Self-flow type large-area batching mix for revolving furnace and methods for preparing and using self-flow type large-area mix
A repair material and converter technology, applied in the field of refractory materials, can solve the problems of poor resistance to molten steel erosion and steel slag erosion, affecting material fluidity, material compactness, and poor high-temperature sintering performance, and achieves low production costs and excellent preparation methods. Practical, the effect of improving the erosion resistance of molten steel
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Embodiment 1
[0030] In this example, the parts by weight of the components of the self-flowing large surface repair material for converters are as follows: 70 aggregates, 20 fine powders, 5 micropowders, 5 binders, 5 burning accelerators, 0.2 explosion-proof agents, and 2 thickeners .
[0031] The aggregates include: 3mm2 Micropowder and active α-Al 2 o 3 Mixture of micropowders, where SiO 2 Micropowder, SiO 2 Content≥92%, particle size≤45μm, α-Al 2 o 3 In micropowder, α-Al 2 o 3 Content ≥ 99%, particle size ≤ 2μm. The binding agent is sodium hexametaphosphate. The sintering accelerator is a mixture of synthetic magnesia-calcium-iron sand and forsterite, among which, the content of MgO in the synthetic magnesia-calcium-iron sand is 65-74%, the content of CaO: 20-23%, and the content of Fe 2 o 3Content: 3~8%, MgO content of forsterite ≥40%, SiO 2 Content ≤ 42%. The explosion-proof agent is polypropylene fiber. The thickener is a mixture of dextrin and sodium carboxymethylcellul...
Embodiment 2
[0034] In this example, the parts by weight of the components of the self-flowing large surface repair material for converters are as follows: 60 aggregates, 22 fine powders, 15 fine powders, 3 binders, 7 burning accelerators, 0.3 explosion-proof agents, and 3 thickeners .
[0035] The aggregates include: 0.088mm2 Micropowder and active α-Al 2 o 3 Mixture of micropowders, where SiO 2 Micropowder, SiO 2 Content≥92%, particle size≤45μm, α-Al 2 o 3 In micropowder, α-Al 2 o 3 Content ≥ 99%, particle size ≤ 2μm. The binding agent is sodium tripolyphosphate. The sintering accelerator is a mixture of synthetic magnesia-calcium-iron sand and forsterite, among which, the content of MgO in the synthetic magnesia-calcium-iron sand is 65-74%, the content of CaO: 20-23%, and the content of Fe 2 o 3 Content: 3~8%, MgO content of forsterite ≥40%, SiO 2 Content ≤ 42%. The explosion-proof agent is glass fiber. The thickener is a mixture of dextrin and sodium polyacrylate.
[0036...
Embodiment 3
[0038] In this example, the parts by weight of the components of the self-flowing large surface repair material for converters are as follows: 50 aggregates, 25 fine powders, 20 fine powders, 5 binders, 5 burning accelerators, 0.5 explosion-proof agents, and 1 thickener .
[0039] The aggregates include: 3mm2 Micropowder and active α-Al 2 o 3 Mixture of micropowders, where SiO 2 Micropowder, SiO 2 Content≥92%, particle size≤45μm, α-Al 2 o 3 In micropowder, α-Al 2 o 3 Content ≥ 99%, particle size ≤ 2μm. The binding agent is sodium hexametaphosphate. The sintering accelerator is synthetic magnesia-calcium-iron sand, of which the content of MgO in the synthetic magnesia-calcium-iron sand is 65-74%, the content of CaO is 20-23%, and the content of Fe 2 o 3 Content: 3~8%. The explosion-proof agent is polypropylene fiber. The thickener is a mixture of dextrin and clay.
[0040] The performance testing results of the self-flowing large surface repair material for convert...
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