Dexing copper ore beneficiation plant using conventional sizhoutou copper xanthate sulfur and then grinding and re floating mixing process used is butyl xanthate collector strong copper sulfur flotation collector, Dante lack of selectivity xanthate, copper Sulphur separation requires a high alkaline medium (on-site slurry pH > 13). This not only consumes a lot of lime, increases the production cost, but also inhibits the uplift of a small amount of copper sulfide ore while suppressing pyrite . Especially important is that the high alkali medium is very unfavorable to some secondary copper sulfide minerals in the copper sulfide ore. , copper oxide minerals, gold minerals, associated gold and molybdenum ore flotation, resulting in the loss of copper, gold, molybdenum in the separation of copper and sulfur. In order to comprehensively recover copper, gold, molybdenum and other metal elements in Dexing copper ore, reduce the amount of lime separated by two-stage copper-sulfur flotation, research on floculation at the Pazhou Concentrator from the new high-efficiency copper sulfide ore collector The experimental study is to improve the comprehensive recovery rate of copper, gold and molybdenum in Dexing copper ore.
First, the nature of the sample and test methods
(1) Mineral properties
Dexing Copper Mine is a very large porphyry copper deposit, and the ore type is mainly fine vein-disseminated sulfide ore. The copper minerals in the ore are mainly chalcopyrite, followed by chalcopyrite, Lanhui copper deposit, copper blue, beryllium copper ore, arsenic antimony ore, etc., and a small amount of malachite and porphyrite. Metal sulfide is mainly pyrite, followed by a very small amount of pyrrhotite. The independent mineral of molybdenum is molybdenum ore, gold is mainly found in natural gold, followed by silver- gold ore. Gangue minerals are quartz, sericite, chlorite, water muscovite, illite, biotite.
(2) Test methods
The test ore sample is the on-site overflow sample of the Pazhou plant, and its grinding fineness is -0.074mm65%, and the slurry concentration is 30%. The test adopts 31XFD-63 single-tank flotation machine, which is divided into 11XFD-63 single-slot flotation machine and 0.51XFD-63 single-slot flotation machine for concentrate. The closed-circuit process tests two rough-selective flotation foams to select and select to ensure the selected concentration. The process is the on-site production process, as shown in Figure 1.
Figure 1 Closed-circuit test procedure for the mixing and floating process of the Dezhou Copper Mine
For the flotation collectors used in the test, in addition to conventional agents such as diced yellow lycopene and butyl ammonium black medicinal agents, the new collectors used are shown in Table 1, which are all industrial grades. The foaming agent used in the test was 111 # , which is a petroleum by -product. The industrial test ore is mainly from the Xiyuanling mining area in the Beishan of the Tongchang. It is carried out in the first phase of the Weizhou Concentrator. The grinding section of the 8000t processing capacity is the test system, and the grinding section of the daily processing capacity of 10000t is the comparison system.
Table 1 New collector code and its main components
Collector code | Z-200 | MPS | MPC | MAP | TU-32 | TU-34 | TU-82 |
Main composition | Thiocarbamate | Allyl Thiocarbamate | modified Thiocarbamate | Monothio Phosphate | modified Thiourea | modified Thiourea | modified Thiourea |
Second, the test results and discussion
(1) Different types of collector flotation tests
The test procedure for different types of new collector flotation overflow samples is shown in Figure 2. The test results are shown in Table 2. The test results show that the modified thiourea collectors TU-32 and TU-34 have better copper capture ability than the monothiophosphate collector MAP thiourethane collectors Z-200, MPS and MPC. .
