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Device and method for reducing powder content of lump ore

A technology of powder ratio and lump ore, applied in the field of blast furnace ironmaking, can solve the problems of reducing the powder ratio of lump ore, high lump ore powder ratio, difficulty in screening, etc., so as to reduce the powder ratio of lump ore and improve screening. Efficiency, cost reduction effect

Active Publication Date: 2019-03-29
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for reducing the powder content of lump ore, which mainly solves the technical problems of high powder content and difficult screening of lump ore used in blast furnace ironmaking

Method used

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  • Device and method for reducing powder content of lump ore

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Embodiment 1

[0035] Example 1, taking a sintering machine in a steel factory as an example, the induced draft fan used in the system is SJ1800, the electrostatic precipitator is HHD-30 / 3 / 1, the belt conveyor is SJ20, the vibrating screen is GFS, and the electric plate The valve is ZQ type, all of which are free equipment, and the fume hood, oven, pipeline and silo are made of 304 stainless steel.

[0036] The sintering machine has a total of 22 bellows, and the flue gas from the bellows at 7 / 10-4 / 5, that is, the bellows No. 16 and 17, is extracted for use. The temperature of the flue gas is about 320°C; the area of ​​the bellows is 1.5m 2 , the width of the trolley is 4m, and the area of ​​the fume hood is 6m 2 , with a width of 4m and a length of 1.5m. The amount of lump ore used in the blast furnace matched with the sintering machine is 15.6t / h, and the powder content of the lump ore is 20%. The designed baking furnace bakes 9.8t of lump ore every 30 minutes. The included angle with th...

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Abstract

The invention relates to a device and method for reducing the powder content of a lump ore. The device and method for reducing the powder content of the lump ore mainly solve the technical problems ofhigh powder content and difficult screening of an existing blast furnace ironmaking lump ore. The device for reducing the powder content of the lump ore comprises a sintering machine, a sintering machine air bellow, a sintering flue gas pipeline, a lump ore belt conveyor, and a lump ore bin. The device for reducing the powder content of the lump ore is characterized in that the device further comprises an induced draft fan, a baking furnace, a flue gas hood, a silo, a lump belt conveyor, a vibrating screen riddler, an undersize belt conveyor, a dedusting belt conveyor, and a feeding belt conveyor, wherein the flue gas hood communicates with the sintering flue gas pipeline; the induced draft fan communicates with a gas outlet pipe of the baking furnace through the sintering flue gas pipeline; an electrostatic precipitator is arranged on the sintering flue gas pipe between the induced draft fan and the gas outlet pipe of the baking furnace; and an electric gate valve is arranged on thesintering flue gas pipeline between the gas outlet pipe of the sintering flue gas pipeline and a gas inlet pipe of the baking furnace. The device for reducing the powder content of the lump ore has low manufacturing and operating costs.

Description

technical field [0001] The invention relates to a blast furnace charge processing device, in particular to a device and method for reducing the powder content of lump ore, and belongs to the technical field of blast furnace ironmaking. Background technique [0002] Lump ore has high iron grade and can be smelted directly in blast furnace in iron and steel metallurgy. The price is much lower than pellet ore, so it is widely used; however, the high moisture content of lump ore makes powder easy to adhere to the surface of lump ore, making it difficult to sieve Clean, especially in rainy days and winter, lump ore generally has the problem of high powder content, powder adheres to the sieve, blocks the sieve holes, makes it difficult to sieve lump ore, affects the air permeability of the blast furnace, and brings difficulties to the operation of the blast furnace , so the proportion of lump ore used in blast furnace production is limited. [0003] For the problem of high powder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/00
CPCC22B1/00C22B1/16
Inventor 肖俊军王海军
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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