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Slag collecting agent and preparation method thereof

A technology of slag collecting agent and mass percentage, applied in the field of slag collecting agent and its preparation, can solve the problems of inability to meet the casting requirements of ductile iron, the effect is not significant, and the time of slag removal is reduced, and the slag forming effect is good and the iron loss is small. , the effect of short slag removal time

Active Publication Date: 2012-03-21
宁波康发铸造有限公司
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  • Abstract
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Problems solved by technology

However, the currently used slag collectors are not effective in reducing slag removal time and iron loss, and cannot meet the casting requirements of ductile cast iron.

Method used

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  • Slag collecting agent and preparation method thereof

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Embodiment Construction

[0013] The slag collecting agent mainly uses the neutral substance to expand or melt under the action of high temperature. After expansion, it forms low specific gravity, hollow air holes, and has certain cohesive properties after melting to gather the residue on the surface of the molten iron to form a residue block. Easy to clean up. Since the slag collector uses neutral substances as its main component, its chemical properties are stable and will not cause secondary pollution to molten iron.

[0014] In the first preferred embodiment of the present invention, the mass percent of the slagging agent is: SiO 2 : 74%, Al 2 o 3 : 12.7%, Fe 2 o 3 : 0.8%, Ca: 0.7%, Mg: 0.08%, K 2 O: 4.3%, Na 2 O: 3.0%, the balance is Fe and unavoidable impurities.

[0015] In the second preferred embodiment of the present invention, the mass percent of the slagging agent is: SiO 2 : 74.5%, Al 2 o 3 : 13%, Fe 2 o 3 : 1.0%, Ca: 0.8%, Mg: 0.10%, K 2 O: 4.5%, Na 2 O: 3.2%, the balance is...

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Abstract

The invention discloses a slag collecting agent, belongs to the technical field of cast iron metallurgy and solves the defects that in the prior art, the slag collecting agent has poor slag collecting effect and large iron loss. The slag collecting agent comprises the following components by mass percent: 74%-74.5% of SiO2, 12.7%-13.1% of Al2O3, 0.8%-1.2% of Fe2O3, 0.7%-0.9% of Ca, 0.08%-0.12% of Mg, 4.3%-4.7% of K2O, 3.0%-3.4% of Na2O and the balance of Fe and inevitable impurities. The invention also discloses a preparation method of the slag collecting agent. Compared with the existing slag collecting agent, the slag collecting agent disclosed by the invention has the following beneficial effects: (1) drossing time is short: after the slag collecting agent is added, slagging effect is good, furnace slag is of a large bulk shape, drossing is easy and complete, and drossing time is reduced by two thirds as compared with the drossing time without adding the slag collecting agent; (2) iron loss is small: after the slag collecting agent is added, the average iron loss of iron slag is reduced to less than 1kg / t from 3.5kg / t; and (3) in the use process, the slag collecting agent has no environment pollution, no toxicity, no dust, no odor, wide raw material sources and low cost.

Description

technical field [0001] The invention relates to the field of metallurgical manufacture of cast iron, in particular to a slagging agent and a preparation method thereof. Background technique [0002] At present, in the process of cast iron manufacturing in our country, the desulfurization process has been rapidly promoted and applied. In the production process of ductile cast iron, after spheroidization and inoculation, impurity elements such as sulfur in molten iron are dispersed in molten iron, which is not easy to remove. If a slag rake is used for slag removal, the slag removal time will be too long, and a large amount of molten iron will be lost along with the slag during the slag removal process, which will seriously waste costs and restrict the development of cast iron production capacity. [0003] In order to improve the effect of slag removal, reduce iron loss and improve operation efficiency, a slagging agent needs to be used before slag removal to facilitate rapid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 俞光杰李建国刘锐
Owner 宁波康发铸造有限公司
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