific properties. - Industrial Applications: - Used in the manufacturing of industrial products, TSR is an ideal material for products where the flexibility and elasticity of rubber are essential. - Medical Devices: - TSR is also used in some medical devices, playing a crucial role in the production of medical products due to its biocompatibility.
Dolomite mineral is a double carbonate of calcium and magnesium and it exhibits a granular structure. It has high natural whiteness and it's noted for their ease of dispersion. Its use improves properties such as weather ability, reduces shrinkage, fissure development and water absorption. Natural Dolomite Powder is of White Colour and is used as Filler in many applications such as Soap & Detergent, Paints, Ceramics and many other Industries. Applications: - Soap & Detergent Leather Cloth Industry Cable Industries Rigid PVC Pipes Iron, Steel, and Ferro-Alloys Industries Paints, Inks, Powder Coating Ceramic Industry Rubber Industry Glass Industry Available Mesh Size: - 100 TO 700 MESH Custom sizes and Material of required specifications can be made in case of Bulk and Regular orders. BRIGHTNESS: - 92 TO 96 AS PER REQUIREMENT Index Compound Result 1. Silica - (SiO2) 10.41 % 2. Alumina - (AI2O3) 01.15 % 3. Iron - (Fe2O3) 00.21 % 4. Titanium - (TiO2) 00.18 % 5. Calcium - (Cao) 30.02 % 6. Magnesium - (MgO) 18.41 % 7. Soda - (Na2O) 00.34 % 8. Potash - (K2O) 00.07 % 9. Loss on Ignition - (LOI) 38.91 %
KOHS CERAMICS, which is a professional manufacturer of advanced ceramics with 19 years of R&D experience.we can custom various textile ceramics,alumina ceramic tubes,crucible and so on.If you are interested pls contact
Introduction: - Feldspar is primarily used in industrial applications for its alumina and alkali content. Feldspar is a naturally occurring anhydrous, inorganic, igneous rock. The fusibility of the mineral makes it useful raw material for many applications and the purity is the indication of better fusibility in the application. There are two types of it depending On Na2O and K2O SODA FELDSPAR POTASH FELDSPAR Applications: - CERAMICS ENAMEL FRITZ & GLAZED INSULATORS GLASS MILD ABRASIVES PICTURE TUBES SANITARYWARE TABLEWARE VITRIFIED TILES WELDING ELECTRODE Available Mesh Size: - 100 - 500 MESH Custom sizes and Material of required specifications can be made in case of Bulk and Regular orders. TYPICAL CHEMICAL COMPOSITION OF POTASH FELDSPAR Index ompound Unit Result 1. Silica - (SiO2) % 66 - 68 2. Alumina - (AI2O3) % 17 - 18 3. Iron - (Fe2O3) % 0.03 - 0.06 4. Titanium - (TiO2) % 0.03 - 0.06 5. Calcium - (Cao) % 00.00 6. Magnesium - (MgO) % 00.00 7. Soda - (Na2O) % 2 - 3 8. Potash - (K2O) % 10 - 12 9. Loss on Ignition - (LOI) % 0.10 - 0.20 TYPICAL CHEMICAL COMPOSITION OF SODA FELDSPAR Index Compound Unit Result 1. Silica - (SiO2) % 68 - 72 2. Alumina - (AI2O3) % 17 - 18 3. Iron - (Fe2O3) % 0.10 - 0.15 4. Titanium - (TiO2) % 0.03 - 0.06 5. Calcium - (Cao) % 0.05 - 0.20 6. Magnesium - (MgO) % 0.10 - 0.15 7.Soda - (Na2O) % 9 - 10 8. Potash - (K2O) % 0.50 - 0.20 9. Loss on Ignition - (LOI) % 0.10 - 0.20
Size: 300*300*8mm,515*515*8mm,300*300*10mm,500*500*63mm,390*190*25mm, 495*435*30mm 146*300*32mm, 240*240*32mm etc. The wear-resistant ceramic plate is special corundum ceramic with AL2O3 as the main raw material, rare metal oxide as the flux, and a high-temperature roasting of 1,700 Baidu. Therefore, the wear-resistant ceramic plate has the characteristics of high-temperature resistance, acid and alkali corrosion resistance, and good wear resistance. It is widely used for anti-wear of mechanical equipment and is also widely used for anti-wear of steel pipes, power plants, chemical industry, cement building materials industry and other systems. The following is a detailed introduction to the application of wear-resistant ceramic plates in steel mills: Raw material feeding system: belt head hopper, belt head hopper, trolley tee bucket, and feed hopper. Batching system: mixing silo, primary mixing cylinder, secondary mixing cylinder, mixing disc, pelletizing disc. Sintering material conveying system: beneficiation hopper under the vibrating screen, long-distance beneficiation hopper, silo. Dust removal and ash discharge system: dust removal pipe, elbow, tee, dust falling pipe, and tail dust removal pipe. Coking system: coke hopper. Iron-spraying coal injection system, medium speed mill: cone bucket, separation baffle, outlet pipe, pulverized coal pipe, and burner cone. Steel ball mill: outlet pipe, coarse powder separator, fine powder separator, coal powder pipe, elbow, inner shell of powder discharge machine. Steel rolling workshop: slag flushing pipeline.
