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Method for cooperated treatment of domestic garbage combustion fly ash through copper smelting and application thereof

A technology of domestic waste incineration and waste incineration fly ash, which is applied in the direction of chemical instruments and methods, process efficiency improvement, solid waste removal, etc., can solve the problems of limited utilization of resources, inability to degrade dioxin, etc., and achieve Reduce processing costs, reduce stacking, and simple operation

Inactive Publication Date: 2018-09-11
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a doping auxiliary material for building materials, it cannot degrade dioxins, and can only play a certain dilution effect on dioxins and heavy metal elements, and the degree of resource utilization is also limited.

Method used

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  • Method for cooperated treatment of domestic garbage combustion fly ash through copper smelting and application thereof
  • Method for cooperated treatment of domestic garbage combustion fly ash through copper smelting and application thereof

Examples

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Embodiment 1

[0027] This embodiment provides a method for cooperating with copper smelting to process domestic waste incineration fly ash, which mainly includes the following steps:

[0028] Composition of a domestic waste incineration plant: CaO 32.74%, Al 2 o 3 1.55%, SiO 2 8.79%, K 2 O4.67%, Na 2 O 4.84%, Cl 14.12%. The above garbage incineration fly ash was taken, washed with water at 20°C for 1.5 hours, and dried at 60°C for 2 hours. Composition of fly ash after water washing: CaO 45.91%, Al 2 o 3 3.26%, SiO 2 14.15%, K 2 O 0.29%, Na 2 O 0.41%, Cl 0.46%.

[0029] During the copper smelting process, the composition of the copper concentrate fed into the furnace is 25.90% Cu, 24.51% Fe, 33.27% S, 6.15% Zn, and 2.25% Pb. The amount of fly ash added to 1 ton of concentrate is 0.01 tons (the mass ratio of fly ash to copper concentrate is 1:100), and the smelting is carried out under the condition of 1200 ℃, and the dioxin is completely decomposed to produce 0.54 tons of slag....

Embodiment 2

[0031] This embodiment provides a method for cooperating with copper smelting to process domestic waste incineration fly ash, which mainly includes the following steps:

[0032] Composition of a domestic waste incineration plant: CaO 32.74%, Al 2 o 3 1.55%, SiO 2 8.79%, K 2 O4.67%, Na 2 O 4.84%, Cl 14.12%. The above garbage incineration fly ash was taken, washed with water at 30°C for 0.5 hour, and dried at 80°C for 1 hour. Composition of fly ash after water washing: CaO 41.95%, Al 2 o 3 2.43%, SiO 2 14.24%, K 2 O 0.25%, Na 2 O 0.40%, Cl 0.42%.

[0033] During the copper smelting process, the composition of the copper concentrate fed into the furnace is 25.90% Cu, 24.51% Fe, 33.27% S, 6.15% Zn, and 2.25% Pb. Add 0.1 tons of fly ash to 1 ton of concentrate (mass ratio of waste incineration fly ash to copper concentrate is 1:10), and smelt at 1400°C. Dioxins are completely decomposed and 0.58 tons of slag is produced. The composition of the obtained matte is: CuS6...

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Abstract

The invention provides a method for cooperated treatment of domestic garbage combustion fly ash through copper smelting and application thereof, and relates to the technical field of resource recovery. The method for cooperated treatment of domestic garbage combustion fly ash through copper smelting comprises the following steps of smelting the domestic garbage combustion fly ash which is washed by water and dried and copper concentrate, wherein the domestic garbage combustion fly ash comprises the major ingredients of CaO and SiO2; meanwhile, dioxin and heavy metal elements are contained; thecontents of K, Na and Cl are low; during the cooperated treatment of the fly ash, no influence is caused on the copper smelting process and products. The method has the advantages that the operationis simple; the harmless treatment and resource utilization of the domestic garbage combustion fly ash are realized; the copper melting cost is reduced; the environment pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of resource recovery, and in particular to a method and application of copper smelting for co-processing domestic waste incineration fly ash. Background technique [0002] With the improvement of the living standards of Chinese urban residents and the degree of urban modernization, China's domestic waste disposal is in a transition period from landfill-based to incineration-based. At the end of 2015, the total amount of domestic waste incineration and treatment in the country reached 65.77 million tons, accounting for 34% of the total amount of harmless treatment. According to related reports, by 2020, domestic waste incineration capacity will account for 50% of the harmless treatment capacity, and the average daily disposal capacity of domestic waste will reach 59.1 tons, which will generate 6.5-11 million tons of waste incineration fly ash per year. [0003] Because a large amount of dioxins and heavy met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00B09B3/00
CPCC22B15/0028B09B2101/30B09B3/40Y02P10/20
Inventor 王文祥王晓阳李宝花方红生黄玲
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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