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白剛玉是以優(yōu)質(zhì)鋁氧化粉為原料，經(jīng)電熔提煉結(jié)晶而成， 純度高、自銳性好、耐酸堿腐蝕、耐高溫、熱態(tài)性能穩(wěn)定它硬度略高于棕剛玉，韌性稍低，純度高、自銳性好、磨削能力強(qiáng)、發(fā)熱量小、效率高、耐酸堿腐蝕、耐高溫?zé)岱�(wěn)定性好。用其制成磨具，適用于磨削高碳鋼、高速鋼及不銹鋼等細(xì)粒度磨料還可以用于精密鑄造和高級(jí)耐火材料。

White fused alumina was made from the high quality alumina by melting above 2000 in the electric arc furnace and cooling. It is white with the main crystal phase alpha-Al2O3.The white alumina produced in titling electric arc furnace has the advantage of high bulk density and low porosity and the volume stability and thermal shock resistance can be improved.

棕剛玉是以鋁礬土、無(wú)煙煤為主要原料，在2000度以上電弧爐內(nèi)經(jīng)高溫冶煉而成，用它制成的磨具，適于磨削抗張較高（鋼材、可鍛鑄鐵、應(yīng)青銅等）的金屬，適用于制造陶瓷、樹脂高固結(jié)磨具以及研磨、拋光、噴砂、精密鑄造等，也可制造高級(jí)耐火材料。棕剛玉具有純度高，結(jié)晶好，流動(dòng)性強(qiáng)，線膨脹系數(shù)低，耐腐蝕、耐高溫、高強(qiáng)度等特點(diǎn)。

Brown fused alumina is made of bauxite, anthracite coal, and smelted in electric-arc furnace of high temperature more than 2000 degrees. Abrasives tools made by brown fused alumina are suitable for metal with high tensile(like: steel, malleable iron, bronze etc). Suitable for product high consolidation abrasive, and suitable for grinding, polishing, blasting, precision casting etc. brown fused alumina is also used for refractory material.