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Method for producing feed-grade manganese sulfate monohydrate

A technology of water sulfuric acid and feed grade, applied in the direction of manganese sulfate, solution crystallization, etc., can solve the problems of high impurity content of manganese sulfate, easy moisture absorption and agglomeration, poor fluidity, etc.

Active Publication Date: 2013-08-28
四川中创启源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high content of magnesium sulfate in the product is due to the high magnesium content in manganese ore on the one hand, and the closed loop of the mother liquor in the evaporation and crystallization stage returning to the process on the other hand. The manganese sulfate produced by this method has high impurity content, poor fluidity, and is easy to absorb moisture. Caking

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  • Method for producing feed-grade manganese sulfate monohydrate
  • Method for producing feed-grade manganese sulfate monohydrate

Examples

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Effect test

Embodiment 1

[0035] Embodiment 1 adopts the inventive method to produce feed grade manganese sulfate monohydrate

[0036] a. Manganese sulfate prepared by two mines and one acid method: 1000kg of manganese dioxide ore (manganese content is 16%, magnesium content is 0.35%), pyrite (sulfur content is 39%, iron content is 35%) 10kg, with 98 % sulfuric acid solution leaching, obtain manganese sulfate solution;

[0037] b. Evaporation and crystallization of manganese sulfate solution. The temperature of evaporation and crystallization is 100°C. Evaporate until the solution has a solid content of 50%, and then separate the solid and liquid; the solid obtained from separation is dried with air flow to obtain the product of manganese sulfate monohydrate; the filtrate obtained from separation is mother liquor 1 ;

[0038] c. Add manganese dioxide ore slurry to mother liquor 1 to remove, filter, remove iron impurities, and then evaporate and crystallize. The temperature of evaporation and crystalli...

Embodiment 2

[0046] Embodiment 2 adopts the inventive method to produce feed grade manganese sulfate monohydrate

[0047] a. Manganese sulfate prepared by two mines and one acid method: 1000kg of manganese dioxide ore (manganese content is 16%, magnesium content is 0.35%), pyrite (sulfur content is 39%, iron content is 35%) 10kg, with 98 % sulfuric acid solution leaching, obtain manganese sulfate solution;

[0048] b. Evaporation and crystallization of manganese sulfate solution. The temperature of evaporative crystallization is 80°C. Evaporate until the solution has a solid content of 55%, and then separate the solid and liquid; dry the solid obtained by airflow to obtain the product of manganese sulfate monohydrate; the filtrate obtained by separation is the mother liquor 1 ;

[0049] c. Add manganese dioxide ore slurry to mother liquor 1 to remove, filter, remove iron impurities, and then evaporate and crystallize. The temperature of evaporation and crystallization is 90°C. Evaporate u...

Embodiment 3

[0057] Embodiment 3 adopts the inventive method to produce feed grade manganese sulfate monohydrate

[0058] a. Manganese sulfate prepared by two mines and one acid method: 1000kg of manganese dioxide ore (manganese content is 16%, magnesium content is 0.35%), pyrite (sulfur content is 39%, iron content is 35%) 10kg, with 98 % sulfuric acid solution leaching, obtain manganese sulfate solution;

[0059] b. Evaporation and crystallization of manganese sulfate solution. The temperature of evaporative crystallization is 110°C. Evaporate until the solution has a solid content of 45%, and then separate the solid from the liquid; dry the separated solid with airflow to obtain the product of manganese sulfate monohydrate; the filtrate obtained from the separation is the mother liquor 1 ;

[0060] c. Add manganese dioxide ore slurry to mother liquor 1 to remove, filter, remove iron impurities, and then evaporate and crystallize. The temperature of evaporation and crystallization is 10...

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Abstract

The invention relates to a method for producing feed-grade manganese sulfate monohydrate and belongs to the technical field of feed production. The method for producing the feed-grade manganese sulfate monohydrate, provided by the invention, has the advantage that the impurity content of the feed-grade manganese sulfate monohydrate produced by the method is low. The method provided by the invention comprises the step of producing a manganese sulfate solution by adopting a dual mineralizing-acidifying method and further comprises the following steps of: (a) carrying out evaporation and crystallization on the manganese sulfate solution, carrying out solid-liquid separation, wherein solids obtained through separation are dried so as to obtain a manganese sulfate monohydrate product and filtrate obtained through separation serves as mother liquid 1; (b) removing impurities from the mother liquid 1, then, carrying out evaporation and crystallization on the mother liquid 1, and carrying out solid-liquid separation, wherein solids obtained through separation is returned to the manganese sulfate solution prepared through acid dipping in the dual mineralizing-acidifying method step so as to be dissolved, then, is processed according to the step (a), and filtrate obtained through separation serves as mother liquid 2; and (c) carrying out evaporation and crystallization on the mother liquid 2, carrying out solid-liquid separation, wherein solids obtained through separation returns to the step (a) so as to be mixed with the mother liquid 1 and be dissolved in the mother liquid 1, then, processed according to the step (b), and filtrate obtained through separation serves as mother liquid 3 which is subjected to waste liquid treatment.

Description

technical field [0001] The invention relates to a method for producing feed grade manganese sulfate monohydrate, belonging to the technical field of feed production. Background technique [0002] Manganese sulfate monohydrate is one of the important trace element fertilizers, used as base fertilizer, seed soaking, seed dressing, topdressing and foliar spraying. It is used as a feed additive in animal husbandry and feed industry, and also as a raw material for preparing drier in the paint industry. It is used as a catalyst in the synthesis of fatty acids, and can also be used in papermaking, ceramics, printing and dyeing, ore flotation, electrolytic manganese and other manganese salts. raw material. [0003] Due to the different uses of manganese sulfate monohydrate, the requirements for its purity are also different, and the requirements for the purity of feed-grade manganese sulfate monohydrate are relatively high. At present, the methods for producing feed-grade manganes...

Claims

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Application Information

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IPC IPC(8): C01G45/10B01D9/02
Inventor 王毅姜二林
Owner 四川中创启源新材料科技有限公司
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