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

The primary mineral composition of Chromium corundum is -Al2O3-Cr2O3 strong answer. The secondary mineral composition is a modest quantity of composite spinelle (or composite spinelle -free), and the refractory bricks whose chromium oxide content material is 1% ~ 30%. You'll find two sorts: cast chrome corundum brick and sintered corundum brick.

Normally, the chromium corundum brick refers towards the sintered chrome corundum brick. It makes use of |¨¢-Al2O3 as raw material, being added the proper volume of chromium oxide powder and fine powder of Chromium corundum clinker, right after getting molded and burnt at high temperature. Chromium oxide content of sintered chrome brick is normally lower than that of the cast chrome corundum brick. You can also use mud casting technique 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, even though adding some chromium corundum clinker, employing grouting approach to produce unfired bricks and burn them. It can be used as the glass furnace lining, plate brick of wire drawing glass flow liquid hole cover and employed 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. Basic Refractory uses magnesium Oxide and calcium oxide because the major elements, what's frequently employed is magnesium brick. Magnesia brick containing Magnesium Oxide greater than 80% to 85%, having good resistance on 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 gear and high temperature equipment.

two. Neutral refractory supplies use aluminum oxide, chromium oxide or carbon as main ingredients. Alumina goods containing more than 95% of alumina are a type of high quality refractory supplies. Chrome brick employing chromium oxide because the main component has excellent 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 goods, whose coefficient of thermal expansion is extremely low, possessing high thermal conductivity, heat vibration functionality, higher strength at high temperature, acid and alkali and salt corrosion, without any wetting from metal and slag, and soft lightweight. It?¡¥s widely utilized as a high-temperature furnace lining materials, too as petroleum, chemical lined autoclave.

three. Acid refractory material makes use of silicon oxide as the main component and what we typically use is silica brick and clay brick. Silica brick is siliceous items containing silicon oxide above 93%, and also the utilised material is silica stone, waste silica brick and so on, whose anti-acid slag includes a sturdy erosion capability, higher load softening temperature, and whose volume doesn't shrink following 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 mostly utilised inside the thermal gear like coke oven, glass furnace, acid furnace etc. 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, possessing a corrosion resistance against acid slag, so it has a wide selection of applications.

four. In special occasions, the used chrome corundum has higher temperature oxide supplies, such as alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconia, etc., and some refractory compounds, for example carbides, nitrides, borides, silicides and sulfides; and high temperature composite supplies, like metal ceramic, higher temperature inorganic coatings and fiber reinforced ceramics. Generally within the industry, we can often see Cr2O3?¡éCr2O3 compound, occasionally even Cr2O3 99% and Chrome Oxide Green Powder.