Caviar, silicon, copper nuggets, copper.Exports
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All details and specifications will be shared on request
copper (cathodes, scrap...), aluminium ingots a7, bauxite, aluminium carbonate, hematite iron, silicon, natural granite, natural black basalt..
White 5 Layers: 1st layer non-woven 50g, 2nd layer ES heat-seal cotton 60g, 3rd/4th layer melt blown 20g, 5th layer shaped cotton 180g Style: Dual Headband with adjustable clip Adjustable nose clip Comfortable to wear
White FFP3 / N99 Respirator MOQ 100,000 7 Layer: 1st layer non-woven 50g, 2nd layer ES heat-seal cotton 60g, 3rd/4th/5th layer melt blown 20g, 6th layer shaped cotton 180g, 7th layer latex protective cotton Style: Dual Headband with adjustable clip Comfortable to wear
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Silicon dioxide, also known as silica (from the Latin silex), is a chemical compound that is an oxide of silicon with thechemical formula SiO2. It has been known since ancient times. Silica is most commonly found in nature as quartz, as well as in various living organisms. In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and most abundant families of materials, existing both as several minerals and being produced synthetically. Notable examples include fused quartz, crystal, fumed silica, silica gel, and aerogels. Applications range from structural materials to microelectronics to components used in the food industry.
Ferro Silico Manganese (FeSiMn) is a ferrous alloy that is produced by melting manganese ore and quartzite in the presence of coke in an arc furnace . Ferro Silico Manganese is an important deoxidizer, desulphurizer, and alloying element that increases the tensile strength, toughness, stiffness, wear resistance, and hardenability of steel, helping to improve the safety and effectiveness of the end product . It is widely used in the steelmaking industry and has become the essential deoxidizing agent and additive in the steelmaking industry . The process of producing Ferro Silico Manganese is much more difficult than ferromanganese. The main reason is that a higher temperature is needed to reach the desired silicon level �¹. Slag generated in the production of high carbon ferromanganese is commonly used to produce FeSiMn . Ferro Silico Manganese is available in different types, and it can be used for various applications, such as cladding, decking, ceilings, walls, and saunas . In summary, Ferro Silico Manganese is a ferrous alloy that is produced by melting manganese ore and quartzite in the presence of coke in an arc furnace. It is widely used in the steelmaking industry as an important deoxidizer, desulphurizer, and alloying element that increases the tensile strength, toughness, stiffness, wear resistance, and hardenability of steel, helping to improve the safety and effectiveness of the end product. It is available in different types and can be used for various applications, such as cladding, decking, ceilings, walls, and saunas.
Zirconium silicate, also zirconium orthosilicate, (ZrSiO4) is a chemical compound, a silicate of zirconium. It occurs in nature as the zircon, a silicate mineral. Zirconium silicate is also sometimes known as zircon flour. Zirconium silicate is usually colorless, but impurities induce various colorations. It is insoluble in water, acids, alkali andaqua regia. Hardness is 7.5 on the Mohs scale. Uses: Zirconium silicate is used for manufacturing refractory materials for applications where resistance to corrosion by alkalimaterials is required. It is also used in production of some ceramics, enamels, and ceramic glazes. In enamels and glazes it serves as an opacifier. It can be also present in some cements. Another use of zirconium silicate is as beads for milling and grinding. Thin films of zirconium silicate and hafnium silicate produced by chemical vapor deposition, most often MOCVD, can be used as a high-k dielectric as a replacement for silicon dioxide in semiconductors. Zirconium silicates have also been studied for potential use in medical applications. For example, ZS-9 is a zirconium silicate that was designed specifically to trap potassium ions over other ions throughout the gastrointestinal tract. It is undergoing clinical trials for the treatment of hyperkalemia. Zirconium disillicate is used in some Dental Crowns because of its hardness and because it is chemically nonreactive.
