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Thick material layer sintering production method

A sintering method and thick material layer technology, which is applied in the sintering production of ultra-thick material layer, and in the field of sintering production, can solve the problems of lack of oxygen and insufficient heat supply of the upper sintering material layer, so as to improve the quality, reduce the amount of sintering return ore, Effect of increasing heat supply and mineralization time

Active Publication Date: 2020-02-21
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the defects of the prior art, the technical problem to be solved by the present invention (1) is to further increase the thickness of the sintered material layer, solve the problem of insufficient heat supply of the upper sintered material layer, improve the strength of the upper layer of sintered ore, and reduce the amount of sintered ore returned; (2) It is to further increase the thickness of the sintered material layer, solve the problem of oxygen deficiency in the lower sintered material layer, fully mineralize the lower sintered material layer, and improve the quality of the lower sintered ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Fully mix 76% iron ore concentrate, 16% coke powder, 3% binder and 5% oxygen generator, and then add quicklime to it to form a mixture; adjust the amount of quicklime to make the two The base alkalinity is 1.95, add water to the mixture and fully stir and mix in the mixer; the mixed mixture is cold solidified and formed by a briquetting machine, the forming pressure is 30MPa, and the carbon balls with a diameter of 10mm ~ 15mm are prepared Group A. The binder used is bentonite and sodium carboxymethyl cellulose; the oxygen generator used is calcium permanganate.

[0022] Fully mix 68% iron concentrate and 32% bituminous coal, and then add quicklime to it to form a mixture; adjust the amount of quicklime added so that the binary alkalinity of the mixture is 1.95, add water to the mixture in the mixer fully Stir to combine. The mixed material is hot-pressed by a briquetting machine, wherein the molding pressure is 20MPa; the hot-pressing temperature is 570°C; Pellet B....

Embodiment 2

[0027] Fully mix 80% iron concentrate, 10% anthracite, 4% binder and 6% oxygen generator, and then add quicklime to it to form a mixture; adjust the amount of quicklime to make the mixture binary The alkalinity is 2.15, add water to the mixture and fully stir and mix in the mixer; the mixed mixture is cold solidified and formed by a briquetting machine, the forming pressure is 27MPa, and the carbon-containing pellets with a diameter of 8mm to 12mm are prepared a. The adhesive used is water glass and sodium humate; the oxygen generator used is potassium permanganate.

[0028] Fully mix 62% iron concentrate and 38% biochar powder, then add quicklime to it to form a mixture; adjust the amount of quicklime so that the binary alkalinity of the mixture is 2.15, add water to the mixture Mix thoroughly in the machine. The mixed material is hot-pressed by a briquetting machine, wherein the molding pressure is 24MPa; the hot-pressing temperature is 670°C; Pellet B.

[0029] During t...

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Abstract

The invention discloses a thick material layer sintering production method. According to the method, an upper layer sintering mixture and a lower-layer sintering mixed material of a sintering machinecan be sintered at the same time through twice material spreading and twice ignition, so that the thickness of a sintered material layer is improved, the yield of sintered ore is improved, and sintering indexes are improved; after primary material spreading and before secondary ignition, special carbon pellets are placed, so that heat supply and mineralization time of an upper material layer can be increased, the quality of upper-layer sintered ore is improved, and the sintered ore return amount is reduced; and the hypoxia problem of a lower sintered material layer is solved, the lower sintered material layer is fully mineralized, and the quality of lower-layer sintered ore is improved.

Description

technical field [0001] The invention belongs to the technical field of ironmaking production, relates to sintering production technology, in particular to a sintering production method of an ultra-thick material layer. Background technique [0002] During the sintering production process, after the sintering mixture cloth is ignited on the trolley, it will be burned from the surface to the inside by the suction of the exhaust fan, and the burning will be completed from the surface to the surface of the sintering machine trolley. Thick bed sintering is an important and widely used sintering technology, which has the advantages of improving sinter strength and reducing sintering fuel consumption, but the application of thick bed sintering technology also faces some difficulties. [0003] With the thickening of the sintering material layer, the airflow resistance through the material layer increases, and the sintering speed slows down, which not only increases the power consump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/242C22B1/243C22B1/244
CPCC22B1/16C22B1/242C22B1/243C22B1/244
Inventor 张辉夏铁玉周明顺顾颜唐继忠刘帅宫作岩翟立委刘杰徐礼兵
Owner ANGANG STEEL CO LTD
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