A kind of graphite ore low-grade medium ore sorting method
A low-grade, graphite technology, used in flotation, solid separation, grain processing, etc., can solve the problems of reduced graphite concentrate recovery rate, high medium mineral rate, poor crushing and dissociation effect, etc., to optimize the flotation environment, The effect of reducing the fixed carbon content and shortening the work flow
Active Publication Date: 2022-04-12
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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Problems solved by technology
The crushing principle of the high-pressure roller mill is the crushing of the material layer. The crushing and dissociation effect of the unique embedded structure interspersed with graphite and mica is very poor, resulting in a large yield of low-grade and medium minerals in the front stage of mass separation. The high-grade medium ore has not been further effectively treated, and then it is accumulated in the tailings and discharged, resulting in a substantial increase in the fixed carbon content of the tailings, and a significant decrease in the overall recovery rate of graphite concentrate
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Embodiment 1
[0045] Adopt a kind of graphite ore low-grade middling ore separation method described in the present invention to carry out separation to described ore, test procedure sees Figure 7 , in step (2), a tower mill is selected for stirring and grinding the low-grade medium ore, and the grinding particle size-0.15mm accounts for 83%. The coarse-grained low-quality product (abbreviation: coarse-grained low-quality product) after the step (3) is separated after three stages of regrinding and flotation for three times to obtain concentrate 1, and the fine-grained high-quality product (abbreviated: fine-grained high-quality product) after the quality separation is obtained. product) after four stages of regrinding and flotation for four times to obtain concentrate 2, and the separation results are shown in Table 3. By adopting the separation method of the present invention, the fixed carbon content in the final tailings is reduced to 0.87%, and concentrate 1 and concentrate Mine 2 is ...
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The present invention proposes a low-grade middle ore sorting method for graphite ore, which includes the following steps: (1) The raw ore is crushed in a closed circuit by a high-pressure roller mill, and the crushed products that reach the required particle size enter "one-stage roughing, one-stage refining, and one-stage sweeping". (2) One-stage selection obtained concentrated ore and concentrated tailings, and one-stage sweeping obtained scavenging concentrate and scavenging tailings, and the selected tailings and scavenging concentrate were combined into low-grade medium ore, the low-grade middle ore is stirred and ground and then floated again to obtain re-selected tailings and re-selected concentrate, and the re-selected tailings and scavenging tailings are combined into final tailings; (3) selected concentrate and re-selected After the concentrates are merged, they enter the quality separation operation to obtain coarse-grained low-quality product concentrates and fine-grained high-quality product concentrates. The invention reduces the fixed carbon content in the final tailings, improves the recovery rate of the final concentrate, regrinds and re-selects the low-grade medium ore, discharges a large amount of gangue minerals as soon as possible, and greatly shortens the separation and separation process.
Description
technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for separating low-grade medium ore of graphite ore. Background technique [0002] Graphite is a non-metallic material with stable properties and layered structure, which is widely used in metallurgy, machinery, electronics, aerospace and other fields. The known graphite deposits with industrial value in my country can be divided into three types according to their genesis: regional metamorphic graphite deposits, contact metamorphic graphite deposits and lecture hydrothermal graphite deposits. Among them, regional metamorphic deposits account for more than 80% of the known graphite deposits in my country, and are the main source of natural graphite resources in my country. This type of graphite deposit has low fixed carbon content, and there are more than 30 kinds of minerals that coexist with graphite in the ore, mainly including feldspar, quartz, mica, calc...
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IPC IPC(8): B02C21/00B02C4/02B03D1/00
CPCB02C21/00B02C4/02B03D1/00
Inventor 刘磊郭理想王守敬张然
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD