Zinc concentrate carbon-adding oxidizing roasting and leaching method
A zinc concentrate and carbon oxidation technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of large area occupation, complicated process, high energy consumption, etc., achieve low energy consumption, simple process, and reduce production volume effect
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Embodiment 1
[0036] (1) The zinc concentrate is crushed, collected and bagged after passing through a 200-mesh sieve, and 20g of zinc concentrate I and 3.0% of the dust-removing ash relative to the mass of the zinc concentrate are weighed by an electronic balance and evenly placed in the corundum ark. , the tube furnace is heated to 900 degrees Celsius, and then the mixture of zinc concentrate with carbonaceous reducing agent is placed in the tube furnace for heating, stirring once every 10 minutes to make it fully react, and after 1 hour of roasting, the The ark was cooled naturally at room temperature, and the calcine was cooled and then ground in a mortar.
[0037] (2) Weighing 10g of calcine, according to the mass ratio of zinc calcine to dilute acid solution I 1:15, weigh 150g of dilute sulfuric acid with a concentration of 30g / L for neutral leaching. The leaching time was 2 hours, and the pH value of the leaching end point was 5.0. The mixed solution is filtered to obtain intermedia...
Embodiment 2
[0040](1) The zinc concentrate is crushed, collected and bagged after passing through a 200-mesh sieve, and 20g of zinc concentrate I and 3% of the coke relative to the mass of the zinc concentrate are weighed by an electronic balance and evenly placed in the corundum ark. The tube furnace was heated to 750 degrees Celsius, and then the mixture of zinc concentrate with carbonaceous reducing agent was placed in the tube furnace for heating, and stirred every 10 minutes to make it fully react. After 1 hour of roasting, the ark was heated. Cool naturally at room temperature, and place the calcine in a mortar for grinding after cooling.
[0041] (2) Weighing 10g of calcine, according to the mass ratio of zinc calcine to dilute acid solution I 1:15, weigh 150g of dilute sulfuric acid solution with a concentration of 30g / L for neutral leaching. The leaching time was 2 hours, and the pH value of the leaching end point was 5.0. The mixed solution is filtered to obtain intermediate le...
Embodiment 3
[0044] (1) The zinc concentrate is crushed, collected and bagged after passing through a 200-mesh sieve, and 20g of zinc concentrate I and 3% of the coke relative to the mass of the zinc concentrate are weighed by an electronic balance and evenly placed in the corundum ark. The tube furnace is heated to 900 degrees Celsius, and then the mixture of zinc concentrate containing carbonaceous reducing agent is placed in the tube furnace for heating, stirring once every 10 minutes to make it fully react, and after 1 hour of roasting, the ark is heated. Cool naturally at room temperature, and place the calcine in a mortar for grinding after cooling.
[0045] (2) Weighing 10g of calcine, according to the mass ratio of zinc calcine to dilute acid solution I 1:15, weigh 150g of dilute sulfuric acid solution with a concentration of 30g / L for neutral leaching. The leaching time was 2 hours, and the pH value of the leaching end point was 5.0. The mixed solution is filtered to obtain inter...
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