A method for modifying molten steel slag with double molten pool furnace

A molten, converter steel slag technology is applied in the modification treatment under reducing atmosphere conditions, and the steel slag is in the field of oxidation, which can solve the problems such as limiting the use of steel-making waste slag, and achieve the effect of expanding the utilization of resources.

Active Publication Date: 2022-05-03
MOUNTOP GRP CO LTD
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Problems solved by technology

However, due to the enrichment of phosphorus in the steel slag when it is reused in the steel plant; and due to factors such as excessive free magnesium and calcium ions, the use of steelmaking waste slag as a concrete admixture is limited.

Method used

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  • A method for modifying molten steel slag with double molten pool furnace
  • A method for modifying molten steel slag with double molten pool furnace
  • A method for modifying molten steel slag with double molten pool furnace

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Embodiment Construction

[0033] The present invention will be further explained below in conjunction with the accompanying drawings.

[0034] Such as Figures 1 to 3 Shown, a kind of double melting pool furnace modification method of the present invention handles the method for hot molten steel slag, and this method comprises:

[0035] Provide double molten pool furnace: the furnace body of the double molten pool furnace contains two molten pools, and the top of the two molten pools is respectively equipped with a furnace cover that can be opened and closed. The two molten pools are connected through the furnace connecting flue on the furnace body. The connection port between the molten pool and the furnace body is arranged along the tangential direction of the inner wall of the molten pool, and an intermediate high-temperature flue is arranged between the two molten pools. One end of the intermediate high-temperature flue is connected to the powder collection system, and the other end is connected th...

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Abstract

The invention discloses a method for modifying molten steel slag in a double molten pool furnace. The method includes: providing a double molten pool furnace: the furnace body of the double molten pool furnace contains two molten pools, and the two molten pools pass through the The furnace body is connected to the flue, and the middle high-temperature flue is arranged between the two melting pools. One end of the middle high-temperature flue is connected to the powder collection system, and the other end is connected to one of the two melting pools through the flue gas guiding switching valve; The air-guided switching valve uses the two melting pools alternately as an oxidation melting pool and a reduction melting pool, and uses the oxidation melting pool and the reduction melting pool to realize comprehensive treatment of steel slag, zinc-containing dust and symbiotic ores that are difficult to dissociate. This method can modify steel slag into iron-making reduction slag to be widely used as concrete admixture, and can remove the alkali metal harmful to smelting in the dust removal dust of steel mills, and also provides a kind of refractory slag existing in nature. Melt dissociation method of symbiotic ore.

Description

technical field [0001] The invention belongs to the field of recycling and comprehensive reuse of solid waste resources in iron and steel plants, and in particular relates to a method for modifying steel slag under oxidation and reduction atmosphere conditions. Background technique [0002] my country is the country with the largest steel production capacity. According to statistics, by 2020, the annual production capacity of crude steel has exceeded 1 billion tons, which means that more than 100-150 million tons of steel slag needs to be disposed of as waste, which does not include 300-400 million tons The above ironmaking waste. [0003] Blast furnace ironmaking waste slag, commonly known as "blast furnace slag". After water quenching treatment to prepare ultrafine powder, it has been widely used as concrete admixture. Steelmaking waste slag contains high iron elements, and the content of TFe (total iron) reaches 20%. At the same time, the slag discharge temperature of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/14
CPCC21B13/14C21B13/0006
Inventor 顾军盖洪江杜刚刘海峰张鹤
Owner MOUNTOP GRP CO LTD
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