What Actions do We have for the Selection Principles of Chrome Corundum

The main mineral composition of Chromium corundum is -Al2O3-Cr2O3 strong remedy. The secondary mineral composition is actually a little quantity of composite spinelle (or composite spinelle -free), and also the refractory bricks whose chromium oxide content material is 1% ~ 30%. You can find two types: cast chrome corundum brick and sintered corundum brick.

In general, the chromium corundum brick refers to the sintered chrome corundum brick. It uses |¨¢-Al2O3 as raw material, getting added the correct volume of chromium oxide powder and fine powder of Chromium corundum clinker, soon after being molded and burnt at higher temperature. Chromium oxide content material of sintered chrome brick is generally lower than that on the cast chrome corundum brick. It is possible to also use mud casting approach to possess a preparation, uniformly mixing alpha-Al2O3 powder and chromium oxide powder, adding solution adhesive agent and organic bonding agent to create thick mud, although adding some chromium corundum clinker, utilizing grouting strategy to create unfired bricks and burn them. It can be employed because the glass furnace lining, plate brick of wire drawing glass flow liquid hole cover and utilized for hot metal pretreatment device, garbage incinerator, coal slurry pressurized gasification furnace backing, etc.

What measures do we've for the choice principles of chrome corundum?

1. Simple Refractory uses magnesium Oxide and calcium oxide because the major components, what exactly is frequently utilized is magnesium brick. Magnesia brick containing Magnesium Oxide greater than 80% to 85%, having great resistance around the basic slag and iron slag, whose refractoriness is greater than that of clay brick and silica brick, is mostly utilized in open hearth furnace, oxygen converter, electric furnace, non-ferrous metal smelting equipment and higher temperature equipment.

two. Neutral refractory materials use aluminum oxide, chromium oxide or carbon as major ingredients. Alumina products containing more than 95% of alumina are a sort of good quality refractory components. Chrome brick employing chromium oxide because the principal element has very good corrosion resistance to steel slag, but the poor heat shock resistance, lower higher temperature load deformation temperature. Carbonaceous refractory has carbon brick, graphite and silicon carbide products, whose coefficient of thermal expansion is extremely low, getting higher thermal conductivity, heat vibration performance, higher strength at high temperature, acid and alkali and salt corrosion, without any wetting from metal and slag, and soft lightweight. It?¡¥s extensively utilised as a high-temperature furnace lining materials, as well as petroleum, chemical lined autoclave.

3. Acid refractory material makes use of silicon oxide as the principal component and what we commonly use is silica brick and clay brick. Silica brick is siliceous merchandise containing silicon oxide above 93%, and the utilized material is silica stone, waste silica brick and so on, whose anti-acid slag includes a strong erosion ability, higher load softening temperature, and whose volume does not shrink following repeated calcination, and also a slight expansion.; but it?¡¥s vulnerable to the erosion of standard slag, having a poor thermal shock resistance. The silica brick is primarily utilized in the thermal equipment like coke oven, glass furnace, acid furnace and so on. Clay brick uses refractory clay as the primary raw material, containing 30% to 46% alumina, and belongs to a weak acid refractory and fine heat shock resistance, possessing a corrosion resistance against acid slag, so it has a wide selection of applications.

four. In special occasions, the employed chrome corundum has higher temperature oxide supplies, such as alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconia, and so forth., and some refractory compounds, for example carbides, nitrides, borides, silicides and sulfides; and higher temperature composite materials, for example metal ceramic, high temperature inorganic coatings and fiber reinforced ceramics. Typically in the market, we can often see Cr2O3?¡éCr2O3 compound, sometimes even Cr2O3 99% and Chrome Oxide Green Powder.