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Preparation method of converter steelmaking synthetic slag former

A converter steel-making and slag-forming agent technology, applied in the direction of manufacturing converters, etc., can solve the problems of polluting environment slag-forming speed, poor dephosphorization effect, and difficulty in comprehensive utilization of metallurgical waste, shortening the slag-forming time, improving furnace efficiency, etc. age, the effect of improving the dephosphorization effect

Active Publication Date: 2014-09-24
MAANSHAN RUNTONG HEAVY IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the difficulty in the comprehensive utilization of metallurgical waste in the prior art, and the slagging agent often contains CaF 2 Due to the problems of polluting the environment, slow slagging speed, and poor dephosphorization effect, a method for preparing a synthetic slagging agent for converter steelmaking is provided, and a synthetic slagging agent using metallurgical waste as raw material is prepared, which not only utilizes metallurgical waste , and achieve the purpose of rapid slagging and efficient dephosphorization

Method used

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  • Preparation method of converter steelmaking synthetic slag former
  • Preparation method of converter steelmaking synthetic slag former
  • Preparation method of converter steelmaking synthetic slag former

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Embodiment 1

[0031] A synthetic slagging agent for converter steelmaking in this embodiment has the following components and contents: converter dust 13kg, iron oxide scale 28kg, gas ash 8kg, fly ash 4kg, pellet sieve blanking 20kg, sinter sieve Blanking 13kg, waste high alumina brick 12kg, bentonite 15kg, active lime 38kg, manganese oxide 10kg, magnesium oxide 8kg, sodium carbonate 12kg. It is worth noting that the converter dust in the present invention is the iron-containing material recovered from the furnace gas of the oxygen converter through a dust collector. In addition, the gas dust removal system of the ironmaking blast furnace is composed of gravity dust removal and fine dust removal. The gas ash used in the present invention is the dry fine dust obtained by dry dust removal in the second stage fine dust remover. The gas ash composition The mass percentage content is: TFe: 32%, C: 28%, CaO: 8.6%, SiO 2 : 5.4%, MgO: 1.5%, Al 2 o 3 : 3.2%, the rest are unavoidable impurities. ...

Embodiment 2

[0048] A synthetic slagging agent for converter steelmaking in this embodiment has the following components and contents: converter dust 10kg, iron oxide scale 25kg, gas ash 5kg, fly ash 3kg, pellet sieve blanking 15kg, sinter sieve Blanking 10kg, waste high alumina brick 9kg, bentonite 12kg, active lime 30kg, manganese oxide 6kg, magnesium oxide 5kg, sodium carbonate 10kg. It is worth noting that the converter dust in the present invention is the iron-containing material recovered from the furnace gas of the oxygen converter through a dust collector. In addition, the gas dust removal system of the ironmaking blast furnace is composed of gravity dust removal and fine dust removal. The gas ash used in the present invention is the dry fine dust obtained by dry dust removal in the second stage fine dust remover. The gas ash composition The mass percentage content is: TFe: 35%, C: 25%, CaO: 9.7%, SiO 2 : 6%, MgO: 1.2%, Al 2 o 3 : 2.4%, the rest are unavoidable impurities. The ...

Embodiment 3

[0062] A synthetic slagging agent for converter steelmaking in this embodiment has the following components and contents: 18 kg of converter dust, 32 kg of iron scale, 10 kg of gas ash, 5 kg of fly ash, 25 kg of pellet sieve, sinter sieve Blanking 15kg, waste high alumina brick 16kg, bentonite 18kg, active lime 45kg, manganese oxide 12kg, magnesium oxide 10kg, sodium carbonate 15kg. It is worth noting that the converter dust in the present invention is the iron-containing material recovered from the furnace gas of the oxygen converter through a dust collector. In addition, the gas dust removal system of the ironmaking blast furnace is composed of gravity dust removal and fine dust removal. The gas ash used in the present invention is the dry fine dust obtained by dry dust removal in the second stage fine dust remover. The gas ash composition The mass percentage content is: TFe: 28%, C: 33%, CaO: 7.5%, SiO 2 : 4.5%, MgO: 1.8%, Al 2 o 3 : 3.8%, the rest are unavoidable impuri...

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Abstract

The invention discloses a preparation method of a converter steelmaking synthetic slag former, belonging to the technical field of converter steelmaking of ferrous metallurgy. The method comprises the following steps of: uniformly mixing 10-18 parts of converter dust, 25-32 parts of scale, 5-10 parts of gas ash, 9-16 parts of waste high-alumina brick and bentonite to obtain a mixture B; adding 30-45 parts of active lime, 6-12 parts of active lime, 5-10 parts of magnesium oxide and bentonite into the mixture B to obtain a mixture C; mixing 10-15 parts of sodium carbonate with the mixture A and the mixture C, and pre-melting at 1,300-1,450 DEG C to obtain a mixture D; and cooling and crushing to obtain the synthetic slag former. According to the synthetic slag former, the metallurgic waste difficult to use is used as a component of the slag former, the prepared slag former has high dephosphorization efficiency, and the slag forming time is short.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy converter steelmaking, and more specifically relates to a preparation method of a synthetic slagging agent for converter steelmaking. Background technique [0002] Slagging is an essential part of the steelmaking process. Steelmaking and ironmaking must reduce the impurities in the steel. These impurities are separated and enter the slag. Because the slag has a light specific gravity, it is easier to float on the molten steel. Removal, the slag can be separated from the molten steel only by slag removal treatment. In addition, slag also has the function of protecting molten steel from direct contact with the atmosphere. Slagging is the addition of slagging agents during steelmaking to form slag and facilitate smelting. [0003] Therefore, converter slagging is the key operation of converter smelting, and rapid slagging is the core content of converter slagging. The slagging agen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36
Inventor 李以则庆辉李振东
Owner MAANSHAN RUNTONG HEAVY IND TECH CO LTD
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