Treatment device and method of dedusting ash in sintering electric field

A technology of electric field dust removal and treatment device, which is applied in the fields of chemical production and comprehensive utilization of metallurgical solid waste, can solve the problem that dust removal dust cannot be effectively treated, and achieve the effect of reducing investment cost, effective treatment and easy technology promotion.

Pending Publication Date: 2019-04-02
北京中水信科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a processing device and method for sinte...

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  • Treatment device and method of dedusting ash in sintering electric field
  • Treatment device and method of dedusting ash in sintering electric field
  • Treatment device and method of dedusting ash in sintering electric field

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Embodiment 1

[0053] see figure 1 , the processing device for sintering electric field dedusting ash includes dust removal ash conveying device, leaching tank 3, solid-liquid separation unit 4, pipe chain conveyor 5 and evaporation concentration unit 6, dedusting ash conveying device, leaching tank 3 and solid-liquid separation unit 4 Connected in sequence, the solid material outlet of the solid-liquid separation unit 4 is connected to the pipe chain conveyor 5, and the liquid material outlet of the solid-liquid separation unit 4 is connected to the evaporation concentration unit 6 through a pipeline. The dedusting ash conveying device in this embodiment is a pneumatic conveying pipeline 2, and the leaching tank 3, the solid-liquid separation unit 4, and the evaporation concentration unit 6 are directly assembled on the sintering machine 1, so as to avoid the dedusting ash and the iron content after the potassium fertilizer is extracted from the dedusting ash. Long-distance transportation o...

Embodiment 2

[0080] see image 3 , in this embodiment, the pneumatic conveying pipeline 2 is respectively linked to the fourth electric field dedusting ash discharge port of the head of the sintering machine 1, and the end of the pipeline is connected to the leaching tank 3. After the sintering dust is discharged, it is transported to the leaching tank 3 through a pipeline, and tap water 1.5 times the total weight of the dust is added to stir and leach. After stirring for 30 minutes, the slurry is sent to a plate and frame filter press for pressure filtration, and the obtained filtrate is pumped to the evaporation concentration unit 6 for heat exchange and concentration, and the solid material obtained by pressure filtration is transported to the sintering batching workshop 8 for use through a pipe chain.

[0081] A mechanical vapor recompression device is used to heat and concentrate the leaching solution until the potassium chloride in the leaching solution is saturated, and the steam ob...

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Abstract

The embodiment of the invention relates to the technical field of comprehensive utilization of metallurgical solid wastes, in particular to a treatment device and method of dedusting ash in a sintering electric field. The method comprises the following steps: conveying the dedusting ash; leaching out the dedusting ash; separating solids from liquid; conveying materials which are obtained through solid-liquid separation; performing evaporation and concentration; and performing extraction. The device comprises a pneumatic conveying unit of the dedusting ash, a leaching-out tank, a solid-liquid separation unit, an iron-containing solid material conveying unit, an evaporation and concentration unit, a spray drying unit and a mineral processing and separation unit. According to the processing method disclosed by the invention, a treatment step of the dedusting ash and an extraction step of potassium salt are separated, the leaching-out unit of the dedusting ash, the solid-liquid separationunit, the concentration unit and the drying unit are directly assembled on a sintering machine, salt obtained through spray drying is collected on sites or from different plant areas and is then subjected to mineral processing and extraction in a concentrated manner so as to obtain the potassium salt and non-ferrous metal materials; and thus, technology promotion is facilitated, and the device andthe method disclosed by the invention have the advantages of environmental friendliness, less investment, low energy consumption, simple treatment ways and the like.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of metallurgical solid waste, and also belongs to the technical field of chemical production, in particular to a treatment device and method for sintering electric field dust removal. Background technique [0002] my country is the largest steel producer in the world. Sinter is the main raw material for blast furnace ironmaking in my country, accounting for about 70% to 75% of blast furnace charge. In 2017, my country's iron output was about 710 million tons, and the amount of sinter used was about 800 million. Ton. About 2% to 4% of sintering dust is produced for each ton of sintered ore. The sintering machine adopts electric field dust removal, and the third and fourth electric field dust removal ash at the end of the sintering machine account for about 20% of the total amount of dust removal. Based on this calculation, in 2017, about 4 million tons of dust removal ash with high...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B26/10C22B26/22C22B26/20C22B13/00C22B15/00
CPCC22B7/006C22B7/02C22B13/045C22B15/0089C22B26/10C22B26/20C22B26/22Y02P10/20
Inventor 郭玉华
Owner 北京中水信科技有限公司
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