Smelting method of high-indium high-iron zinc concentrate

A smelting method, high-iron-zinc technology, applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of large volatilization kiln processing capacity, low recovery rate of indium smelting, low primary zinc leaching rate, etc., and achieve considerable economic benefits , Eliminate adverse effects, and have remarkable energy-saving effects

Active Publication Date: 2014-02-26
LAIBIN CHINA TIN SMELTING
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: (1) the primary leaching rate of zinc is low, and the volatilization kiln has a large processing capacity; (2) due to the large volatilization kiln processing capacity, a large amount of coal char needs to be consumed; (3) the recovery rate of indium is low , only 75%, affecting the benefit
The main disadvantages of this method are: (1) The amount of alum slag is large, and a large amount of coke needs to be consumed in the reduction and volatilization treatment in the rotary kiln, which leads to high production costs; The average content of In in the rotary kiln slag is 0.03%, which makes the indium, which accounts for about...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Smelting method of high-indium high-iron zinc concentrate

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0028] This embodiment is the first example of the smelting method of the high-indium and high-iron-zinc concentrate described in the present invention, comprising the following steps:

[0029] (1) Boiling roasting: add zinc concentrate containing 0.03% In, 12% Fe, and 40% Zn into 109m 2 The fluidized furnace is used for roasting, the roasting temperature is 880°C, and the roasting output is 67000Nm 3 / h sulfur dioxide flue gas and 28t / h calcine, sulfur dioxide flue gas to produce sulfuric acid;

[0030] (2) Neutral leaching: calcined sand is added to the first tank of five series-connected neutral continuous leaching tanks at a rate of 28t / h, and the total volume of each neutral leaching tank is 80m 3 , the effective volume is 75m 3 , meanwhile, with 65m 3 Add a sulfuric acid solution with a concentration of 210g / L at a speed of 210g / L, and carry out leaching at a leaching temperature of 55°C, a leaching time of 2.0h, and a leaching end point of pH 5.0, and produce 59.0m o...

no. 2 example

[0040] This embodiment is the second example of the method for smelting high-indium and high-iron-zinc concentrate according to the present invention, which includes the following steps:

[0041] (1) Boiling roasting: zinc concentrate containing 0.11% In, 16% Fe, and 45% Zn, adding 109m at a rate of 28t / h 2 The fluidized furnace is used for roasting, the roasting temperature is 900°C, and the roasting output is 65000Nm 3 / h sulfur dioxide flue gas and 26.2t / h calcine, sulfur dioxide flue gas to produce sulfuric acid;

[0042] (2) Neutral leaching: calcined sand is added to the first tank of five series-connected neutral continuous leaching tanks at a rate of 26.2t / h, and the total volume of each neutral leaching tank is 80m 3 , the effective volume is 75m 3 , meanwhile, with 70m 3 Add sulfuric acid solution with a concentration of 225g / L at a speed of 225g / L into the first neutral leaching tank, and carry out leaching under the conditions of leaching temperature 65°C, leach...

no. 3 example

[0052] This embodiment is a third example of a method for smelting a high-indium and high-iron-zinc concentrate according to the present invention, which includes the following steps:

[0053] (1) Boiling roasting: zinc concentrate containing 0.20% In, 20% Fe, and 50% Zn, adding 109m 2 The fluidized furnace is used for roasting, the roasting temperature is 940°C, and the roasting output is 64000Nm 3 / h sulfur dioxide flue gas and 23t / h calcine, sulfur dioxide flue gas to produce sulfuric acid;

[0054] (2) Neutral leaching: calcined sand is added to the first tank of five series-connected neutral continuous leaching tanks at a rate of 23t / h, and the total volume of each neutral leaching tank is 80m 3 , the effective volume is 75m 3 , at the same time, every 65m 3 Add a sulfuric acid solution with a concentration of 240g / L to the first neutral leaching tank at a rate of 1 / h, leaching under the conditions of a leaching temperature of 75°C, a leaching time of 3.0h, and a pH of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a smelting method of high-indium high-iron zinc concentrate, which comprises the following steps: carrying out boiling-bed roasting on high-indium high-iron zinc concentrate, carrying out neutral leaching on the obtained roasted product, and carrying out purifying electrolysis on the neutral leaching solution to produce electrodeposited zinc; washing the neutral leaching slag with countercurrent water, returning the washing water to the neutral leaching preparation solution, carrying out strong-reduction smelting on the washed slag to produce a crude zinc alloy, sending the crude zinc alloy into a lead tower to perform distillation, sending the obtained zinc cadmium alloy into a cadmium tower to perform secondary distillation, carrying out casting cooling on the produced distilled zinc to obtain a zinc ingot product, distilling the high-cadmium zinc alloy in a low-temperature tower, using the obtained crude cadmium for producing a cadmium ingot, and returning the low-cadmium zinc alloy to the cadmium tower for distillation; and distilling the zinc indium bottom solution in a high-temperature tower, returning the produced high-temperature crude zinc to the lead tower for distillation, and carrying out crushing, leaching, extraction, replacement and electrolysis on the high-indium alloy to extract the indium. The method has the advantages of reasonable technique, clean and environment-friendly process, less emission of three wastes, high production efficiency and low production cost.

Description

technical field [0001] The invention relates to a method for smelting nonferrous metals, in particular to a method for smelting high-indium and high-iron-zinc concentrates. Background technique [0002] At present, there are two main smelting methods for extracting zinc and indium from zinc concentrates containing 0.03-0.20% In, 12-20% Fe, and 40-50% Zn: [0003] The first smelting method is to use the conventional leaching wet process. The process adopts "Zinc Concentrate Boiling Furnace Roasting and Desulfurization-Neutral and Low-acid Zinc Calcined Secondary Countercurrent Leaching--Middle and Supernatant Solution Purification Electrowinning Production of Electrolytic Zinc-Low-acid Leach Slag Reduction Volatilization and Recovery of Zinc Indium" wet zinc smelting craft. Using this process, zinc and indium are effectively recovered, the recovery rate of zinc reaches 94%, and the recovery rate of indium reaches 75%. The waste residue in the production process has been har...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22B3/08C22B19/04C22B19/02C25C1/16
CPCY02P10/20
Inventor 吴鋆
Owner LAIBIN CHINA TIN SMELTING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap