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The method of preventing kr stirring desulfurization slag tank from sticking to the tank

A technology for stirring desulfurization and desulfurization slag is applied in the field of preventing sticking of KR agitating desulfurization slag tanks. The effect of tank charges

Active Publication Date: 2020-11-10
XINJIANG BAYI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. There is no technology related to anti-sticking slag in desulfurization slag tank in China
[0006] 2. In the field of hot metal pretreatment, there are literatures that only mention the anti-sticking slag process of hot metal tanks

Method used

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Comparison scheme
Effect test

Embodiment Construction

[0010] A method to prevent the sticking of the KR agitated desulfurization slag tank, taking a 120-ton converter production line as an example, the converter and molten iron pretreatment both use a volume of 11m 3 The steel castings are made of slag pots, and the slag volume of the converter is 10 tons per furnace. The process steps are as follows:

[0011] 1) Before the slag tank is put into use, add 100Kg of coke powder and 400Kg of dry blast furnace slag to the bottom of the slag tank. The particle size of the blast furnace slag is 2mm. The tank is hoisted to the converter steel slag truck, and the steel slag truck is driven out to the slag drop point. Carrying out the slag, chemical reaction will occur in the process: 3C+Fe 2 O 3 =3CO↑+2Fe, the generated CO gas overflows to foam the slag, forming a very thin slag film on the inner wall of the slag tank; SiO in the blast furnace slag 2 And Al 2 O 3 Will be combined with 3CaO·SiO in converter slag 2 The reaction reduces the visc...

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Abstract

The invention discloses a method for preventing a KR stirring and desulphurizing slag tank from being adhered. The method disclosed by the invention comprises the following steps of (1), before using the slag tank, adding coke powder containing 10Kg / T of steel slag and drying blast-furnace granulated slag containing 40Kg / T of steel slag at the bottom of the slag tank, controlling the granularity of the blast-furnace granulated slag to be below 3 mm, lifting the tank on a converter steel slag vehicle, driving the steel slag vehicle to a slag discharging point to receive slag; and (2), after receiving slag, driving the steel slag vehicle outside a slag field to pour out liquid steel slag in the steel slag tank, and then, filling desulphurizing slag in the steel slag tank adhered with a slag film on the inner wall. The film has ultrahigh refractoriness and has the separation effect, and thus, adhesion of the steel slag tank due to the fact that iron liquid in the desulphurizing slag is directly contacted with the steel slag tank is prevented.

Description

Technical field [0001] The invention relates to a method for preventing the sticking of the KR stirring desulfurization residue tank. Background technique [0002] After molten iron pretreatment and desulfurization, slag removal is required. Due to the surface tension of molten iron and solid dispersion slag, molten iron will inevitably enter the slag tank, and the slag iron will grow laterally on the inner wall of the cast steel slag tank, forming difficult-to-handle slagging. The slag tank has a high frequency of slagging, and the turnover of the slag tank is difficult. Some of the slag tanks require mechanical knocking to clean up the residue sticking to the wall and the lower part of the tank. The processing cost is high and the desulfurization cost is increased. It is a problem that plagues steelmaking desulfurization production. [0003] Search literature (1) Liu Wenshu, Zhao Xuezhong, Ke Li, etc. "Discussion on the Combination of Stirring Process and Equipment for Hot Metal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064C21C1/02
Inventor 陈跃军刘勇俞海明李栋张家斌姜新平王瑞利段建勇王洪林戴达奎李明星马辉王健王伟
Owner XINJIANG BAYI IRON & STEEL
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