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A method for producing converter dephosphorization agent from alumina tailings (red mud)

A converter dephosphorization agent and dephosphorization agent technology, which is applied in the field of metallurgical charge, can solve the problems of pollution, waste of the environment, and inability to efficiently utilize red mud, and achieve the effects of reducing splashing, low equipment cost, and remarkable dephosphorization effect

Active Publication Date: 2018-11-02
武汉振海科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for producing converter dephosphorization agent from red mud, which is used to solve the problem that the middle-grade or low-grade iron-containing red mud produced by the existing Bayer method cannot be efficiently produced. Problems of waste and environmental pollution caused by utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] S1 Preparation of magnetic separation red mud:

[0054] The raw material red mud is magnetically separated to obtain the magnetically separated red mud.

[0055] The ingredients of the raw material red mud selected in this embodiment include: 15.0 parts by weight of SiO2, 15.0 parts by weight of Al2O3, 8.0 parts by weight of Na2O, and 50.0 parts by weight of Fe2O3, The parts by weight of TiO2 are 3.0 parts.

[0056] The magnetic separation red mud composition obtained by magnetic separation of PYG-15 magnetic separator includes: 3.0 parts by weight of CaO, 15.0 parts by weight of SiO2, 15.0 parts by weight of Al2O3, and 15.0 parts by weight of R2O The number is 5.0 parts, the parts by weight of Fe2O3 is 65.0 parts, and the parts by weight of TiO2 is 2.0 parts.

[0057] S2 prepares the dephosphorization agent precursor:

[0058] Calcium aluminate is added to the above magnetic separation red mud and mixed to form a dephosphorization agent precursor, wherein the mass r...

Embodiment 2

[0066] S1 Preparation of magnetic separation red mud:

[0067] The raw material red mud is magnetically separated to obtain the magnetically separated red mud.

[0068] The ingredients of the raw red mud selected in this embodiment include: 5.0 parts by weight of CaO, 5.0 parts by weight of SiO2, 10.0 parts by weight of Al2O3, and 10.0 parts by weight of Na2O, The parts by weight of Fe2O3 are 45.0 parts by weight, and the parts by weight of TiO2 are 2.0 parts by weight.

[0069] The magnetic separation red mud components obtained by magnetic separation of PYG-15 magnetic separator include: the parts by weight of CaO are 8 parts by weight, the parts by weight of SiO2 are 12 parts by weight, the parts by weight of Al2O3 are 17.0 parts by weight, and the parts by weight of Na2O The number is 6.0 parts, the parts by weight of Fe2O3 is 55.0 parts, and the parts by weight of TiO2 is 2.0 parts.

[0070] S2 prepares the dephosphorization agent precursor:

[0071] Calcium aluminate ...

Embodiment 3

[0079] S1 Preparation of magnetic separation red mud:

[0080] The raw material red mud is magnetically separated to obtain the magnetically separated red mud.

[0081] The ingredients of the raw red mud selected in this embodiment include: 3.2 parts by weight of CaO, 5.0 parts by weight of SiO2, 10.0 parts by weight of Al2O3, and 10.0 parts by weight of Na2O, The parts by weight of Fe2O3 are 50.0 parts by weight, and the parts by weight of TiO2 are 2.5 parts by weight.

[0082] The magnetic separation red mud composition obtained by magnetic separation of PYG-15 magnetic separator includes: 13.0 parts by weight of CaO, 5.0 parts by weight of SiO2, 12.0 parts by weight of Al2O3, and 12.0 parts by weight of Na2O The number is 3.7 parts, the parts by weight of Fe2O3 is 62.0 parts, and the parts by weight of TiO2 is 1.3 parts.

[0083] S2 prepares the dephosphorization agent precursor:

[0084] Calcium aluminate is added to the above-mentioned magnetic separation red mud, and ...

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Abstract

The invention discloses a method of producing a converter dephosphorization agent by using alumina tailings (red mud). The method comprises the following steps: S1, preparation of magnetic separation red mud: raw red mud is subjected to magnetic separation and the magnetic separation red mud is obtained; S2, preparation of a dephosphorization agent precursor: calcium aluminate and calcium carbonate are added to the magnetic separation red mud and mixed, and the dephosphorization agent precursor is formed; and S3, preparation of the converter dephosphorization agent: an adhesive is added to the dephosphorization agent precursor, the dephosphorization agent precursor is subjected to mixed forming, drying is carried out till the moisture content is lower than 3%, and the converter dephosphorization agent is formed. Through recovering the iron-containing middle-low grade red mud, the converter dephosphorization agent is prepared according to the method, and the preparation cost of the converter dephosphorization agent is reduced substantially based on computation and a test. In addition, the problems of land occupation and pollution of the iron-containing middle-low grade red mud are solved. After the prepared converter dephosphorization agent is put into use, the dephosphorization efficiency of the converter dephosphorization agent reaches around 90%, and the dephosphorization effect is significant.

Description

technical field [0001] The invention relates to the technical field of metallurgical charge, in particular to a method for producing a dephosphorization agent for a converter by using the middle and low grade Bayer process red mud alumina tailings (red mud). Background technique [0002] Dephosphorization agent refers to the general term for various additives used for pre-dephosphorization in molten iron pretreatment. In the existing converter steelmaking slagging, the dephosphorization agent used is usually an oxidative dephosphorization agent, which is formed by a combination of easily reduced oxidants as an oxygen source, basic oxides as a base, and fluxes. Common products are soda-based dephosphorization agents, lime-based dephosphorization agents, etc. The basic oxide as the base in the dephosphorization agent is to generate phosphate with the acidic oxide P2O5, thereby reducing the activity of P2O5 in the slag, that is, improving the stability of P2O5 generated by pho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/28C21C7/064
CPCC21C5/28C21C7/0645Y02P10/20
Inventor 张启宇周娴李文明
Owner 武汉振海科技有限公司
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