Method for preparing high-purity manganese nitrate and co-generating gypsum by using waste sulfuric acid treated by rhodochrosite
A technology of combining manganese nitrate and waste sulfuric acid, applied in the directions of manganese nitrate, calcium/strontium/barium sulfate, etc., can solve the problem of high cost
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Embodiment 1
[0034] Using rhodochrosite to process waste sulfuric acid to prepare high-purity manganese nitrate and produce gypsum, the preparation steps are as follows:
[0035] Step A, 800kg rhodochrosite is pulverized into 60 purpose 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, filtering the solid-liquid mixture leached in step B with the first filter 2, and calcining or deeply burying the filter cake impurities;
[0038] Step D, the filtrate obtained by filtering in step C and sulfuric acid are successively dropped into the first anticorrosion reactor 3 with a pure mass ratio of 1: 0.58 to carry out stirring reaction, and the pure mass ratio of the filtrate to calcium hydroxide is according to the pure manganese chloride in the filtrate and sulfuric acid for conversion; before the filtrate is reacted...
Embodiment 2
[0046] Using rhodochrosite to process waste sulfuric acid to prepare high-purity manganese nitrate and produce gypsum, the preparation steps are as follows:
[0047] Step A, 800kg rhodochrosite is pulverized into 100 mesh coarse powder;
[0048] 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%;
[0049] Step C, filtering the solid-liquid mixture leached in step B with the first filter 2, and calcining or deeply burying the filter cake impurities;
[0050]Step D, the filtrate obtained by filtering in step C and sulfuric acid are successively dropped into the first anticorrosion reactor 3 with a pure mass ratio of 1:0.78 to carry out stirring reaction, and the pure mass ratio of the filtrate to calcium hydroxide is according to the pure manganese chloride in the filtrate and sulfuric acid for conversion; before the filtrate is reacted wit...
Embodiment 3
[0058] Using rhodochrosite to process waste sulfuric acid to prepare high-purity manganese nitrate and produce gypsum, the preparation steps are as follows:
[0059] Step A, 800kg rhodochrosite is pulverized into 120 purpose coarse powder;
[0060] Step B, putting the rhodochrosite coarse powder into the leaching tank 1 equipped with hydrochloric acid, and leaching for 10 hours with a pure mass ratio of 1: 1.83; wherein, the rhodochrosite coarse powder (calculated as containing 13% manganese), the volume of The concentration is 20%;
[0061] Step C, filtering the solid-liquid mixture leached in step B with the first filter 2, and calcining or deeply burying the filter cake impurities;
[0062] Step D, the filtrate obtained by filtering in step C and sulfuric acid are successively dropped into the first anticorrosion reactor 3 with a pure mass ratio of 1:0.98 to carry out stirring reaction, and the pure mass ratio of the filtrate to calcium hydroxide is according to the pure m...
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