Converter steelmaking synthetic slag former

A technology of converter steelmaking and slagging agent, which is applied in the field of iron and steel metallurgy converter steelmaking, can solve the problems of poor dephosphorization effect, difficult comprehensive utilization of metallurgical waste, and slagging speed of polluted environment, so as to increase furnace life and improve dephosphorization Phosphorus effect, effect of shortening slagging time

Active Publication Date: 2014-12-10
湛江申翰科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 Pollution of the environment, slow slagging speed, and poor dephosphorization effect, a synthetic slagging agent for converter steelmaking is provided, which not only utilizes metallurgical waste as a resource, but also achieves the purpose of rapid slagging and efficient dephosphorization

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  • Converter steelmaking synthetic slag former
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  • Converter steelmaking synthetic slag former

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Embodiment 1

[0025] 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

[0040] 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

[0052] 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 converter steelmaking synthetic slag former, belonging to the technical field of converter steelmaking of ferrous metallurgy. The converter steelmaking synthetic slag former consists of the following components in parts by mass: 10-18 parts of converter dust, 25-32 parts of scale, 5-10 parts of gas ash, 3-5 parts of fly ash, 15-25 parts of pellet sieve residue, 10-15 parts of sinter sieve residue, 9-16 parts of waste high-alumina brick, 12-18 parts of bentonite, 30-45 parts of active lime, 6-12 parts of manganese oxide, 5-10 parts of magnesium oxide and 10-15 parts of sodium carbonate. According to the converter steelmaking synthetic slag former, the wastes, such as converter dust, scale, gas ash and fly ash, which are difficult to utilize comprehensively, of a steelworks are used as partial components of the synthetic slag former so as to recycle the wastes, and moreover, the slag forming time is effectively reduced, and the slag can be quickly formed in the initial stage of converter blowing to realize efficient dephosphorization.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy converter steelmaking, and more specifically relates to 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 agent is used to promote the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/28C21C7/064
CPCY02P10/20
Inventor 吴雪健王海军蒙李朋简秋生
Owner 湛江申翰科技实业有限公司
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