24#、36#优质金刚砂磨料 一级金刚砂
棕刚玉是以是用矾土、碳素材料、铁屑三种原料在电炉中经过融化还原而制得的棕褐色人造刚玉，故为此名。棕刚玉主要化学成份是 AL2O3，其含量在94.5%-97%，另含有少量的Fe，Si，Ti等。用它制成的磨具，适于磨削抗张较高的金属，如各种通用钢材、可锻铸铁、硬青铜等，也可制造高级耐火材料。棕刚玉具有纯度高，结晶好，流动性强，线膨胀系数低，耐腐蚀的特点。经数十家耐火生产企业实践验证，该产品在应用过程中具有不起爆、不粉化、不开裂的特点。尤其是其远高于传统棕刚玉的性价比，更使之成为棕刚玉质耐火材料的最佳骨料和填充料。
Bown fused alumina is made from alumina, carbon materials, scrap iron three kinds of raw materials in electric furnace melting reduction of brown alundum, reason for this name. Brown fused alumina is mainly chemical composition is AL2O3, and its content from 94.5% to 94.5%, the other contains a small amount of Fe, Si, Ti, etc. Use it made of abrasive, suitable for grinding the high tensile metals, such as all kinds of steel, malleable cast iron, hard bronze, etc., also can make advanced refractories. Brown fused alumina with high purity, good crystallization, strong liquidity, low linear expansion coefficient, the characteristics of corrosion resistance. The dozens of refractory production enterprises have proved that the product in the application process has not initiation, not pulverization, not cracking characteristics. Especially its far higher than the traditional brown corundum price, more make it become the best in the brown just the quality of the jade of refractory aggregate and filling material.
棕刚玉理化指标与物理性能
注：F为固结磨具及喷砂用规格
P为涂附磨具用规格
W为微粉，320#即W40
用途 | 规格 | 主要化学成分% | 磁性物% |
Al2O3 | Fe2O3 | SiO2 | TiO2 |
磨料
磨具 | F | 4#—80# | ≥95 | ≤0.3 | ≤1.5 | ≤3.0 | ≤0.05 |
90#—150# | ≥94 | ≤0.03 |
180#—240# | ≥93 | ≤0.3 | ≤1.5 | ≤3.5 | ≤0.02 |
P | 8#—80# | ≥95.0 | ≤0.2 | ≤1.2 | ≤3.0 | ≤0.05 |
100#—150# | ≥94.0 | ≤0.03 |
180#—220# | ≥93.0 | ≤0.3 | ≤1.5 | ≤3.5 | ≤0.02 |
W | 1#-63# | ≥92.5 | ≤0.5 | ≤1.8 | ≤4.0 | — |
耐火
材料 | 段砂 | 0-1mm
1-3mm
3-5mm
5-8mm
8-12mm | ≥95 | ≤0.3 | ≤1.5 | ≤3.0 | — |
25-0mm
10-0mm
50-0mm
30-0mm | ≥95 | ≤0.3 | ≤1.5 | ≤3.0 | — |
细粉 | 180#-0
200#-0
320#-0 | ≥94.5≥93.5 | ≤0.5 | ≤1.5 | ≤3.5 | — |
棕刚玉物理性能
项目 | 指标 |
颜 色 | 深棕（煅烧后深蓝） |
晶形 | 三方晶系 |
硬度（莫氏） | ≥9.0 |
熔点（℃） | 2250 |
最高使用温度（℃） | 1900 |
真密度（g/cm3） | ≥3. 90 |
线膨胀系数（0—1600℃） | 7—9 |
划分等级
棕刚玉主成分是氧化铝，分等级也就用铝含量来区分， 铝含量越低也就硬度越低了。
产品粒度按国际标准以及各国标准生产，可按用户要求粒度进行加工。通用粒度号为 F4~F320，其化学成份视粒度大小而不同。突出的特点是晶体尺寸小耐冲击，因用自磨机 加工破碎，颗粒多为球状颗粒，表面干洁，易于结合剂结合。
rank
Corundum principal component is the alumina, aluminum content hierarchical is used to distinguish, the lower the aluminum content is, the lower the hardness.
Product size according to the international standard and national standard production, granularity processing according to user requirement. Gm grain sizes of the F4 ~ F320, its chemical composition depending on the size of the particle size. Outstanding characteristic is little impact resistance, crystal size in use since the mill processing, particles are spherical particles, the surface dry clean, easy to bond.
使用范围
棕刚玉称作工业的牙齿：主要用在耐火材料，砂轮，喷砂 。
1.喷砂棕刚玉——喷砂磨料硬度适中，堆积密度高，无游离二氧化硅，比重大，韧性好,是理想的“环保”型喷砂材料，广泛应用于铝型材，铜型材玻璃，水洗牛仔服精密模具等领域；
2.自由研磨——研磨级磨料，应用于显像管、光学玻璃、单晶硅、镜片、钟表用玻璃、水晶玻璃、玉器等领域的自由研磨，是国内普遍采用的高级研磨材料；
3.树脂磨具——磨料具有颜色合适、硬度好、有韧性、合适的颗粒断面类型和刃口保持度，应用于树脂磨具，效果理
棕刚玉段砂
想；
4.涂附磨具——磨料是砂纸、纱布等生产厂家的生产原料；
5.棕刚玉功能性填料——主要用于汽车制动件、特种轮胎、特种建筑制品等领可作为修筑高速公路路面、飞机跑道、码头、停车场、工业地坪、体育场地等耐磨材料;
6.过滤介质——是磨料的新型应用领域，采用粒状磨料作过滤床的底层介质，净化饮用水或废水，是国内外新型的水过滤材料，尤其适用于有色金属选矿、石油钻井泥浆加重剂:
Using range
Brown fused alumina called industrial teeth: mainly used in refractory materials, grinding wheel, sand blasting.
1. The sand corundum, sandblasting abrasive hardness is moderate, high packing density, no free silica, than major, good toughness and is the ideal "environmental protection" type sand blasting materials, widely used in aluminum, copper profile glass, washing jeans precision molds, and other fields;
2. The free abrasive, abrasive abrasive, applied to the tube, optical glass, monocrystalline silicon, lenses, clocks with glass, crystal glass, jade in areas such as free grinding, grinding is adopted widely in the domestic advanced materials;
3. The resin abrasive, abrasive has color appropriate, good hardness and toughness, suitable particle cross section type and keeping degree blade, used in resin abrasive effect
Brown corundum sand segment
Want to;
4) is coated with abrasive, abrasive abrasive paper, gauze and other manufacturers of production materials;
5. Brown fused alumina filler - is mainly used for automobile brake parts, special tires, special construction products such as led can be used as building highway pavement, airport runway, docks, car parks, industrial floor, wear-resisting material such as sports venues;
6. Filter medium, is a new kind of application field, abrasive using granular grinding for the bottom of the medium filter bed, purify drinking water or wastewater, is a new type of water filtration materials at home and abroad, especially suitable for non-ferrous metal processing, oil drilling mud weighting agent .
金刚砂的冶炼工艺
冶炼方法：
刚玉冶炼一般有三种方法：
1. 流放发：连续生产，自动化程度高，但投资大，结构复杂，适合于大功率冶炼。
2. 倾倒法：连续生产，机械化程度高，投资较小，生产效率好，目前使用普遍的一种方法。
3. 固定法(熔块法)：间断生产，机械化程度低，但投资小，设备简单，工艺方便，是目前小型磨料厂进行刚玉冶炼的主要方法。