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Click to add WeChatJJF flotation machine is a mechanical agitation flotation machine equipment with large impeller height, large blade area, shallow installation depth, The mixing degree is moderate, the solid particles are well suspended, the tank does not sink, the slurry circulation characteristics are good, and there is no need to discharge the ore when parking; the liquid level is stable, the sorting efficiency is high; the peripheral speed is low, the power consumption is low; the wearing parts have a long life and are easy to maintain; the equipment It has a false bottom and a guide tube; has the ability to self-prime air; and occupies a small area.
The copper-nickel sulfur ore concentrator has 3 independent The mineral processing production workshop includes 4 crushing systems, 8 grinding and 2 flotation systems, two concentrate dewatering systems, and a tailings return water utilization and tailings treatment system. At present, the copper-nickel sulfide ore processed by the ore concentrator includes many rich ores and poor ores. The main process flows include: crushing and screening, grinding and classification, flotation, concentrate dehydration, tailings treatment, etc. The main process features are: adopting the mixed flotation process of "stage grinding-stage separation", combined with efficient Ore beneficiation agent, on the premise of ensuring that the magnesium oxide is qualified, a copper-nickel mixed concentrate with a high recovery rate can be obtained.
A certain copper-nickel sulfide ore concentrator selected jjf type flotation machine for the first time because of the transformation of the ore concentrator, converting A-type flotation machine The machine was replaced with a jjf-4 flotation machine. Compared with the "A" type flotation machine, the JJF-4 type flotation machine has higher technical indicators such as nickel recovery rate and concentrate grade, and lower power consumption. Comprehensive consideration, the coarse and sweeping operations of the 1# system were " Technical transformation work to replace A” type flotation machine with JJF-4 type flotation machine.
Due to the good application effect, selected operations of the two systems were successively replaced and modified. Later, during the capacity expansion and transformation of the first selection workshop, the number of flotation machines for the coarse and sweep operations of the two systems was appropriately increased, resulting in a current total of 57 flotation machines for each system and a total of 114 flotation machines for the two systems. Based on the successful use of the JJF-4 flotation machine in the first selection workshop, the second selection workshop has also successively applied various types of JJF type flotation machines in some selection operations of the 3#, 4#, and 5# systems. , a total of 187 JJF flotation machines of various models were used in this copper-nickel-sulfur concentrator.
The concentrator uses 187 JJF flotation machines of various specifications, and 114 units are used in the first selection workshop. The first and second stages of rough selection, sweep selection, and selection of the two systems are in progress. The second selection workshop uses 73 units in the selection operation, including 22 units of the 3# system, including 8 units of the JJF-4 type selected in the first stage, 14 units of the JJF-4 type selected in the second stage; 37 units of the 4# system, including the first stage selection Select 7 JJF-8 models, 8 JJF-4 models for secondary selection, 8 JJF-4 models for second-stage selection, 6 JJF-4 models for secondary selection, and JJF-4 type two-stage selection. 8 units; 14 units in 5# system, including 8 units of JJF-8 type for primary selection and 6 units of JJF-8 type for secondary selection.
In the early stage of application, due to lack of experience in use and other reasons, the JJF flotation machine failed to accumulate ore during roughing and sweeping operations. It is quite serious, especially at the bottom four corners of the flotation machine. Every time it is stopped for maintenance, the ore must be discharged and flushed, causing a certain degree of metal loss and increasing the labor intensity of the workers. In the later period, through appropriate adjustments to the aeration volume, grinding fineness, flotation concentration, etc., this situation was alleviated, but it was still not fundamentally solved. Judging from the current usage, in rough and sweeping operations, due to the coarse mineral particles, mineral particle deposition will still be formed at the bottom edge (especially the four corners); while in the fine selection operation, due to the relatively small size of the mineral particles, Fine, the application effect is better.
The use of JJF type flotation machine in beneficiation operations is that the recovery rate of a stage of beneficiation (including primary and secondary beneficiation) of each system is generally 85% to 99%, and the enrichment The ratio is between 1.2 and 2.2, which is generally higher than the recovery rate and enrichment ratio of the second stage selection.
However, judging from the entire situation examined, under the conditions of basically stable flotation concentration and fineness, when the enrichment ratio is controlled at a high level (in on-site operations, the scraping volume is small and the yield is Smaller), part of the operating recovery rate will be lost; conversely, when the enrichment ratio is controlled to be low (in on-site operations, the scraping volume is large and the yield is large), the operating recovery rate will be relatively high.
The literature is excerpted from Mining Engineering, Volume 4, Issue 6
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