| 耐火温度：1770～2000℃ ℃ | 产地：河南 | 品牌：满堂红 |
| 产品类别：铝矾土 | 材质：铝矾土 | 等级：一级 |
| 断裂伸长率：5% | 抗弯强度：98% | 抗压强度：98% |
| 拉伸强度：10% | 使用温度：1800度 | 撕裂强度：2% |
| 芯材：铝矾土 | 形态：层状 | 形状：片状 |
供应耐火水泥专用铝矾土
铝矾土简介：
铝矾土（aluminous soil；bauxite）又称矾土或铝土矿，主要成分是氧化铝，系含有杂质的水合氧化铝，是一种土状矿物。白色或灰白色，因含铁而呈褐黄或浅红色。密度3.9～4g/cm3，硬度1～3，不透明，质脆。极难熔化。不溶于水，能溶于硫酸、氢氧化钠溶液。主要用于炼铝，制耐火材料。
耐火材料行业所称的铝矾土通常是指煅烧后Al2O3>=48%、而含Fe2O3较低的铝土矿，高铝矾土熟料是经过煅烧的铝矾土矿。熟料为灰白浅黄及深灰色，它主要用于高铝质耐火材料，也可用来制作电熔棕刚玉。
铝矾土划分级别的标准：
高铝矾土熟料是按AL2O3含量及Fe2O3、TiO2、Ca O+ Mg O、K2O+Na2O等杂质含量和熟料体积密度与吸水等项指标来分级的。
铝矾土的种类、级别：
(1)生矾土，即矾土原矿石(天然沉积岩类)。
(2)熟矾土，将生矾土经高温煅烧后(1200～1700℃)称为熟矾土。
铝矾土煅烧后，其物化性能变化如下：
1、外观由原来的灰、深灰、灰黄、灰白、红黄等颜色，转变为白色、米黄色、棕红色、蓝色，而蓝色随着含铝量增高而加深。原来的土状光泽变为刚玉光泽或油脂光泽，有时表面出现 轻微的熔化石或裂缝；
2、氧化铝含量增加11～13%,其他杂质增加量微；
3、体积缩小23%左右；
4、烧失量为14.5%左右；
5、由一水型铝石或一水铝—高岭石型，转变为人造刚玉、莫来石及少量玻璃相；
6、硬度由原来的1～3增加到8以上；
7、体积密度由原来的2.5g/cm3左右增加至2.8～3g/cm3以上；
8、结晶水、结构水、附着水全部溢出；
9、结构上由疏、松、软变为致密坚硬；
10、吸水性降低；抗渣性、抗碱性增强；
12.强度增加；
13.渗透性减少；
14.气化率减少；
15.易挥发成分、易燃烧成分、土气味完全消失；
16. 耐火度达到1780℃以上。
(3)熟矾土按煅烧窑炉不同分为：
①竖炉熟矾土(SHAFT KILN BAUXITE)；②转炉熟矾土(ROTARY KILN BAUXITE)；③倒焰窑矾土(ROUND KILN BAUXITE)。
(4)熟矾土按不同用途分为：
①耐火级矾土；②研磨级矾土；③电焊级矾土。
铝矾土检验指标：
(1)高铝矾土(含Al2O385%以上)要求检验项目：
Al2O3：耐火级85～87%以上，研磨级86%以上，电焊级87%以上；SiO2：耐火级6～7% 以下，研磨级5～6%以下；Fe2O3：耐火级1.6～2%以下，耐磨级2%以下；TiO2:耐火级3.5～4%以下，研磨级4～4.5%以下；K2O+Na2O+CaO+MgO：耐火级0.5～1%以下，研磨级0.5～1%以下。电焊级矾土有的还要求检验磷、硫、锰等项目。
B.D.(体积密度)：耐火级3.10～3.20g/cm3以上，研磨级、电焊级不要求检验该项目。
L.O.I(烧失量)：均为0.3%以下。
粒度：按买方要求制定，一般有自然块、100mm、50mm、25mm、10mm、5mm、3mm、1mm等。
水份：一般0.5～1.5%之间，超过扣重或其它条款。
(2)一般矾土(含Al2O380%以上)要求检验项目：
耐火级：不小于Al2O3:80%；Fe2O3:不大于2%；B.D:不小于2.8g/cm3；粒度及水份按买方要求制定。
另外，还有将合同中粒度签定为细粉的，一般要求在100～200目之间，通过率85～*** 。
(3)铁矾土要求检验项目：
Al2O3:不小于80%；Fe2O3:4～10%；TiO2:不大于4%；SiO2:不大于7%，粒度：按买方要求制定。
(4)生矾土要求检验项目：?
