Method for recovering rare earth carbonate from waste hydrogen storage alloy powder
A rare earth carbonate and alloy powder technology, applied in the field of metallurgy, can solve the problems of high production cost, cumbersome operation, poor post operating environment, etc., and achieve the effects of low production efficiency, stable chemical structure and improved recovery rate
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Embodiment 1
[0023] Embodiment 1: reclaim rare earth carbonate from waste hydrogen storage alloy powder
[0024] Process see figure 1 . Including the following steps:
[0025] Raw materials: Waste materials from the production process of a company’s hydrogen storage alloy powder, the main components of which are shown in Table 1:
[0026] The main component table (%) of raw material used in table 1 embodiment 1
[0027]
[0028] Sulfuric acid leaching of waste hydrogen storage alloy powder: by controlling the temperature of the leaching reaction at 90-95°C, adding sulfuric acid as an oxidant, and under the action of stirring, acidolyze the waste hydrogen storage alloy powder for 2-3 hours, and control the acidity at the end point to 20-60g / l, the metal components in the leachate are listed in Table 2:
[0029] The leaching (g / l) table of waste hydrogen storage alloy powder of table 2
[0030]
[0031] Calculation of Co / Ni recovery rate:
[0032] (Concentration of cobalt in the...
Embodiment 2
[0041] Embodiment 2: reclaim rare earth carbonate from waste hydrogen storage alloy powder
[0042] Process see figure 1 . Include the following steps:
[0043] Raw materials: waste materials from the production process of hydrogen storage alloy powder of a certain company, the main components (%) are shown in Table 5.
[0044] The main component list of raw materials used in table 5 embodiment 2
[0045]
[0046] Sulfuric acid leaching of waste hydrogen storage alloy powder: by controlling the temperature of the leaching reaction at 90-95°C, adding sulfuric acid as an oxidant, and under the action of stirring, acidolyze the waste hydrogen storage alloy powder for 2-3 hours, and control the acidity at the end point to 20-60g / l, the metal components in the leachate are listed in Table 6:
[0047] The leaching (g / l) table of waste hydrogen storage alloy powder of table 6
[0048]
[0049] Conversion of rare earth sulfate double salt: the leaching reaction temperature...
Embodiment 3
[0055] Embodiment 3: reclaim rare earth carbonate from waste hydrogen storage alloy powder
[0056] Process see figure 1 . Include the following steps:
[0057] Raw materials: waste materials in the production process of hydrogen storage alloy powder of a certain company, the main components (%) are shown in Table 9.
[0058] The main component list of raw materials used in table 9 embodiment 3
[0059]
[0060] Sulfuric acid leaching of waste hydrogen storage alloy powder: by controlling the temperature of the leaching reaction at 90-95°C, adding sulfuric acid as an oxidant, and under the action of stirring, acidolyze the waste hydrogen storage alloy powder for 2-3 hours, and control the acidity at the end point to 20-60g / l, the metal components in the leachate are listed in Table 10:
[0061] The leaching (g / l) table of waste hydrogen storage alloy powder of table 10
[0062]
[0063] Conversion of rare earth sulfate double salt: the leaching reaction temperature...
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