【頂央】廠家耐火材料鋁礬土耐火骨料鋁礬土【價格，廠家，求購，使用說明】

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【頂央】廠家耐火材料鋁礬土耐火骨料鋁礬土
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頂央廠家**耐火材料鋁礬土耐火骨料鋁礬土??產品介紹
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鋁礬土產品介紹
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? ? ? 上海頂央鋁礬土又稱礬土或鋁土礦，主要成分是氧化鋁，系含有雜質的水合氧化鋁，是一種土狀礦物，白色或灰白色，因含鐵而呈褐黃或淺紅色。密度2.4-2.5g/cm3，硬度13，不透明，質脆，極難熔化，不溶于水，能溶于硫酸、氫氧化鈉溶液，主要用于煉鋁，制耐火材料。
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? ? ? 耐火材料行業所稱的鋁礬土通常是指煅燒后Al2O3>=48、而含Fe2O3較低的高鋁礬土熟料。熟料為灰白淺黃及深灰色，它主要用于高鋁質耐火材料，也可用來制作電熔棕剛玉。高鋁礬土熟料是按AL2O3含量及Fe2O3、TiO2、CaO MgO、K2O Na2O等雜質含量和熟料體積密度與吸水等項指標來分級的。
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耐火材料用鋁礬土技術參數
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<
等級
化學成分
耐火度
體積密度
Al2O3
CaO
Fe2O3
特級
>85
<0.6
<1.4
>1790
>3.6?g/cm3
一級
>80
<0.6
<3.0
>1790
>3.0?g/cm3
二級甲
7080
<0.8
<3.0
>1790
>2.8?g/cm3
二級乙
6070
<0.8
<3.0
>1770
>2.65?g/cm3
三級
5060
<0.8
<2.5
>1770
>2.55?g/cm3
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鋁礬土產品用途
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? ? ? 1、?煉鋁工業--用于國防、航空、汽車、電器、化工、日常生活用品等。
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? ? ? 2、精密鑄造--礬土熟料加工成細粉做成鑄模后精鑄，用于**、**、通訊、儀表、機械及醫療器械部門。
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? ? ? 3、?用于耐火制品--高鋁礬土熟料耐火度高達1780，化學穩定性強、物理性能良好。
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? ? ? 4、硅酸鋁耐火纖維--具有重量輕，耐高溫，熱穩定性好，導熱率低，熱容小和耐機械震動等優點。用于鋼鐵、有色冶金、電子、石油、化工、宇航、原子能、國防等多種工業。它是把高鋁熟料放進融化溫度約為20002200的高溫電弧爐中，經高溫熔化、高壓高速空氣或蒸汽噴吹、冷卻，就成了潔白的“棉花”硅酸鋁耐火纖維。它可壓成纖維毯、板或織成布代替冶煉、化工、玻璃等工業高溫窯爐內襯的耐火磚。消防人員可用耐火纖維布做成衣服。
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? ? ? 5、以鎂砂和礬土熟料為原料，加入適當結合劑，用于澆注盛鋼桶整體桶襯效果甚佳。
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? ? ? 6、制造礬土水泥，研磨材料，陶瓷工業以及化學工業可制鋁的各種化合物。
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The top of the Shanghai central of bauxite, the main component is alumina, hydrated alumina containing impurities, is a kind of clay mineral, white or grey, due to iron and brownish yellow or light red. Density 2.4-2.5g/cm3, hardness of 3 1, opaque, brittle, very difficult to melt, insoluble in water, soluble in sulfuric acid, sodium hydroxide solution, mainly used in aluminum, refractory materials.
1, aluminum industry - for the defense, aviation, automotive, electrical, chemical, daily necessities, etc
2, precision casting, bauxite is processed into fine powder and made into mold, used in military, aerospace, communications, instrumentation, machinery and medical equipment department.
3, used for refractory products -- high alumina bauxite refractory high degree of up to 1780 DEG C, strong chemical stability, good physical properties.
4, the aluminum silicate refractory fiber -- has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, has the advantages of small heat capacity and resistance to mechanical vibration etc For steel, nonferrous metallurgy, electronics, petroleum, chemical, aerospace, atomic energy, defense and other industries. It is the high alumina clinker into the melting temperature of about 2000 2200 degrees of high temperature in the electric arc furnace, the high temperature melting, high pressure air or steam injection, cooling, became a white "cotton" - aluminum silicate refractory fiber. It can be pressed into a fiber blanket, plate or woven into cloth instead of smelting, chemical, glass and other industrial furnace lining refractory brick. Fire fighters can be made of refractory fiber cloth clothes.
In 5, magnesia and bauxite as raw material, adding appropriate binder, used for pouring ladle lining the whole barrel effect.
6, to produce alumina cement, abrasive materials, ceramic industry and chemical industry can be a variety of aluminum compounds.
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