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

The key mineral composition of Chromium corundum is -Al2O3-Cr2O3 strong answer. The secondary mineral composition is actually a small volume of composite spinelle (or composite spinelle -free), and also the refractory bricks whose chromium oxide content material is 1% ~ 30%. There are two kinds: cast chrome corundum brick and sintered corundum brick.

Normally, the chromium corundum brick refers towards the sintered chrome corundum brick. It uses |¨¢-Al2O3 as raw material, becoming added the best amount of chromium oxide powder and fine powder of Chromium corundum clinker, after getting molded and burnt at higher temperature. Chromium oxide content of sintered chrome brick is usually reduce than that of the cast chrome corundum brick. It is possible to also use mud casting technique to have a preparation, uniformly mixing alpha-Al2O3 powder and chromium oxide powder, adding solution adhesive agent and organic bonding agent to create thick mud, even though adding some chromium corundum clinker, employing grouting method to make unfired bricks and burn them. It can be used 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 have for the selection principles of chrome corundum?

1. Basic Refractory uses magnesium Oxide and calcium oxide as the major components, what exactly is frequently utilised is magnesium brick. Magnesia brick containing Magnesium Oxide more than 80% to 85%, obtaining very good resistance around the fundamental 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 equipment and high temperature equipment.

two. Neutral refractory supplies use aluminum oxide, chromium oxide or carbon as principal ingredients. Alumina products containing more than 95% of alumina are a sort of top quality refractory supplies. Chrome brick utilizing chromium oxide as the major component has excellent 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 items, whose coefficient of thermal expansion is very low, getting high thermal conductivity, heat vibration performance, high strength at higher temperature, acid and alkali and salt corrosion, without any wetting from metal and slag, and soft lightweight. It?¡¥s extensively employed as a high-temperature furnace lining materials, at the same time as petroleum, chemical lined autoclave.

three. Acid refractory material utilizes silicon oxide because the primary element and what we typically use is silica brick and clay brick. Silica brick is siliceous products containing silicon oxide above 93%, and the utilized material is silica stone, waste silica brick and so on, whose anti-acid slag includes a robust erosion capability, high load softening temperature, and whose volume doesn't shrink following repeated calcination, as well as a slight expansion.; but it?¡¥s vulnerable towards the erosion of fundamental slag, with a poor thermal shock resistance. The silica brick is primarily employed in the thermal gear such as coke oven, glass furnace, acid furnace and so on. Clay brick uses refractory clay because the main 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 includes a wide selection of applications.

four. In particular occasions, the utilised chrome corundum has high temperature oxide components, like alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconia, and so forth., and a few refractory compounds, such as carbides, nitrides, borides, silicides and sulfides; and high temperature composite supplies, including metal ceramic, higher temperature inorganic coatings and fiber reinforced ceramics. Typically in the marketplace, we can usually see Cr2O3?¡éCr2O3 compound, often even Cr2O3 99% and Chrome Oxide Green Powder.