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Method for resourceful treatment of blast furnace gas mud by using slag braising process

A technology of blast furnace gas mud and resource utilization, which is applied in the field of resource utilization of blast furnace gas, can solve the problems of increasing equipment, low market price, and difficulty in large-scale operation and use, and achieves the effect of reducing costs and saving equipment investment

Active Publication Date: 2020-12-25
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the cement iron correction material market is a conventional raw material for cement production, its market price is not high. If the conventional drying, washing and filtering process is adopted, not only additional equipment is required, but also the processing cost is high, making it difficult to operate on a large scale.

Method used

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  • Method for resourceful treatment of blast furnace gas mud by using slag braising process
  • Method for resourceful treatment of blast furnace gas mud by using slag braising process
  • Method for resourceful treatment of blast furnace gas mud by using slag braising process

Examples

Experimental program
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Effect test

Embodiment 1

[0038]Seefigure 1 , A method for treating blast furnace gas mud by utilizing the slag slag process, which is characterized in that it comprises the steps:

[0039](1) Hardening treatment of blast furnace gas mud:

[0040]Mix 10t of blast furnace gas mud with a water content of about 36% and 2t of steel slag silt uniformly to obtain the first mixture. After standing for 3 days, the steel slag silt and blast furnace gas sludge undergo hydration and gelation reactions to make the first mixture condense. Piece;

[0041]Among them, the chemical components and weight percentages included in the dry blast furnace gas mud are: 25.0%≤TFe≤40.0%, CaO≤10.0%, MgO≤5.0%, SiO2≤15.0%, Al2O3≤10.0%, K2O≤5.0%, Na2O≤5.0%, 10%≤C≤30%; Cl≤3.0%, Zn≤3.5%, the balance is combined with Fe element O and other unavoidable impurities.

[0042]Among them, steel slag powder sand is 0~5mm natural grade steel slag particles produced during the secondary processing of steel slag. The chemical composition and weight percentage inc...

Embodiment 2～4

[0056]The steps of Examples 2 to 4 are the same as that of Example 1, with only the adjustment of parameters, as shown in Table 1, Table 2 and Table 3.

[0057]Table 1 Process parameters

[0058]

[0059]

[0060]Table 2 Chemical composition and weight percentage of blast furnace gas mud

[0061] Example 1 Example 2 Example 3 Example 4 TFe(%) 25403530 CaO(%) 1063.55.5 MgO(%) 52.54.53.2 SiO 2 (%)

1210.5157.8 Al 2 O 3 (%)

86.22.110 K 2 O(%)

4.53.253.6 Na 2 O(%)

4.23.63.65.0 C(％)12102030 Cl(％)2.51.23.01.7 Zn(%) 3.51.52.01.2

[0062]Table 3 Chemical composition and weight percentage of steel slag silt and steel slag tailings

[0063] Example 1 Example 2 Example 3 Example 4 TFe 5151310 CaO 55404551 MgO 5121511 SiO 2

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Abstract

The invention relates to the technical field of resource utilization of blast furnace gas, in particular to a method for resourceful treatment of blast furnace gas mud by using a slag braising process. The method comprises the following steps of: (1) uniformly mixing blast furnace gas mud and steel slag silt to obtain a first mixture, and making the first mixture stand still to cake the first mixture; (2) putting the caked first mixture into a hot braising slag pool, and flushing the first mixture by using water fetching equipment; (3) conducting slag braising treatment, specifically, pouringliquid converter steel slag into the heat braising slag pool, and covering the first mixture with the liquid converter steel slag, covering the heat braising slag pool with a cover, pumping water intothe liquid converter steel slag through water pumping equipment, and making an obtained mixture stand still to obtain a dried second mixture; and (4) performing crushing and magnetic separation on the second mixture to obtain a material with the particle size of 0-5 mm and adopting the material as a cement iron correction material. The method has the characteristics of low cost and few impuritiesin the obtained cement iron correction material, and can be used for large-scale production.

Description

Technical field[0001]The invention relates to the technical field of resource utilization of blast furnace gas, in particular to a method for resource utilization of slagging slag process to treat blast furnace gas mud.Background technique[0002]Iron-containing dust and sludge is a typical solid waste of iron and steel metallurgical enterprises, and its resource utilization is one of the key issues in the utilization of solid waste resources in iron and steel enterprises. Blast furnace gas sludge is a typical iron-containing dust sludge in steel mills. While large-scale blast furnaces use gravity dust removal as the first coarse dust removal of gas, the second stage dust removal usually adopts a wet dust removal process such as a Wen-style scrubber or a Bischoff scrubber. , In the second stage of dust removal, a mud cake with a water content of 40-50% is produced, which is called blast furnace gas mud. Blast furnace gas mud contains a certain amount of iron and carbon, and re-sinteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/147C04B7/38
CPCC04B7/147C04B7/38Y02P40/10
Inventor 康凌晨张树华马贵生周克飞刘瑛张华
Owner 武汉钢铁有限公司
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