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Method for producing battery-grade manganese sulfate through manganese tailings and titanium dioxide waste sulphuric acid

A technology of manganese tailings and waste sulfuric acid, applied in the direction of oxides of manganese sulfate, magnesium sulfate, ferrous iron, etc., can solve the problems of high impurity content without recycling value, poisoning of plant roots, destruction of land resources, etc., and achieve effective Conducive to environmental protection and comprehensive utilization of resources, lower production costs, and reduce consumption

Active Publication Date: 2019-02-19
宣城市安工大工业技术研究院有限公司
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  • Claims
  • Application Information

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Problems solved by technology

The main manifestations are as follows: ① Harmful elements in manganese tailings pollute the environment: Due to the long-term accumulation of waste residues, some harmful elements penetrate through the soil layer and enter the surface water and groundwater, forming a pollution source that is difficult to degrade and handle, which can make river organisms extinct and groundwater Resources are scrapped, endangering human health; ②Destroying regional ecology: Due to the lack of nutrients in the ore soil, and the high content of heavy metals such as manganese, it will cause poisoning to plant roots, prolong the natural recovery time of vegetation in abandoned land, and at the same time cause biological migration to be blocked. Diversity is reduced; ③ Destruction of land resources: A large amount of manganese tailings and manganese slag are accumulated in the fields and mountains and cannot be processed, which not only occupies agricultural land, but also induces geological disasters such as mudslides; ④ Causes other social problems: the accumulation of manganese tailings waste, increasing the Expenses such as land requisition and site disposal increase production costs, and occupy a large amount of agricultural land, intensifying conflicts between enterprises and residents
The first treatment method will produce a large amount of sulfuric acid slag. Due to the high content of impurities and no recycling value, these waste residues can only be discarded and stored, and occupy a large amount of land resources.
The second treatment method is complicated in process and high in recycling cost, so not all titanium dioxide manufacturers are qualified to apply it

Method used

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  • Method for producing battery-grade manganese sulfate through manganese tailings and titanium dioxide waste sulphuric acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a) A manganese tailings in Jingxi City, Guangxi, its main components mainly include the following components in terms of mass percentage: Mn10.26%, Fe 7.39%, SiO 2 61.05%, CaO 0.62%, Al 2 o 3 8.27% and MgO 0.56%, placed in a ball mill for wet milling with water added, the manganese tailings material after wet milling passes through a 200 mesh sieve, so that the total mass of the undersize is 95% of the total mass of the material;

[0027] b) After pre-mixing the manganese tailings material that has been ball-milled with ferrous sulfate and titanium white waste sulfuric acid, add it to a strong mixer for stirring and dissolving for 4 hours, the reaction temperature is 50 ° C, and use distilled water that is 3 times the volume of the solution to wash. liquid separation to obtain the first filtrate and the first filter residue; the first filter residue is diatomaceous earth after countercurrent washing with distilled water in the MVR evaporator, and the solid is dried, a...

Embodiment 2

[0031] a) A certain manganese tailings in Guigang City, Guangxi, whose main components mainly include the following components (by mass percentage): Mn2 1.53%, Fe 8.86%, SiO 2 33.47%, CaO 3.16%, Al 2 o 3 4.08%, MgO 1.00%. Place in a ball mill for wet milling with water added, and the manganese tailings material after wet milling is passed through a 200-mesh sieve, so that the total mass of the under-sieve is 99% of the total mass of the material;

[0032] b) After pre-mixing the manganese tailings material that has been ball-milled with ferrous sulfate and titanium white waste sulfuric acid, add it to a strong mixer for stirring and dissolving for 0.5h, the reaction temperature is 100°C, and wash with distilled water 10 times the volume of the solution, Solid-liquid separation to obtain the first filtrate and the first filter residue; the first filter residue is diatomite after countercurrent washing with distilled water in the MVR evaporator, and the solid is dried, and th...

Embodiment 3

[0036] a) A certain manganese tailings in Guizhou, Guangxi, whose main components mainly include the following components (by mass percentage): Mn9.07%, Fe2.38%, SiO 2 41.35%, CaO0.16%, Al 2 o 3 13.35% and MgO 0.31%. Place in a ball mill for wet grinding with water added, and the manganese tailings material after wet grinding is passed through a 200-mesh sieve, so that the total mass of the under-sieve is greater than 95% of the total mass of the material;

[0037] b) After pre-mixing the manganese tailings material that has been ball-milled with ferrous sulfate and titanium white waste sulfuric acid, add it to a strong mixer for stirring and dissolving for 2.5 hours, the reaction temperature is 80 ° C, and use distilled water that is 8 times the volume of the solution to wash. Solid-liquid separation to obtain the first filtrate and the first filter residue; the first filter residue is diatomite after countercurrent washing with distilled water in the MVR evaporator, and th...

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Abstract

The invention provides a method for producing battery-grade manganese sulfate through manganese tailings and titanium dioxide waste sulphuric acid. The method comprises the specific steps that titanium dioxide waste sulphuric acid is subjected to reduction and leaching, the manganese tailings are ground to be fine, after solid-liquid separation, white filter residues are used as diatomite, a leaching solution is extracted by a P204 extraction agent, then light roasting powder or magnesium oxide is used for saponification, after impurity removal, battery-grade manganese sulfate is obtained through evaporation and crystallization, and byproducts comprise iron black and magnesium sulfate. According to the method, the manganese tailings and titanium dioxide waste acid are treated in cooperation, the ecological safety problem caused by accumulation of the manganese tailings is solved, a brand new utilization route for titanium dioxide waste acid is also provided, and the comprehensive utilization additional value of the manganese tailings and titanium dioxide waste acid is increased. Prepared battery-grade manganese sulfate is high in quality, simple in process and low in production cost, all the manganese tailings and titanium dioxide waste sulphuric acid are recycled, secondary pollution is not caused, zero discharge of wastewater is achieved, and the method is beneficial to environmental protection and comprehensive utilization of resources.

Description

technical field [0001] The invention relates to the technical field of environmental protection technology, in particular to a method for producing battery-grade manganese sulfate by using manganese tailings and titanium white waste sulfuric acid. Background technique [0002] The rapid development of the manganese ore industry has led to the hoarding of manganese tailings resources. The ratio of manganese consumption to steel output in my country is about 3.2%-4%, slightly higher than the world average level, and manganese tailings increase with the consumption of finished ore. According to the current average grade of manganese ore of 22%, at least 47.0kg of finished ore is consumed per ton of steel production. We can predict that my country's demand for manganese ore in the next 10 years will be 36.17 million tons / a (equivalent to 7.95 million tons / a of metal manganese), and the production of manganese tailings will be 184.47 million tons / a. The rapid development of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10C01G49/08C01B33/12C01F5/40
CPCC01B33/12C01F5/40C01G45/10C01G49/08
Inventor 李灿华张响张影张会黄贞益王昭然于巧娣
Owner 宣城市安工大工业技术研究院有限公司
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