黑刚玉又名低铝刚玉，主要原料是三氧化二铝（AI2O3）含量为7080，含较多的氧化硅和氧化钛等杂质，呈黑色的一种刚玉。是于电弧炉中，将铝矾土熔炼而制得的一种以α- Al2O3 和铁尖晶石为主矿相的灰黑色结晶体，其特点是Al2O3 含量较低，并有一定量的Fe2O3（10左右）存在，因而具有硬底适中、韧性高、耐高温、热态性能温定的特点。多用于自由研磨，如制品电镀前的打磨工粗磨，主要用于不锈钢，金属制品，光学玻璃，竹木制品的抛光和喷砂，又是制造树脂砂轮，切割片， 的新颖磨料。

Black corundum and low aluminum corundum, the main raw material is 3 oxidation 2 aluminium (AI2O3) content is 70 70, containing more silicon oxide and titanium oxide impurities, such as a kind of black corundum. In electric arc furnace, bauxite made by melting a is given priority to with alpha Al2O3 and spinel mineral phase - colored crystals, its characteristic is Al2O3 content is lower, and has a certain amount of Fe2O3 (10), thus has moderate hard ground, high toughness, high temperature resistant, the characteristics of the thermal state performance is steady. More for free grinding, such as the beat of the products before electroplating grinder coarse grinding, it is mainly used for stainless steel, metal products, optical glass, bamboo and wood products polishing and sanding, making resin grinding wheel, cutting slices, gauze of new abrasive.

       黑刚玉的冶炼方法与棕刚玉相同，是以三水铝矾土为原料，加少量还原剂，经溶炼而成，其耗电量约为棕刚玉的三分之二。呈黑色，三方晶体，主要化学成分：Al2O3不低于77，SiO2含量为1012，Fe2O3含量为710，TiO2约为3，比重不小于3.61，硬度：莫氏9.0，熔点：2050，真密度＞3.50g/cm3，线膨胀系数（0-1600°）：7-9，使用温度：1850。

       黑刚玉砂硬度适中，其韧性较大耐磨棱角锋利，自锐性强，磨削是发热量少，抛光加工工件洁度高，其抛光性能非常好，黑刚玉硬度高、韧性大，刚柔相济，耐磨耐用；其粘结性和亲水性好，便于上磨盘；磨削时堵塞少，发热少，工件不会 ；自锐性强，工效高，且加工面无划痕，抛光洁度高；比棕刚玉抛光能力提高一倍以上，抛光洁度提高很多。

Black corundum smelting method is the same as the brown fused alumina, in sanshui bauxite as raw material, add a small amount of reducing agent, the smelting, its power consumption is about two-thirds of the brown fused alumina. Black, three-way crystal, main chemical composition: Al2O3 is not less than 77, SiO2 content is 10 12, Fe2O3 content is 7-10, TiO2 is about 3, and the proportion is not less than 3.61. Hardness: Morse 9.0, melting point: 2050 , true density > 3.50 g/cm3. The linear expansion coefficient (0-1600 °) : 7-9. Temperature: 1850 .

Black corundum sand hardness is moderate, the toughness is bigger wear-resisting sharp edges and corners, the sharpness is strong, grinding is less calorific value, high pure degree of polishing machining, the polishing performance is very good, black corundum, high hardness and great toughness, flexibility, wear-resisting and durable; It is cohesive and hydrophilic, and it is easy to make the mill. Less congestion, less heat, no burns; Self-sharpness, high efficiency, and no scratches on the surface of the processing surface. More than double the polishing ability of the brown alumina jade, the polishing degree is improved a lot.

       黑刚玉磨料适用于不锈钢，金属制品电镀前底面抛光和喷沙，它适用于玻璃、竹木、石材等制品的磨削和抛光。黑刚玉广泛应用于餐具抛光行业，电镀前底面抛光 行业，金属表面处理行业，玻璃制品行业，铝制品和不锈钢的抛光，又是制造树脂砂轮，切割片，砂布的新凝材料，目前，广泛地应用于不锈钢餐厨具，灯具灯饰摩托车零件，汽车配件等中等硬度材料的精细抛光。

       1、自由研磨，如金属零件电镀前底面抛光、铝制品、自行车、摩托车、缝纫机、钟表零部件。

       2、灯饰、塑胶及五金工具等的抛光，亦适用于喷砂（除锈、玻璃喷花）。

       3、加工材料，制造树脂切割片、角磨片和涂附磨具等。

       4、黑刚玉粒度砂和微粉特别适合于不锈钢工件的研磨抛光及油石、研磨膏的制造。

       5、黑刚玉段砂更是防滑路面和煤矿坑下仓储的可用材料。

巩义市久久抛光磨料厂

销 售 经 理 ：苏晨丹

电      话：

手      机：

Q       Q：1985802059

传      真：

地      址：河南省巩义市涉村镇西涉村

公 司 主 页：*

Gongyi is a long time polishing and polishing mill

The sales manager: su chen-dan

Telephone:

Hand machine:

Q: 1985802059

True:

Site: the village in gongyi, henan province

Main page: *

巩义市久久抛光磨料厂

销 售 经 理 ：苏晨丹

电      话：

手      机：

Q       Q：1985802059

传      真：

地      址：河南省巩义市涉村镇西涉村

公 司 主 页：*

Gongyi is a long time polishing and polishing mill

The sales manager: su chen-dan

Telephone:

Hand machine:

Q: 1985802059

True:

Site: the village in gongyi, henan province

Main page: *