In this manganese separation process, manganese oxide ore is first reduced and roasted to reduce weakly magnetic limonite in manganese ore to magnetite, and then iron and manganese ore are separated in a weak magnetic separator, so that the grade of manganese ore can be improved. The matching manganese separation equipment is suitable for occasions with low requirements on manganese grid and dischargeability. If these two properties are required, please choose another manganese separation process.
2. "Roasting-gravity separation-low intensity magnetic separation" manganese separation process and supporting manganese separation equipment
The manganese separation process of roasting-low intensity magnetic separation can finally obtain secondary manganese concentrate. Statistical data show that the iron concentrate obtained by low intensity magnetic separation has low iron content and high manganese content. Therefore, according to the mineral density measurement and gravity separation test data before and after roasting, experts of manganese separation equipment added gravity separation to the above-mentioned beneficiation process, with the aim of discarding timely gangue minerals and then carrying out low-intensity magnetic separation.
3 "Mud washing-classification-high intensity magnetic separation" manganese separation process
According to the statistics of experts in selected manganese equipment, the manganese grade of manganese ores in China is mostly low, and most of them are clay minerals, which means that clay and debris coexist in time. Therefore, this set of manganese separation equipment first adopts mud washing operation to remove clay minerals simply and effectively. According to mechanics experts, about 30% of the outer layer of manganese nodules is composed of manganese ore, limonite, clay and timing. Therefore, in the subsequent manganese separation process, limonite is separated by high intensity magnetic separation, and the obtained high intensity magnetic separation tailings are used as manganese concentrate.
4 pyrometallurgical manganese enrichment separation process
There are many customer cases that manganese iron ore and high phosphorus manganese ore are treated by pyrometallurgical manganese enrichment process, and some manganese dressing equipment manufacturers use two-step pyrometallurgical smelting to produce ferromanganese.
5 "leaching-roasting" manganese separation process
In a tin concentrator, the by-product of tin ore contains Mn 14% ~ 16% manganese nodules. On this basis, sulfate was prepared by leaching by-products with sulfur dioxide, and then manganese concentrate containing 60% ~ 65% manganese was obtained by roasting and decomposition.
6 nitric acid treatment manganese separation process
Active manganese dioxide is produced by nitric acid treatment process of lead-zinc-manganese ore. Treatment contains 24% ~ 26% manganese. Manganese ore containing Fe 14% ~ 16% can obtain active manganese dioxide containing MnO 9 1% ~ 93% and Fe0.15%.
The above is provided by Songyang Machinery.