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

The main mineral composition of Chromium corundum is -Al2O3-Cr2O3 solid resolution. The secondary mineral composition is a tiny amount of composite spinelle (or composite spinelle -free), along with the refractory bricks whose chromium oxide content material is 1% ~ 30%. You can find two kinds: cast chrome corundum brick and sintered corundum brick.

Normally, the chromium corundum brick refers for the sintered chrome corundum brick. It makes use of |¨¢-Al2O3 as raw material, becoming added the right level of chromium oxide powder and fine powder of Chromium corundum clinker, after becoming molded and burnt at high temperature. Chromium oxide content material of sintered chrome brick is normally reduced than that from the cast chrome corundum brick. You'll be able 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 make thick mud, even though adding some chromium corundum clinker, making use of grouting approach to produce 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, and so on.

What methods do we've got for the selection principles of chrome corundum?

1. Standard Refractory utilizes magnesium Oxide and calcium oxide as the major elements, what exactly is frequently employed is magnesium brick. Magnesia brick containing Magnesium Oxide more than 80% to 85%, having great resistance around the basic slag and iron slag, whose refractoriness is larger 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 components use aluminum oxide, chromium oxide or carbon as main ingredients. Alumina merchandise containing greater than 95% of alumina are a kind of premium quality refractory materials. Chrome brick using chromium oxide as the principal element has great corrosion resistance to steel slag, but the poor heat shock resistance, decrease high temperature load deformation temperature. Carbonaceous refractory has carbon brick, graphite and silicon carbide goods, whose coefficient of thermal expansion is extremely low, having higher thermal conductivity, heat vibration overall performance, higher strength at higher temperature, acid and alkali and salt corrosion, with no any wetting from metal and slag, and soft lightweight. It?¡¥s extensively utilised as a high-temperature furnace lining supplies, also as petroleum, chemical lined autoclave.

3. Acid refractory material uses silicon oxide because the primary element and what we generally use is silica brick and clay brick. Silica brick is siliceous items containing silicon oxide above 93%, and the utilized material is silica stone, waste silica brick and so on, whose anti-acid slag includes a powerful erosion ability, high load softening temperature, and whose volume does not shrink soon after repeated calcination, as well as a slight expansion.; but it?¡¥s vulnerable to the erosion of fundamental slag, with a poor thermal shock resistance. The silica brick is mainly employed within the thermal equipment for example coke oven, glass furnace, acid furnace etc. Clay brick utilizes refractory clay as the principal raw material, containing 30% to 46% alumina, and belongs to a weak acid refractory and fine heat shock resistance, having a corrosion resistance against acid slag, so it features a wide selection of applications.

4. In special occasions, the employed chrome corundum has higher temperature oxide components, including alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconia, etc., and a few refractory compounds, including carbides, nitrides, borides, silicides and sulfides; and higher temperature composite components, for example metal ceramic, high temperature inorganic coatings and fiber reinforced ceramics. Usually within the market, we are able to typically see Cr2O3?¡éCr2O3 compound, often even Cr2O3 99% and Chrome Oxide Green Powder.