Furnace slag bubblization inhibition method

A foaming and slag technology, applied in the direction of manufacturing converters, etc., can solve the problem of inappropriate foaming slag inhibition, and achieve the effect of reducing turnover frequency and low economic cost

Inactive Publication Date: 2014-01-29
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is only suitable for slag pressing in the process of converter blowing, and is not suitable for the suppression of foamed slag in the process of converting the converter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A steel plant uses a 120-ton converter for smelting, and its smelting end point (Si content 0.025% by weight, Mn content 0.02% by weight, P content 0.015% by weight, S content 0.012% by weight, and the molten steel temperature at the smelting end point is 1680°C) is 130t. .

[0032] Before tapping at the end of the converter, when the converter is shaken to the sampling position, put 3.9kg of hollow tubular paper carbonaceous material into the converter, wherein the paper carbonaceous material is quantitatively 100g / m 2 , the carbon content is 96% by weight, the length is 1 meter, the tube wall thickness is 1 mm, and the inner diameter is 8 mm kraft paper hollow paper tube. It is only 10mm. According to on-site sampling and comparison, the phosphorus return in the tapping process is only 0.001% by weight, and the success rate of spatter control is 100% by weight.

Embodiment 2

[0034] A steel plant uses a 120-ton converter for smelting, and its smelting end point (Si content 0.025% by weight, Mn content 0.02% by weight, P content 0.015% by weight, S content 0.012% by weight, and the molten steel temperature at the smelting end point is 1680°C) is 140t. .

[0035] After the smelting is finished, the furnace is turned back and slag is discharged, and 7kg of hollow tubular paper carbonaceous material is put into the slag tank, wherein the paper carbonaceous material is quantitatively 80g / m 2 , the carbon content is 85% by weight, the length is 1.5 meters, the thickness is 1 millimeter, and the inner diameter is 8 millimeters. At this time, the slag returns to dry quickly, and the volume decreases rapidly. The phenomenon that the slag gushes out of the slag pot does not appear in the whole process, and According to this method, the tapping operation of 5-6 furnaces is continuously carried out, and the slag overflow rate is 0% by weight.

Embodiment 3

[0037] A steel plant uses a 120-ton converter for smelting, and its smelting end point (Si content 0.025% by weight, Mn content 0.02% by weight, P content 0.015% by weight, S content 0.012% by weight, and the molten steel temperature at the smelting end point is 1680°C) is 135t. .

[0038] Before tapping at the end of the converter, when the converter is shaken to the sampling position, put 1.35kg of hollow tubular paper carbonaceous material into the converter, wherein the paper carbonaceous material is quantitatively 120g / m 2 , the carbon content is 90% by weight, the length is 2.5 meters, the thickness is 20 mm, and the inner diameter is 120 mm. In contrast, the phosphorus return during the tapping process is only 0.002% by weight, and the success rate of controlling the splashing is 100% by weight.

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Abstract

The invention discloses a novel and simple furnace slag bubblization inhibition method. The furnace slag bubblization inhibition method is characterized in that a carbonaceous material is in contact with bubblization furnace slag on the surface of molten steel in a converter turning-down process, wherein the carbonaceous material is a paper material with the quantity of 40-120g/m<2>, the content of C in the carbonaceous material is higher than or equal to 85 percentage by weight, and the paper material can be used for effectively inhibiting the furnace slag bubblization, increasing and controlling the success rate of furnace slag sputtering and/or increasing and controlling the overflow rate of furnace slag.

Description

technical field [0001] The invention relates to a method for suppressing foaming of slag. Background technique [0002] The foaming of converter slag often occurs during the operation of converter steel tapping. At this time, the slag splashes due to too much foaming when the furnace is pouring slag, which not only interferes with the normal operation of converter steelmaking, but also may cause damage to equipment and personnel if it is not properly operated. Injuries are produced, and the products brought out contain a large amount of metal, which increases the consumption of steel materials. [0003] In the converter adopting the "double slag dephosphorization" process, the foaming of the slag is very serious during the slag discharge process. The document "Analysis and Control of Sputtering in the Process of Converter Steelmaking" introduces that the volume of the slag at this time is 3-4 times the volume of normal slag, when the slag is poured, the slag may also splash...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/36
Inventor 陈永梁新腾曾建华陈均李桂军杨森祥李盛龚洪君杨晓东何为
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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