A fast flotation method for large flake graphite classification

By using large scales graphite grading to quickly flotate in the graphite mining process, use screening equipment and hydraulic spinners to separate granularity, and select high -quality graphite concentrates through fast flotation technology to solve the large scales graphite. The serious damage during the abrasive process achieved the effect of efficient recycling and protecting large scales graphite.

CN115318428BActive Publication Date: 2025-01-28ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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Patent Information

Application Number
CN202210868951.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-07-22
Publication Date
2025-01-28
Estimated Expiration
2042-07-22

AI Technical Summary

Technical Problem

The existing graphite ore dressing process is difficult to effectively protect the large scale graphite, resulting in serious damage during the grinding process and cannot meet the market's demand for high-grade large scale graphite.

Method used

Using large scales graphite grading rapid flotation methods, through screening equipment and hydraulic spinners for grain separation, reducing the damage of scales of spiral blades, and using fast flotal technology to select floating graphite concentrates , Shorten the number of large scales graphite to avoid excessive damage.

Benefits of technology

Under the condition of ensuring the fixed carbon recovery rate of graphite concentrates, the fixed carbon content in graphite concentrate is increased, the proportion of +100 mesh scales graphite ratio is significantly increased, and the loss of carbon fixed in the tailings is reduced.

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Abstract

The present invention proposes a large scale flake graphite classification rapid flotation method, comprising the following steps: (1) the raw ore is subjected to grinding and screening to obtain undersize and oversize, the oversize is returned to the grinding operation, the undersize enters the hydrocyclone for particle size separation, and a grit product and an overflow product are obtained; (2) the overflow product is subjected to a roughing selection to obtain a final tailing and a roughing concentrate, the roughing concentrate is subjected to a re-grinding and re-selection to obtain a re-selection concentrate; (3) the grit product is subjected to a rapid flotation operation to obtain a rapid flotation concentrate and a flotation tailing, and the flotation tailing is returned to the grinding operation in step (1); (4) the rapid flotation concentrate is combined with the re-selection concentrate and subjected to multiple stages of re-grinding and re-selection to obtain a graphite concentrate. The method of the present invention improves the fixed carbon content in the graphite concentrate under the condition of ensuring the fixed carbon recovery rate of the graphite concentrate, and the proportion of +100 mesh flake graphite is greatly increased, thereby avoiding the serious loss of fixed carbon in the tailings due to the protection of large flakes.
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Citation Information

Patent Citations

  • Fine flaky-cryptocrystalline mixed graphite separation technique

    CN102773152A

  • Extra large crystalline flake graphite ore blending roughing method

    CN111715397A