Method for leaching zinc and recovering valuable metals through carrying out pressurized oxidation on zinc sulfide concentrates
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of zinc sulfide concentrate and pressurized oxygen leaching, applied in the direction of improving process efficiency, etc., can solve the problems of time and cost, low zinc recovery rate, unrealistic and other problems
Active Publication Date: 2014-06-18
CINF ENG CO LTD
View PDF8 Cites 18 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] One way is to mix zinc sulfide concentrates of different components and then adopt zinc pressure oxygen leaching treatment. The technical parameters, process control conditions and supporting facilities remain unchanged. Zinc sulfide concentrate, the result is to obtain high zinc recovery rate, then the comprehensive recovery rate of valuable metals is low, and to obtain high comprehensive recovery rate of valuable metals, the zinc recovery rate is low
[0006] Another way is to treat zinc sulfide concentrates with different components according to the same composition, and use zinc pressure oxygen leaching separately for a certain period of time, and adopt different technical parameters and process control conditions for zinc sulfide concentrates with different components. The supporting facilities should be rectified accordingly. Although this method can obtain a higher zinc recovery rate and comprehensive recovery rate of valuable metals, due to changes in technical parameters, there will be a running-in period in the production process that will affect the technical indicators, and the supporting facilities need to be rectified accordingly. For a certain amount of time and cost, zinc pressure oxygen leaching is used for zinc sulfide concentrates with different components in production. It is unrealistic to change the technical conditions and corresponding supporting facilities frequently.
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0030] The recovery of zinc, heavy metal lead, silver, scattered metal gallium, germanium, indium, etc. in zinc sulfide concentrates with different components is carried out through the following three steps:
[0031] 1) Zinc sulfide concentrate rich in lead, silver and scattered metals produced by a certain factory (element content: Zn 50.43%, Pb 1.66%, Ag 274g / t, Ga 204g / t, Ge 112g / t, In 139g / t t) After grinding, the particle size is about 25-40μm, and the solid concentration is about 65%. Pump into the reactor, feed oxygen with a concentration above 98%, and at the same time feed the waste electrolyte after purification and electrowinning to produce zinc. It is leached with high temperature, high pressure and high acid, with a temperature of 145°C, a pressure of 1100kPa, and an acidity of 60g / L. In this way, the sulfur in the zinc sulfide is oxidized to elemental sulfur, and the zinc becomes soluble zinc sulfate. After the leached pulp is cooled and pressure-reduced in the...
Embodiment 2
[0035] 1) Zinc sulfide concentrate rich in lead, silver and scattered metals produced by a certain factory (element content: Zn 50.43%, Pb 1.66%, Ag 274g / t, Ga 204g / t, Ge 112g / t, In 139g / t t) After grinding, the particle size is about 25-40μm, and the solid concentration is about 70%. Pump it into the reactor, feed oxygen with a concentration above 98%, and at the same time feed the waste electrolyte after purification and electrowinning to produce zinc, using high temperature, high pressure and high acid leaching, with a temperature of 155°C, a pressure of 1300kPa, and an acidity of 80g / L. After the leached pulp is cooled and pressure-reduced in the flash tank, it is sent to the thickener for separation to obtain the leaching solution and leaching residue (underflow). The leaching rate of zinc is 98.10%, and the leaching rate of scattered metals is 93.10% for Ga, 91.40%, and 92.20% for In. The slag is sent to flotation, the tailings are lead and silver slag, and the lead send...
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
Login to view more
Abstract
The invention relates to a method for leaching zinc and recovering valuable metals through carrying out pressurized oxidation on zinc sulfide concentrates. The method can be used for simultaneously treating zinc sulfide concentrates rich in lead, silver and dissipated metals and zinc sulfide concentrates free of lead, silver and dissipated metals. The method comprises the steps of firstly, carrying out peracid leaching on most of zinc and dissipated metals in zinc sulfide concentrates rich in zinc and valuable metals into a solution at high temperature and high pressure to obtain heavy metal contained residues, namely, lead and silver residues; then, carrying out weak acid leaching on zinc in the zinc sulfide concentrates only containing zinc at high temperature and high pressure, and meanwhile, separating iron and gangue components from main metal zinc; finally, settling gallium, germanium, indium and the like in the dissipated metals in the leached solution by using a neutralizing agent, and enriching gallium, germanium, indium and the like into neutralized residues. The method can be used for simultaneously treating zinc sulfide concentrates with different components under the condition that technical parameters and supporting facilities are not changed; in addition, the recovery rate of zinc is high, and meanwhile, the recovery rate of valuable metals is also high.
Description
[0001] technical field [0002] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for zinc sulfide concentrate leaching zinc with pressurized oxygen while recovering valuable metals. Background technique [0003] Zinc pressure oxygen leaching is suitable for processing various raw materials with different components, such as: low-grade high-iron zinc sulfide concentrate, lead-zinc mixed concentrate, zinc ferrite slag produced by zinc factories, and high-lead, high-copper and high-grade zinc slags that are not suitable for roasting. A fine-grained zinc concentrate of silicon. These raw materials can be roughly divided into two types. One type of raw material is mainly composed of zinc and does not contain recyclable valuable metals. The other type of raw material contains not only zinc but also recyclable valuable metals, such as lead and silver. , copper and scattered metal gallium, germanium, indium, etc. [0004] Zinc ...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more