Fenghuangshan copper mine ores with native belonging chalcopyrite - pyrite - magnetite - siderite - mixing hematite ore symbiotic combination. Beneficiation plant design process for the first original copper and sulfur flotation after grinding, and recovering the ferromagnetic mineral with a weak magnetic separation, magnetic separation tailings grading, + 37pm downhole filling, -37pm then discharged into the Tailings . The large amount of siderite contained in the tailings is not recycled. In order to strengthen the further comprehensive recovery of resources, a detailed study was carried out on the whole tailings of the Fenghuangshan Copper Mine. The test results show that the Shep wet magnetic machine can be used to recover the siderite. The _ times rough selection and one selection process can obtain iron with about 44% iron (58% iron after burning loss) and 30% recovery rate. ore mine ore annual processing 550,000 t, recycled nearly 70,000 t of iron ore concentrate per year, for Tongling Nonferrous metals company, part of the solution raw material source of iron pellets national recycling economy project. I. Brief description of ore properties The Fenghuangshan copper mine is mainly composed of copper-bearing skarn ore and copper-bearing magnetite ore. The copper mineral is mainly chalcopyrite, the sulfur mineral is mainly pyrite, and the iron mineral is magnetite and siderite. Hematite and so on. The main chemical components of tailings after flotation and weak magnetic separation are shown in Table 1. The iron phase is shown in Table 2. Table 1 Analysis results of main chemical components of flotation and weak magnetic separation tailings Table 2 Results of iron phase analysis of flotation and weak magnetic separation tailings The metal minerals in tailings include siderite, hematite, magnetite, pyrite, chalcopyrite, and gangue minerals such as quartz , chalcedony, garnet , calcite , dolomite, etc. Through the analysis of mineral inlaid particle size and monomer dissociation degree, when the -0.074mm particle size accounts for 69.5%, there are still about half of the iron minerals and gangue minerals, and the siderite and silicate gangue Minerals are continuous. Hematite is associated with both silicate and carbonate minerals. Magnetite is mostly associated with quartz and chalcedony minerals, and their inlay relationship is complex. The content of the magnetic mineral in the tailings is about 1%. The sample taken in the test is a full tailings sample of the Fenghuangshan Copper Mine. The sample is taken in batches according to the mining conditions of the production process, and then mixed and prepared, which has a good representativeness. The iron content of the sample was 21.48%. Second, the process plan selection Reverse flotation is suitable for the selection of iron ore or coarse concentrates with less quartz, silicate or other gangue minerals. It is made of quartz or silicate with magnetite and hematite. The difference is reverse flotation. The anti-flotation test of the combination of anion and cation collectors and inhibitors was discussed respectively. The results showed that the ideal sorting effect was not obtained. This may be because the siderite is floated together with gangue minerals such as quartz during reverse flotation. For the sake of it. Therefore, the reverse flotation scheme is not desirable. In addition, a variety of fatty acid collectors were used for positive flotation experiments in neutral and alkaline slurries, but did not achieve sorting purposes. To this end, the ore was tested using a magnetic separation scheme. Test comparisons were made for the three process scenarios (Figure 1, Figure 2, and Figure 3). Figure 1 Scheme 1 process Figure 2 Scheme 2 process Figure 3 Scheme 3 process Scheme 1: The process is shown in Figure 1. The iron ore concentrate is directly obtained by rough selection of the ore. The rough selection conditions are: magnetic field strength 240kA/m, ore concentration 33%, flushing water 1.08m 3 /h, magnetic separator disk speed 4r/min, tooth gap 5mm, the obtained iron concentrate iron grade is 43.54%, and the iron recovery rate is 15.49%. Scheme 2: The process is shown in Figure 2. The coarse ore is selected by the strong magnetic field, and the coarse concentrate is re-grinded. The crude magnetic field strength is 1008kA/m, the ore feeding speed is 192kg/h, the ore concentration is 40%, and the flushing water is 0.36m. 3 / h, strong magnetic disk speed 4r / min, tooth gap 5mm. The regrind fineness is -0.043mm, the particle size is 79.51%, the strong magnetic selective magnetic field strength is 400kA/m, the flushing water is 1.08m 3 /h, the obtained iron concentrate iron grade is 43.40%, and the iron recovery rate is 32.85%. Scheme 3: The process is shown in Figure 3. After strong magnetic rough selection, direct strong magnetic selection, the obtained iron concentrate iron grade is 44.20%, and the iron recovery rate is 29.91%. Among the above three schemes, scheme 2 is a high-energy process, and the indicator has no advantage and should not be used. Scheme 3 is obviously superior to Scheme 1, so it is better to use scheme 