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Steelmaking continuous casting tundish magnesium calcium paint

A steelmaking continuous casting and tundish technology, which is applied to casting equipment, casting molten material containers, manufacturing tools, etc., can solve the problems of low proportion of natural dolomite raw materials and high prices, and achieve abundant raw materials, low production costs, The effect of good thermal insulation

Inactive Publication Date: 2003-12-03
海城华宇耐火材料有限公司
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the proportion of natural dolomite raw materials used in it is not very high, and correspondingly high-priced, sintered auxiliary materials are still needed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Firstly, the main material natural dolomite is broken into particles of 0-3mm, and 95% of the dolomite is weighed in percent by weight for use, wherein 40% of the particle size is ≤0.088mm; the auxiliary material ash clay is weighed 0.8 %, silica micropowder 0.8%, sodium hexametaphosphate 0.5%, solid water glass 0.5%, hemp knife 0.8%, paper fiber 0.8%, then mix together and mix with the above dolomite to be used; also add organic Excipients: polyvinyl alkyl alcohol ether OP-10 0.2%, Tween type non-ionic surfactant T-80 0.05% and sodium dodecylbenzene sulfonate 0.5%, mixed with the above components evenly before packing into bags .

Embodiment 2

[0028] Adopt the broken natural dolomite with embodiment 1, take by weight percentage 90% of dolomite, stand-by; Take by weighing 5% of mid-grade magnesia, which contains MgO≥95%, become 0-3mm particles through crushing; Take auxiliary materials ash clay 1.0%, silicon dioxide micropowder 0.6%, sodium hexametaphosphate 0.4%, solid water glass 0.6%, hemp knife 0.6%, paper fiber 1.0%, then mix together and stir evenly, and the above-mentioned stand-by Dolomite mixed; additional organic auxiliary materials: polyvinyl alkyl alcohol ether OP-10 0.4%, Tween type nonionic surfactant T-80 0.06% and sodium dodecylbenzenesulfonate 0.3%, with the above components Mix together evenly and pack into bags.

[0029] During construction, use the mixture made by the above ratio, add 15-25% water by weight percentage (add 15-20% water for manual application, add 20-25% water for mechanical spraying), and stir to form a uniform paste Smear on the lining of the tundish, let it dry naturally for 3-...

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Abstract

A Mg-Ca paint of the tundish for conticasting is prepared from 11 raw materials including natural dolomite, magnesium sand, clay, SiO2 powder, sodium hexametaphosphate, solid water glass, paper fibres, polyvinyl alkanol ether, tween -80, etc. in a certain proportion. Its advantages are low cost, high adhesion, high corrosion resistance, long service life, and sure effect to purity molten steel.

Description

technical field [0001] The invention relates to a magnesium-calcium coating for a steelmaking continuous casting tundish used as an inner lining coating for a steelmaking equipment tundish. Background technique [0002] Continuous casting is an extremely important process in the iron and steel production process. The tundish is an important link for storing and purifying molten steel, continuously diverting, stabilizing steel flow, and improving the quality of casting slabs. Function, high-quality and high-efficiency continuous casting guarantee. Therefore, the development of high-quality tundish coatings has attracted more and more attention. At present, the coatings used in continuous casting tundishes are generally made of magnesium chromium, which has certain functions of high temperature resistance, slag erosion resistance, heat insulation and pure molten steel, but the distribution of raw materials is extremely uneven, and the transportation cost is high, which increa...

Claims

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Application Information

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IPC IPC(8): B22D11/10B22D41/02C04B35/06C04B35/66
Inventor 张永禄李广达
Owner 海城华宇耐火材料有限公司
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