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Method for preparing high-purity manganese carbonate and co-producing gypsum by processing waste sulfuric acid with manganese spar

A technology of manganese carbonate and rhodochrosite, applied in chemical instruments and methods, calcium/strontium/barium sulfate, manganese compounds, etc., can solve the problem of high cost

Inactive Publication Date: 2011-06-15
南通华山实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has dealt with the waste sulfuric acid produced by the titanium dioxide industry to a certain extent, the cost is still relatively high
At present, there is still no better way to solve the problem of waste acid treatment and utilization of titanium dioxide, and there is no relevant report on the method of using rhodochrosite to process waste sulfuric acid to prepare high-purity manganese carbonate and produce gypsum

Method used

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  • Method for preparing high-purity manganese carbonate and co-producing gypsum by processing waste sulfuric acid with manganese spar
  • Method for preparing high-purity manganese carbonate and co-producing gypsum by processing waste sulfuric acid with manganese spar

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Embodiment 1

[0034] The method for preparing high-purity manganese carbonate and producing gypsum by treating waste sulfuric acid with rhodochrosite, the preparation steps are as follows:

[0035] Step A, 800kg rhodochrosite is pulverized into 60 mesh coarse powder.

[0036] Step B, putting the rhodochrosite coarse powder into the leaching tank 1 equipped with hydrochloric acid, and leaching for 6 hours with a pure mass ratio of 1:0.43; The concentration is 15%.

[0037] Step C, the solid-liquid mixture leached in step B is filtered with the first filter 2, and the filter cake impurities are calcined or buried deeply.

[0038] Step D, the filtrate obtained by filtering in step C and sulfuric acid are successively dropped into the anticorrosion reactor 3 with a pure mass ratio of 1: 0.58 for stirring reaction; before the filtrate is reacted with sulfuric acid, the filtrate can also be treated with an appropriate amount of manganese hydroxide Pretreatment; the sulfuric acid used is the was...

Embodiment 2

[0047] The method for preparing high-purity manganese carbonate and producing gypsum by treating waste sulfuric acid with rhodochrosite, the preparation steps are as follows:

[0048] Step A, 800kg rhodochrosite is pulverized into 80 mesh coarse powder.

[0049] Step B, putting the rhodochrosite coarse powder into the leaching tank 1 equipped with hydrochloric acid, and leaching for 8 hours with a pure mass ratio of 1:0.63; The concentration is 17%.

[0050] Step C, the solid-liquid mixture leached in step B is filtered with the first filter 2, and the filter cake impurities are calcined or buried deeply.

[0051]Step D, the filtrate obtained by filtering in step C and sulfuric acid are successively dropped into the anticorrosion reactor 3 with a pure mass ratio of 1: 0.78 for stirring reaction; before the filtrate is reacted with sulfuric acid, the filtrate can also be treated with an appropriate amount of manganese hydroxide Pretreatment; the sulfuric acid used is the wast...

Embodiment 3

[0060] The method for preparing high-purity manganese carbonate and producing gypsum by treating waste sulfuric acid with rhodochrosite, the preparation steps are as follows:

[0061] Step A, 800kg rhodochrosite is pulverized into 120 mesh coarse powder.

[0062] Step B, put the rhodochrosite coarse powder into the leaching tank 1 equipped with hydrochloric acid, and leach for 10 hours with a pure mass ratio of 1:0.83; wherein, the rhodochrosite coarse powder (calculated as containing 13% manganese), the volume of The concentration is 20%.

[0063] Step C, the solid-liquid mixture leached in step B is filtered with the first filter 2, and the filter cake impurities are calcined or buried deeply.

[0064] Step D, the filtrate obtained by filtering in step C and sulfuric acid are successively dropped into the anticorrosion reactor 3 with a pure mass ratio of 1: 0.98 for stirring reaction; before the filtrate is reacted with sulfuric acid, the filtrate can also be treated with a...

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Abstract

The invention belongs to the technical field of chemical three-waste treatment and utilization, and particularly relates to a method for preparing pure manganese carbonate and co-producing gypsum by processing waste sulfuric acid with manganese spar. The main technical scheme is as follows: processing waste sulfuric acid produced in the process of producing titanium white by fully utilizing the manganese spar, smashing the manganese spar and then lixiviating out manganese contained in the manganese spar with hydrochloric acid; reacting the lixiviation liquid with the waste sulfuric acid produced in the process of producing the titanium white; and finally, carrying out a carbonization reaction. By using the method, on one hand, the wastes are turned into valuable things, the environment is treated, and simultaneously, the waste sulfuric acid is converted into high-economic value manganese carbonate; and on the other hand, the gypsum is co-produced while the manganese carbonate is produced. By using the method in the invention, the production cost is low, the profits are large, the market demand amount is large, and the process and production equipment are simple, thus the method is a relatively practicable treatment and utilization method by which the considerable economic value is created, the chemical waste residue is eliminated, and the environment pollution is treated.

Description

technical field [0001] The invention belongs to the technical field of treatment and utilization of three chemical wastes, in particular to a method for preparing high-purity manganese carbonate and co-producing gypsum by treating waste sulfuric acid with rhodochrosite. technical background [0002] The source of industrial waste sulfuric acid is mainly produced by the sulfuric acid process titanium dioxide industry, which not only discharges a large amount of waste sulfuric acid but also has a high concentration. About 10 tons of waste sulfuric acid with a concentration of 5% to 22% (mass fraction) is discharged for every ton of titanium dioxide produced. The traditional method of these waste sulfuric acids is to produce concentrated sulfuric acid by taking a concentrated cycle process after recycling; however, this method has High energy consumption, demanding material requirements, difficult separation of ferrous sulfate and enrichment of impurities during recovery and ot...

Claims

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Application Information

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IPC IPC(8): C01G45/00C01F11/46
Inventor 王嘉兴
Owner 南通华山实业有限公司
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