3, that is, strong magnetic rough selection plus strong magnetic selection scheme. Third, the application of Shp-700 wet magnetic separator magnetic separation test results discussion (1) Influencing factors of strong magnetic rough selection 1. Influence of magnetic field strength on coarse magnetic rough selection The test uses 33% of the ore concentration, 1.08m 3 /h of flushing water, the magnetic separator has a pitch of 5mm, the disk rotates 4r/min, and the ore is 4kg per test. The magnetic field strength test results are shown in Table 3. The test results show that the higher the magnetic field strength, the lower the grade of iron concentrate, but the recovery rate will increase significantly. Considering comprehensively, the strength of the rough selected magnetic field is determined to be 1008 kA/m. Table 3 Strong magnetic rough selection magnetic field strength test results 2. Influence of flushing water volume on strong magnetic rough selection The magnetic field strength was 1008kA/m, the ore-feeding speed was 192kg/h, and the comparative tests of the flushing water volume were 0.36m3/h and 1.08m 3 /11 respectively. The iron grades were 32.91% and 33.41%, respectively. The iron recovery rate was obtained. 77.55% and 76.32% iron concentrate. It can be seen that the amount of rough-washing water increases, although the iron grade of iron concentrate concentrate is slightly improved, but the iron recovery rate is reduced. Considering the cost in industrial production in the future, it is appropriate to use 0.36m3/h of flushing water. 3, strong magnetic rough selection optimization test In the magnetic separator 4r/min rotation speed, the tooth spacing is 5mm, the magnetic field magnetic induction intensity is 1008kA/m, the ore feeding speed is 192kg/h, and the flushing water volume is 0.36m3/h. The ore is treated 100kg. The test results are shown in Table 4. . Table 4 Magnetic magnetic strength test results of strong magnetic rough selection (2) Selective test of strong magnetic coarse concentrate 1. Selected magnetic field magnetic induction test The selected test used 40% of the ore concentration, the feed rate of 192 kg/h, and the flushing water volume was 0.36 m 3 . /h, the magnetic separator adopts 4r/min rotation speed and the tooth spacing is 5mm. The magnetic field strength test results are shown in Table 5. The test results show that when the magnetic field strength is adjusted from 240kA/m to 400kAAn, the iron concentrate grade decreases from 43.05%. It is 40.13%, and its recovery rate has risen sharply from 29.81% to 57.45%. In order to maximize the comprehensive recovery of resources, the magnetic field magnetic induction intensity is 400kA/m. Table 5 Selected magnetic field magnetic induction test results 2, selected flushing water test Featured flushing water test results: When the wash water were 0.36m 3 /h,0.72m 3 / h and 1.08m 3 / h, the resulting iron grade of the iron ore 40.13%, 42.49% and 44.20%, respectively, the corresponding The iron recovery rates were 57.45%, 43.02% and 36.98%, respectively. Considering comprehensively, it is advisable to use 1.08m 3 /11 of flushing water. At this time, iron grade 44.20% and iron recovery rate of 36.98% iron concentrate can be obtained. (III) Necessity test for re-grinding of strong magnetic coarse concentrate In order to investigate the effect of re-grinding of strong magnetic coarse concentrate on improving iron index, a regrind test was carried out. The test flow is shown in the figure. 1. The strong magnetic field strength is 1008kA/m, the ore feeding speed is 192kg/h, the ore concentration is 40%, the flushing water is 0.36m3/h, and the strong magnetic disk speed is 4r/min. The tooth gap is 5 mm. The magnetic induction intensity of the strong magnetic selection magnetic field is 400kA/m, the flushing water is 1.08m3/h, and the results of the re-grinding test of the strong magnetic coarse concentrate are shown in Table 6. Table 6 Re-grinding test results The results show that, with proper fine grinding, although the iron grade and iron recovery rate of iron concentrate are improved to some extent, the increase is not large. Considering the cost factor, it is better to no longer grind. Fourth, the conclusion 1. It is feasible to use the Shp wet magnetic separator to recover the siderite. At the same time, the iron ore concentrate with 44.20% iron grade can be obtained through a coarse and fine sorting process, and the iron recovery rate can reach 29.91%. 2. Using Shp strong magnetic machine, it can effectively recover 70,000 tons of siderite every year, solve some raw materials sources in the national recycling economy iron pellets project, and create economic benefits of more than 10 million yuan, which has opened up new opportunities for the production and operation of enterprises. The channel, while reducing the pressure on the tailings inventory. Leisuwash EG Vehicle Wash Disinfectant Equipment Vehicle Wash Disinfect Equipment,Touchless Car Wash,Touchless Vehicle Wash Disinfect Equipment,Leisuwash Vehicle Wash Disinfect Equipment Hangzhou Leisu Cleaning Equipment Co.,Ltd , https://www.sdleisuwashtouchless.com