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Energy saving additives for sintering and their applications

A technology of additive and sintering flux, which is applied in the field of sintering energy-saving additives, can solve the problem of high cost, reduce fuel consumption, improve sintering utilization coefficient, and realize the effect of combustion support

Active Publication Date: 2016-01-20
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned patents, the sludge used in the sintering is lime calcified sludge obtained by lime drying, and the cost is relatively high because quicklime is mixed with the sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The limestone powder with a particle size of ≤1mm is mixed with the massive sludge with a moisture content of 70% obtained by dehydration of the plate and frame filter press at a mass ratio of 50%:50%, and after mixing evenly, the natural air drying method is used to achieve the drying of the mixture. Then the mixed material is crushed and sieved to a particle size of ≤3mm to obtain the additive.

[0013] Then the additives are mixed into the mixture with a mass ratio of 5%, and then the thick material layer with a thickness of 650mm is sintered. The sintering test results show that: compared with the sintering method without adding additives and using a 550mm non-thick material layer, the sintering utilization coefficient increases by 15.6%, and the solid fuel consumption decreases by 4.2kg / T.

Embodiment 2

[0015] Mix limestone powder with a particle size of ≤1mm and lumpy sludge with a moisture content of 55% obtained by plate and frame filter press dehydration at a mass ratio of 60%:40%. After mixing evenly, use natural air drying to dry the mixture, and then The mixed material is crushed and sieved to a particle size of ≤3mm to obtain the additive.

[0016] Then the additives are mixed into the mixed material with a mass ratio of 2%, and then the thick material layer with a thickness of 700mm is sintered. The sintering test results show that: compared with the sintering method without adding additives and using a 550mm non-thick material layer, the sintering utilization coefficient increases by 10.3%, and the solid fuel consumption decreases by 2.2kg / T.

Embodiment 3

[0018] Limestone powder with a particle size of ≤1mm is mixed with lumpy sludge with a water content of 60% obtained by plate and frame filter press dehydration at a mass ratio of 80%:20%. After mixing evenly, natural air drying is used to achieve the drying of the mixture, and then The mixed material is crushed and sieved to a particle size of ≤3mm to obtain the additive.

[0019] Then the additives are blended into the mixed material at a mass ratio of 2%, and then the thick material layer with a thickness of 600mm is sintered. The sintering test results show that: compared with the sintering method without adding additives and using a 550mm non-thick material layer, the sintering utilization coefficient increases by 6.2%, and the solid fuel consumption decreases by 1.5kg / T.

[0020] The energy-saving additive for sintering provided by the present invention uses limestone powder as the inorganic material, and the mixing with water belongs to physical mixing without chemical ...

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Abstract

The invention belongs to sintering energy-saving technologies, and particularly relates to an energy-saving additive for sintering. The sintering energy-saving additive is composed of the following components in percentage by weight: 50-80 percent of a sintering flux and 50-20 percent of a combustible material, wherein the sintering flux is limestone; the combustible material is dewatered municipal sludge. According to the energy-saving additive, materials comprising the flux and combustible material are premixed, uniformly mixed and powdered to act as the additive which is used in a sintering process by using a thick material layer sintering way; the energy-saving additive has the advantages of improving sintering utilization coefficient, reducing sintering solid fuel consumption, and achieving efficient and energy-saving sintering production.

Description

technical field [0001] The invention belongs to the technical field of sintering energy saving, and in particular relates to an energy saving additive for sintering and its application. Background technique [0002] Iron ore powder sintering is the most important agglomeration technology in metallurgical production at present, and it is called artificial rich ore together with pellet ore. High-quality sinter can improve the smelting conditions of the blast furnace, which is conducive to the smooth operation of the blast furnace and the improvement of iron output and quality. As the main raw material for blast furnace production, sinter plays an important role in blast furnace production, especially in the context of the rapid development of my country's iron and steel enterprises in recent years, the annual output of sinter is hundreds of millions of tons. [0003] Sinter is not a single body, but a system composed of clotted materials with different compositions and struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
Inventor 余广炜岳昌盛崔金印邢奕洪晨
Owner SHOUGANG CORPORATION
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