As one of the important equipment for nickel-iron smelting, the rotary kiln determines the quality of nickel-iron smelting. During the production process, the rotary kiln operates continuously, which not only requires the refractory lining to have good scouring resistance, slag erosion resistance, high-temperature volume stability, refractory, thermal shock stability and other characteristics, but also requires the refractory lining to be energy-saving and environmentally friendly. However, the existing refractory castables for making rotary kiln linings cannot achieve the above-mentioned performance. After a long period of field investigation and research, the inventor believes that it is necessary to improve the existing technology to solve the above-mentioned technical problems. The technology realizes a refractory castable that is energy-saving and environmentally friendly, has good construction performance, strong scouring resistance, good high-temperature volume stability, good thermal shock stability and excellent slag erosion resistance. The preparation method and technical solution realize: an environmentally friendly refractory castable for nickel-iron rotary kiln.
The main function of the nickel-iron rotary kiln is that the domestic smelting of laterite nickel ore mostly uses rotary kilns to heat and burn the nickel-iron raw material laterite (mainly including preheating of the raw material laterite, removing bound water and pre-reduction). In the existing technology, the rotary kiln is composed of a kiln shell and a lining refractory material.
Products Description
The production process of the kiln lining material in the high temperature zone of the nickel-iron rotary kiln includes aggregate crushing, aggregate screening, powder fine grinding, batching and mixing. Beneficial effects: By introducing the combination technology of micro-powder and ultra-micro-powder, the sintering temperature is controlled and the strength is increased; high strength and wear resistance, the quality of the filling part of the material between the aggregates is improved, and the matrix and the aggregate in the castable can achieve synchronous wear; good thermal shock stability and strong thermal shock resistance solve the problem of crack expansion inside the material.
The high-strength castable for the nickel-iron rotary kiln has the characteristics of convenient construction, good anti-seepage effect, high strength, wear resistance, and long life. It has a good anti-seepage effect on Zn, Cu, Mg, and Al in aluminum alloys. It is an essential material for equipment such as aluminum melting furnaces, insulation furnaces, and aluminum flow troughs.
Performance table
Physicochemical indexes of high-strength casting for nickel-iron rotary kiln
|
project |
HX-HQ60-X |
HX-HQ65-X |
HX-HQ68-X |
|
|
Al2O3(%): ≥ |
60 |
65 |
68 |
|
|
Bulk density (g/cm3): ≥ |
110°C x16h |
2.40 |
2.45 |
2.50 |
|
Compressive strength (MPa)： ≥ |
110°C x16h |
55 |
60 |
60 |
|
1350°C x3h |
70 |
75 |
75 |
|
|
Flexural strength (MPa)： ≥ |
110°C x16h |
8 |
9 |
9 |
|
1350°C x3h |
9 |
10 |
10 |
|
|
Line change rate (%)： |
1300°C x3h |
0~-0.5 |
0~-0.5 |
0~-0.5 |
|
Long-term use temperature (℃) |
1350 |
|||
Hot Tags: high-strength castable for nickel-iron rotary kiln, China high-strength castable for nickel-iron rotary kiln manufacturers, suppliers, factory, Kiln Mouth Refractory Castables