Production ingredients capable of improving quality of finished pellets and preparation process of production ingredients

A pelletizing and quality technology, which is applied in the field of production ingredients and its preparation that can improve the quality of finished pellets, can solve the problems of large impact on the quality of green pellets and the strength of finished ores, the impact of production fuel consumption and production costs, and reduce the production of pellets. Quality and other issues, to achieve the effect of reducing gas consumption, high economic benefits and environmental protection, and increasing the output of shaft furnace

Inactive Publication Date: 2021-11-02
舞钢中加钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After research, it is found that changes in the proportion of mineral powder used in pellets have a great impact on the quality of green pellets and the strength of finished ore, and also have a great impact on production fuel consumption and production costs
[0003] In the prior art, due to the fine particle size and composition of the raw materials, the particle size and strength of the green pellets are relatively poor during the pelletizing process. During the roasting process of the shaft furnace, the air permeability in the furnace is directly affected, and the quality of the pellets is reduced; therefore , the present invention proposes a production ingredient that can improve the quality of finished pellets and its preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The invention provides a technical solution: a production ingredient that can improve the quality of finished pellets. The formulation of the production ingredient includes the following components: 77% of the first magnetite, 2.5% of the second magnetite, 8 hematite %, dust removal ash 6% and bentonite 1.5%.

[0026] Among them, the first magnetite particle size -200 mesh ≥ 93%, -325 mesh ≥ 73%; the second iron ore particle size -200 mesh ≥ 90%, -325 mesh ≥ 70%; hematite particle size -200 mesh ≥ 80%, -325 mesh ≥ 60%; dust removal ash particle size -200 mesh ≥ 80%, -325 mesh ≥ 55%, bentonite particle size -200 mesh ≥ 95%.

[0027] A kind of preparation process of the production ingredients that can improve the quality of finished pellets as described above, the preparation method comprises the following steps:

[0028] Step 1: Weighing quantitatively, weighing all the raw materials according to the above components;

[0029] Step 2: Materials are mixed, and the mater...

Embodiment 2

[0033] The invention provides a technical solution: a production ingredient that can improve the quality of finished pellets. The formulation of the production ingredient includes the following components: 78% of the first magnetite, 2.8% of the second magnetite, 9 hematite %, dust removal ash 7% and bentonite 1.6%.

[0034] Among them, the first magnetite particle size -200 mesh ≥ 93%, -325 mesh ≥ 73%; the second iron ore particle size -200 mesh ≥ 90%, -325 mesh ≥ 70%; hematite particle size -200 mesh ≥ 80%, -325 mesh ≥ 60%; dust removal ash particle size -200 mesh ≥ 80%, -325 mesh ≥ 55%, bentonite particle size -200 mesh ≥ 95%.

[0035] A kind of preparation process of the production ingredients that can improve the quality of finished pellets as described above, the preparation method comprises the following steps:

[0036] Step 1: Weighing quantitatively, weighing all the raw materials according to the above components;

[0037] Step 2: Materials are mixed, and the mater...

Embodiment 3

[0041] The invention provides a technical solution: a production ingredient that can improve the quality of finished pellets. The formulation of the production ingredient includes the following components: 79% of the first magnetite, 3.2% of the second magnetite, 11% of hematite %, dust removal ash 7% and bentonite 1.8%.

[0042] Among them, the first magnetite particle size -200 mesh ≥ 93%, -325 mesh ≥ 73%; the second iron ore particle size -200 mesh ≥ 90%, -325 mesh ≥ 70%; hematite particle size -200 mesh ≥ 80%, -325 mesh ≥ 60%; dust removal ash particle size -200 mesh ≥ 80%, -325 mesh ≥ 55%, bentonite particle size -200 mesh ≥ 95%.

[0043] A kind of preparation process of the production ingredients that can improve the quality of finished pellets as described above, the preparation method comprises the following steps:

[0044] Step 1: Weighing quantitatively, weighing all the raw materials according to the above components;

[0045] Step 2: Materials are mixed, and the ...

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PUM

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Abstract

The invention discloses production ingredients capable of improving the quality of finished pellets. The production ingredients comprise the following components of 77%-80% of first magnetite, 2.5%-3.5% of second magnetite, 8%-12% of hematite, 6%-8% of fly ash and 1.5%-1.9% of bentonite. The invention further discloses a preparation process of the production ingredients capable of improving the quality of the finished pellets. The preparation method comprises the following steps of quantitative weighing, material mixing, pelletizing and matched burning. The preparation process has the beneficial effects that after the ingredients provided by the invention are adopted, the quality of green pellets is obviously improved, the air permeability in a furnace is good, the air pressure can be reduced by 1kpa, the coal gas is reduced by 3000m<3> / h, and the temperature of a calcining zone is increased by 20 DEG C (the calcining temperature is increased to 1150 plus or minus 20 DEG C from the original 1130 plus or minus 20 DEG C) because hematite and fly ash are added, so that the calcining quality of the pellets is ensured; by adopting an existing ingredient scheme, the problem of treatment of the fly ash is well solved, a virtuous cycle is established for utilization of the fly ash, and the method has high economic benefits and environmental protection effects.

Description

technical field [0001] The invention relates to the technical field of production ingredient preparation, in particular to a production ingredient capable of improving the quality of finished pellets and a preparation process thereof. Background technique [0002] Pellet production is an artificial rich ore production process that pelletizes ore powder and roasts it. After research, it is found that the change of the proportion of mineral powder used in pellets has a great impact on the quality of green pellets and the strength of finished ore, and also has a great impact on production fuel consumption and production costs. [0003] In the prior art, due to the fine particle size and composition of the raw materials, the particle size and strength of the green pellets are relatively poor during the pelletizing process. During the roasting process of the shaft furnace, the air permeability in the furnace is directly affected, and the quality of the pellets is reduced; therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243C22B1/248C22B1/16
CPCC22B1/243C22B1/248C22B1/16
Inventor 赵旭阳刘顺江吕书民陆胜良
Owner 舞钢中加钢铁有限公司
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