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The inhibitor BK510 is a liquid that is easily dispersed in water, has good low-temperature fluidity, and has low viscosity. Compared with sodium sulfide, a commonly used molybdenum inhibitor, it has the characteristics of small dosage, good selectivity and strong inhibition ability. BK510 employed as an inhibitor, as kerosene collector is selected from a molybdenum ore flotation recovery obtained ideal metallurgical performance.
First, the nature of the ore
(1) Analysis of main chemical components of ore and phase analysis
The main chemical composition analysis results of the ore are shown in Table 1, and the molybdenum phase analysis results are shown in Table 2.
Table 1 Analysis results of main chemical components of ore
chemical composition | Mo | Cu | Pb | Zn | Fe | S | P | C | SiO 2 |
Quality score | 0.11 | 0.034 | 0.034 | 0.027 | 2.71 | 0.98 | 0.042 | 0.73 | 68.07 |
chemical composition | Al 2 O 3 | CaO | MgO | K 2 O | Na 2 O | Au | Ag | Re | |
Quality score | 13.28 | 2.22 | 2.17 | 6.30 | 0.75 | 0.13g/t | 6.46g/t | 0.00008 |
Table 2 % of ore molybdenum phase analysis results
Different | Molybdenum | Molybdenum oxide | Total mo |
Quality score Distribution rate | 0.108 97.30 | 0.002 3.70 | 0.11 100.0 |
(2) Mineral composition
The main metallic ore minerals are molybdenite, pyrite, yellow copper ore, galena, sphalerite, pyrrhotite, and small amounts of magnetite and hematite; gangue minerals are quartz, feldspar, mica, dolomite, followed calcite, barite, rutile, apatite and the like.
(3) Embedding characteristics of main metal minerals in ore
The molybdenum ore in the ore is mainly in the form of a slab-like aggregate that is unevenly embedded in the gangue or near-vein cleft, except for a part of the coarse-grained aggregate and the fine-grained single crystal embedded in the gangue mineral, most of the molybdenum The medium-in-fine-grain-like aggregate is embedded in the gangue, and the molybdenum ore is well crystallized. The maximum width of the molybdenite aggregate is 0.5mm, and the width of most molybdenum ore is 0.010~0.2mm. There is also a small amount of molybdenite with a width of fine particles (-0.010mm) embedded in the gangue mineral. Only fine grinding of fine molybdenum ore can fully dissociate the monomer, which is the main factor affecting the recovery rate of molybdenum beneficiation.
Except for molybdenite, the other sulfides in the ore are mainly pyrite, and the relative content of minerals is 1.80%. Pyrite is mostly semi-automorphic, fine-grained, medium-grained and embedded in gangue minerals. The maximum particle size of pyrite is 0.8mm, most of which is between 0.020 and 0.35mm. In addition to symbiotic with chalcopyrite and sphalerite, pyrite is often embedded in gangue minerals in irregular coarse grains.
Second, mineral processing test research
(1) Grinding fineness test
The grinding fineness test was carried out under the conditions of coarsely selecting water glass dosage of 500 g/t, kerosene dosage of 60 g/t, and BK204 dosage of 25 g/t. The test results are shown in Fig. 1. The test results show that with the increase of grinding fineness, the molybdenum grade of molybdenum coarse concentrate gradually decreases, and the recovery rate of molybdenum gradually increases. Considering comprehensively, the grinding fineness is selected to be -74μm 65% for subsequent tests.
(2) Water glass dosage test
The water glass dosage test was carried out under the conditions of grinding fineness -74μm, 65%, coarse kerosene dosage 60g/t, and BK204 dosage 25g/t. The test results are shown in Fig. 2. The test results show that when the amount of water glass is 500g/t, the molybdenum grade and recovery rate of molybdenum coarse concentrate are ideal. Therefore, the amount of the molybdenum crude water glass is preferably 500 g/t.
(3) Kerosene dosage test
The kerosene dosage test was carried out under the conditions of grinding fineness -74 μm, 65%, coarse selection of water glass, 500 g/t, and BK204 dosage, 25 g/t. The test results are shown in Fig. 3. The test results show that when the amount of kerosene is 60g/t, the effect is ideal. Therefore, the kerosene dosage was 60g/t for subsequent tests.
(4) Molybdenum selective regrind test
After coarse selection of the coarse concentrate, after two selections, the regrind fineness test was carried out under the conditions of water glass dosage of 100 g/t, BK510 60 g/t, and kerosene 5 g/t. The test results are shown in Fig. 4. The test results show that as the regrind fineness increases and the molybdenum grade of molybdenum coarse concentrate increases gradually, the molybdenum recovery rate decreases gradually. For comprehensive consideration, the re-grinding fineness was selected to be -45μm 90% for subsequent tests.
(5) Molybdenum selected water glass dosage test
After coarse selection of the coarse concentrate after two selections, the water glass dosage test was carried out under the conditions of regrind fineness of -45 μm of 90%, BK510 60 g/t, and kerosene 5 g/t. The test results are shown in Fig. 5. The test results show that when the amount of water glass is 100g/t, the molybdenum grade and recovery rate in molybdenum concentrate are ideal. Therefore, the amount of molybdenum-selected water glass is preferably 100 g/t.
(6) Molybdenum selection BK510 dosage test
After coarse selection of the coarse concentrate after two selections, the BK510 dosage test was carried out under the conditions of regrind fineness of -45 μm of 90%, water glass dosage of 100 g/t, and kerosene 5 g/t. The test results are shown in Fig. 6. The test results show that when the amount of BK510 is 30g/t, the molybdenum grade and recovery rate of molybdenum concentrate are ideal. Therefore, the amount of molybdenum-selective BK510 is preferably 30 g/t.
(7) Closed circuit test
The small closed circuit test process is shown in Figure 7, and the test results are shown in Table 3.
Table 3 % of closed circuit test results
product name | Yield | grade | Recovery rate |
Molybdenum concentrate Tailings Raw ore | 0.19 99.81 100.0 | 51.07 0.01 0.11 | 89.09 10.91 100.0 |
Third, the conclusion
(1) The main metal mineral in the test ore sample is molybdenum ore, in which the molybdenum content is 0.11%, 97.30% of the molybdenum exists in the form of molybdenum sulfide; the contents of other associated symbiotic copper, lead, zinc and other elements are relatively low, mainly There are pyrite, chalcopyrite, galena, sphalerite, pyrrhotite, magnetite and a small amount of minerals such as hematite; gangue minerals are mainly quartz, feldspar, mica and dolomite.
(II) In this study, BK510 was used as an inhibitor and kerosene was used as a collector. The molybdenum concentrate containing molybdenum was obtained by one rough selection, two sweeps, two stages of coarse refining, and seven selected processes. 51.07%, the molybdenum recovery rate of 89.09% of the flotation index.
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