What Actions do We've for the Choice Principles of Chrome Corundum

The main mineral composition of Chromium corundum is -Al2O3-Cr2O3 strong resolution. The secondary mineral composition is a small level of composite spinelle (or composite spinelle -free), and the refractory bricks whose chromium oxide content is 1% ~ 30%. There are two sorts: cast chrome corundum brick and sintered corundum brick.

Generally, the chromium corundum brick refers towards the sintered chrome corundum brick. It utilizes |¨¢-Al2O3 as raw material, being added the correct level of chromium oxide powder and fine powder of Chromium corundum clinker, soon after being molded and burnt at high temperature. Chromium oxide content material of sintered chrome brick is generally reduce than that on the cast chrome corundum brick. It is possible to also use mud casting strategy to have a preparation, uniformly mixing alpha-Al2O3 powder and chromium oxide powder, adding remedy adhesive agent and organic bonding agent to create thick mud, although adding some chromium corundum clinker, utilizing grouting approach to make unfired bricks and burn them. It can be utilized because the glass furnace lining, plate brick of wire drawing glass flow liquid hole cover and utilised 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 as the major components, what's frequently utilised is magnesium brick. Magnesia brick containing Magnesium Oxide greater than 80% to 85%, getting great resistance around the basic slag and iron slag, whose refractoriness is higher than that of clay brick and silica brick, is primarily utilized in open hearth furnace, oxygen converter, electric furnace, non-ferrous metal smelting gear and high temperature gear.

two. Neutral refractory components use aluminum oxide, chromium oxide or carbon as primary ingredients. Alumina products containing greater than 95% of alumina are a sort of high quality refractory materials. Chrome brick utilizing chromium oxide as the principal component has great corrosion resistance to steel slag, but the poor heat shock resistance, reduce high temperature load deformation temperature. Carbonaceous refractory has carbon brick, graphite and silicon carbide merchandise, whose coefficient of thermal expansion is quite low, having high thermal conductivity, heat vibration performance, high strength at high temperature, acid and alkali and salt corrosion, with out any wetting from metal and slag, and soft lightweight. It?¡¥s broadly used as a high-temperature furnace lining components, as well as petroleum, chemical lined autoclave.

three. Acid refractory material utilizes silicon oxide as the main element and what we typically use is silica brick and clay brick. Silica brick is siliceous goods containing silicon oxide above 93%, and also the employed material is silica stone, waste silica brick and so on, whose anti-acid slag includes a robust erosion ability, high load softening temperature, and whose volume will not shrink right after repeated calcination, as well as a slight expansion.; but it?¡¥s vulnerable for the erosion of basic slag, using a poor thermal shock resistance. The silica brick is mainly utilised inside the thermal equipment including coke oven, glass furnace, acid furnace and so on. Clay brick utilizes refractory clay as the primary raw material, containing 30% to 46% alumina, and belongs to a weak acid refractory and fine heat shock resistance, obtaining a corrosion resistance against acid slag, so it includes a wide range of applications.

4. In particular occasions, the utilised chrome corundum has higher temperature oxide materials, for example alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconia, and so on., and some refractory compounds, like carbides, nitrides, borides, silicides and sulfides; and high temperature composite supplies, including metal ceramic, higher temperature inorganic coatings and fiber reinforced ceramics. Usually in the market, we are able to typically see Cr2O3?¡éCr2O3 compound, occasionally even Cr2O3 99% and Chrome Oxide Green Powder.