Purification method and application of secondary zinc oxide
A secondary zinc oxide and purification method technology, applied in the field of metallurgy and chemical industry, can solve the problems of complex sewage treatment, high treatment costs, and lengthy processes, and achieve the effects of smooth process, low cost, and environmental friendliness
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Embodiment 1
[0019] A method for purifying secondary zinc oxide, the specific steps are as follows:
[0020] (1) Add industrial sulfuric acid to the soot containing secondary zinc oxide, the secondary zinc oxide soot and industrial sulfuric acid are mixed with a mixing device, and granulated by a disc granulator; the mass percentage of secondary zinc oxide soot and industrial sulfuric acid is 100% : 10, industrial sulfuric acid is added at one time; the particle size of granulation is 8mm;
[0021] (2) Roasting the particles obtained in step (1) in a rotary kiln at a temperature of 600° C. for 5 hours to finally obtain purified secondary zinc oxide.
[0022] A kind of application of secondary zinc oxide, concrete steps are as follows:
[0023] (1) adding 3 times the volume of electrolyte residue to the purified secondary zinc oxide for leaching, and controlling the leaching end point pH to 3.3 by adding industrial sulfuric acid, leaching for 4 hours, and filtering and separating to obtain...
Embodiment 2
[0027] A method for purifying secondary zinc oxide, the specific steps are as follows:
[0028] (1) Add industrial sulfuric acid to secondary zinc oxide soot, mix the secondary zinc oxide soot and industrial sulfuric acid with a mixing device, and granulate through a disc granulation device; the mass percentage of secondary zinc oxide soot and industrial sulfuric acid is 100:15 , industrial sulfuric acid is added at one time; the particle size of granulation is 11mm;
[0029] (2) Roasting the particles obtained in step (1) in a rotary kiln at a temperature of 700° C. for 4 hours to finally obtain purified secondary zinc oxide.
[0030] A kind of application of secondary zinc oxide, concrete steps are as follows:
[0031] (1) Add 4 times the volume of electrolyte residue to the purified secondary zinc oxide for leaching, and add industrial sulfuric acid to control the pH of the leaching end point to be 3.7, leaching for 4.5 hours, and filter and separate to obtain the leaching...
Embodiment 3
[0035] A method for purifying secondary zinc oxide, the specific steps are as follows:
[0036] (1) Add industrial sulfuric acid to secondary zinc oxide soot, mix the secondary zinc oxide soot and industrial sulfuric acid with a mixing device, and granulate through a disc granulation device; the mass percentage of secondary zinc oxide soot and industrial sulfuric acid is 100:20 , industrial sulfuric acid is added at one time; the particle size of granulation is 15mm;
[0037] (2) Roasting the particles obtained in step (1) in a rotary kiln at a temperature of 800° C. for 3 hours to finally obtain purified secondary zinc oxide.
[0038] A kind of application of secondary zinc oxide, concrete steps are as follows:
[0039] (1) Add 5 times the volume of electrolyte raffinate to the purified secondary zinc oxide for leaching, and add industrial sulfuric acid to control the leaching end point pH to 4.1, leaching for 5 hours, and filtering and separating to obtain the leaching solu...
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