Product description: Also named wear cermaic parts, wear rubber ceramic plate, wear resistant ceramic pads. Ceramic rubber composite pads&plate is use of rubber vulcanization process, to embed the wear-resistant ceramic vulcanized into rubber, stick it on the inner all of equipment with the adhesice paste.As customers' requirment, it also can be vulcanized together with steel plate, with bolts or not. Features: It combines wear-resistance of ceramic of ceramic and impact-resistance of rubber, apply to conveying systems equipment work under normal temperture,and can bear some impact. Impact-resistant and wear-resistant ceramic rubber composite lining board (three-in-one lining board) is mainly used in the thermal power industry (falling coal pipe lining board), the steel industry (blast furnace hopper, cylindrical mixer), the cement building materials industry (clinker clinker) Chute), smelting industry (hopper), machinery industry (hopper), coal industry (transportation station chute), mining industry (initial break, medium and fine breakage, transfer chute hopper), chemical industry (chute), organic silicon industry (level two) Heavy-duty cyclone dust collector), coal chemical industry (falling coal pipe), port terminal (ship unloader hopper), commercial industry (mixer liner), automobile manufacturing and other heavy-wearing industries. Rubber wear liner size 500*500*10mm Ceramic mesterial 92% alumina Bolts Without Ceramic size 20*20*6mm Rubber thickness 4mm Seam tolerance 3�±1mm Rubber wear liner size weight 6.8kg/piece Sample time 1-5 days Other size for your reference: 300*300*8mm 515*515*8mm 500*500*10mm 400*200*14mm 302*302*15mm 300*300*10mm 500*500*15mm 291*288*18.5mm 500*500*20mm 500*500*29mm 500*500*50mm 300*300*63mm 500*250*95mm 500*500*28mm 500*400*30mm 500*100*30mm 500*500*50mm 500*500*20mm 390*190*25mm 300*300*33mm 415*240*32mm 292*444*32mm 500*500*32mm 390*190*63mm 390*390*63mm
1. Brake shoe key 2. Pedestral key 3. C-10 knuckle pin 4. Yok pipe 5. Vertical wear liner 6. Hatch latch assy. 7. Small forgings
We are supplier and exporter of Kaolin Ore. Features Of Meta Kaolin Metakaolin is form of calcined or dehydroxilated china clay. During calcination morphological, mineralogical and chemical changes occur which result in products with excellent optical properties. Applications Ceramics Glass Paper Cosmetics. Kaolin uses are multiple and diverse. Kaolin are used as functional filler, extender, ceramic raw material and pigment because of its whiteness and fine particle size. Kaolin also hold importance as raw material in refractory applications, concrete, rubber and fiber glass manufacturing.
Isolation Scrub Suits Non Woven PP Medical Disposable Coverall Overall Protective Clothes BLUE DISPOSABLE COVERALLS: Non sterile blue overalls for use in many general application areas. Adult clothing is durable, comfortable, easy to put on. Not made with natural rubber latex. Suitable for cleaning, painting and any wet general maintenance areas and more.� CONVENIENT CONSTRUCTION: Unisex protective clothing is made from fluid resistant PP non-woven material making them strong yet� comfortable to wear. Crawl space suit provides a slight barrier against small amounts of fluid penetration. The material is lint free and resistant to tears and punctures. COMFORTABLE AND EASY TO PUT ON:� comfortable and easy to put on. Painters coveralls include an attached hood, zipper front entry, elastic wrists, elastic ankles. BREATHABLE & LIGHTWEIGHT: Disposable coveralls paint are cool, lightweight, breathable and comfortable. Painters coveralls for men cover your body and clothing and create a physical barrier between your clothing and liquid or dust. WIDELY USED: used in various industries including food processing, food service, and sanitation. Used in minimal risk situations. This hasmat suit is excellent in laboratory.
