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

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

In general, the chromium corundum brick refers towards the sintered chrome corundum brick. It utilizes |¨¢-Al2O3 as raw material, being added the correct volume of chromium oxide powder and fine powder of Chromium corundum clinker, right after getting molded and burnt at higher temperature. Chromium oxide content material of sintered chrome brick is usually decrease than that in the cast chrome corundum brick. You'll be able to also use mud casting method to have a preparation, uniformly mixing alpha-Al2O3 powder and chromium oxide powder, adding resolution adhesive agent and organic bonding agent to create thick mud, although adding some chromium corundum clinker, utilizing grouting method to make unfired bricks and burn them. It may be utilized 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 steps do we have for the selection principles of chrome corundum?

1. Fundamental Refractory uses magnesium Oxide and calcium oxide as the main elements, what's frequently utilized is magnesium brick. Magnesia brick containing Magnesium Oxide more than 80% to 85%, possessing very good resistance around the fundamental slag and iron slag, whose refractoriness is greater than that of clay brick and silica brick, is mostly used in open hearth furnace, oxygen converter, electric furnace, non-ferrous metal smelting equipment and high temperature gear.

2. Neutral refractory materials use aluminum oxide, chromium oxide or carbon as principal components. Alumina merchandise containing greater than 95% of alumina are a kind of top quality refractory materials. Chrome brick utilizing chromium oxide because the main component 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 quite low, having high thermal conductivity, heat vibration performance, high strength at high temperature, acid and alkali and salt corrosion, without any wetting from metal and slag, and soft lightweight. It?¡¥s widely employed as a high-temperature furnace lining supplies, also as petroleum, chemical lined autoclave.

3. Acid refractory material uses silicon oxide because the principal element and what we frequently use is silica brick and clay brick. Silica brick is siliceous merchandise containing silicon oxide above 93%, and the employed material is silica stone, waste silica brick and so on, whose anti-acid slag has a robust erosion capability, higher load softening temperature, and whose volume will not shrink soon after repeated calcination, as well as a slight expansion.; but it?¡¥s vulnerable to the erosion of simple slag, using a poor thermal shock resistance. The silica brick is primarily utilised in the thermal equipment such as coke oven, glass furnace, acid furnace and so forth. Clay brick makes use of refractory clay because the major raw material, containing 30% to 46% alumina, and belongs to a weak acid refractory and fine heat shock resistance, getting a corrosion resistance against acid slag, so it features a wide range of applications.

4. In specific occasions, the used chrome corundum has high temperature oxide components, such as alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconia, etc., and a few refractory compounds, like carbides, nitrides, borides, silicides and sulfides; and high temperature composite components, such as metal ceramic, higher temperature inorganic coatings and fiber reinforced ceramics. Generally in the market, we are able to typically see Cr2O3?¡éCr2O3 compound, sometimes even Cr2O3 99% and Chrome Oxide Green Powder.