Wet production processs and apparatus of granular ferrous sulfate monohydrate
A ferrous sulfate and water ferric sulfite technology, applied in the direction of ferric sulfate, can solve the problems of packaging, storage and transportation, inconvenient use, easy oxidation in the production process, small crystals, etc., and achieve easy equipment design or selection, packaging And the effect of convenient storage and transportation, moderate particle size
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Embodiment 1
[0038] Pour ferrous sulfite heptahydrate, a by-product of the titanium dioxide factory, into the washing filter tank 1 and wash away surface impurities with clear water. After stirring, let it stand for 10-20 minutes, remove the floating matter on the top, drain the impurities settled at the bottom, then filter and drain the water to obtain pure ferric sulfite heptahydrate. Part of the ferric sulfite heptahydrate can be recovered by concentrating the filtered water. Put the above-mentioned cleaned ferric sulfite heptahydrate into the dissolution reactor and heat it to 70-100°C to melt, then cool it down to below 65°C, send the recrystallized material to the centrifuge for centrifugation, and then boiler hot gas dryer Indirect heating; obtaining ferric sulfite monohydrate powder (weight content) with an iron content of 30-32%, ferric sulfite monohydrate without free water, and returning the mother liquor separated by the centrifuge to the dissolution reactor for reuse. Then us...
Embodiment 2
[0040] Pour ferrous sulfite heptahydrate, a by-product of the titanium dioxide factory, into the washing filter tank 1 and wash away surface impurities with clear water. After stirring, let it stand for 10-20 minutes, remove the floating matter on the top, drain the impurities settled at the bottom, then filter and drain the water to obtain pure ferric sulfite heptahydrate. Part of the ferric sulfite heptahydrate can be recovered by concentrating the filtered water. Put the above-mentioned cleaned ferric sulfite heptahydrate into the dissolution reactor and heat it to 70-100°C to melt, then cool it down to below 65°C, send the recrystallized material to a centrifuge for centrifugation, and then dry it in an airflow dryer Obtain iron content is 30-32% ferric sulfite monohydrate powder (weight content), does not contain free water ferric sulfite monohydrate, and the mother liquor separated by the centrifuge returns to the dissolution reactor for reuse. Then use a tablet machine...
Embodiment 3
[0042] Pour ferrous sulfite heptahydrate, a by-product of the titanium dioxide factory, into the washing filter tank 1 and wash away surface impurities with clear water. After stirring, let it stand for 10-20 minutes, remove the floating matter on the top, drain the impurities settled at the bottom, then filter and drain the water to obtain pure ferric sulfite heptahydrate. Part of the ferric sulfite heptahydrate can be recovered by concentrating the filtered water. Put the above-mentioned cleaned ferric sulfite heptahydrate into the dissolution reactor and heat it to 70-100°C to melt, then cool it to below 65°C, send the recrystallized material to a centrifuge for centrifugation, and then heat it with microwave for 3-10 Dry in 10 minutes; Obtain iron content and be the ferric sulfite monohydrate powder (weight content) of 30-32%, do not contain the ferric sulfite monohydrate of free water, the mother liquor separated by the centrifuge returns to the dissolution reactor for re...
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