Figure 2 Open circuit test procedure for a new collector flotation overflow sample
Table 2 Extreme results of new collector flotation test conditions
Pharmacy conditions / (g / t) | product | Yield(%) | grade/% | Recovery rate/% | ||
Cu | S | Cu | S | |||
Rough selection: TU-32 20, Ding Huang 20 Sweep one: Ding Huang 10,111 # 5 | Coarse concentrate Middle mine Tailings Raw ore | 8.83 1.53 89.64 100.00 | 4.30 0.71 0.04 0.43 | 19.02 8.98 0.13 1.93 | 98.05 2.53 8.41 100.00 | 86.85 7.12 6.03 100.00 |
Rough selection: TU-34 20, Ding Huang 20 Sweep one: Ding Huang 10,111 # 5 | Coarse concentrate Middle mine Tailings Raw ore | 8.42 1.51 90.08 100.00 | 4.56 0.79 0.03 0.43 | 20.42 6.66 0.10 1.91 | 89.63 2.79 7.57 100.00 | 89.94 5.25 4.81 100.00 |
Rough selection: TU-200 20, Ding Huang 20 Sweep one: Ding Huang 10,111 # 5 | Coarse concentrate Middle mine Tailings Raw ore | 8.05 1.68 90.27 100.00 | 4.58 0.93 0.04 0.43 | 20.53 9.87 0.14 1.95 | 86.41 3.65 9.94 100.00 | 84.89 8.48 6.63 100.00 |
Rough selection: MPS, Ding Huang 20 Sweep one: Ding Huang 10,111 # 5 | Coarse concentrate Middle mine Tailings Raw ore | 8.12 1.80 90.07 100.00 | 4.63 0.87 0.04 0.43 | 20.72 10.25 0.16 2.01 | 87.36 3.64 9.00 100.00 | 83.83 9.22 6.96 100.00 |
Rough selection: MPC 20, Ding Huang 20 Sweep one: Ding Huang 10,111 # 5 | Coarse concentrate Middle mine Tailings Raw ore | 8.37 1.48 90.15 100.00 | 4.54 0.85 0.04 0.43 | 19.44 11.78 0.11 1.89 | 88.47 2.93 8.60 100.00 | 85.83 9.18 4.99 100.00 |
Rough selection: MAP 20, Ding Huang 20 Sweep one: Ding Huang 10,111 # 5 | Coarse concentrate Middle mine Tailings Raw ore | 9.31 1.54 91.15 100.00 | 5.02 1.01 0.05 0.43 | 21.28 13.57 0.18 1.93 | 86.08 3.65 10.27 100.00 | 80.58 10.83 8.60 100.00 |
(II) TU series collector flotation test
The results in Table 2 indicate that the modified thiourea collector is a strong collector of copper in the German copper ore. To this end, the TU series collector flotation test was carried out. The test procedure is shown in Figure 2. The test conditions and results are shown in Table 3. The results show that with the increase of the substituent carbon chain, the ability of TU series collector to capture copper first increased and then decreased. The capture capacity of the four carbon TU-34 is stronger than that of the two carbon TU-32, but the capture capacity of the eight carbon TU-82 is significantly reduced, probably due to the significant decrease in solubility. And the combination of TU-34 or TU-32 with a small amount of Dinghuang can achieve better copper recovery than the single collector Dinghuang. Since the raw material cost of TU-34 is nearly 8,000 yuan/t more expensive than TU-32, considering the cost performance of the drug, TU-32 is selected for further experimental research.
Table 3 TU series collector flotation test conditions and results
Pharmacy conditions / (g / t) | product | Yield(%) | grade/% | Recovery rate/% | ||
Cu | S | Cu | S | |||
Rough selection: Ding Huang 50,111 # 20 Sweep one: Ding Huang 20,111 # 10 | Coarse concentrate Middle mine Tailings Raw ore | 5.55 1.30 93.15 100.00 | 6.56 1.11 0.04 0.42 | 19.3 7.27 0.05 1.22 | 87.57 3.47 8.96 100.00 | 88.16 7.78 4.06 100.00 |
Rough selection: TU-32 20, Ding Huang 10, 111 # 5 Sweep one: Ding Huang 10,111 # 5 | Coarse concentrate Middle mine Tailings Raw ore | 6.35 1.72 91.93 100.00 | 5.83 0.82 0.04 0.42 | 19.23 4.02 0.09 1.37 | 88.30 3.36 8.33 100.00 | 88.88 5.03 6.09 100.00 |
Rough selection: TU-34 20, Ding Huang 10, 111 # 5 Sweep one: Ding Huang 10,111 # 5 | Coarse concentrate Middle mine Tailings Raw ore | 6.40 1.47 92.13 100.00 | 5.95 0.68 0.03 0.42 | 18.98 4.49 0.06 1.33 | 90.62 2.37 7.01 100.00 | 91.18 4.95 3.87 100.00 |
Rough selection: TU-82 20, Ding Huang 10, 111 # 5 Sweep one: Ding Huang 10,111 # 5 | Coarse concentrate Middle mine Tailings Raw ore | 3.80 1.25 94.95 100.00 | 8.61 2.30 0.06 0.42 | 24.81 18.16 0.15 1.31 | 79.24 6.96 13.80 100.00 | 71.95 17.32 10.72 100.00 |
(C) TU-32+ a small amount of xanthate a closed circuit test
On the basis of the collector condition test, a section of flotation closed-circuit test comparing the different combinations of TU-32 collector and Dinghuang was carried out. The test procedure is shown in Figure 3 and the results are shown in Table 4. The results of closed-circuit comparison test showed that TU-32 was combined with a small amount of Dinghuang medicine, and the recovery rate of one-stage flotation copper was 1.46% higher than that of yellow medicine flotation. It is worth noting that when the crude selection is only TU-32, and the xanthate is added to the sweeping operation, the recovery rate of sulfur in the coarse concentrate can be significantly reduced, only 74.96%, indicating that the TU-32 collector has Good selectivity.
