(1) White tungsten flotation regulator
The rough selection of scheelite ore is mostly carried out by adjusting the slurry in a weakly alkaline medium (pH=8.5~10.0) and then using a fatty acid collector. In order to improve the selectivity of flotation, a suitable regulator must be added before flotation. Usually, the combination of regulators is water glass-sodium hydroxide, water glass-sodium carbonate, water glass-sodium hydroxide-sodium carbonate, lime-water. Glass - sodium carbonate, lime - water glass, and the like. Adding the polyvalent metal cations such as Al3 +, Cr3 +, Mg2 + , Cu2 +, Zn2 +, Pb2 + and other metal salts may be selected to improve the suppression performance waterglass. Some people have also used combination inhibitors. For example, Yang Yaohui and others have adopted a highly effective combination inhibitor D1, which can strengthen the inhibition of calcium-bearing gangue minerals such as fluorite and calcite . Guo Haining and others use self-developed scheelite flotation. Highly effective adjuster TY-19.
(2) White tungsten flotation collector
The scheelite collector can be divided into an anion collector, a cation collector, an amphoteric collector, and a non-polar collector, among which an anion collector is most commonly used. Anionic collectors mainly include fatty acids and chelating collectors. Fatty acid collectors such as oleic acid, sodium oleate, tart oil, tal oil soap, naphthenic acid, naphthenic acid soap, cottonseed oil soap, etc. have strong ability to capture, but have poor selectivity; Paraffin soap (731) has a weak ability to capture and has low selectivity. The above agents have poor solubility at low temperatures, and the effect on flotation of low-grade and symbiotic complex ore is poor.
In response to these problems, in recent years, the Guangzhou Institute of Nonferrous Metals and the Beijing Research Institute of Mining and Metallurgy and other research institutes have developed a special effect of white tungsten high-efficiency collector.
Guangzhou Nonferrous Metal Research Institute has developed GY series (including ZL, TA-3, TAB-3, GYW, FW, etc.) scheelite high-efficiency selective collector, which is modified by different methods for fatty acid collectors. It is compounded with a combination of collector and emulsifier. It is widely used in combination with the advantages of fatty acid collectors and chelating collectors in terms of harvesting capacity and selectivity and solubility. More than ten mines in China have been successfully applied, such as Hunan Persimmon Garden, Gansu Xiaoliugou, Jiangxi Xiushui Xianglushan, Hunan Linwu Dongshan Mining Company, Hunan Huangshaping Molybdenum -tungsten ore and other more than ten polymetallic scheelites. application. Zhou Xiaotong et al. used TA to compare the arsenic- rich 0.37% WO3 scheelite in Hunan ore. Compared with the conventional collector 731, the recovery rate of scheelite concentrate increased by 8.41% in the case of equivalent concentrate grade. Reduced by 1/3, and the cost of the drug is less. Zeng Qingjun and other ZL collectors were used for flotation. For a scheelite ore containing 0.58% WO3, the industrial test obtained 66.82% of tungsten concentrate with a recovery rate of 90.98%. Under the same industrial test conditions, the grade and recovery of tungsten concentrate obtained by using 731 collector were 3.87 % and 8.93% higher, respectively. Zhou Xiaotong et al. used TAB-3 to float a certain white tungsten containing 0.33% WO3 to obtain a white tungsten concentrate with a grade of 72.59% WO3 and a recovery rate of 70.645%. Gao Yude used the self-developed scheelite collector FW-2 to obtain a tungsten concentrate of 0.73% of WO3 and WO3 recovery rate of 89.48% of the scheelite ore of 0.73% WO3. Deng Lihong et al. used TA-3 flotation scheelite to obtain a white tungsten concentrate containing 67.92% WO3 for a strontium zinc iron flotation tailing with a grade of 0.12% WO3. The recovery rate was 65.76%.
Beijing Mining and Metallurgical Research Institute developed BK series white tungsten collector. Ye Yuehua et al. adopted the BKYF collector newly developed by Beijing Research Institute of Mining and Metallurgy. For the lower grade ore containing 0.19% WO3, the tungsten concentrate contained 62.58% WO3, and the recovery rate was 70.73%. Liu Shujie used the collector BK418 to obtain 0.21% WO3 ore. The closed-circuit test obtained 61.79% tungsten concentrate of WO3 grade, and the recovery rate of WO3 was 74.30%.
Cao Xuefeng et al. used OXB as a collector to obtain a scheelite containing WO30.70% in a certain area of ​​Jiangxi. The closed-loop flotation process test obtained a 60.42% scheelite concentrate containing WO3, and the recovery rate was 81.56%. Compared with 731 as a collector, the recovery rate is increased by 5.28% on the premise of ensuring the concentrate grade.
Zhou Xinmin et al. used sodium carbonate, water glass regulator, CF-05 as a collector, and a 0.18% scheelite ore of a grade WO3 in Henan, which obtained a white grade of 52.15% and a recovery of 70.53%. Tungsten concentrate.
In terms of cation collectors, Yang Fan et al used flotation of tartaric ore with 733 and benzoxamic acid as collectors, and then vigorously stirred white tungsten coarse concentrate under acidified water glass. A blank selection is then made, followed by a quaternary ammonium collector for a selection. Using didecyldimethylammonium chloride (DDAC) as the collector, the index of concentrate WO3 grade 51.02% and recovery rate 54.65% was obtained; trioctylmethylammonium chloride (TOAC) was collected. The agent obtained 52.01% of the concentrate WO3 grade and the recovery rate was 51.54%. TOAC's sorting efficiency is slightly better than DDAC. At the same time, comparison with two blank selections showed that the quaternary ammonium collector significantly improved the sorting efficiency of the selected scheelite and calcite.
In addition, the combined use of collectors is also a major research direction for scheelite flotation agents. Beijing Research Institute of Mining and Metallurgy uses chelating agent CF and modified fatty acid collector OS-2. It has 0.43% WO3 of Heilongjiang Shuangyashan Jianlong scheelite in the original ore. The grade of scheelite concentrate is 66.94% and the recovery rate of WO3 is 83.11%. . Guangzhou Nonferrous Metals Research Institute adopts chelation collector GYN and auxiliary collector GYE which have good selective collection effect on tungsten flotation, and obtains WO345.20% and WO3 recovery rate for raw ore containing WO31.47%. Up to 89.58% of tungsten concentrate. Guo Yuwu, Hunan Institute of Nonferrous Metals, used 731 oxidized paraffin soap + YK as a collector to obtain a tungsten concentrate with a WO3 grade of 62.29% and a recovery rate of 74.21%. Bai Ding et al. mixed MES (fatty acid isocyanurate) with 733, and the ability to resist hard water was greatly improved when used alone. Li Jing and other use of the new combination of collector ZL-B + LDZ, also greatly improved the tungsten concentrate grade and recovery.
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