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Comprehensive utilization method of electrolytic manganese residue washing liquid

A technology of electrolytic manganese slag and water washing, which is applied in the direction of manganese compounds, chemical instruments and methods, ammonium carbonate/acid carbonate, etc., can solve the problems not mentioned in the comprehensive utilization of solid-liquid mixture, etc., and achieve easy industrial The effect of large-scale production, less pollution and simple process

Active Publication Date: 2018-09-04
MIANYANG TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent mainly describes the preparation method of manganese acetate. As far as the process is concerned, it does not involve cycle production, and does not mention the comprehensive utilization of the solid-liquid mixture after ammonia distillation

Method used

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  • Comprehensive utilization method of electrolytic manganese residue washing liquid
  • Comprehensive utilization method of electrolytic manganese residue washing liquid
  • Comprehensive utilization method of electrolytic manganese residue washing liquid

Examples

Experimental program
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Embodiment 1

[0026] Such as figure 1 As shown, weigh 10kg of electrolytic manganese slag (sourced from Sichuan Pingwu Manganese Industry), add 15 liters of tap water, place in a stirred reactor and wash with water for 1 hour, then filter with a filter cloth, put the filtrate in a bucket, and add thiram 10 grams of sodium, 20 grams of wood activated carbon, stirred for 30 minutes, then stirred for 5 minutes after 2 hours, stood still for 12 hours, filtered with filter cloth, added 400g of ammonium bicarbonate, stirred and reacted for 2 hours, the reaction temperature was 20°C, after the reaction was completed, 500L of carbon dioxide was introduced to dissolve and remove calcium and magnesium on the surface of manganese carbonate. After standing for 10 hours, vacuum filtration and washing were carried out, and the solid was dried at 60°C to obtain crude manganese carbonate. Transfer the filtrate to self-made deammonization equipment, add 2Kg of quicklime, start the agitator and water pump, d...

Embodiment 2

[0028] Weigh 10kg of electrolytic manganese slag (from Sichuan Pingwu Manganese Industry), add 15 liters of tap water, place in a stirring reaction kettle, stir and wash with water for 1 hour, then filter with filter cloth, put the filtrate in a bucket, add barium sulfide 20 grams, 10 grams of wood activated carbon, stirred for 30 minutes, stirred for 5 minutes after 2 hours, stood still for 12 hours, filtered with a filter cloth, added 300g of ammonium bicarbonate, stirred for 2 hours, and the reaction temperature was 30°C. After the reaction was completed, 100L Carbon dioxide was left to stand for 10 hours, vacuum filtered, washed 3 times, and the solid was dried at 60°C to obtain crude manganese carbonate. Transfer the filtrate to self-made deamination equipment, add 1.5Kg quicklime, start the agitator and water pump, deamination under negative pressure, collect ammonia in a two-stage pressurized cycle with water, pass carbon dioxide into the first-stage collection device, a...

Embodiment 3

[0030] Weigh 10kg of electrolytic manganese slag (from Sichuan Pingwu Manganese Industry), add 15 liters of tap water, place in a stirring reaction kettle, stir and wash with water for 1 hour, then filter with a filter cloth, put the filtrate in a bucket, add 10 liters of sodium formex gram, 20 grams of wooden activated carbon, stirred for 30 minutes, stirred for 5 minutes after 2 hours, stood still for 12 hours, filtered with filter cloth, added 200g of ammonium bicarbonate, stirred for 2 hours, and the reaction temperature was 20°C. After the reaction was completed, 100L Carbon dioxide was left to stand for 10 hours, vacuum filtered, washed, and the solid was dried at 60°C to obtain crude manganese carbonate. Filtrate is transferred in self-made deamination equipment, adds 2Kg unslaked lime, starts agitator and water pump, negative pressure deamination, adopts the mode of embodiment 1 and embodiment 2 to collect ammonia liquid, pressurizes two-stage circulation to collect amm...

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Abstract

The invention relates to a comprehensive utilization method of electrolytic manganese residue washing liquid. The comprehensive utilization method comprises the following steps: (1) purifying, namelyadding a heavy metal precipitator and activated carbon into electrolytic manganese residue washing liquid, stirring for reaction, and filtering; (2) carrying out manganese precipitation, namely addingammonium hydrogen carbonate to precipitate manganese into manganese carbonate, and carrying out pressure filtering washing and drying, so as to obtain crude manganese carbonate; (3) carrying out deamination, namely adding lime into the manganese precipitation residual liquid to generate precipitation and deamination reaction, carrying out solid-liquid separation, adjusting the pH value of solids,carrying out pressure filtering drying to obtain putty powder, pumping filtrate into a deamination tower, carrying out deamination, adjusting the pH value of solution with carbon dioxide, and reusingthe solution for washing residue; and (4) carrying out carbonization, namely reacting by virtue of ammonia gas exhausted from the deamination tower and carbon dioxide, so as to generate ammonium hydrogen carbonate. By virtue of a circulating production process, a manganese carbonate product is obtained, meanwhile, two products including ammonium hydrogen carbonate and a gypsum-base internal wallputty raw material can be further produced, and soluble substances in the manganese residue are adequately recycled and comprehensively utilized, so that the treatment cost is greatly lowered, and thecomprehensive utilization method has good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of treatment and recycling of electrolytic manganese slag, and in particular relates to a comprehensive utilization method of electrolytic manganese slag washing liquid. Background technique [0002] A large amount of industrial solid waste is produced in the production process of electrolytic manganese. The production of 1 ton of electrolytic manganese produces 4.5-10 tons of electrolytic manganese waste residue. The amount of electrolytic manganese slag produced in my country reaches 10 million tons every year. Manganese slag contains a large amount of heavy metal ions and ammonia nitrogen. The use of slag dumps will consume a large area of ​​land, and the soluble ammonia nitrogen and heavy metal ions in the slag dumps will seep into groundwater, rivers, and soil with the erosion of rainwater, causing serious damage to the ecological environment and directly endangering surrounding people, animals and plants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00C01C1/26C09D5/34
CPCC01C1/26C01G45/00C09D5/34
Inventor 黎国兰李松羊建周小利朱越李昭伦
Owner MIANYANG TEACHERS COLLEGE
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