A method for recovering lead, zinc, indium and copper from smelting zinc leaching slag with oxygen-enriched circulating fluidized bed reactor

A technology of circulating fluidized bed and zinc leaching slag, applied in the field of metal smelting, can solve the problems of wear of refractory materials on blast furnace walls, inability to control the temperature and pressure of fuel in the blast furnace in real time, waste, etc. Reaction efficiency, effect of reducing production cost

Active Publication Date: 2017-03-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature and pressure of the fuel in the furnace cannot be controlled in real time by using the blast furnace, and the fuel also wears the refractory material of the blast furnace wall, causing unnecessary waste

Method used

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  • A method for recovering lead, zinc, indium and copper from smelting zinc leaching slag with oxygen-enriched circulating fluidized bed reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, the method for reclaiming lead-zinc-indium-copper by oxygen-enriched smelting zinc leaching slag in a circulating fluidized bed reactor, its concrete steps are as follows:

[0021] Step 1. First, grind 1000g of zinc leaching slag until the particle size is 5 mesh, accounting for more than 80%, mix the grinding and water evenly according to the mass ratio of 90:10, and then make pellets in a disc pelletizer to obtain a pellet with a diameter of 5mm zinc leaching slag clusters, the zinc leaching slag clusters are ventilated and naturally dried for later use; the zinc leaching slag includes the following mass percentage components: Zn15%, Pb2.8%, Cd0.1%, Cu0.8%, Fe1. 5%, Ag0.022%, In0.03% and S4%.

[0022] Step 2. Mix the zinc leaching slag and coke ding obtained in step 1 evenly according to the mass ratio of 1:1, then add it into the circulating fluidized bed through the primary air, and then blow in the secondary air with a volume ratio of ox...

Embodiment 2

[0027] Such as figure 1 As shown, the method for reclaiming lead-zinc-indium-copper by oxygen-enriched smelting zinc leaching slag in a circulating fluidized bed reactor, its concrete steps are as follows:

[0028] Step 1. First, grind 1000g of zinc leaching slag until the particle size is 5 mesh, accounting for more than 80%. Mix the grinding and water evenly according to the mass ratio of 92:8, and then make pellets in a disc pelletizer to obtain a pellet with a diameter of 20mm zinc leaching slag agglomerate, the leaching leaching slag ore is ventilated and naturally dried for later use; the zinc leaching slag includes the following mass percentage components: Zn25%, Pb3.5%, Cd0.3%, Cu1.5%, Fe10% , Ag0.03%, In0.08% and S8%.

[0029] Step 2. Mix the zinc leaching slag and coke ding obtained in step 1 evenly according to the mass ratio of 1:1, and then add it into the circulating fluidized bed through the primary air, and then blow in the volume ratio of oxygen and air at a ...

Embodiment 3

[0032] Such as figure 1 As shown, the method for reclaiming lead-zinc-indium-copper by oxygen-enriched smelting zinc leaching slag in a circulating fluidized bed reactor, its concrete steps are as follows:

[0033] Step 1. First, grind 1000g of zinc leaching slag until the particle size is 5 mesh, accounting for more than 80%. Mix the grinding and water evenly according to the mass ratio of 92:8, and then make pellets in a disc pelletizer to obtain a pellet with a diameter of 12.5mm zinc leaching slag agglomerate, the leaching leaching slag ore is ventilated and naturally dried for later use; the zinc leaching slag includes the following mass percentage components: Zn20%, Pb3.15%, Cd0.2%, Cu1.15%, Fe5 .75%, Ag0.025%, In0.055% and S6%.

[0034] Step 2. Mix the galvanized slag and coke slag obtained in step 1 evenly in a mass ratio of 1:1, then add it into the circulating fluidized bed through the primary air, and then blow in the secondary air with a volume ratio of oxygen and...

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Abstract

The invention relates to a method for recovering lead-zinc-indium-copper by the use of circulating fluidized bed reactor oxygen-enriched smelting zinc-leaching residues and belongs to the field of a metal smelting technology. The method comprises the following steps: grinding zinc-leaching residues to more than 80% of 5-mesh granules, uniformly mixing ground ore with water, briquetting in a disk briquetting machine to obtain zinc-leaching residue briquette with diameter being 5-20 mm, naturally drying the zinc-leaching residue briquette through ventilation for later use; uniformly mixing the zinc-leaching residue briquette with coke nut, ventilizing and adding the mixture into a circulating fluidized bed, introducing secondary air to carry out an oxidation reaction to obtain main substances including dust phases and slag phases of ZnO, PbO, InO2 and CuO; and discharging the slag phases through a slagging tube, processing Fe, Ag metals in the slag, and sending the rest to a building materials factory to be used as building materials. According to the method, by the circulating fluidized bed oxygen-enriched smelting technical principle, valuable metal recovery rate of zinc-leaching residues is effectively enhanced. Meanwhile, by introduction of oxygen, thermal reaction efficiency is raised, and production cost is reduced.

Description

technical field [0001] The invention relates to a method for recovering lead-zinc-indium-copper from oxygen-enriched smelting zinc leaching slag in a circulating fluidized bed reactor, belonging to the technical field of metal smelting. Background technique [0002] Zinc leaching slag is a solid waste slag produced in the process of hydrometallurgy. It contains valuable metal elements such as zinc, lead, copper, gallium, germanium, indium and silver, and has great comprehensive utilization value. The circulating fluidized bed reaction device is a chemical device that uses the combustion principle of gas-solid two-phase flow to react, and it mainly includes a fluidized bed reactor, an air supply device, a gas-solid separator, a feed and return device, and a heat exchanger Wait. The current air supply for the fluidized bed is mainly divided into two parts, one is the main air supply part (primary air) under the air distribution plate, and the other is the auxiliary air supply...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B13/00C22B19/30C22B58/00C22B15/00
CPCY02P10/20
Inventor 卿山赵荣王明悦俞亚冕刘艺琴王华杨舒萍廖斌金开文张小辉
Owner KUNMING UNIV OF SCI & TECH
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