Figure 3 TU-32 collector + a small amount of butyl yellow drug a flotation closed circuit test process
Table 4 Closed-circuit flotation test results of TU-32 collector and xanthate combination
Pharmacy conditions / (g / t) | product | Yield(%) | grade/% | Recovery rate/% | ||
Cu | S | Cu | S | |||
Rough selection: TU-32 20, Ding Huang 10 Sweep one: Ding Huang 10 | Coarse concentrate Tailings Raw ore | 8.74 91.26 100.00 | 4.84 0.03 0.45 | 18.7 0.22 1.83 | 93.36 6.64 100.00 | 89.20 10.80 100.00 |
Rough selection: TU-32 20, Sweep one: TU-32 4, Ding Huang 20 | Coarse concentrate Tailings Raw ore | 7.48 92.52 100.00 | 5.36 0.03 0.43 | 18.97 0.51 1.89 | 92.72 7.28 100.00 | 74.96 25.04 100.00 |
Rough selection: Ding Huang 50, 111 # 20 Sweep one: Ding Huang 20, 111 # 5 | Coarse concentrate Tailings Raw ore | 7.00 93.00 100.00 | 5.73 0.04 0.44 | 23.48 0.16 1.79 | 91.90 8.10 100.00 | 91.79 8.21 100.00 |
(D) TU-32+ small amount of Dinghuang medicine full-process closed-circuit test
The previous flotation test results show that the combination of TU-32 and Dinghuang can achieve a better copper recovery rate than a collector Dinghuang, and the selectivity of TU-32 collector is better than that of Dinghuang. To this end, the whole process closed-circuit comparison test of TU-32+ small amount of Dinghuang drug combination collector and single Dinghuang drug collector was carried out. The test ore sample is a comprehensive sample for production. It contains 0.42% copper, 1.72% sulfur, 0.01% molybdenum, 0.18g/t gold, and 1.18g/t silver. The test procedure is shown in Figure 1. The test conditions are shown in Table 5. The test results are shown in Table 6. It shows that the combination of TU-32+ small amount of Dinghuang can significantly reduce the amount of separated copper and sulfur in the second stage, and obtain the copper concentrate grade of 24.22%, copper recovery rate of 88.06%, gold recovery rate of 55.40%, molybdenum recovery rate of 61.78%, silver. The recovery rate is 60.97% of the flotation index. Compared with the xanthate process, the copper recovery rate increased by 0.95%, the gold recovery rate increased by 4.31%, and the molybdenum recovery rate increased by 2.82%.
