Treatment method for waste manganese slag generated in hydroquinone production by means of aniline process
A technology of hydroquinone and treatment method, which is applied in the field of waste manganese sludge treatment, and can solve problems such as insufficient recovery of valuable elements in manganese sludge, environmental pollution, and difficulty in decomposing manganese sludge
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Embodiment 1
[0026] Select an appropriate amount of waste manganese mud raw material for processing:
[0027] A. Use a crusher to break the waste manganese mud into small pieces with a diameter of 0.1-1cm;
[0028] B. Add the crushed pieces to excess hydrochloric acid solution to react hydrochloric acid with manganese salt, magnesium salt and iron to generate manganese chloride, magnesium chloride and ferrous chloride; filter the reaction solution to obtain silicon dioxide as the main component The first filter cake of, and be mainly the first filtrate of ferrous chloride, magnesium chloride and manganese chloride;
[0029] C, add excessive sodium sulfide in the first filtrate, stir reaction, make it generate manganese sulfide precipitation, ferrous sulfide precipitation, obtain the second filter cake that contains manganese sulfide, ferrous sulfide after filtration, and contain chloride ion, magnesium A second filtrate of ions, sodium ions and sulfide ions;
[0030] D, in the second fil...
Embodiment 2
[0036]Choose the same raw material, wherein the A-E steps are the same, and the proportioning of the parts by weight of each substance in the alkaline solution in the step F is: 10wt% ammonia solution: methanol: water=1: 5: 15, and then add tetramethoxy Silane and tetraethoxysilane, wherein the mass ratio of tetramethoxysilane and tetraethoxysilane is 1:3, and the weight ratio of tetramethoxysilane and alkaline solution is: 1:5. In step G, the temperature of the autoclave is raised to 200° C. by a heater, and the pressure of the autoclave is raised to 30 MPa by a carbon dioxide pump. In step F, the undissolved impurities are mixed with the high-temperature boiler waste slag at a weight ratio of 1:2, wherein the temperature of the high-temperature boiler waste slag is 900-1000°C, the calcination temperature is controlled between 500-600°C, and the calcination time is 60-90 minutes .
Embodiment 3
[0038] Choose the same raw material, wherein the steps A-E are the same, and the proportioning of the parts by weight of the substances in the alkaline solution in the step F is: 10wt% ammonia solution: methanol: water=1: 9: 30, but then add tetramethoxy base silane and tetraethoxysilane, wherein the mass ratio of tetramethoxysilane and tetraethoxysilane is 1:2, and the weight ratio of tetramethoxysilane and alkaline solution is: 1.5:10. Wherein in step G, the temperature of the autoclave is raised to 190°C by a heater, and the pressure of the autoclave is raised to 22Mpa by a carbon dioxide pump. Wherein in step F, undissolved impurities and high-temperature boiler waste residue are mixed at a weight ratio of 1:1-2, wherein the temperature of high-temperature boiler waste residue is 800-1000°C, the calcination temperature is controlled between 450-500°C, and the calcination time is 60 ~80 minutes.
[0039] After testing, the manganese chloride, ferrous chloride and silica pu...
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