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Sintered ore containing sintered fly ash balls and preparation method

A technology for sintered ore and pellets, applied in the field of sintered ore preparation, can solve the problems of strong hydrophobicity, low cost, poor spheroidization, etc., and achieve the effects of avoiding pollution, low cost and reducing processing cost.

Pending Publication Date: 2021-03-26
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

[0010] The purpose of the present invention is to provide a kind of sintering dust removal method that can make comprehensive utilization of the sintering dust removal dust, has no pollution to the environment, and is low in cost, aiming at the shortcomings of the sintering dust removal ash such as strong hydrophobicity, poor spheroidization, and direct batching and sintering will reduce the quality of sintered ore products. The sintered ore containing sintered dust-removing ash pellets and its preparation method can meet the performance requirements of the prepared sintered ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of sintered ore containing sintered dust removal pellets, its raw material composition and weight percentage content are: mixed ore: 69%, returned ore: 18%, fuel: 3%, flux: 4.92%, sintered particle size ≥ 3mm Dust removal ash ball: 5%, binder 0.08%;

[0037] The mixed ore is composed of 50% limonite, 40% hematite and 10% concentrate powder;

[0038] The flux is a mixture of dolomite, limestone and quicklime in a ratio of 1:1:2;

[0039] The fuel is coke powder;

[0040] The raw material composition of described binding agent: starch 36%, syrup 22%, unslaked lime 42%;

[0041] Its preparation process:

[0042] 1) The dedusting ash produced by sintering is subjected to high-pressure roller grinding, so that the specific surface area of ​​the dedusting ash after roller grinding reaches 1500cm 2 g -1 above;

[0043] 2) Preparation of sintered dedusting ash pellets: Spray 0.08% of the binder on the sintering dedusting ash in step 1), use a cylinder mixer to prod...

Embodiment 2

[0049] A kind of sintered ore containing sintering dust removal pellets, its raw material composition and weight percentage content are: mixed ore: 65%, returned ore: 16%, fuel: 6%, flux: 5.9%, sintered particle size ≥ 3mm Dust removal ash ball: 7%, binder 0.10%;

[0050] The mixed ore is 100% limonite;

[0051] The flux is a mixture of dolomite, limestone and quicklime in a ratio of 1:1:2;

[0052] The fuel is a mixture of coal powder and coke powder in any proportion;

[0053] The raw material composition of described binding agent: starch 23%, syrup 46%, unslaked lime 31%;

[0054] Its preparation process:

[0055] 1) The dedusting ash produced by sintering is subjected to high-pressure roller grinding, so that the specific surface area of ​​the dedusting ash after roller grinding reaches 1500cm 2 g -1 above;

[0056] 2) Preparation of sintered dedusting ash pellets: Spray 0.10% binder of sintering dedusting ash on the sintering dedusting ash in step 1) according to t...

Embodiment 3

[0062] A kind of sintered ore containing sintering dust removal pellets, its raw material composition and weight percentage content are: mixed ore: 71%, returned ore: 15%, fuel: 4.55%, flux: 7%, sintered particle size ≥ 3mm Dust removal ash ball: 2%; binder 0.45%;

[0063] The mixed ore is 100% lump ore sieved powder;

[0064] The flux is a mixture of dolomite, limestone and quicklime in a ratio of 1:1:2;

[0065] The fuel is pulverized coal;

[0066] The raw material composition of described binding agent: starch 41%, syrup 35%, unslaked lime 24%;

[0067] Its preparation process:

[0068] 1) The dedusting ash produced by sintering is subjected to high-pressure roller grinding, so that the specific surface area of ​​the dedusting ash after roller grinding reaches 1500cm 2 g -1 above;

[0069] 2) Preparation of sintered dedusting ash pellets: Spray 0.45% of adhesive on the sintering dedusting ash in step 1) according to the weight percentage of sintering dedusting ash, a...

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Abstract

The invention relates to sintered ore containing sintered fly ash balls. The sintered ore containing the sintered fly ash balls comprises the following raw materials in percentage by weight: 65 to 75percent of uniformly mixed ore, 15 to 20 percent of return ore, 3 to 6 percent of fuel, 5 to 10 percent of flux, 1 to 15 percent of sintered fly ash balls with the particle size being more than or equal to 3mm, and 0.05 to 0.98 percent of adhesive. The preparation method comprises the following steps of rolling sintered fly ash; preparing the sintered fly ash balls; uniformly mixing the uniformlymixed ore, the return ore, the fuel, the flux and the sintered fly ash balls with the particle size being not less than 3mm; sintering; conventionally cooling and screening; and preparing the sinteredore for later use. According to the sintered ore containing the sintered fly ash balls and the preparation method provided by the invention, the sintering fly ash can be comprehensively utilized, nopollution is caused to the environment, the cost is low, and the performance of the prepared sintered ore can meet the use requirement.

Description

technical field [0001] The invention relates to a method for preparing sintered ore, which specifically belongs to a method for preparing sintered ore containing pellets of sintered dedusting ash. Background technique [0002] During the sintering production process, a large amount of dust will be generated in the process of raw material preparation, sintering ventilation, and crushing and screening of sinter. These dusts contain high iron elements and also contain beneficial ingredients such as alkali metals. According to statistics, the dust generated by the sintering process accounts for 2% to 4% of the sinter output, and the total amount of dust generated by the sintering dust removal system exceeds 15 million tons every year. If the dedusting ash can be treated efficiently and centrally, it will not only save energy and reduce emissions, but also realize the recycling of solid waste resources. [0003] At present, for the application of iron-containing dust, the iron-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/248C22B1/244C22B1/243C22B1/16
CPCC22B1/248C22B1/244C22B1/243C22B1/2406C22B1/16
Inventor 彭道胜沈文俊李军史先菊蒋国波李圣辉
Owner 武汉钢铁有限公司
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