Paving method for sintering machine's bilayer bedding materials

A technology for laying bottom material and sintering machine, which is applied in the field of iron ore sintering, can solve the problems of reducing the weight of blast furnace sinter, reducing the high-quality particle size of finished ore, and increasing the process cost, and achieves the effect of reducing the amount of material used for large-sized sinter.

Active Publication Date: 2014-03-19
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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Problems solved by technology

However, if the size of the base material is too large, it will inevitably reduce the high-quality particle size in the finished ore and reduce the weight of the blast furnace sintered ore.
[0003] In the patent document CN1635167A with the publication number "Sintering Less Damaged Small Grains Small Deviated Gap Bottom Material Graining Process", the particle size range of the bottom layer is reduced to 6-8mm. The defect of ore as the bottom material, but the gap between the grate bars is not mentioned in the literature, and according to the process requirements, only the gap between the grate bars is less than 6mm to avoid material leakage from the grate bars, and updating the grate bars and transforming the screening system according to the process requirements will Will increase process cost

Method used

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  • Paving method for sintering machine's bilayer bedding materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The sintered ore is produced by double-layer bottom material method.

[0043] The sintered ore coming out of the blast ring cooler is sent to the primary cooling vibrating screen 1 in the screening room for the first screening. The sieve classification point of the primary cooling vibrating screen 1 is 8mm, and the products of the particle size on the screen enter the secondary The secondary cooling vibrating screen 2 performs secondary screening, and the products under the sieve enter the tertiary cooling vibrating screen 3 in the screening chamber for three screenings; in the secondary screening, the secondary cooling vibrating screen 2 sieves The point is 12mm, and the products of the size below the sieve are sent to the bottom material silo 8 through the bottom material conveying belt P1 as the bottom material of the bottom sieve. The raw materials are transported to the blast furnace; in the third screening, the grading point of the third sieve of the third cold or...

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Abstract

The invention discloses a method for paving bedding materials on a sintering machine before paving a mixed material into the sintering machine. The method includes the steps of: (1) paving a first layer of large bedding material on sintering machine trolley grate bars, with the large bedding material being sintered ore with a particle size of 8-12mm and thickness of 10-20mm; and (2) paving a second layer of small bedding material on the first layer of large bedding material, with the small bedding material being sintered ore with a particle size of 3-8mm and thickness of 10-15mm. The paving method for sintering machine's bilayer bedding materials provided by the invention can reduce consumption of large particle grade sintered ore without changing grate bar interval, improving the output of sintered ore and enhancing the utilization rate of blast furnace ditch return mine.

Description

technical field [0001] The invention belongs to the technical field of iron ore sintering. Specifically, the invention provides a method that can reduce the materials used for large-grained sintered ore, increase the output of sintered ore, and improve the utilization of returned ore under the blast furnace ditch without changing the gap between grate bars. High-efficiency sintering machine double-layer primer method. Background technique [0002] In order to protect the sintering machine trolley and ensure that the material layer is burned through, large-scale sintering machines are paved with 20-40mm thick sintered ore on the sintering machine trolley as the base material, and the mixture is covered on the base material for ignition and sintering. There are contradictory and mutually influencing relationships among the grate bar clearance of the sintering machine trolley, the particle size of the bottom layer, and the air permeability of the material layer. Whether the si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 蒋大均何木光宋剑杜斯宏周章金吴亚明
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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