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Preparation method of low-viscosity casting powder for preparing steelmaking cast ingots

A technology of mold flux and low viscosity, which is applied in the direction of improving process efficiency, etc., to achieve the effects of good thermal insulation performance, low bulk density and good spreadability

Inactive Publication Date: 2012-12-12
马鞍山科润冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for die-casting low-carbon steel, it is often unavoidable to cause local carburization defects in steel ingots caused by the preparation method of mold slag.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] A method for preparing low-viscosity mold flux for making steel mold castings, the parts by weight of the components are:

[0025] Modified fly ash 55

[0026] Blast furnace slag 20;

[0027] expanded perlite 30;

[0028] soda ash 5;

[0029] Expanded graphite powder 12

[0030] Flake graphite powder 5

[0031] Li 2 O 8;

[0032] Na 2 O 4;

[0033] The preparation of the modified fly ash is to place the burnt fly ash successively in 20% sulfuric acid and 16% sodium hydroxide solution, stir for 22 hours, and then filter out the fly ash from the acid-base immersion solution. , Rinse with deionized water until neutral, and test with PH test paper to confirm, finally filter, dry, and then send the three materials into the fluidization according to the weight ratio of fly ash: calcium carbonate powder: quartz sand powder 1:0.35:0.58 Roast at 1050-1100°C in the bed for 1.5 hours, and grind into nano powder after cooling;

[0034] It is obtained by mixing the raw mat...

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Abstract

The invention discloses a preparation method of a low-viscosity casting powder for preparing steelmaking cast ingots, which comprises the following steps: using fly ash and blast-furnace granulated slag as basic slag materials, successively placing the ignited fly ash in 20-25% of hydrochloric acid and 15-20% of sodium hydroxide solution to be stirred for 20-24h, then washing the fly ash filtered from acid-alkali immersion liquid to be neutral with de-ionized water, testing with pH test paper for determination, and finally filtering and drying, wherein the addition amount of fly ash is 45-65 parts by weight. The preparation method provided by the invention has the advantages of reducing the unit weight of raw materials, improving the melting property, the spreading property and the thermal insulation property, and effectively reducing the usage amount of ingot carbon.

Description

technical field [0001] The invention relates to the field of auxiliary materials for steelmaking ingots, in particular to a method for preparing low-viscosity mold flux for steelmaking mold casting. Background technique [0002] In the process of steelmaking and ingot casting, when injecting killed steel, the preparation method of placing or hanging mold slag is usually at the bottom of the ingot mold or near the bottom of the ingot mold. When the method is contacted, the preparation method of mold slag will float on the surface of molten steel. Since the melting point of the preparation method of mold slag is much lower than the temperature of molten steel, a liquid slag layer is formed on the surface of molten steel, and molten steel continuously enters the ingot mold, and the molten steel The surface continues to rise, and the preparation method of mold slag continues to melt, so that the surface of the steel ingot is covered by a layer of slag film. [0003] The prepara...

Claims

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Application Information

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IPC IPC(8): B22D7/00B22D11/111C21C7/076
CPCY02P10/20
Inventor 鲁方志
Owner 马鞍山科润冶金材料有限公司
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