Table 5 Full-process closed-circuit test pharmaceutical conditions
Process | Ding Huang Yao | TU-32+ small amount of butyl yellow drug | |
one segment | Rough selection Sweep one Sweep | Ding Huang Yao 50,111#20 Ding Huang Yao 10,111#5 Ding Huang Yao 10,111#5 | TU-32 20, Ding Huang Yao 10,111#5 Ding Huang Yao 10,111#5 Ding Huang Yao 10,111#5 |
two segment | sorting Featured one Featured 2 | Lime 600, GTP 20 Lime 300, GTP 10 Lime 300 | Lime 400 Lime 200 Lime 100 |
Table 6 Full-process closed-circuit flotation test results
Process name | Product name | Yield/% | grade/% | Recovery rate/% | ||||||||
Cu | S | Mo | Au | Ag | Cu | S | Mo | Au | Ag | |||
Single diced yellow drug | Copper concentrate Tailings I Tailings II Raw ore | 1.54 5.56 92.90 100.00 | 23.28 0.20 0.04 0.42 | 32.04 16.83 0.26 1.72 | 0.44 0.04 0.01 0.01 | 5.99 0.52 0.06 0.18 | 48.80 4.01 0.22 1.18 | 87.11 2.73 10.16 100.00 | 26.60 56.13 14.27 100.00 | 58.96 18.66 22.38 100.00 | 51.09 15.98 32.93 100.00 | 63.50 18.84 17.66 100.00 |
TU-32 + small amount Ding Huang Yao | Copper concentrate Tailings I Tailings II Raw ore | 1.51 6.45 92.04 100.00 | 24.22 0.18 0.04 0.42 | 33.54 15.87 0.20 1.72 | 0.48 0.03 0.01 0.01 | 6.64 0.48 0.05 0.18 | 47.60 3.78 0.23 1.18 | 88.06 2.86 9.09 100.00 | 29.50 59.62 10.88 100.00 | 61.78 17.34 20.88 100.00 | 55.40 17.14 27.46 100.00 | 60.97 20.68 18.35 100.00 |
(5) TU-32+ small amount of xanthate industry test
Based on the above test results, the industrial test of a new type of TU-32+ small amount of Dinghuang was carried out in the Grinding System of Dexing Copper Mine, and the experimental process is shown in Figure 1. The test chemicals are shown in Table 5, 29d for a total of 85 classes of industry. The test indicators are shown in Table 7. The results of industrial tests show that compared with the traditional xanthate process of the second mill system, the TU-32+ small amount of butyl yellow medicinal technology significantly reduces the amount of copper separated from the second stage of copper and sulfur, and can improve various mineral processing indexes of copper concentrate, wherein the copper grade is increased by 0.93. %, copper recovery rate increased by 1.05%; gold grade increased by 1.29% g/t, gold recovery rate increased by 7.16%; molybdenum grade increased by 0.03%, and molybdenum recovery rate increased by 3.90%. After the industrial test, the TU-32+ small amount of Dinghuang medicine process was immediately applied in the Dezhou Copper Mine Concentrator.
Table 7 Statistical results of TU-32+ small amount of Dinghuang drug industry test
system | Product name | Processing capacity / t | grade/% | Comprehensive recovery rate /% | ||||||
Cu | Au | Ag | Mo | Cu | Au | Ag | Mo | |||
Grinding a section | Copper concentrate Raw ore | 3372.3 233272 | 23.16 0.44 | 12.10 0.27 | 52.48 1.22 | 0.16 0.01 | 75.64 100.00 | 65.18 100.00 | 62.16 100.00 | 37.05 100.00 |
Grinding two sections | Copper concentrate Raw ore | 4369.6 294081 | 22.23 0.44 | 10.81 0.28 | 49.11 1.15 | 0.13 0.01 | 74.59 100.00 | 58.02 100.00 | 63.33 100.00 | 33.15 100.00 |
Third, the conclusion
(1) Different types of new collectors flotation Dexing copper ore results show that the modified thiourea collector is a strong collector of copper minerals, and its recovery of copper is better than that of monothiophosphorus ester. Collector and thiamine collector. As the substituent carbon chain grows, the ability of the thiourea series collector to capture copper first increases and then decreases. The capture capacity of the four carbon TU-34 is stronger than that of the two carbon TU-32, but the capture capacity of the eight carbon TU-82 is significantly reduced.
(II) Industrial test results, compared with the traditional xanthate process, the TU-32+ small amount of butyl yellow drug process significantly reduces the amount of copper separated from the second stage of copper and sulfur, and can improve various mineral processing indexes of copper concentrate, wherein the copper grade is increased by 0.93%. The copper recovery rate increased by 1.03%; the gold grade increased by 1.29g/t, the gold recovery rate increased by 7.16%; the molybdenum grade increased by 0.03%, and the molybdenum recovery rate increased by 3.90%. The modified thiourea collector has strong trapping ability for copper minerals and good selectivity for iron sulfide minerals.
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