Sulfur or sulphur (British English; see spelling below) is a chemical element with symbol S and atomic number 16. It is an abundant, multivalentnon-metal. Under normal conditions, sulfur atoms form cyclic octatomic molecules with chemical formula S8. Elemental sulfur is a bright yellowcrystalline solid when at room temperature. Chemically, sulfur can react as either an oxidant or reducing agent. It oxidizes most metals and severalnonmetals, including carbon, which leads to its negative charge in most organosulfur compounds, but it reduces several strong oxidants, such asoxygen and fluorine. Sulfur occurs naturally as the pure element (native sulfur) and as sulfide and sulfate minerals. Elemental sulfur crystals are commonly sought after by mineral collectors for their distinct, brightly colored polyhedron shapes. Being abundant in native form, sulfur was known in ancient times, mentioned for its uses in ancient India, ancient Greece, China and Egypt. Fumes from burning sulfur were used as fumigants, and sulfur-containing medicinal mixtures were used as balms and antiparasitics. Sulfur is referred to in the Bible as brimstone (burn stone) in English, with this name still used in several nonscientific tomes.[3] It was needed to make the best quality of black gunpowder. In 1777, Antoine Lavoisier helped convince the scientific community that sulfur was a basic element, rather than a compound. Elemental sulfur was once extracted from salt domes where it sometimes occurs in nearly pure form, but this method has been obsolete since the late 20th century. Today, almost all elemental sulfur is produced as a byproduct of removing sulfur-containing contaminants from natural gas andpetroleum. The element's commercial uses are primarily in fertilizers, because of the relatively high requirement of plants for it, and in the manufacture of sulfuric acid, a primary industrial chemical. Other well-known uses for the element are in matches, insecticides and fungicides. Many sulfur compounds are odoriferous, and the smell of odorized natural gas, skunk scent, grapefruit, and garlic is due to sulfur compounds.Hydrogen sulfide produced by living organisms imparts the characteristic odor to rotting eggs and other biological processes.
Bauxite is an aluminium ore and is the main source of aluminium. This form of rock consists mostly of the minerals gibbsite Al(OH)3, boehmite ?-AlO(OH), and diaspore a-AlO(OH), in a mixture with the two iron oxides goethite and haematite, the clay mineral kaolinite, and small amounts ofanatase TiO2. Bauxite was named after the village Les Baux in southern France, where it was first recognized as containing aluminium and named by the French geologist Pierre Berthier in 1821. Bauxite Formation Lateritic bauxites (silicate bauxites) are distinguished from karst bauxite ores (carbonate bauxites). The early discovered carbonate bauxites occur predominantly in Europe and Jamaica above carbonate rocks (limestone and dolomite), where they were formed by lateritic weathering and residual accumulation of intercalated clays or by clay dissolution residues of the limestone. The lateritic bauxites are found mostly in the countries of the tropics. They were formed by lateritization of various silicate rocks such as granite, gneiss,basalt, syenite, and shale. In comparison with the iron-rich laterites, the formation of bauxites depends even more on intense weathering conditions in a location with very good drainage. This enables the dissolution of the kaolinite and the precipitation of the gibbsite. Zones with highest aluminium content are frequently located below a ferruginous surface layer. The aluminium hydroxide in the lateritic bauxite deposits is almost exclusively gibbsite.
Red shale Shale is a fine-grained sedimentary rock that forms from the compaction of silt and clay-size mineral particles that we commonly call "mud". Application • Shale is used to produce cement, • Terra cotta pots, bricks and tile roofs.
Sisal fibre is derived from the leaves of the plant. It is usually obtained by machine decortications in which the leaf is crushed between rollers and then mechanically scraped. The fibre is then washed and dried by mechanical or natural means. The dried fibre represents only 4% of the total weight of the leaf. Once it is dried the fibre is mechanically double brushed. The lustrous strands, usually creamy white, average from 80 to 120 cm in length and 0.2 to 0.4 mm in diameter Sisal fibre is fairly coarse and inflexible. It is valued for cordage use because of its strength, durability, ability to stretch, affinity for certain dyestuffs, and resistance to deterioration in saltwater. Sisal is used by industry in three grades: The lower grade fibre is processed by the paper industry because of its high content of cellulose and hemicelluloses. The medium grade fibre is used in the cordage industry for making: ropes, baler and binders twine. Ropes and twines are widely employed for marine, agricultural, and general industrial use. The higher-grade fibre after treatment is converted into yarns and used by the carpet industry. The fibre is also used for non-woven matting, brushing and roving.
A cement is a binder, a substance that sets and hardens independently, and can bind other materials together. The word "cement" traces to theRomans, who used the term opus caementicium to describe masonry resembling modern concrete that was made from crushed rock with burnt lime as binder. The volcanic ash and pulverized brick additives that were added to the burnt lime to obtain a hydraulic binder were later referred to as cementum,cimentum, cäment, and cement. Cements used in construction can be characterized as being either hydraulic or non-hydraulic. Hydraulic cements (e.g., Portland cement) harden because of hydration, a chemical reaction between the anhydrous cement powder and water. Thus, they can harden underwater or when constantly exposed to wet weather. The chemical reaction results in hydrates that are not very water-soluble and so are quite durable in water. Non-hydraulic cements do not harden underwater; for example, slaked limes harden by reaction with atmospheric carbon dioxide. The most important uses of cement are as an ingredient in the production of mortar in masonry, and of concrete, a combination of cement and anaggregate to form a strong building material.
