3 results about "Cadmia" patented technology

This invention belongs to the field of mineral processing technology, specifically relating to a selective sulfidation roasting-flotation separation method for a smithsonite-calcite mixed ore. The method first involves crushing and grinding the smithsonite, calcite, and sulfiding agent, then mixing them in a certain proportion and subjecting them to sulfidation roasting, preferentially causing the smithsonite to undergo sulfidation. After cooling the roasted product in an inert atmosphere, flotation separation is performed using xanthate as a collector to obtain zinc concentrate. By controlling the atmospheric conditions during the sulfidation roasting process, the sulfidation reaction efficiency of the smithsonite can be improved, and the generation of sulfur oxide gases during roasting can be reduced. When using this method to process the smithsonite-calcite mixed ore, effective recovery of the smithsonite can be achieved, with a flotation recovery rate exceeding 88%. This invention features a simple process flow and easily controllable operating conditions, providing a new technical approach for the efficient utilization of smithsonite resources.

The invention provides a method for enhancing the flotation effect of low-grade zinc oxide ore by adopting a composite collecting agent, and belongs to the technical field of lead zinc ore flotation. Starting from the thought of integrated selective regulation and control of the whole process of ore grinding, sedimentation and desliming, size mixing and lead floating and size mixing and selective zinc floating, sodium sulfide, water glass and a composite collecting agent are added step by step through all levels of flotation operation, and the flotation environment of smithsonite is regulated and controlled by developing a compound selective amine reagent. By means of the selective collecting effect of the composite collecting agent on smithsonite, the problems of high oxidation rate, sticky zinc oxide ore foam, low recovery rate, poor selectivity, high cost and the like are solved, the zinc recovery rate and the concentrate grade of the low-grade zinc oxide ore are improved, and efficient flotation recovery of the low-grade zinc oxide ore with the high oxidation rate is achieved. The technological process is simple and convenient, industrial production is easy, the zinc oxide ore containing calcium-containing minerals such as calcite and dolomite has good selectivity, and better zinc oxide flotation indexes can be obtained.

High-silicon gangue type low-grade zinc oxide ore high-efficiency beneficiation method, using fatty acid collector preferentially desiliconized flotation carbonate + carbonate concentrate amine + xanthate zinc sulfidation combined process, obtain low SiO2 impurity content of zinc oxide concentrate, realize the efficient recovery of high-silicon gangue type low-grade zinc oxide ore, including the following steps and conditions: one stage grinding, grinding fineness -0.074mm accounts for 40~60%, using sulfuric acid to adjust the pulp, using fatty acid collector to rough select carbonate, adding inhibitor to rough selection foam to carry out 3 times of cleaning, obtain carbonate concentrate with preliminary enrichment of zinc spar, the dissociation degree of zinc spar in the ore reaches more than 85%; carbonate concentrate adding inhibitor, using amine + xanthate sulfidation process to rough select zinc oxide, adding inhibitor to rough selection foam to carry out 4 times of cleaning, obtain zinc oxide concentrate; adding amine + xanthate combined collector to the tailings of rough selection to carry out scavenging, the middlings of cleaning and the concentrate of scavenging are returned in sequence. It has the advantages of obtaining higher grade zinc oxide concentrate, reducing production cost and improving the utilization rate of silicon gangue type low-grade zinc oxide ore.