A kind of beneficiation method of fine-grained hematite ore
A technology of red limonite and ore dressing method, which is applied in chemical instruments and methods, solid separation, magnetic separation, etc., can solve the problems of complex process, high production cost, and low recovery rate, and achieve simple process, low cost, and high recovery high rate effect
Active Publication Date: 2021-12-07
CHANGSHA RES INST OF MINING & METALLURGY
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Problems solved by technology
There has been no ideal beneficiation and recovery method for fine-grained red limonite ore. When most iron ore enterprises in my country develop and utilize this type of iron ore, they often only recycle magnetite that is easy to separate. Complex refractory iron ores such as red limonite ore are ignored, resulting in a low overall utilization rate of this type of iron ore
[0004] At present, domestically, the beneficiation methods of "roasting-magnetic separation", "magnetic separation-reverse flotation" and "magnetic separation-gravity separation-flotation" are mainly used in the beneficiation of red limonite, but there are some problems, such as " The mineral processing methods of "roasting-magnetic separation" and "magnetic separation-reverse flotation" often have problems such as unsatisfactory indicators, high production costs, and harmful to the ecological environment; while the mineral processing methods of "magnetic separation-gravity separation-flotation" have problems Problems such as complicated process, low recovery rate and high production cost
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Embodiment 1
[0034] The fine-grained hematite ore processed in this embodiment is the raw ore provided by Hainan Mining Co., Ltd., and its grade is 41.49%. The raw ore sample was analyzed by chemical multi-element and iron phase, and the results are shown in Table 1 and Table 2.
[0035] Table 1 Results of multi-element analysis of raw ore (%)
[0036]
[0037] The results of multi-element analysis show that the available element in the raw ore is iron, and the main impurity is SiO 2 、Al 2 o 3 , S, P content is low, has little effect on the quality of iron ore concentrate, and the burning loss is 2.71%, which is an acid ore.
[0038] Table 2 Analysis results of raw ore iron phase (%)
[0039]
[0040] The results of iron phase analysis show that the main useful minerals in the ore are hematite, followed by magnetite. Hematite accounts for 72.38%, magnetite accounts for 23.27%, and pyrite accounts for 0.53%.
[0041] A kind of beneficiation method of microfine-grained red limonit...
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Abstract
The invention provides a fine-grained red limonite ore dressing method, specifically: crushing and grading the raw ore samples, making pulp and feeding them into a ZCLA concentrator for tailings to obtain ZCLA concentrate samples and tailing samples; ZCLA The concentrated ore sample is ground for one stage, and the overflow pulp and graded grit ore are obtained by classification. The overflow pulp is roughly separated by a ZH type multi-stage combination strong magnetic separator. The field strength of the separation turntables in different layers is from top to bottom. Intensify sequentially, corresponding to ZH type multi-stage combination strong magnetic separation concentrate products with different magnetic properties and a section of ZH combination strong magnetic separation tailings; return the graded grit ore to the mill for grinding; the resulting magnetic field strength is at 500‑5000GS The ZH combination high-strength magnetic separation concentrate products in the interval are subjected to the second stage of grinding, and then mixed with the rest of the ZH type multi-level combination high-strength magnetic separation concentrate products, and then fed to the ZH type multi-level combination high-strength magnetic separation machine for Concentrate to obtain the final iron concentrate product and the tailings of the second-stage ZH combined strong magnetic separation.
Description
technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a beneficiation method of fine-grained hematite. Background technique [0002] Iron ore is an important bulk metal mineral resource in China. China is rich in iron ore resources, and its proven resource reserves rank fifth in the world. However, the grade of China's iron ore resources is generally low. With the rapid development of China's iron and steel industry in recent years, domestic iron ore is far from meeting demand, and a large number of imports are relied on, endangering China's resources and economic security. Therefore, it is of great practical significance to solve the crisis of iron ore resources in China to carry out research on the efficient recycling and utilization of low-grade and refractory complex iron ore resources in China. [0003] Red limonite, especially fine-grained red limonite, is currently recognized as a complex refractor...
Claims
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IPC IPC(8): B03C1/30
CPCB03C1/30
Inventor 袁铭泽洪润江白利宾黄雄林豆中磊付亦文李文杰
Owner CHANGSHA RES INST OF MINING & METALLURGY