Body exercise colorful neoprene cast iron plastic Dip dumbbell weight set Most Flexible Durable Home Gym Colored Impregnated Plastic Dumbbell set 10kg 15kg 20kg 25kg 30kg 40kg Colorful Vinyl Coated Rubber Dumbbell Set Colorful Rubber Dumbbell Set inside cast iron and outside vinyl; coated,no smelling bright smooth on surface, wear resisting corrosion resistance comfortable to touch . the dumbbell bar is high quality chrome Anti skid colorful rubber bar Colorful rubber dumbbell 2Pair 10kg Single 5kg (plate 8pcs+2bar+4spinlocks) 2Pair 15kg Single7.5kg (plate12pcs+2bar+4spinlocks) 2Pair 20kg Single10kg (plate12pcs+2bar+4spinlocks) 2Pair 25kg Single12.5kg (plate12pcs+2bar+4spinlocks) 2Pair 30kg Single15kg (plate16pcs+2bar+4spinlocks) 2Pair 40kg Single20kg (plate16pcs+2bar+4spinlocks)
PA66 GF regrind black color Pa6 / pa66 is mainly applied as follows: 1. Improves nylon water absorption and improves size stability of the product. 2. Improved nylon fire resistance to meet the requirements of electronics, electrical, communications and other industries. 3. Improved mechanical strength of nylon to achieve the strength of metal materials, metal replacement. 4. Improves nylon low-temperature resistance and enhanced resistance to environmental stress. 5. Improves nylon wear resistance to meet high wear resistance requirements. 6. Improves nylon antistatic properties to meet its extraction requirements and mechanical applications. 7. Improves nylon heat resistance to adapt to high temperature conditions such as car engines. 8. Reduce nylon cost and improve product competitiveness. Through the above modification, high performance and functionalization of nylon composite materials are realized, thereby promoting the development of industries involving high performance and high quality. MATERIAL: PA66 GF regrind black color CATEGORY: PA66 GF TYPE: Regrind GRADE: Black color SPECIFICATION: GF50. 1 full container available Origin: Tunisia LOADING WEIGHT: 23 Ton FOB (USD/Ton): 850$ - 1050$ Packaging: Jumbo Bag Est. Shipping Time: 15, 30, 45 days
Rubber wear liner size 500*500*10mm Ceramic mesterial 92% alumina Bolts Without Ceramic size 20*20*6mm Rubber thickness 4mm Seam tolerance 3�±1mm Rubber wear liner size weight 6.8kg/piece Sample time 1-5 days Product description: Also named wear cermaic parts, wear rubber ceramic plate, wear resistant ceramic pads. Ceramic rubber composite pads&plate is use of rubber vulcanization process, to embed the wear-resistant ceramic vulcanized into rubber, stick it on the inner all of equipment with the adhesice paste.As customers' requirment, it also can be vulcanized together with steel plate, with bolts or not. Features: It combines wear-resistance of ceramic of ceramic and impact-resistance of rubber, apply to conveying systems equipment work under normal temperture,and can bear some impact. Impact-resistant and wear-resistant ceramic rubber composite lining board (three-in-one lining board) is mainly used in the thermal power industry (falling coal pipe lining board), the steel industry (blast furnace hopper, cylindrical mixer), the cement building materials industry (clinker clinker) Chute), smelting industry (hopper), machinery industry (hopper), coal industry (transportation station chute), mining industry (initial break, medium and fine breakage, transfer chute hopper), chemical industry (chute), organic silicon industry (level two) Heavy-duty cyclone dust collector), coal chemical industry (falling coal pipe), port terminal (ship unloader hopper), commercial industry (mixer liner), automobile manufacturing and other heavy-wearing industries.
1.HC series wear-resistant ceramic liners, 92 / T95 / ZTA wear-resistant ceramic liner (alumina liner, zirconium toughed aluminum composite liner, zirconia plate) Main products : 1.HC series wear-resistant ceramic liners, 92/T95/ZTA wear-resistant ceramic liner (alumina liner, zirconium toughed aluminum composite liner, zirconia plate) 2. Alumina ball, zirconium silicate ball, zirconia toughed alumina ball, zirconium ball), agate ball, polyurethane ball. 3.Three-in-one, Two-in-one vulcanized ceramic runner sheet, ceramic mending compound, ceramic lining cyclone, ceramic lining pipe. 4.Silicon Carbide Brick, Silicon Carbide Plate, Silicon Carbide Nozzle. 5.Dry grinding ball mill, wet grinding ball mill, circulating stirring mill, ceramic ball grinding tank, etc.