Al2O3:70～73%；Fe2O3:1.5%左右；TiO2:不大于4%；SiO2:不大于6%；烧失量 :14～15%；K2O+Na2O+CaO+MgO=0.5～1%。
Bauxite introduction:
Bauxite (aluminous soil; bauxite) also called alumina or bauxite, the main component is alumina, system contains impurities hydrated alumina, it is a kind of earthy mineral. White or grey, for iron and a brown yellow or light red. Density 3.9 ~ 4 g/cm3, hardness 1 ~ 3, not transparent, is very brittle. Very difficult to melt. Insoluble in water, soluble in sulfuric acid, sodium hydroxide solution. Mainly used for aluminum smelting, system refractory material.
Refractory industry "bauxite is usually refers to after calcination Al2O3 > = 48%, and contain Fe2O3 lower bauxite, high bauxite clinker is after calcined bauxite ore. Clinker for yellow grey and dark grey, it is mainly used for high aluminum refractory material, can also be used to make fused corundum.
Bauxite division level standard:
High bauxite clinker is to press AL2O3 content and Fe2O3, TiO2, Ca O + Mg O, K2O + Na2O impurity content and clinker volume density and water absorption and indicators to the classification.
Bauxite types, level:
(1) raw bauxite, namely alumina raw ore (natural sedimentary rock class).
(2) the calcined bauxite, will be born by the high temperature calcined alumina after (1200 ~ 1700 ℃) called calcined bauxite.
After calcined bauxite, its physicochemical properties change as follows:
1, appearance of the original grey, dark gray, gray, red, with the color such as yellow, into white, beige, brownish red, blue, and blue with aluminized quantity increase and deepen. The original earthy luster into corundum gloss or oily luster, sometimes surface appear slightly fuse fossil or crack;
2, alumina content increased 11 ~ 13%, other impurity gain micro;
3, volume reduced 23% or so,
4, ignition loss for 14.5%;
5, the water type LvShi or monohydrate aluminum - kaolinite type, into artificial corundum, mullite and a small amount of glass phase;
6, hardness by original 1 ~ 3 increased to more than eight;
7, bulk density from 2.5 g/cm3 increased to about 2.8 ~ 3 g/cm3 above;
8, water of crystallization, the structure of water, attached water all overflow;
9, structure by drainage, pine, soft into dense hard;
10, reduce water;
Slag resistance, alkali resistance increase,
12. Strength increase;
13. Permeability reduced;
14. The rate of gasification reduced;
15. Volatile component, easy combustion composition, soil smell disappear completely;
16. Refractory degrees to 1780 ℃ above.
(3) calcined bauxite by calcining kiln different is divided into:
(1) the SHAFT furnace calcined BAUXITE (SHAFT KILN BAUXITE); (2) converter calcined BAUXITE (ROTARY KILN BAUXITE); (3) fall flame KILN alumina (ROUND KILN BAUXITE).
(4) calcined bauxite according to different purpose is divided into:
(1) refractory grade alumina; (2) the grinding grade alumina; (3) welding grade alumina.
6. Test index
(1) high bauxite (including Al2O385 % above) request inspection items:
Al2O3: refractory level 85 ~ 87% above, ground level above 86%, welding level above 87%; SiO2: refractory grade 6 ~ 7% and the grinding level 5 ~ 6% below; Fe2O3: refractory grade 1.6 ~ 2% below, wear-resisting level below 2%; TiO2: refractory grade 3.5 ~ 4% and the grinding grade 4 ~ 4.5% below; K2O + Na2O + CaO + MgO: refractory grade 0.5 ~ 1% and the grinding level below 0.5 ~ 1%. Welding grade alumina some also requires inspection phosphorus, sulfur, manganese projects.
B.D. (bulk density) : refractory grade 3.10 ~ 3.20 g/cm3, above ground level, welding level does not require testing the project.
L.O.I (ignition loss) : all is below 0.3%.
Size: according to the purchaser's demand formulation, usually have a natural block, 100 mm, fifty mm, 25 mm, 10 mm, 5 mm, 3 mm, 1 mm, etc.
Water: generally between 0.5 ~ 1.5%, more than button heavy or other terms.
(2) general alumina (including Al2O380 % above) request inspection items:
Refractory level: not less than 80%, Al2O3: Fe2O3: no more than 2%; B.D: not less than 2.8 g/cm3; Particle size and water according to the purchaser's called for.
In addition, still have the contract signed size for fine powder, general requirements in 100 ~ 200 mesh, percent of pass between 85 ~ 90%.
(3) bauxite request inspection items:
Al2O3: no less than 80%; Fe2O3:4 ~ 10%; TiO2: no more than 4%; SiO2: no more than 7%, size: according to buyer's request, make out.
(4) raw bauxite request inspection item: ?
Al2O3:70 ~ 73%; Fe2O3:1.5%; TiO2: no more than 4%; SiO2: no more than 6%; Ignition loss: 14 ~ 15%; K2O + Na2O + CaO + MgO = 0.5 ~ 1%.
产品图片：
联系方式：
巩义市满堂红磨料磨具厂
联系人：张娜娜
电话：18236952562
座机：0371-60329929
传真：0371-60329622
QQ：2819618871
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