【鼎晟】不定形及定形高纯耐火材料专用优质预合成尖晶石
镁铝尖晶石采用Al203含量76%以上的优质矾土和MgO含量95%以上的优质轻烧镁粉，经过多级均化工艺，在超高温隧道窑中经1800°C以上高温烧结而成，体积密度大，矿物相含量高，晶粒发育良好，结构均匀，质量稳定。镁铝尖晶石具有良好的抗侵蚀，腐蚀、剥落能力强，抗渣性能好，抗磨蚀能力，热震稳定性好，耐高温等性能特点。是生产水泥回转窑高温带用镁铝尖晶石砖、钢包衬砖、钢包浇注料等耐火产品的理想原料。镁铝尖晶石广泛用于耐火材料、钢铁冶炼，水泥回转窑及玻璃工业窑炉上。
具有良好的抗侵蚀能力、抗磨蚀能力，热震稳定性好。其最主要的用途：一是代替镁铬砂制造镁铝尖晶石砖用于水泥回转窑，不但避免了铬公害，而且具有良好的抗剥落性；二是用于制作钢包浇注料，大大提高钢板衬的抗侵蚀能力。使其广泛应用于炼钢用耐火材料。优质预合成尖晶石的制取为不定形及定形高纯耐火材料的生产提供了新的原料
一、按生产工艺或方法分：烧结铝镁尖晶石（烧结尖晶石）和电熔铝镁尖晶石（电熔尖晶石）。
二、按生产原料可以划分：铝矾土基铝镁尖晶石与氧化铝基铝镁尖晶石（烧结或电熔）。
1、铝矾土基烧结铝镁尖晶石
铝矾土基烧结铝镁尖晶石的生产工艺和方法：
铝矾土基烧结铝镁尖晶石才有AL2O3含量76%以上的优质铝矾土和MgO含量95%以上的优质轻烧镁粉，经过多级均化工艺，在超高温隧道窑中经1800℃以上高温烧结而成。
铝矾土基烧结铝镁尖晶石的特点与应用：
铝矾土基烧结铝镁尖晶石具有良好的抗侵蚀、抗腐蚀、抗剥落能力强，抗渣性能好，抗磨蚀能力强，热稳定性好。耐高温等性能特点。是生产水泥回转窑高温带用铝镁尖晶石砖、钢包衬砖、钢包浇注料等耐火材料的理想原料。铝镁尖晶石广泛用于耐火材料、钢铁冶炼、水泥回转窑及玻璃工业窑炉上。
铝矾土基烧结铝镁尖晶石的性能与作用：
铝镁尖晶石具有良好的抗侵蚀能力、抗磨蚀能力、热震稳定性好。其主要的用途：一是代替镁铬砂制造铝镁尖晶石砖用于水泥回转窑，不但避免了铬公害，而且具有良好的抗剥落性；二是铝镁尖晶石用于制作钢包浇注料，大大提高钢板衬的抗侵蚀能力。使其广泛应用于炼钢用耐火材料。优质预合成尖晶石的制取为不定形及定形高纯耐火材料的生产提供了新的原料。
烧结尖晶石的优点：
该工艺是一个连续的陶瓷化过程，控制窑中给料速度和均衡的温度分布，产生非常均匀的晶体尺寸为30-80μm及低气孔率（3%）的产品。
物理化学理化指标：
项目 | Al2O3% | MgO% | SiO2% | 体密g/cm3 | 气孔率% | 尖晶石 % | 硅酸盐% |
指标 | 56-62 | 28-32 | <4.0 | <3.0 | <9.0 | 85-90 | 10 |
2、【氧化铝基电熔铝镁尖晶石】：
氧化铝基电熔铝镁尖晶石的生产工艺与方法：
氧化铝基电熔铝镁尖晶石是以纯度≥98.5%的轻烧氧化镁并配入适量的高纯菱镁矿（MgO>45.55%)等做配合料。在电弧炉内经高温冶炼而成，可加工成不同规格的颗粒骨料和尖晶石细粉。
氧化铝基电熔铝镁尖晶石的性能与应用:
氧化铝基电熔铝镁尖晶石具有耐高温、体密大、吸水率低、热膨胀系数小、热稳定性好、抗侵蚀能力强的特点。是制造铸滑板、水口砖、钢包亲砖和平炉炉砖的理想材料，铝镁尖晶石制品的高温力学性能良好，也是大型水泥窑、中性水泥窑过渡带亲砖、耐火浇注料及高中窑具用的基本原料。广泛用于钢铁冶炼、水泥回转窑级玻璃工业窑炉上。
氧化铝基电熔铝镁尖晶石的理化指标:
规格性能 | MA-70 | MA-75 |
砂＞0.1mm | 粉≤0.1mm | 砂＞0.1mm | 粉≤0.1mm |
化学成份 | Al2O3% ≥ | 67-75 | 67-75 | 74-78 | 74-78 |
SiO2% ≤ | 0.4 | 0.4 | 0.6 | 0.6 |
Fe2O3% ≤ | 0.5 | 0.5 | 0.25 | 0.3 |
MgO%≤ | 23-31 | 23-31 | 21-25 | 21-25 |
ＣaＯ%≤ | 0.65 | 0.65 | 0.4 | 0.4 |
物理性能 | 磁性物% ≤ | 0.05 | 0.1 | 0.05 | 0.1 |
显气孔率%≤ | 5.0 | 3.0 |
体积密度g/cm3≥ | 3.30 | 3.30 |
电熔尖晶石供应规格：（mm） | 尖晶石颗粒： 0-1，1-3，3-5，5-8 | 细粉：0-200目或0-320目 |
规格性能 | MA-70 | MA-65 |
砂
＞0.1mm | 粉
≤0.1mm | 砂
＞0.1mm | 粉
≤0.1mm |
化学成份 | Al2O3% ≥ | 67-75 | 67-75 | 64-68 | 64-68 |
SiO2% ≤ | 0.4 | 0.4 | 0.6 | 0.6 |
Fe2O3% ≤ | 0.5 | 0.5 | 0.25 | 0.3 |
MgO%≤ | 23-31 | 23-31 | 31-35 | 3135 |
物理性能 | 磁性物% ≤ | 0.05 | 0.1 | 0.05 | 0.1 |
显气孔率%≤ | 5.0 | 3.0 |
体积密度g/cm3≥ | 3.30 | 3.30 |
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英文说明：
Magnesium aluminate spinel using Al203 content more than 76% of the high quality bauxite and MgO style content more than 95% of the high quality light burning magnesium powder, through multi-stage homogenization process, hitches in ultra high temperature tunnel kiln above 1800 ° C high temperature sintering, volume density, high content of mineral phases, grain growth is good, uniform structure, quality and stability.Magnesium aluminate spinel has good erosion resistance, strong corrosion, peeling, good slag resistance, abrasion resistance, good thermal shock resistance, high temperature resistant performance characteristics, etc.Is the production of cement rotary kiln thermal belt with magnesium aluminate spinel bricks, ladle lining brick, ladle castable refractory products such as the ideal raw material.Magnesium aluminate spinel is widely used in refractory material, steel smelting, cement rotary kiln and glass kiln.
Has a good erosion resistance, abrasion resistance, good thermal shock resistance.Its main use: one is substituting magnesite chrome sand manufacture magnesium aluminate spinel brick used in cement rotary kiln, not only avoid the chromium pollution, but also has good resistance to spalling;2 it is used to make ladle castable, greatly improve the erosion resistance of steel lining.Make it widely used in steelmaking with refractory material.High quality of preparing for amorphous synthetic spinel and setting high purity of refractory production provides a new raw material
