"Thiourethane" collectors are sulfide ores, which is characterized by selective, less medication, particularly for collecting capability pyrite very weak flotation of ores containing brass and pyrite ore Copper is very effective, and zinc- sulfur separation also has a good effect.
1. When using the "thiourethane" type collector to select Cu, Zn, and S type ruthenium as a laughing substance (but) butyl thiourethane floating Cu, Zn, S ore, with the increase of the pulp pH value, yellow iron The recovery rate of the mine dropped sharply, while the recovery of copper and zinc remained unchanged over a wide pH range, and the grade increased. The results are shown in Figure 1.
(The picture is not available)
Figure 1 Relationship between copper, zinc, sulfur recovery and grade and pH
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It can be seen from Fig. 1 that at pH=10~10.5, better results can be obtained by preferentially flotation of copper from sulfur with "thiourethane" type collector or by preferential flotation of zinc from sulfur. .
2. At lower pH, using (isopropyl) ethionyl ester as a collector can also separate zinc and sulfur. According to the literature, some countries use (isopropyl) ethionate as a collector. At lower pH conditions, zinc and sulfur can also be separated. The test results are shown in Table 1.
Comparison of preferential flotation of sphalerite from pyrite with (isopropyl) ethionamide and isopropyl xanthate :
Preferred flotation sphalerite comparison test   Table 1
Collector name and Dosage (g / ton) | Tailings PH value | Zinc concentrate | Note | ||||
grade(%) | Recovery rate(%) | ※ indicates added Stone ash Each test was added with copper sulfate 130 g / ton | |||||
(isopropyl) Ethyl carbamate | Isopropyl xanthate | 7.0 7.4 9.9 | Zn | Fe | Zn | Fe | |
9.0 | 13.6 13.6 | 50.0 29.2 41.2 | 3.1 13.2 8.9 | 87.0 84.6 84.3 | 5.9 43.9 20.6 | ||
From the data in Table 1, the (isopropyl) ethionamide has a weak ability to capture pyrite, and its selectivity is stronger than that of isopropyl xanthate. Therefore, (isopropyl) ethionamide is a better harvest. Agent.
Article 3 of the Liaoning Institute of the non-ferrous metallurgical and other units with sub-Division (isopropyl) ethyl urethane of Hujiayu sulfur mine to do a more in-depth research, and industrial test done, mainly copper mine minerals Chalcopyrite, the main cobalt- containing mineral is a copper-cobalt ore of pyrite (like the same type). They first use (isopropyl) ethionyl ester to preferentially float copper, and copper tailings are selected by the principle flow of xanthate floating cobalt pyrite. The third stage industrial test results and industrial test chemical conditions are shown in Table 2 and Table. 3.
From Tables 2 and 3, the (isopropyl) ethionyl ester chalcopyrite flotation has good selectivity, and the ability to collect pyrite is less than that of xanthate. Therefore, the use of (isopropyl) ethionamide float copper, followed by xanthate float cobalt pyrite, can reduce the content of cobalt in copper concentrate, improve the index of cobalt concentrate. (Isopropyl) acetaminophen is used in a small amount, which is 1/4 of the butyl sulphate, the amount of lime is reduced by half, and the recovery rate is increased by about 14%.
Industrial test conditions Table 2
Test date | Copper selection system | Cobalt selection system | ||||
lime | Ding Huang Yao | (isopropyl) ethionamide | Pyridine | Ding Huang Yao | Pyridine | |
July 14-16 July 17-20 | 7500 2690 | 65 - | - 15.35 | 95 64.16 | 250 180 | 220 240 |
Industrial test results Table 3
Pharmacy | Test date | Processing capacity (Ton) | Copper selection index | Cobalt index | ||||||
Raw ore grade (%) | Concentrate grade (%) | Recovery rate(%) | Concentrate grade (%) | Recovery rate(%) | ||||||
Cu | Co | Cu | Co | Cu | Co | Co | Co | |||
Yellow medicine (isopropyl) Ethylthiourethane | July 14-16 July 17-20 | 764 585 | 0.711 0.577 | 0.026 0.025 | 18.989 18.735 | 0.113 0.064 | 95.76 96.17 | 15.42 7.58 | 0.288 0.252 | 56.22 70.34 |
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