Method for increasing manganese leaching rate in low-grade manganese ore
A low-grade manganese ore and leaching rate technology, applied in the field of metallurgy, can solve the problems of large output of manganese slag and high energy consumption of electrolysis, and achieve the effects of improving leaching, reducing pollution and improving comprehensive utilization rate.
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Embodiment 1
[0023] A method for improving the manganese leaching rate in low-grade manganese ore, comprising the following steps:
[0024] (1) During the ore leaching process, the weight ratio of low-grade manganese ore to liquid is 0.95:5, the weight ratio of sulfuric acid to low-grade manganese ore is 2.9:1, and the input amount of surfactant is 19ppm. Under the condition of ℃, react for 4.8h, stand still for 15min, and obtain the manganese ore leaching solution, the mass percentage of +2 valent metal manganese in the described low-grade manganese ore is 19.00%, the mass percentage of +4 valent metal manganese is 0.45%, and the surfactant Be OP-10, described sulfuric acid is the concentrated sulfuric acid that mass percent is 96.5%;
[0025] (2) Use manganese powder to oxidize and remove iron from the manganese ore leaching solution, adjust the pH of the manganese ore leaching solution to 6.5 with Shuangfei powder, and perform the first pressure filtration under the condition of 0.05MPa...
Embodiment 2
[0031] A method for improving the manganese leaching rate in low-grade manganese ore, comprising the following steps:
[0032] (1) During the ore leaching process, the weight ratio of low-grade manganese ore to liquid is 1.05:5, the weight ratio of sulfuric acid to low-grade manganese ore is 3.1:1, and the input amount of surfactant is 21ppm. Under the condition of ℃, react for 5.2h, stand still for 15min, and obtain the manganese ore leaching solution, the mass percent of +2 valent metal manganese in the described low-grade manganese ore is 19.10%, the mass percent of +4 valent metal manganese is 0.55%, and the surfactant Be OP-10, described sulfuric acid is the concentrated sulfuric acid that mass percent is 98.5%;
[0033] (2) Use manganese powder to oxidize and remove iron from the manganese ore leaching solution, adjust the pH of the manganese ore leaching solution to 7.0 with Shuangfei powder, and perform the first pressure filtration at a pressure of 0.15 MPa to obtain ...
Embodiment 3
[0039] A method for improving the manganese leaching rate in low-grade manganese ore, comprising the following steps:
[0040] (1) During the ore leaching process, the weight ratio of low-grade manganese ore to liquid is 1.02:5, the weight ratio of sulfuric acid to low-grade manganese ore is 3:1, and the input amount of surfactant is 20ppm. Under the condition of ℃, react for 5h, let it stand for 15min, and obtain the manganese ore leachate, the mass percentage of +2 metal manganese in the low-grade manganese ore is 19.05%, the mass percentage of +4 metal manganese is 0.50%, and the surfactant is OP-10, described sulfuric acid is the concentrated sulfuric acid that mass percent is 97.5%;
[0041] (2) Use manganese powder to oxidize and remove iron from the manganese ore leaching solution, adjust the pH of the manganese ore leaching solution to 6.7 with Shuangfei powder, and perform the first pressure filtration under the condition of 0.10 MPa to obtain the first pressure filtr...
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