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Method for preparing high-purity manganese sulfate from poor rhodochrosite

A technology of rhodochrosite and manganese sulfate, applied in the direction of manganese sulfate and the like, can solve the problems of low purity of manganese sulfate, difficult separation, and few utilization technologies, and achieves the effects of high utilization efficiency, low production cost and simple separation.

Inactive Publication Date: 2019-02-12
GUIZHOU DALONG HUICHENG NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are few utilization technologies for lean rhodochrosite, and the utilization efficiency of lean rhodochrosite is low. For impurities such as calcium and magnesium in manganese sulfate, it is difficult to separate them, and the obtained manganese sulfate has low purity and high production cost of manganese sulfate. question

Method used

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  • Method for preparing high-purity manganese sulfate from poor rhodochrosite

Examples

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Comparison scheme
Effect test

Embodiment 1

[0051] Example 1. A method for preparing high-purity manganese sulfate from poor rhodochrosite comprises the steps:

[0052] (a) Crushing the manganese-poor mineral material into 400 meshes to obtain product A;

[0053] (b) Send product A into a magnetic separator for magnetic separation to obtain product B;

[0054] (c) putting B product into concentration is to soak in the sulfuric acid solution of 40%, and manganese sulfate concentration is 300g / L in the soaking liquid, gets C product;

[0055] (d) Press filter C product, get the filtrate, get D product;

[0056] (e) According to product D, Fe 2 (SO 4 ) 3 and KMnO 4 The dosage ratio is, add 7g of Fe to 1L of D product 2 (SO 4 ) 3 and 1.5g KMnO 4 ; Add Fe to product D 2 (SO 4 ) 3 and KMnO 4 , while using Mn(OH) 2 powder or 40% H 2 SO 4 To adjust the pH of the solution to 2-4, stir at 80°C for 1h, then let stand for 2h and then filter;

[0057] (f) Take product E, using Mn(OH) 2 powder or 40% H 2 SO 4 To ...

Embodiment 2

[0061] Example 2. A method for preparing high-purity manganese sulfate from poor rhodochrosite comprises the steps:

[0062] (a) Crushing the manganese-poor mineral material into 500 meshes to obtain product A;

[0063] (b) Send product A into a magnetic separator for magnetic separation to obtain product B;

[0064] (c) B product is put into concentration and is soaked in the sulfuric acid solution of 50%, and manganese sulfate concentration is 400g / L in the soaking liquid, gets C product;

[0065] (d) Press filter C product, get the filtrate, get D product;

[0066] (e) According to product D, Fe 2 (SO 4 ) 3 and KMnO 4 The dosage ratio is, add 20g of Fe to 1L of D product 2 (SO 4 ) 3 and 3gKMnO 4 ; Add Fe to product D 2 (SO 4 ) 3 and KMnO 4 , while using Mn(OH) 2 powder or 50% H 2 SO 4 To adjust the pH of the solution to 2-4, stir at 85°C for 1.5h, and then filter after standing for 2.5h;

[0067] (f) Take product E, using Mn(OH) 2 powder or 50% H 2 SO 4...

Embodiment 3

[0071] Example 3. A method for preparing high-purity manganese sulfate from poor rhodochrosite comprises the steps:

[0072] (a) Crushing the manganese-poor mineral material into 500 meshes to obtain product A;

[0073] (b) Send product A into a magnetic separator for magnetic separation to obtain product B;

[0074] (c) B product is put into concentration and is soaked in the sulfuric acid solution of 50%, and manganese sulfate concentration is 500g / L in the soaking liquid, gets C product;

[0075] (d) Press filter C product, get the filtrate, get D product;

[0076] (e) According to product D, Fe 2 (SO 4 ) 3 and KMnO 4 The dosage ratio is, add 30g of Fe to 1L of D product 2 (SO 4 ) 3 and 4gKMnO 4 ; Add Fe to product D 2 (SO 4 ) 3 and KMnO 4 , while using Mn(OH) 2 powder or 50% H 2 SO 4 To adjust the pH of the solution to 2-4, stir at 85°C for 2h, then let stand for 3h and then filter;

[0077] (f) Take product E, using Mn(OH) 2 powder or 50% H 2 SO4 To ad...

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Abstract

The invention discloses a method for preparing high-purity manganese sulfate from poor rhodochrosite. The method comprises the following steps: crushing a poor rhodochrosite material to obtain a product A; carrying out magnetic separation on the product A to obtain a product B; carrying out acid leaching on the product B to obtain a product C; carrying out pressure filtration on the product C, andtaking filtrate to obtain a product D; adding Fe2(SO4)3 and KMnO4 into the product D, stirring, standing and then filtering, and taking filtrate to obtain a product E; taking the product E, regulating PH, adding an active carbon adsorbent, stirring, standing and then filtering, and taking filtrate to obtain a product F; adding MnF2 into the product F, assisting with ultrasonic treatment, stirring, standing and then filtering, and taking filtrate to obtain a product G; adding MnS into the product G, assisting with ultrasonic treatment, stirring, standing and then filtering, and taking filtrateto obtain a product H; concentrating and crystallizing the product H to obtain high-purity battery-grade manganese sulfate. The high-purity manganese sulfate is prepared from the poor rhodochrosite;the utilization efficiency of the poor rhodochrosite is high; impurities such as calcium and magnesium in manganese sulfate are simply separated; the prepared manganese sulfate is high in purity and low in production cost.

Description

technical field [0001] The invention relates to a method for preparing manganese sulfate from lean rhodochrosite, in particular to a method for preparing high-purity battery-grade manganese sulfate from lean rhodochrosite. Background technique [0002] Although my country's manganese ore resources are very rich, their grades are low. For example, among the ultra-large manganese deposits discovered in Songtao County, Guizhou Province in recent years, the grade of Mn in about half of the reserves is lower than 20%, so finding effective ways to efficiently utilize these low-grade minerals (poor rhodochrosite) resources is the key to be solved urgently question. In addition, with the rapid development of the lithium-ion secondary battery industry in recent years, the rise of a series of high-quality electronic chemicals such as lithium-nickel-cobalt-manganese-oxygen ternary cathode materials and lithium manganate cathode materials, manganese sulfate as the main raw material, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
CPCC01G45/10C01P2006/80
Inventor 董雄文刘其斌姚金华苏明胤危先钰
Owner GUIZHOU DALONG HUICHENG NEW MATERIAL CO LTD
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