Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for all-wet recovery of valuable elements in complex low-grade sulphide ore

A valuable element, low-grade technology, applied in the direction of improving process efficiency, can solve the problems of small and medium-sized enterprises such as economic loss, incomplete metal separation, long process flow, etc., to achieve good treatment effect, low equipment investment requirements, and clean process. Environmentally friendly effect

Active Publication Date: 2017-09-22
JIANGXI COPPER CORP
View PDF7 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most non-ferrous metal minerals belong to sulfide ores. For the treatment of complex low-grade sulfide ores, large enterprises usually adopt pyrotechnics. Blister copper is produced, and then refined copper is produced by electrolytic refining. The fire process has problems such as incomplete metal separation, serious environmental pollution, long process flow, high production cost, and large energy consumption. The load of the system has requirements, and small and medium-sized enterprises generally sell their complex low-grade sulfide ore as raw materials to large enterprises. Since this mineral does not meet any kind of concentrate standard, the valuation coefficient of the metal contained in it is often very low Yes, even some metals are not priced at all, resulting in huge economic losses for small and medium-sized enterprises

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
  • Process for all-wet recovery of valuable elements in complex low-grade sulphide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 300g of lead matte that has been crushed and ground through a 50-mesh sieve, mix it with 3.0L of 90g / L sodium hydroxide solution and pour it into a pressurized reaction kettle. After entering the oxygen pressure to 0.65MPa, the temperature was raised to 120°C, and the total pressure was 1.15MPa. After reacting for 3.0 hours, the kettle was discharged, and the alkali leaching solution and alkali leaching residue were obtained by filtration. Add sulfuric acid to the alkaline immersion solution to adjust the pH to 6, filter to obtain lead sulfate precipitation and lead sinking solution, wash the lead sulfate precipitate with dilute sulfuric acid and dry to obtain lead sulfate product, the lead recovery rate is 99.6%, and heat the lead sinking solution to 60°C , monitor the potential of the reaction solution while adding oxalic acid solid, stop adding oxalic acid when the potential of the reaction solution is 600mV, filter the coarse selenium powder and selenium-reduced...

Embodiment 2

[0030]Take 300g of copper-zinc mixed concentrate crushed and ground through a 50-mesh sieve, mix it with 2.4L of 110g / L sodium hydroxide solution and pour it into a pressurized reaction kettle. After the kettle body is installed, start stirring at a speed of 500r / min , filled with oxygen pressure to 0.85MPa, then heated to 135°C, the total pressure was 1.35MPa, reacted for 4.5h, unloaded the kettle, and filtered to obtain alkali leaching solution and alkali leaching residue. Add sulfuric acid to the alkaline immersion solution to adjust to pH = 3, filter to obtain lead sulfate precipitation and lead sinking solution, wash the lead sulfate precipitate with dilute sulfuric acid and dry to obtain lead sulfate product, heat the lead sinking solution to 70°C, and monitor while adding sodium sulfite Reaction solution potential, stop adding when the reaction solution potential is 550mV, filter to obtain coarse selenium powder and selenium-reduced solution, after selenium-reduction sol...

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

A process for all-wet recovery of valuable elements in a complex low-grade sulphide ore comprises the following steps: crushing and grinding a raw material, sieving the crushed and ground raw material, performing size mixing by use of a sodium hydroxide solution, and after that, performing pressurized oxidizing leaching to obtain an alkaline-leached solution and alkaline-leached residues; acidizing the alkaline-leached solution to obtain a lead sulfate product and a heavy lead solution, and performing potential reduction control step by step on the heavy lead solution to obtain crude selenium powder, crude tellurium powder and a post-reduction solution; performing copper-soaking on the alkaline-leached residues by use of a sulfuric acid solution to obtain copper-leached residues and a copper-leached solution; performing antimony and bismuth soaking on the copper-leached residues by use of an acid liquor containing chloride ions to obtain an antimony-leached solution and antimony-leached residues, feeding the antimony-leached slags to noble metals for recovery, and adjusting the pH of the antimony-leached solution step by step to obtain antimony residues and bismuth residues; adjusting the pH of the copper-leached solution to obtain iron residues and an iron-removed solution, wherein the iron residues serve as a waste water treatment additive, and the iron-removed solution is subjected to zinc dust replacement to obtain copper powder and a post-replacement solution; and merging the post-reduction solution and the post-replacement solution, and performing concentration and crystallization to obtain heptahydrate. The process is good in comprehensive recovery effect, strong in adaptation to the raw material, clean and environment-friendly in process, low in demand on equipment, adjustable in implementation scale and high in practicability.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy of nonferrous metals, and specifically relates to a process for fully wet recovery of valuable elements in complex low-grade sulfide ores. Background technique [0002] After more than two centuries of mining and utilization, high-quality non-ferrous metal mineral resources worldwide have been greatly reduced, but the demand for non-ferrous metal products in modern society is increasing. Therefore, how to use complex and low-grade inferior minerals has become a non-ferrous A topic that needs to be focused on and researched in the field of metal smelting. [0003] Most non-ferrous metal minerals belong to sulfide ores. For the treatment of complex low-grade sulfide ores, large enterprises usually adopt pyrotechnics. Blister copper is produced, and then refined copper is produced by electrolytic refining. The fire process has problems such as incomplete metal separation, serious environmental polluti...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B3/44C22B3/46C22B15/00C22B13/00C22B19/20C22B30/02C22B30/06
CPCC22B3/12C22B3/44C22B3/46C22B13/04C22B15/0065C22B15/0091C22B19/24C22B19/26C22B30/02C22B30/06Y02P10/20
Inventor 胡意文王日汪秋雨韩亚丽何强简志超李健唐华全荆旭冬
Owner JIANGXI COPPER CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products