Combined desliming process capable of being used for beneficiation
A desliming and process technology, applied in the field of combined desliming process of mineral processing, to achieve the effect of small loss of iron ore with mud, easy control and easy maintenance
Active Publication Date: 2014-08-06
ZHONGYE-CHANGTIAN INT ENG CO LTD +1
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Problems solved by technology
Based on the characteristics of this kind of ore resources, desliming has gradually become an important operation step in the whole process plan. A reasonable desliming plan increases the feasibility of realizing the comprehensive development and utilization of related resources through ore dressing, but the thickener is used as the desliming equipment. There is no industrial practice at home and abroad for three or more stages of selective flocculation and desliming processes
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[0039] a kind of like figure 1 Shown the combined desliming process for mineral processing of the present invention, comprises the following steps:
[0040] (1) A fine-grained iron ore whose particle size after crushing is controlled below 10 mm (assuming a production scale of 2.3 million t / a, the iron ore is mainly composed of magnetite, hematite and a small amount of false hematite, and Mainly magnetite, the raw ore grade is about 28%, and the particle size of useful minerals is mostly 2μm ~ 30μm) for one-stage grinding (Φ500mm×6 cyclone group-Φ4.5×9m overflow ball mill), one-stage The discharge after grinding is classified for one stage, the underflow after one stage of classification returns to enter one stage of grinding again, and the overflow after one stage of classification enters the next step. Actual control over 76% is acceptable);
[0041] (2) The overflow after the above-mentioned first-stage classification is subjected to the second-stage classification, and ...
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Abstract
The invention discloses a combined desliming process capable of being used for beneficiation. The combined desliming process includes the steps: performing first-stage grinding and first-stage classifying for crushed ore products, returning underflow to first-stage grinding, and performing second-stage classifying for overflow; performing second-stage grinding for the underflow after second-stage classifying, and returning ground discharging to second-stage classifying; subjecting the overflow to low-intensity magnetic separation, performing concentration, slag separation and high-intensity magnetic separation which has the effect of first-stage desliming for tailings subjected to low-intensity magnetic separation, and subjecting magnetic concentrates to third-stage classifying; performing third-stage grinding for the classified underflow, and returning the discharging to third-stage classifying; and subjecting the overflow to second-stage desliming, performing low-intensity magnetic roughing separation for the underflow after second-stage desliming to obtain rough concentrates, and subjecting the tailings to third-stage or more than fourth-stage desliming. Besides, a densifier and a selective flocculation desliming process are adopted for desliming at each stage. The combined desliming process capable of being used for beneficiation has the advantages of low investment cost, small occupied area, convenience in production and maintenance, high adaptability, good desliming effect and the like.
Description
technical field [0001] The invention relates to an ore desliming process, in particular to a combined desliming process which can be used for ore dressing. Background technique [0002] my country's iron ore resources are characterized by a lot of lean ore, a lot of fine-grained inlays, and complex types of ore, that is, poor, fine, and miscellaneous. With the rapid development of my country's iron and steel industry, rich iron ore and easy-to-select iron ore resources are becoming less and less, and the remaining iron ore is mainly poor, fine, miscellaneous and difficult-to-select iron ore, and the current development and utilization rate is low . In this context, it has become more and more important to fully develop the existing iron ore. In order to develop this part of ore resources, it is necessary to crush and finely grind the ore to fully realize the monomer dissociation of useful minerals. However, in the process of fine grinding, due to the differences in the gri...
Claims
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IPC IPC(8): B03B7/00B02C21/00B03D3/06
Inventor 王海波余永富吴革雄陈雯肖业俭严小虎张庆唐雪峰欧阳魁刘小银陈鹏李家林
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD