Method for recovering magnesium from ferronickel slag
A technology of ferronickel slag and seed crystals, which is applied in the field of magnesium recovery, can solve the problems of high equipment, reduction conditions and safety requirements, and the inability to carry out industrial application, so as to improve comprehensive utilization rate, high added value of products, and avoid dissolution loss Effect
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Embodiment 1
[0050] Such as figure 1 Shown, present embodiment relates to a kind of method that reclaims magnesium from ferronickel slag, comprises the following steps:
[0051] S1. Pretreatment: Dry the ferronickel slag at 105°C for 12 hours, set the rotation speed on the planetary ball mill to 300r / min, the revolution speed to 600r / min, and the grinding time for 3 hours. After ball milling, pass through a 300-mesh sieve to obtain the particle size The ferronickel slag powder smaller than 38μm, in order to ensure that the nickel slag used in each group of tests has the same composition, the particles larger than 38μm are returned to the next batch of ball milling, and so on, and finally all the batches of sieved materials are mixed evenly, and the obtained Ferronickel slag fine powder as solute.
[0052] S2, leaching: take by weighing 20g ferronickel slag fine powder and place in the there-necked flask, under the condition that the liquid-solid ratio is 20:1 (ml / g), add the sulfuric acid...
Embodiment 2
[0058] Present embodiment relates to a kind of method that reclaims magnesium from ferronickel slag, comprises the following steps:
[0059] S1. Pretreatment: Dry the ferronickel slag at 105°C for 8 hours, set the rotation speed on the planetary ball mill to 250r / min, the revolution speed to 500r / min, and the grinding time for 6 hours. After ball milling, pass through a 300-mesh sieve to obtain the particle size The ferronickel slag powder smaller than 38μm, in order to ensure that the nickel slag used in each group of tests has the same composition, the particles larger than 38μm are returned to the next batch of ball milling, and so on, and finally all the batches of sieved materials are mixed evenly, and the obtained Ferronickel slag fine powder as solute.
[0060] S2, leaching: Weigh 20g of ferronickel slag fine powder and place it in a three-necked flask. Under the condition that the liquid-solid ratio is 10:1 (ml / g), add a sulfuric acid solution with a concentration of 1...
Embodiment 3
[0064] Present embodiment relates to a kind of method that reclaims magnesium from ferronickel slag, comprises the following steps:
[0065] S1. Pretreatment: Dry the ferronickel slag at 130°C for 6 hours, set the rotation speed on the planetary ball mill to 200r / min, the revolution speed to 400r / min, and the grinding time for 5 hours. After ball milling, pass through a 300-mesh sieve to obtain a particle size 38μm ferronickel slag powder, in order to ensure that the nickel slag used in each group of tests has the same composition, the particles larger than 38μm are returned to the next batch of ball milling, and so on. Iron slag fine powder is used as solute.
[0066] S2. Leaching: Weigh 20g of ferronickel slag fine powder and place it in a three-necked flask. Under the condition that the liquid-solid ratio is 20:1 (ml / g), add a sulfuric acid solution with a concentration of 15N without adding a cosolvent, and then put the flask Move it into a constant temperature heating ma...
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