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A method for resourceful treatment of blast furnace gas mud by using slag slag process

A blast furnace gas mud and resource utilization technology is applied in the field of resource utilization of blast furnace gas, which can solve the problems of increasing equipment, low market price and high processing cost, and achieve the effect of reducing cost and saving equipment investment.

Active Publication Date: 2022-04-29
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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  • A method for resourceful treatment of blast furnace gas mud by using slag slag process
  • A method for resourceful treatment of blast furnace gas mud by using slag slag process
  • A method for resourceful treatment of blast furnace gas mud by using slag slag process

Examples

Experimental program
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Effect test

Embodiment 1

[0038] see figure 1 , a method for resourceful treatment of blast furnace gas mud by using slag slag process, characterized in that it comprises the steps of:

[0039] (1) Blast furnace gas mud hardening treatment:

[0040] Mix 10 tons of blast furnace gas mud with a water content of about 36% and 2 tons of steel slag silt evenly to obtain the first mixture. After standing for 3 days, the steel slag silt and blast furnace gas mud undergo hydration and gelation reactions, and the first mixture becomes solidified. piece;

[0041] Among them, the dry basis of blast furnace gas mud includes chemical components and their weight percentages: 25.0%≤TFe≤40.0%, CaO≤10.0%, MgO≤5.0%, SiO 2 ≤15.0%, Al 2 o 3 ≤10.0%, K 2 O≤5.0%, Na 2 O ≤ 5.0%, 10% ≤ C ≤ 30%; Cl ≤ 3.0%, Zn ≤ 3.5%, the balance is O element combined with Fe element and other unavoidable impurities.

[0042] Among them, steel slag silt is 0-5mm naturally graded steel slag particles produced during the secondary processin...

Embodiment 2～4

[0056] The steps of Examples 2 to 4 are the same as those of Example 1, except for 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(%) 25 40 35 30 CaO(%) 10 6 3.5 5.5 MgO(%) 5 2.5 4.5 3.2 SiO 2 (%)

12 10.5 15 7.8 al 2 o 3 (%)

8 6.2 2.1 10 K 2 O(%)

4.5 3.2 5 3.6 Na 2 O(%)

4.2 3.6 3.6 5.0 C(％) 12 10 20 30 Cl(％) 2.5 1.2 3.0 1.7 Zn(%) 3.5 1.5 2.0 1.2

[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 TF 5 15 13 10 CaO 55 40 45 51 MgO 5 12 15 11 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 resource processing of blast furnace gas slime by utilizing a braising slag process. The invention comprises steps: (1) uniformly mixing blast furnace gas mud and steel slag silt to obtain the first mixture and then standing still to make the first mixture agglomerate; (2) placing the agglomerated first mixture in hot slag In the pool, use the water pumping equipment to wash the first mixture; (3) Slag treatment Pour the liquid converter steel slag into the hot slag pool, the liquid converter steel slag covers the first mixture, cover the hot slag pool, and use the water The equipment pours water into the liquid converter steel slag, and after standing still, a dry second mixture is obtained. (4) The second mixture is crushed and magnetically separated to obtain a material with a particle size of 0-5mm as a cement iron correction material. The invention has the characteristics of low cost and less impurity in the obtained cement iron correction material, and can be produced on a large scale.

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 processing of blast furnace gas slime by utilizing a braising slag process. Background technique [0002] Iron-containing dust is a typical solid waste in iron and steel metallurgical enterprises, and its resource utilization is one of the key issues in the utilization of solid waste in iron and steel enterprises. Blast furnace gas mud is a typical steel mill iron-containing dust. Large-scale blast furnaces use gravity dust removal as the first-stage coarse dust removal for gas, and the second-stage dust removal usually uses wet dust removal processes such as Venturi scrubbers or Bischoff scrubbers. , A mud cake with a water content of 40 to 50% is produced in the second stage of dedusting, which is called blast furnace gas mud. Blast furnace gas mud contains a certain amount of iron and carbon, and back-sintering utilizati...

Claims

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Application Information

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Patent Type & Authority Patents(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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