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嵌布粒度很细的锡石,或属矿石内所固有,或在选矿过程中因磨剥泥化而成,使锡的选矿发生大量的金属损失。在水力和机械分级机内,在摇床上,在跳汰机和其他重选设备内,细粒锡石易于飘浮在矿浆表面,往往无可挽回地随溢流而损失。选矿过程锡的总损失中,有70％与此相关。浮选是提高这类锡石回收率的最有效的方法。就各种类型锡矿石的重选矿泥,列举了细粒锡石浮选的工艺流程。这些矿石高含电气石或绿泥石,氧化铁或硫化铜、硫化铁等,以及黄玉、萤石、方解石等。根据矿石物质成分的复杂程度,推荐了锡石浮选药剂制度或捕收剂类型(脂肪酸、烷基磷酸、羟肟酸等),以及具有选择性的浮选调整剂。精选作业中,需要特殊的药剂制度(各种极性基捕收剂的配合使用,等)。为拟定锡石浮选最适宜的药剂制度,研究了捕收剂和调整剂的吸附机理,以及锡石晶格夹杂物的影响。人工制成了含各种金属杂质的锡石晶体,确证了这些杂质对锡石的浮游度、溶解度及其他物理化学性质的影响。对于同锡石伴生的一些矿物,研究了其水萃取液的化学成分。它们会引起浮选矿浆离子组成的根本改变,使锡石浮选的选择性急剧降低。对于在锡石、电气石及其他矿物表面上形成的化合物,做了测定。它们是浮选药剂同矿浆离子反应的产物。苏联有许多矿床的矿泥锡石浮选是在较硬的水或海水内进行,因此必须专门研究选择性浮选的条件。极性和非极性药剂的联合使用,以及浮选矿浆的预先处理,可保证有最高的锡石浮选回收率。经这样处理后,气泡对锡石的脱落力增强了3～4倍,而对其他矿物的脱落力则降低或保持不变。按此条件从锡品位0.3～0.5％的矿泥中浮选锡石,锡精矿中锡石的回收率可不低于80～90％。
Cassava finely grained cassiterite, or is inherent in the ore, or in the mineral processing process due to mud stripping from the tin beneficiation occurred a lot of metal loss. In hydraulic and mechanical classifiers, fine-scale cassiterites tend to float on the surface of the slurry on shaker, jig and other re-selection equipment, often irreparably lost with the overflow. 70% of the total loss of tin in the beneficiation process is related to this. Flotation is the most effective way to increase the recovery of this type of cassiterite. On the various types of tin ore re-election slime, cited the flotation process of fine stone cassiterite. These ores are high in tourmaline or chlorite, iron oxide or copper sulfide, iron sulfide, etc., and topaz, fluorite, calcite and the like. According to the complexity of the ore material composition, the recommended cassiterite flotation reagent system or collector type (fatty acids, alkyl phosphate, hydroxamic acid, etc.), and selective flotation regulator. Selected operations, the need for special pharmaceutical system (with a variety of polar base collector with the use of, etc.). In order to develop the most suitable pharmaceutical system for cassiterite flotation, the adsorption mechanism of collectors and modifiers and the influence of inclusions in cassiterite crystal were studied. Artificially produced cassiterite crystals containing various metallic impurities confirmed the effect of these impurities on the floatation, solubility and other physicochemical properties of cassiterite. For some minerals associated with cassiterite, the chemical composition of the aqueous extract was studied. They cause a fundamental change in the ionic composition of the flotation pulp and drastically reduce the selectivity of cassiterite flotation. The compounds formed on the cassiterite, tourmaline and other mineral surfaces were measured. They are the product of the reaction of flotation reagents with pulp ions. There are many mineral deposits in the Soviet Union. Caustic flotation is performed in harder water or seawater, so special conditions for selective flotation must be studied. The combination of polar and nonpolar agents and the pre-treatment of flotation slurry ensure the highest flotation recovery of cassiterite. After this treatment, the bubble on the cassiter off force increased by 3 to 4 times, while the other minerals shedding force is reduced or remain unchanged. According to this condition, the flotation rate of cassiterite in the slime 0.3 ~ 0.5% from the grade of tin can be not less than 80 ~ 90%.