Brazil, the world's largest coffee bean producer, recently announced that it is facing the worst drought in 91 years, affecting local hydropower generation and agricultural chromium oxide keeps going up.
A refractory material is a material that resists to heat, pressure or chemical erosion and decomposition, and maintains strength and shape at high temperatures. Refractories are widely used in iron and steel, non-ferrous metals, glass, cement, ceramics, petrochemical, machinery, boiler, light industry, electric power, military industry and other fields.
Based on chemical composition, refractories can be divided into acidic refractories, alkaline refractories, and neutral refractories.
Acidic refractories are mainly composed of silica and commonly used silica bricks and clay bricks. Silicon brick is a silicon product containing more than 94% silicon oxide, and the raw materials used are silica, waste silicon brick, etc., which has strong resistance to acid slag erosion, high load softening temperature, and does not shrink or even expand slightly after repeated calcination; but it is easy to be eroded by alkaline slag and poor thermal shock resistance. Silicon bricks are mainly used in coke ovens, glass furnaces, acid steelmaking furnaces and other thermal equipment. Clay brick takes refractory clay as the main raw material, contains 30% alumina, 46% alumina, is a weak acid refractory, has good thermal vibration resistance, corrosion resistance to acid slag and is widely used.
Neutral refractories are mainly composed of alumina, chromium oxide or carbon. Corundum products containing more than 95% alumina are high quality refractories with a wide range of applications. The chromium brick with chromium oxide as the main composition has good corrosion resistance to steel slag, but poor thermal shock resistance and low high temperature load deformation temperature. Carbon refractories include carbon bricks, graphite products and silicon carbide products, which have low coefficient of thermal expansion, high thermal conductivity, good thermal shock resistance, high temperature strength and resistance to acid, alkali and salt, especially weak acid and alkali. It is not wetted by metal and molten slag and is light. It is widely used as high temperature furnace lining material, as well as autoclave lining in petroleum and chemical industry.
Basic refractories are mainly composed of magnesia and calcium oxide, and magnesia bricks are commonly used. Magnesia bricks containing more than 85% magnesia have good resistance to alkaline slag and iron slag, and their fire resistance is higher than that of clay bricks and silicon bricks. It is mainly used in open hearth furnace, oxygen blowing converter, electric furnace, non-ferrous metal smelting equipment and some high temperature equipment.
Chromium Oxide Price
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India, the world's third-largest oil importer and consumer, imported 3.2 per cent less oil in July than in June to 4.63 million barrels a day, according to data. Of this total, Russian crude oil imports were about 877400 barrels per day, down about 7.3 per cent from the previous month, while Saudi crude oil imports were about 824700 barrels per day, up 25.6 per cent from the previous month. The move comes after Saudi Arabia lowered its official sales price in June and July. Middle East oil's share of India's overall imports fell slightly in July as India's purchases from Iraq fell 9.3 per cent below the 1 million b / d mark for the first time in 10 months compared with June.
However, Russia remains India's second-largest oil supplier, with Iraq in first place and Saudi Arabia in third place.
Luoyang Tongrun Nano Technology is a trusted chemical manufacturer and supplier providing high-quality chemicals and Nanomaterials. If you are looking for the chromium oxide, please feel free to contact us and send an inquiry.
Brazil, the world's largest coffee bean producer, recently announced that it is facing the worst drought in 91 years, affecting local hydropower generation and agricultural chromium oxide keeps going up. A refractory material is a materia…
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