Ta metallurgical by-product composite salt recycling method
A compound salt and by-product technology, applied in the field of metallurgy, can solve the problems of non-recyclable ultra-fine tantalum powder and tantalum oxide, unfavorable low-cost recovery, and harsh distillation environment, so as to avoid environmental problems, realize reuse, and improve efficiency. Yield effect
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Embodiment 1
[0021] The by-product compound salt produced in the production of tantalum powder by sodium chloride as a diluent and sodium reduction potassium fluorotantalate is separated, the residual sodium is washed with deionized water, and the jaw crusher is used to crush it into small pieces with a particle diameter of about 50mm. Use drying equipment for resistance to F - , Cl - Corrosion vacuum oven, drying at a drying temperature of 150°C for 15 hours, after drying, the water content of the compound salt is 0.2%; the obtained compound salt contains diluent sodium chloride, sodium fluoride produced in the production process and potassium fluoride, residual ultrafine tantalum powder and tantalum oxide.
[0022] 60 kilograms of the compound salt of gained is used as diluent, 120 kilograms of potassium fluorotantalate, and 36 kilograms of sodium injections are produced according to the technical requirements of reduction production of tantalum powder. It can be seen from Table 2 that...
Embodiment 2
[0024] Separating the by-product compound salt produced in the production of tantalum powder by reducing potassium fluorotantalate with potassium chloride as a diluent, washing the residual sodium with deionized water, and crushing it into small pieces with a particle diameter of about 50mm by using a jaw crusher. Use drying equipment for resistance to F - , Cl - Corrosion vacuum oven, under the condition of drying temperature of 150 ℃, drying time is 15h, after drying, the water content of compound salt is 0.2%; the obtained compound salt contains diluent potassium chloride, produced in the production process Sodium and potassium fluoride, residual ultrafine tantalum powder and tantalum oxide.
[0025] 60 kilograms of compound salts of gained are used as diluent, 150 kilograms of potassium fluorotantalates, and 45 kilograms of sodium injections are reduced to produce tantalum powder. The tantalum powder produced as a diluent is fully compliant with the tantalum powder stand...
Embodiment 3
[0027] Using sodium chloride and potassium chloride as the diluent, the by-product compound salt produced in the production of tantalum powder by sodium reduction of potassium fluorotantalate is separated, the residual sodium is washed with deionized water, and the particle diameter is about 50mm by jaw crusher. For small pieces, use drying equipment for resistance to F - , Cl - Corrosion vacuum oven, drying at a drying temperature of 150°C for 15 hours, after drying, the water content of the compound salt is 0.3%; the obtained compound salt contains diluents sodium chloride and potassium chloride, produced during the production Sodium fluoride and potassium fluoride, residual ultrafine tantalum powder and tantalum oxide.
[0028] 60 kilograms of the compound salt of gained is used as diluent, 200 kilograms of potassium fluorotantalate, inject 60 kilograms of sodium and reduce the technological requirement of producing tantalum powder to produce, and the result of gained tant...
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