Method for co-production of feed manganese sulfate by using wastewater of crude indium production
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 joint production and manganese sulfate technology, applied in the direction of manganese sulfate, etc., can solve the problems of unproductive, difficult to handle, and large damage to waste acid water, and achieve the effects of saving production costs, improving storage, and reducing the amount of slag
Active Publication Date: 2014-03-05
JIANGXI RUIDA NEW ENERGY TECH CO LTD
View PDF8 Cites 7 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
[0002] In our country's existing wet production crude indium technology, it is necessary to discharge waste acid water containing a certain amount of heavy metals such as arsenic and cadmium, which seriously pollutes the ecological environment and cannot be produced normally; because the wet leaching process of wet production of crude indium is used Excessive sulfuric acid, the degree of leaching is relatively enhanced, and at the same time, the leached impurities are relatively more, and the heavy metals such as arsenic and cadmium in the indium-containing materials are relatively more
Although manufacturers of lead, tin, and bismuth-containing filter residues can be dragged away and sold as raw materials for production, waste acid water containing arsenic, cadmium, and other harmful heavy metals is difficult to treat well.
However, when supporting water treatment, the arsenic and cadmium in the discharged wastewater are difficult to meet the standards, and the cost of water treatment is expensive, which is generally unaffordable for small crude indium plants. Therefore, the state does not support the production of small crude indium plants, and direct waste water treatment The crude indium plants in the row were resolutely and severely cracked down, so that the general small crude indium plants were closed due to the great damage to the environment caused by waste acid water and could not produce
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
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0023] Embodiment 1: the method utilizing the waste water of producing thick indium to co-produce manganese sulfate comprises the steps:
[0024] 1. Take 1000ml of production wastewater in the indium manufacturing workshop. This solution contains 72g / l of sulfuric acid, 0.020g / l of indium, 0.9g / l of arsenic, 1.1g / l of cadmium, and 0.6g / l of tin, and put it into a 2000ml beaker to start stir;
[0025] 2. Add 500g of manganese ash while stirring. The manganese ash contains 20.6% manganese dioxide, which is the raw material for the normal production of manganese sulfate. After adding, continue to stir for 10 minutes;
[0026] 3. Add 110g of reducing agent pyrite powder, stir while adding, and continue stirring for 20 minutes after adding to make the solution into a slurry;
[0027] 4. Slowly add 55ml of concentrated sulfuric acid while stirring, continue to stir and react for 4 hours, heat appropriately during the reaction process to compensate for the heat loss of stirring, mea...
Embodiment 2
[0032] Embodiment 2, utilize the waste water after the wet method of lead soot to produce coarse indium to co-produce feed manganese sulfate Method steps include as follows:
[0033] 1. Weigh 200g of lead soot (the lead soot contains 0.21% indium, 26.4% lead, 5.2% arsenic, 2.9% cadmium, and 4.2% tin) into a 2000ml beaker, add 100ml water, and use a glass rod stir to make a slurry;
[0034] 2. Turn on the stirring and slowly add 100ml of concentrated sulfuric acid to react, add heat appropriately and stir while reacting for 1 to 2 hours, then add 100ml of water to react for half an hour, finally add 1200ml of water to stir for half an hour and then filter;
[0035] 3. After washing and drying the filter residue, weigh and dry it to obtain 146g of filter residue. After testing, the filter residue contains 0.022% indium, 36.4% lead, 4.9% arsenic, 1.6% cadmium, and 3.7% tin. It is normal production of lead slime and can become a lead manufacturer. raw materials for the production...
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 discloses a method for co-production of feed manganese sulfate by using wastewater of crude indium production. According to the method, on the basis of production of feed manganese sulfate through a wet method, the influence of excessive sulfuric acid and heavy metals including arsenic, cadmium and the like in the wastewater of the crude indium production through a wet method on the environment is thoroughly eliminated while the feed manganese sulfate is produced, so that the production of crude indium and the feed manganese sulfate through the wet method achieves comprehensive and full utilization of wastes, and the pollution caused by waste acid water containing heavy metals to the environment is thoroughly eliminated. The method comprises the steps of 1, performing leaching reaction on manganese ash in a leaching tank by using indium preparation wastewater; 2, performing pressure filtration; 3, adjusting the pH value of the filtrate to 4-4.5, and then pressing liquid; 4, adding barium sulfide to improve the pH value of a stock solution to 5-5.4, and then filtering; 5, cooling and standing the stock solution, adding an SDD (sodium dimethyl dithiocarbamate) solution and a flocculating agent, then performing pressure filtration, concentrating the filtrate, performing evaporative crystallization, and drying to obtain a feed manganese sulfate product. By adopting the method, the indium preparation wastewater and waste residues causing environmental pollution can be fully and comprehensively used, and a raw material for producing manganese sulfate is provided, so that the method is favorable for reducing the production cost and protecting the ecological environment.
Description
technical field [0001] The invention relates to a method for jointly producing feed manganese sulfate by using waste water from producing crude indium, and belongs to the technical field of chemical environmental protection. Background technique [0002] In our country's existing wet production crude indium technology, it is necessary to discharge waste acid water containing a certain amount of heavy metals such as arsenic and cadmium, which seriously pollutes the ecological environment and cannot be produced normally; because the wet leaching process of wet production of crude indium is used Excessive sulfuric acid, the degree of leaching is relatively enhanced, and at the same time, the leached impurities are relatively more, and the heavy metals such as arsenic and cadmium in the indium-containing materials are relatively more extracted. Although manufacturers of lead, tin, and bismuth-containing filter residues can be dragged away and sold as raw materials for production...
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