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由于我厂处理的出窿原矿品位逐年下降,提高锑精矿品位比较困难,影响了冶炼厂的生产。为此,我们采取了几项技术措施,提高锑精矿品位,使其达到本厂历史最好水平。原矿产于低温热液充填似层状锑矿床。金属矿物有辉锑矿、黄锑华、锑华、黄铁矿、褐铁矿等。脉石矿物有石英、方解石、高岭土、石膏和重晶石等。辉锑矿呈不均匀嵌布,1毫米以上者占95.8%。原矿含锑3.67%,矿物概量如表1。矿石破碎后筛分成三个级别。+35毫米粒级用手选处理,得低品位块精矿(送冶炼处理)和废石;-35+10毫米粒级经重介质预选丢弃部分废石后,入破碎机细碎并与-10毫米粒级合并进粉矿仓。磨矿为一段闭路,磨矿细度-200目占55～60%。浮选流程为一粗二精二扫加尾矿再选流程。药剂用量(克/吨)为丁黄药350、硝酸铅150、松醇油110、页岩油350和煤油50。提高锑精矿品位的措施是:1.把部分品位较低的手选块精矿破碎后送磨浮工段处理,而不直接送冶炼厂。2.严格控制起泡剂用量,提高煤油用量。
Due to the declining raw ore grade handled by our factory, it is difficult to improve the grade of antimony concentrate, affecting the smelter’s production. To this end, we have taken several technical measures to improve the antimony concentrate grade, so that it reached the factory the best level in history. The ore is produced in the low-temperature hydrothermal charge-like layered antimony deposit. Metallic minerals are stibnite, antimony yellow, antimony, pyrite, limonite and so on. Gangue minerals are quartz, calcite, kaolin, gypsum and barite. Stibnite was uneven embedded, more than 1 mm accounted for 95.8%. Raw ore containing antimony 3.67%, the amount of minerals in Table 1. Crushed ore is divided into three levels. +35 mm particle size hand-selected processing, low-grade block concentrate (sent smelting treatment) and waste rock; -35 +10 mm particle size heavy medium preselected discarded part of the waste rock, broken into crusher and with -10 Mm grain size into the powder ore warehouse. Grinding for a closed circuit, grinding fineness -200 mesh accounted for 55 to 60%. Flotation process for a rough two fine two sweep tailings re-election process. The dosage of the drug (g / t) was butyric 350, lead nitrate 150, pine spirit 110, shale oil 350 and kerosene 50. Antimony concentrate to improve the level of measures are: 1. The handkerchief part of the lower quality concentrate crushed sent to the grinding section, rather than directly to the smelter. 2. Strict control of the amount of foaming agent, increase the amount of kerosene.