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Dust-separation zinc extraction method

A technology for blast furnace dust removal and raw materials, which is applied in the field of dust removal and dust treatment, can solve the problems of difficulty in handling, dust removal dust affects the environment, waste of resources, etc., and achieves the effect of improving the utilization rate of resources

Inactive Publication Date: 2009-01-14
NANJING BANQIAO SLAG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: dust removal affects the environment and is not easy to handle; it contains usable components, and it is directly discarded to waste resources

Method used

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  • Dust-separation zinc extraction method
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Embodiment Construction

[0010] The dedusting ash used in the present invention is mainly four kinds of blast furnace dedusting ash, power plant dedusting ash, blast furnace gas mud and anthracite.

[0011] According to the weight ratio of 34% of blast furnace dust removal, 30% of power plant dust removal, 30% of blast furnace gas mud, and 6% of anthracite, the loader is used to mix and mix well, and then the materials are evenly sent to the rotary kiln for heating and refining by a conveyor, such as figure 2 , the rotary kiln body has a total length of 36.8 meters, an outer diameter of 2.5 meters, and a rotating speed of 2-3 rpm. A gas burner and a blower are installed at the kiln head (slag outlet), and the excess gas from the blast furnace or coke oven is used to enter The gas pipeline is fed into the burner and mixed with the wind from the blower, and the automatic ignition method of electronic ignition is used to ignite the gas and spray it into the kiln for combustion. In this way, the coal con...

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Abstract

Disclosed is a dust removal and zinc extraction method. Raw materials are mixed and evenly stirred through a loader according to weight proportion, 30 percent to 40 percent of blast furnace dust removal ashes, 25 percent to 35 percent of power plant dust removal ashes, 25 percent to 35 percent of blast furnace gas slime, 5 percent to 10 percent of anthracite coal are evenly delivered to a rotary kiln to be heated for refining through a conveyor, then are delivered into a dedusting chamber to experience the atomization and separation, the raw materials are delivered into a cooling pond then and zinc oxide powder is forcedly sent into a dust collecting chamber by a suction blower, the dust is collected through a bag and is supplied to a zinc supply smeltery as the raw material. The iron residues separated in the heating and extracting process in the rotary kiln are magnetically separated through a magnet separator, the iron residues with the iron content of 60 percent are delivered to an iron smelting plant, and the residue soil is supplied to a cement plant as the raw material. The invention has the advantages that the iron residues and zinc powder are extracted and separated through adopting the processed waste material dust removal ashes in large-scale smelting enterprises, the purpose of changing wastes into valuables is realized, and the resource utilization rate is enhanced.

Description

technical field [0001] The invention relates to a treatment method for dedusting ash, in particular to a method for extracting zinc from dedusting ash. Background technique [0002] Dust removal ash is a kind of ash powder that comes down from the dust collector according to the process requirements of smelting production. Before the equipment is fully utilized, it cannot be stacked and processed, and it seriously affects the surrounding environment. After new research and analysis, it is found that the dust itself has multiple components, such as 10% zinc, 20-25% iron, and 10% coal, which need to be reused. Contents of the invention [0003] The technical problem to be solved by the present invention is: the dust from dust removal affects the environment and is not easy to handle; it contains usable ingredients, so it is directly discarded to waste resources. [0004] The technical scheme of the present invention is: the method for extracting zinc from dedusting ash, mix...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/30B03C1/02C04B18/14
CPCY02P10/20Y02W30/91
Inventor 汪根海
Owner NANJING BANQIAO SLAG
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