Sintered ore cooling method adopting pre-sintering

A cooling method and a technology of sintering, which are applied in the field of iron and steel metallurgy, can solve the problems that there is no direct and effective way to improve the cooling efficiency of the ring cooler, and achieve the effects of quality improvement, ring cooling efficiency, and power generation

Inactive Publication Date: 2017-01-18
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, so far, all enterprises can only strengthen the daily technology and production management of the ring cooler, and there is no direct and effective way to improve the cooling efficiency of the ring cooler.

Method used

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  • Sintered ore cooling method adopting pre-sintering
  • Sintered ore cooling method adopting pre-sintering
  • Sintered ore cooling method adopting pre-sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] During the pre-sintering production of the belt roaster, the thickness of the first cloth layer is 500mm, the thickness of the second cloth layer is 200mm, the total thickness of the material layer is 700mm, and the pre-sintering time is 10min. It is installed at the end of the belt roaster. There is a sinter separation device. During the unloading process of the whole trolley, the sinter hits the separation device. The sinter with red fire layer is about 250mm, which is less than or equal to 1 / 2 of the thickness of the total material layer. The about 250mm thick sinter with red fire layer and the temperature ≥ 600°C are separated from the remaining 450mm thick sinter. At the bottom, the red-hot high-temperature sinter is distributed to the upper part of the low-temperature sinter for ring cooling.

[0016] When the operating speed of the annular cooler is constant, the main production results are compared in Table 1.

[0017] Table 1 Comparison of production results ...

Embodiment 2

[0020] During the pre-sintering production of the belt roaster, the thickness of the first cloth layer is 650mm, the thickness of the second cloth layer is 300mm, the total thickness of the material layer is 950mm, and the pre-sintering time is 14min. It is installed at the tail discharge of the belt roaster There is a sinter separation device, and the separation device is 200mm away from the grate bar of the sintering trolley for unloading. During the unloading process of the whole trolley, the sintered ore hits the separation device, and the sintered ore with the red fire layer is about 450mm, which is less than or equal to 1 / 2 of the thickness of the total material layer. The about 450mm thick sinter with glow layer and temperature ≥ 400°C is separated from the remaining 500mm thick sinter, and after being broken by small crushers respectively, the low-temperature sinter without glow is distributed at the bottom of the ring cooler , The red-hot high-temperature sinter is di...

Embodiment 3

[0025] During the pre-sintering production of the belt roaster, the thickness of the first cloth layer is 700mm, the thickness of the second cloth layer is 400mm, the total thickness of the material layer is 1100mm, and the pre-sintering time is 25min. It is installed at the tail discharge of the belt roaster There is a sinter separation device, and the separation device is 250mm away from the unloading sinter trolley grate. During the unloading process of the whole trolley, the sintered ore hits the separation device, and the sintered ore with the red fire layer is about 500mm, which is less than or equal to 1 / 2 of the thickness of the total material layer. The about 500mm thick sinter with red hot layer and temperature ≥ 900°C is separated from the remaining 600mm thick sinter, and after being broken by small crushers respectively, the low-temperature sinter without red hot is distributed at the bottom of the ring cooler , The red-hot high-temperature sinter is distributed t...

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Abstract

The invention discloses a sintered ore cooling method adopting pre-sintering. According to a pre-sintering process involving double material layers and double ignition systems, a sintered ore separating device is arranged in a tail discharging position of a belt type roasting machine, sintered ore which is equal to or higher than 400 DEG C in temperature and has red fire layers and remaining sintered ore without red fire layers are separated into two independent parts which are provided with independent crushing devicescorrespondingly in a matched mode, and after separate crushing, the sintered ore without the red fire layers is distributed at the bottoms of ring cooling machines, and high-temperature sintered ore with red fire layers is distributed to the upper portions of the ring cooling machines; and when the sintered ore is separated, the material layer thickness of the sintered ore with the red fire layers is smaller than or equal to 1/2 of the total material layer thickness. The separating device at the tail of the roasting machine is horizontally moved for adjustment in the operation direction of a sintering trolley along with changes of the thickness of the sintered ore which is equal to or higher than 400 DEG C in temperature and has the red fire layers. By the application of the sintered ore cooling method, sintered ore cooling efficiency is obviously improved, the number of air blowers of the ring cooling machines is reduced, the generating capacity is improved, and the sintering cost is lowered.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and relates to a sintering production method of iron ore, in particular to a sintered ore cooling method using pre-sintering. Background technique [0002] In the sintering process of the belt roaster, the sinter is usually blast-cooled by a ring cooler, and the cooled sinter is transported by the belt into the screening chamber for screening, and the screened finished sinter is transported to the blast furnace by the belt. If the cooling effect of the ring cooler is poor and the temperature of the sintered ore at the unloading place of the ring cooler is high, when it is transported by the belt, it may burn the belt, or cause a fire and cause a serious production safety accident. [0003] Especially when it is necessary to increase the output of sinter ore, thereby increasing the thickness of the material layer, and producing ultra-thick material layers, there is no good way to improve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/22C22B1/26
CPCC22B1/22C22B1/26
Inventor 周明顺唐复平姚林王义栋韩淑峰任子平宫作岩刘杰翟立委张辉徐礼兵
Owner ANGANG STEEL CO LTD
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