Method for smelting lead-containing waste and copper-containing waste synchronously in molten pool

A molten pool smelting and copper scrap technology, applied in the field of synchronous extraction of heavy metals and pyrometallurgy, can solve the problems of low-value by-products, secondary pollution, complicated operation, etc., and achieve the effect of low cost, high added value and simple treatment

Active Publication Date: 2014-03-26
CENT SOUTH UNIV
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Problems solved by technology

However, this method needs to add the matte phase used for slag washing, which can only treat the slag intermittently, with high energy consumption and complicated operation
[0005] To sum up, the current treatment process of lead-containing or copper-containing waste only targets a single lead-containing or copper-containing waste. The treatment process requires the addition of a large number of auxil

Method used

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  • Method for smelting lead-containing waste and copper-containing waste synchronously in molten pool

Examples

Experimental program
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Effect test

Example Embodiment

[0033] Example 1:

[0034] Lead-containing waste is copper converter soot, and its composition is shown in Table 1:

[0035] Table 1 Main chemical composition of lead-containing waste (%)

[0036] Pb

[0037] Copper-containing waste is copper electroplating sludge, and its composition is as shown in Table 2:

[0038] Table 2 Main chemical composition of copper-containing scrap (%)

[0039] Cu

[0040] Water quenching slag contains Fe25.58%, SiO 2 22.6%, CaO21.3%.

[0041] Mix 100g of the above-mentioned lead-containing waste, 212g of copper-containing waste, 21.5g of quartz sand, 78.9g of iron flux, and 23g of anthracite, and then add a small amount of water to stir and granulate. For the charge. Among them, quartz sand contains SiO 2 96%, particle size 0.1-1mm; iron flux is iron ore powder, Fe70%, particle size 0.5-2mm; fixed carbon content of anthracite is 60%, particle size is 3-5mm.

[0042]Put 500 g of the above-mentioned water-quenched slag int...

Example Embodiment

[0044] Example 2:

[0045] The lead-containing waste is the lead sludge produced by the lead-zinc smelter, and its composition is shown in Table 3:

[0046] Table 3 Main chemical composition of lead-containing waste (%)

[0047] Pb

[0048] The copper-containing waste is copper smelting converter slag, and its composition is shown in Table 4:

[0049] Table 4 Main chemical composition of copper-containing scrap (%)

[0050] Cu

[0051] Water quenching slag contains Fe25.58%, SiO 2 22.6%, CaO21.3%.

[0052] Mix 100g of the above-mentioned lead-containing waste, 64.51g of copper-containing waste, 10g of quartz sand, 26.4g of iron-containing flux, and 11.46g of coke particles, and then add a small amount of water to stir and granulate. %. Among them, the iron-containing flux is iron slag, containing 55% Fe, with a particle size of 0.5-5mm; quartz sand, containing SiO 2 96%, the particle size is 0.1-1mm; the fixed carbon content of coke particles is 80%, ...

Example Embodiment

[0055] Example 3:

[0056] Lead-containing waste is waste lead-acid battery lead paste mud, and its composition is shown in Table 5:

[0057] Table 5 Main chemical composition of lead-containing waste (%)

[0058] Pb

[0059] The copper-containing waste is electro-zinc sewage treatment sludge, and its composition is as shown in Table 6:

[0060] Table 6 Main chemical composition of copper-containing scrap (%)

[0061] Cu

[0062] Water quenching slag contains Fe25.58%, SiO 2 22.6%, CaO21.3%.

[0063] Mix 100g of the above lead-containing waste, 30.45g of copper-containing waste, 16.5g of quartz sand, 38.79g of anthracite, and 9g of limestone. After fully mixing, add a small amount of water to stir and granulate. Control the particle size to 20-50mm and control the water content to 6-8%. Among them, quartz sand, containing SiO 2 96%, particle size 0.1~1mm, limestone, CaCO 3 The content is greater than 85%, and the particle size is 0.05-2mm; the fixed c...

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Abstract

This invention provides a method for smelting lead-containing waste and copper-containing waste synchronously in a molten pool. The method comprises the following steps: (1) mixing the lead-containing waste, the copper-containing waste, one or more fluxes and carbon-containing reducing agents and then pelletizing, wherein the ratio of the lead-containing waste and copper-containing waste is controlled to achieve the effect that the mass ratio of (Cu+Fe):S is (1.75-4):1; (2) adding the mixture to the smelting equipment (i.e. the molten pool), wherein the mass ratio of water-quenched slag to the furnace burden (i.e. the mixture) is (0.7-5):1, and the smelting temperature is 1050-1250 DEG C; (3) keeping the smelting temperature for 30-180 min for separating and clarifying lead alloy, copper matte and smelting slag. According to the invention, the method can be used for treating the lead-containing waste and the copper-containing waste synchronously; the process is efficient and simple; the direct recovery rates of lead and copper can reach above 75% respectively; the metal content of the generated slag is low, and the slag can be used as a building raw material; the extraction and separation of lead, copper and other elements in the wastes can be realized through one step; the lead is concentrated in the lead alloy, and the copper is concentrated in the copper matte; the product additional value is high; the subsequent processing is simple.

Description

technical field [0001] The invention belongs to pyrometallurgy in the field of heavy metal pollution control, and in particular relates to a method for synchronously extracting heavy metals from waste materials containing lead and copper. Background technique [0002] Heavy metal waste is mostly leaching slag, slag, sludge, soot, etc. produced in the metallurgical process. Its composition is complex, including copper, nickel, lead, zinc and other valuable metals. According to its main metal composition, it can be divided into Lead-containing scrap, copper-containing scrap, etc. The traditional heavy metal waste treatment method is to prevent the leakage of harmful elements in the waste through solidification and landfill. In recent years, with the increasing requirements for resource recycling, it has gradually become the main development direction of heavy metal waste treatment to adopt targeted metallurgical methods to extract valuable metal elements according to the wast...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B7/04C22B13/02C22B15/00
CPCY02P10/20
Inventor 杨天足陈霖张杜超刘伟锋郝占东宾舒宾万达
Owner CENT SOUTH UNIV
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