A, according to the production process or method points: sintering alumina magnesia spinel (sintered spinel) and fused magnesium aluminium spinel, fused spinel).
Second, according to the production of raw materials can be divided into: bauxite alumina magnesia spinel with alumina aluminum magnesium spinel (sintered or fused).
1, bauxite sintering alumina magnesia spinel
Production technology of bauxite sintering aluminum magnesium spinel and methods:
Bauxite sintering aluminum magnesium spinel is AL2O3 content more than 76% of the high quality bauxite and MgO style content more than 95% of the high quality light burning magnesium powder, through multi-stage homogenization process, hitches in ultra high temperature tunnel kiln is above 1800 ℃ high temperature sintering.
The characteristics of the bauxite sintering aluminum magnesium spinel and application:
Bauxite sintering aluminum magnesium spinel has good erosion resistance, corrosion resistance, spalling resistance capability is strong, good slag resistance, abrasion resistance, good thermal stability.High temperature resistance and other characteristics.Is the production of cement rotary kiln thermal belt with alumina magnesia spinel bricks, ladle lining brick, ladle castable refractory materials such as the ideal raw material.Magnesium aluminum spinel is widely used in refractory material, steel smelting, cement rotary kiln and glass kiln.
The performance of the bauxite sintering aluminum magnesium spinel and function:
Magnesium aluminium spinel has good erosion resistance, abrasion resistance, good thermal shock resistance.Its main purposes: one is substituting magnesite chrome sand manufacture alumina magnesia spinel brick used in cement rotary kiln, not only avoid the chromium pollution, but also has good resistance to spalling;Second, magnesium aluminum spinel used in ladle castable, greatly improve the erosion resistance of steel lining.Make it widely used in steelmaking with refractory material.High quality of preparing for amorphous synthetic spinel and setting high purity of refractory production provides a new raw material.
The advantages of the sintered spinel:
This process is a continuous process of pottery and porcelain, control the temperature of the furnace feeding speed and the equilibrium distribution, have very uniform crystal size of 30-80 (including m and low porosity (3%) of the product.
Physical and chemical physical and chemical indicators:
2, the alumina base fused alumina magnesia spinel 】 :
Oxide production technology of fused alumina magnesia spinel and methods:
Alumina base fused alumina magnesia spinel is a purity of 98.5% or more light burned magnesia and distribution into the right amount of high purity magnesite (MgO style > 45.55%) such as mixtures.In the Canon of high temperature smelting electric arc furnace, and can be processed into different specifications and spinel powder particles of aggregate.
Alumina base properties and the application of the fused alumina magnesia spinel:
Alumina base fused alumina magnesia spinel is high temperature resistant, dense large, bibulous rate is low, small thermal expansion coefficient, good thermal stability, strong ability to resist erosion characteristics.Is made of casting skateboard, nozzle bricks, ladle brick and brick is the ideal material of open hearth furnace, magnesium aluminum spinel products of high temperature mechanical performance is good, is also a large cement kiln, neutral transition zone close brick, refractory pouring cement kiln and the basic materials of kiln furniture in high school.Widely used in iron and steel smelting, glass kiln cement rotary kiln level.
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