Kaolinite is the mineral that is derived from the rock called â??Kaolinâ?? and from there, it gets its name. It is also commonly known as â??China Clayâ??. Kaolin is mined from the regions of Gujarat, Rajasthan, Kerala, West Bengal and Jharkhand in India The physical properties of Kaolin include high brightness, non-abrasiveness, poor conductivity of heat and electricity and it has naturally fine particles. Kaolin remains white after calcination due to its refractory properties and can be easily dispersed in water. There are several variations within Kaolin such as Hydrous Kaolin, Metakaolin and Calcined Kaolin. We offer a vast range of Kaolin-based minerals to several businesses from paper manufacturing to porcelain tableware, paints, cosmetics, packaging, rubber and pharmaceuticals to name a few. We customize our minerals according to the needs of the industry of our clients. Hydrous Kaolin has fine particles with plate-like shapes and inertness in terms of chemical reactivity, whereas, Metakaolin is created by the process of calcination of Kaolin. It is a white mineral additive which is most popularly used in cement-based products. In contrast to this, Calcined Kaolin is manufactured by heating the finest natural kaolin to high temperatures in a kiln. This calcination process changes the size and shape of the particles, enhances the whiteness and hardness of the mineral and improves its electrical conductivity. Kaolinite is a clay mineral, with the chemical composition Alâ??Siâ??Oâ??(OH)â?? Various Industrial Usages: Kaolin is a very important mineral in the ceramics industry. Itâ??s high fusion temperature and white firing characteristic makes it perfect to be used in the manufacture of sanitaryware, tableware, floors & tiles and refractories. In the construction industry, kaolin is used to enhance the mechanical properties, porosity and look of several types of cement and concrete. It is also an impeccable source of alumina source in the manufacturing of fiberglass. Kaolin is used in paper manufacturing and fiber-based packaging also. Our Kaolin mineral enhances surface functionality when it is used as fillers or coating pigments and thus further helping in reducing the manufacturing cost of the paper or the packaging. Moreover, it is extensively used in decorative paints formulations as it is a natural opacifier and it is the perfect mineral when high gloss is required. Our specialized Kaolin also can be used as multi-purpose fillers to improve the performance of adhesives, plastics and rubber. We are extremely confident in our offering of Kaolin mineral as we understand how Kaolin can optimize the performance, reduce the costs and can achieve minimum carbon footprint in our clientâ??s end products
The feldspar mineral is by far the most plentiful mineral found beneath the earth. It is used in most of the daily usage products. Feldspars are classified into three types: feldspar, pegmatite, and feldspathic sand, and their alumina and alkali content make them ideal for industrial purposes Feldspars and pegmatites are useful functional fillers in the paint and glue industries, as well as fluxing agents in ceramics and glass manufacture. Feldsparâ??s physical properties include high potassium and low iron content. It has pH stability and has consistent hardness with a rating of 6 to 6.5 on the Mohs scale. It is majorly found and mined in the state of Rajasthan. We at Aryan tiles develop Feldspar minerals with the specialized qualities to cater to the specific industries such as ceramics, glass, and paints to mention a few. Feldspar is an excellent source of alumina leading to improvement in the end-product hardness, durability, and chemical corrosion resistance. A feldspar is typically referred to as 'potash' if there is significantly more potassium than sodium (typically there will be 2-5% Na2O). It is also used as fluxing agent for flat and container glass, as well as insulation wools and also in the ceramic industry. Our Feldspar mineral is known for its low quantities of colored oxides, making them ideal for manufacturing white tiles and sanitary ware. Further, Feldspar is also used in paints industry as it has great dispersibility, chemical inertness, pH stability, abrasion resistance and low viscosity. White soda feldspar has high sodium content. It is a common raw ingredient used in glass, ceramics, and to some extent in paint, plastics, and rubber as a filler and extender. The alumina from feldspar improves the hardness, durability, and chemical corrosion resistance of glass. Feldspar's alkalis (calcium oxide, potassium oxide, and sodium oxide) operate as a flux in ceramics, reducing the melting temperature of a mixture. We at Aryan Tiles have an enormous selection of both white potash and white soda feldspar minerals. We have a deep understanding of how our Feldspar minerals can be used in manufacturing our customersâ?? end-products and suit their particular industryâ??s needs. And, thus we have been able to supply to various industries and optimize our customersâ?? product manufacturing with our premium quality mineral