Gold powder washing purification method
A technology of gold powder and reactor, which is applied in the field of purification, can solve the problems of long production cycle and capital backlog, and achieve the effect of short production cycle and reducing backlog time
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Embodiment 1
[0013] A method for washing and purifying gold powder of the present embodiment comprises the following steps:
[0014] 1) Put the gold powder in the enamel reaction kettle, add water according to the mass ratio of 3:1, then start the stirring device, pass steam into the interlayer of the reaction kettle, and raise the temperature to 90°C, under the condition of 90°C Carry out washing gold powder, washing time is 5h, carry out liquid-solid separation after cleaning the salt content easily soluble in water, carry out the next step washing of separated gold powder;
[0015] 2) Put the gold powder separated in step 1) into the reaction kettle, add nitric acid with a concentration of 30% according to the mass ratio of 3:1, then start the stirring device, feed steam into the interlayer of the reaction kettle, and heat up to 90 ℃, wash the gold powder under the condition that the temperature is 90 ℃, and the washing time is 5h. After washing the metal impurities easily soluble in ni...
Embodiment 2
[0021] A method for washing and purifying gold powder of the present embodiment comprises the following steps:
[0022] 1) Put the gold powder in the enamel reaction kettle, add water according to the mass ratio of 3:1, then start the stirring device, pass steam into the interlayer of the reaction kettle, and raise the temperature to 90°C, under the condition of 90°C Carry out washing gold powder, washing time is 6h, carry out liquid-solid separation after cleaning the salt easily soluble in water, carry out the next step washing of separated gold powder;
[0023] 2) Put the gold powder separated in step 1) into the reaction kettle, add nitric acid with a concentration of 30% according to the mass ratio of 3:1, then start the stirring device, feed steam into the interlayer of the reaction kettle, and heat up to 90 ℃, wash the gold powder under the condition that the temperature is 90 ℃, and the washing time is 6 hours. After washing the metal impurities easily soluble in nitri...
Embodiment 3
[0029] A method for washing and purifying gold powder of the present embodiment comprises the following steps:
[0030] 1) Put the gold powder in the enamel reaction kettle, add water according to the mass ratio of 3:1, then start the stirring device, pass steam into the interlayer of the reaction kettle, and raise the temperature to 90°C, under the condition of 90°C Carry out washing gold powder, washing time is 5.5h, carry out liquid-solid separation after cleaning the salt easily soluble in water, carry out the next step washing of separated gold powder;
[0031] 2) Put the gold powder separated in step 1) into the reaction kettle, add nitric acid with a concentration of 30% according to the mass ratio of 3:1, then start the stirring device, feed steam into the interlayer of the reaction kettle, and heat up to 90 ℃, wash the gold powder under the condition that the temperature is 90 ℃, and the washing time is 5.5h. After washing the metal impurities easily soluble in nitric...
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