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Steel smelting tailing treatment process

A treatment process, iron and steel smelting technology, applied in the field of iron and steel smelting tailings treatment process, can solve the problems of lack of treatment methods for tailings, low utilization rate of resources, etc.

Inactive Publication Date: 2021-08-31
王庆乐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, in view of the above content, the present invention provides a treatment process for iron and steel smelting tailings, which solves the problems of lack of effective treatment methods for tailings generated in the existing iron and steel smelting process and low utilization rate of resources

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  • Steel smelting tailing treatment process

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Effect test

Embodiment 1

[0025] refer to figure 1 , a iron and steel smelting tailings treatment process, including the following steps: sending the tailings to the receiving bin through the loader, and then sending the tailings to the permanent magnetic drum through the No. 1 belt conveyor for initial magnetic separation, and the magnetic strength is 1000mT, separate the magnetic tailings A and tailings a, and the tailings a is transported to the bar sieve by No. 2 belt conveyor for screening to obtain tailings b with a particle size of less than 50mm and tails c with a particle size greater than 50mm. The tailings c are sent to the hydraulic jaw crusher for crushing, and then sent to the bar screen again after crushing, and the circular screening is continued. The tailings b are sent to the conveyor through No. 3 belt conveyor and No. 1 bucket elevator in turn. Drying is carried out in a rotary dryer. The high-temperature flue gas required by the rotary dryer is provided by a fluidized fluidized fur...

Embodiment 2

[0028]A treatment process for iron and steel smelting tailings, including the following steps: sending the tailings to the receiving bin through a loader, and then sending the tailings to a permanent magnetic drum through a No. 1 belt conveyor for initial magnetic separation, and the magnetic strength is 1200mT , the magnetic tailings A and tailings a are separated, and the tailings a is transported to the bar sieve by No. 2 belt conveyor for screening to obtain tailings b with a particle size less than 80 mm and tails c with a particle size greater than 80 mm. The tailings c are sent to the hydraulic jaw crusher for crushing, and then sent to the bar screen again after crushing to continue the circular screening. The tailings b are sent to the rotary conveyor through No. 3 belt conveyor and No. 1 bucket elevator in turn. The high temperature flue gas required by the rotary dryer is provided by a fluidized fluidized furnace, which uses coal gangue as fuel, and the dried tailing...

Embodiment 3

[0030] A treatment process for iron and steel smelting tailings, including the following steps: sending the tailings to the receiving bin through a loader, and then sending the tailings to a permanent magnetic drum through a No. 1 belt conveyor for initial magnetic separation, and the magnetic strength is 1500mT , the magnetic tailings A and tailings a are separated, and the tailings a is transported to the bar sieve by No. 2 belt conveyor for screening to obtain tailings b with a particle size less than 100 mm and tails c with a particle size greater than 100 mm. The tailings c are sent to the hydraulic jaw crusher for crushing, and then sent to the bar screen again after crushing to continue the circular screening. The tailings b are sent to the rotary conveyor through No. 3 belt conveyor and No. 1 bucket elevator in turn. The high temperature flue gas required by the rotary dryer is provided by a fluidized fluidized furnace, which uses coal gangue as fuel, and the dried tail...

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Abstract

The invention relates to the technical field of steelmaking tailing treatment, and provides a steel smelting tailing treatment process. The process comprises the following steps: feeding tailings into a permanent magnetic roller for primary magnetic separation to separate out magnetic tailings A and tailings a, and screening through a bar screen to obtain tailings b with the particle size smaller than screen holes and tailings c with the particle size larger than the screen holes; performing drying and secondary magnetic separation on the tailings b to obtain magnetic tailings B and tailings d, sequentially performing coarse grinding through a rod mill and fine grinding through a vertical mill on the tailings d to obtain tailings powder with the specific surface area being 420 m < 2 > / kg or above, uniformly stirring and mixing the tailings powder and carbonized sludge, and then putting the mixture into a calcining furnace to be calcined to obtain the tailings recycled material. The problems that an effective treatment method for tailings generated in the existing steel smelting process is lacked and the resource utilization rate is low are solved, the tailings recycled material serving as a mineral admixture is applied to concrete to replace part of cement, and the use amount of the cement is reduced.

Description

technical field [0001] The invention relates to the technical field of steelmaking tailings treatment, in particular to a process for treating iron and steel smelting tailings. Background technique [0002] The tailing slag produced in the iron and steel smelting process is divided into converter steel slag, open hearth furnace steel slag and electric furnace steel slag, among which converter slag accounts for a large proportion. At present, more than 70% of the tailing slag discharged in my country is converter slag. The effective utilization rate of tailings in my country is only about 10%, and most of the tailings are discarded and piled up without treatment, which not only causes a great waste of resources, seriously restricts the development of circular economy in steel mills, but also occupies a large amount of land, which is harmful to the surrounding environment, water and adverse effects on soil. With the rapid development of the iron and steel industry, the dischar...

Claims

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Application Information

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IPC IPC(8): B02C21/00B03C1/30B07B1/46C04B18/02C04B28/14C04B111/00
CPCB02C21/00B03C1/30B07B1/4609C04B18/023C04B28/14C04B2111/00017C04B2201/50C04B14/02C04B18/141C04B7/02C04B2103/302
Inventor 王庆乐
Owner 王庆乐
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