Iron ore is any rock or mineral from which iron can economically be extracted. It comes in a variety of colors, including dark gray, bright yellow, deep purple, and rusty red. The iron comes in the form of iron oxides such as magnetite, hematite, limonite, goethite, or siderite. Economically viable forms of ore contain between 25% and 60% iron. In the old days of mining, some ores, known as "natural ores," had 66% iron and could be fed into iron-making blast furnaces directly. The three primary sources of iron ore are banded iron formations, magmatic magnetite ore deposits, and hematite ore. The most metal is extracted from banded iron formations, geological structures laid down mostly between 3 and 1.2 billion years ago. Blue-green algae released oxygen in the days when the atmosphere and oceans were very oxygen-poor, binding together with dissolved iron in the world's oceans. These iron fixation events went through cycles as the algae had alternating blooms and busts, leaving the characteristic bands seen in banded iron formations. This ore is in either the form of magnetite or hematite. Banded iron formations are found on all continents, but especially rich deposits are found in Australia, Brazil, and the United States. Another prominent source of iron is found as magmatic magnetite iron ore deposits, formed during ancient volcanic eruptions that released large amounts of magnetite which later crystallized. Granite-associated deposits have been found in places like Malaysia and Indonesia and require very little post-processing to extract the iron. Titanomagnetite, a special class of magmatic magnetite ore, also serves as a source of titanium and vanadium, which is extracted via specialized smelters. A third source is in hematite ore deposits, which are found on all continents, but especially in Australia, Brazil, and Asia. Most hematite originates from banded iron formations that have undergone chemical alteration over billions of years due to hydrothermal fluids. The world's largest producer of iron ore, Vale, located in Brazil, produces it from hematite ore. Vale produces 15% of the entire world's iron supply. In total, worldwide ore production is about one billion metric tons.
Manganese is a chemical element, designated by the symbol Mn. It has the atomic number 25. It is found as a free element in nature (often in combination with iron), and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Historically, manganese is named for various black minerals (such as pyrolusite) from the same region of Magnesia in Greece which gave names to similar-sounding magnesium, Mg, and magnetite, an ore of the element iron, Fe. By the mid-18th century, Swedish chemist Carl Wilhelm Scheelehad used pyrolusite to produce chlorine. Scheele and others were aware that pyrolusite (now known to be manganese dioxide) contained a new element, but they were not able to isolate it. Johan Gottlieb Gahn was the first to isolate an impure sample of manganese metal in 1774, byreducing the dioxide with carbon. Manganese phosphating is used as a treatment for rust and corrosion prevention on steel. Depending on their oxidation state, manganese ionshave various colors and are used industrially as pigments. The permanganates of alkali and alkaline earth metals are powerful oxidizers. Manganese dioxide is used as the cathode (electron acceptor) material in zinc-carbon and alkaline batteries. In biology, manganese(II) ions function as cofactors for a large variety of enzymes with many functions.[1] Manganese enzymes are particularly essential in detoxification of superoxide free radicals in organisms that must deal with elemental oxygen. Manganese also functions in the oxygen-evolving complex of photosynthetic plants. The element is a required trace mineral for all known living organisms. In larger amounts, and apparently with far greater activity by inhalation, it can cause a poisoning syndrome in mammals, with neurological damage which is sometimes irreversible.
Chrome Ore The only ore of chromium, the metal used to make stainless steel, nichrome and chrome plating. What is Chrome Ore? Chrome Ore is an oxide mineral composed of chromium, iron and oxygen (FeCr2O4). It is a dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when Chrome Ore-bearing rocks are altered by heat or weathering. Chrome Ore is important because it is the only economic ore ofchromium, an essential element for a wide variety of metal, chemical and manufactured products. Many other minerals contain chromium, but none of them are found in deposits that can be economically mined to produce chromium. Properties of Chrome Ore Chrome Ore can be challenging to identify. Several properties must be considered to differentiate it from other metallic ores. Hand specimen identification of Chrome Ore requires a consideration of: color, specific gravity, luster, and a characteristic brown streak. The most important clue to identifying Chrome Ore is its association with ultrabasic igneous rocks and metamorphic rocks such as serpentinite. Physical Properties of Chrome Ore Chrome Ore is sometimes slightly magnetic. This can cause it to be confused with magnetite. Chrome Ore and ilmenite have very similar properties. Careful observations of hardness, streak and specific gravity are required to distinguish these minerals in hand specimens.
