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

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

Generally, the chromium corundum brick refers towards the sintered chrome corundum brick. It uses |¨¢-Al2O3 as raw material, becoming added the correct volume of chromium oxide powder and fine powder of Chromium corundum clinker, right after becoming molded and burnt at high temperature. Chromium oxide content of sintered chrome brick is usually reduce than that of the cast chrome corundum brick. You are able to also use mud casting method to possess a preparation, uniformly mixing alpha-Al2O3 powder and chromium oxide powder, adding remedy adhesive agent and organic bonding agent to produce thick mud, even though adding some chromium corundum clinker, employing grouting approach to produce unfired bricks and burn them. It may be employed as 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, and so forth.

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

1. Standard Refractory makes use of magnesium Oxide and calcium oxide as the main components, what's commonly employed is magnesium brick. Magnesia brick containing Magnesium Oxide more than 80% to 85%, possessing great resistance around the fundamental slag and iron slag, whose refractoriness is larger 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 higher temperature gear.

two. Neutral refractory materials use aluminum oxide, chromium oxide or carbon as primary ingredients. Alumina goods containing more than 95% of alumina are a sort of top quality refractory materials. Chrome brick using chromium oxide because the major 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 items, whose coefficient of thermal expansion is extremely low, having high thermal conductivity, heat vibration overall performance, high strength at higher 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 components, too as petroleum, chemical lined autoclave.

three. Acid refractory material uses silicon oxide as the primary element and what we frequently use is silica brick and clay brick. Silica brick is siliceous goods containing silicon oxide above 93%, and also the utilised material is silica stone, waste silica brick and so on, whose anti-acid slag has a strong erosion ability, high load softening temperature, and whose volume doesn't shrink soon after repeated calcination, as well as a slight expansion.; but it?¡¥s vulnerable towards the erosion of simple slag, having a poor thermal shock resistance. The silica brick is mainly utilized in the thermal equipment including coke oven, glass furnace, acid furnace etc. Clay brick uses refractory clay as the principal 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 includes a wide array of applications.

4. In particular occasions, the utilised chrome corundum has higher temperature oxide components, such as alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconia, etc., and some refractory compounds, like carbides, nitrides, borides, silicides and sulfides; and high temperature composite components, like metal ceramic, high temperature inorganic coatings and fiber reinforced ceramics. Normally within the market, we can often see Cr2O3?¡éCr2O3 compound, sometimes even Cr2O3 99% and Chrome Oxide Green Powder.