58results about How to "Good technical and economic indicators" patented technology

The invention provides a classifying suspension roasting device for complex refractory iron ore. The device comprises a suspension preheating oxidizing device, two-stage cyclone classifiers, two-stage suspension reducers, a cyclone separator and a draught fan, wherein the suspension preheating oxidizing device communicates with the first-stage cyclone classifier, and the first-stage cyclone classifier communicates with the second-stage cyclone classifier; the second-stage cyclone classifier communicates with the cyclone separator, and the cyclone separator communicates with the draught fan; discharging ports of the first-stage classifier and the second-stage classifier are correspondingly inserted into the first-stage suspension reducer and the second-stage suspension reducer. With the adoption of the device, coarse and fine materials can be classified, magnetized and roasted, and thus the reduction conditions of the materials at different classes can be controlled; in addition, the energy consumption can be greatly reduced, and the optimal technical-economic indicator can be obtained.

The invention provides a comprehensive recovery and beneficiation method for low-grade uranium-containing polymetallic ore. The comprehensive recovery and beneficiation method comprises the followingsteps that (1) overflow products obtained by grinding the uranium-containing polymetallic ore are subjected to direct flow magnetic separation roughing operation and reverse flow magnetic separation concentration operation in sequence, and iron concentrate and first tailings are obtained; (2) the tailings are subjected to condensation and flotation to obtain first concentrate and second tailings,the first concentrate is subjected to concentration to obtain lead silver concentrate, and the second tailings are subjected to scavenging to obtain third tailings; and (3) the third tailings are subjected to flotation roughing and condensation, and then uranium, niobium and rare earth mixed concentrate is obtained. The beneficiation index is good, the purpose of fully recovering all useful components in coarse-grain coarse concentrate subjected to tailing discarding through gravity concentration under the coarse grinding condition is achieved, an efficient beneficiation separation and enrichment technology is provided for large-scale development and utilization of the low-grade complex polymetallic hard rock uranium ore in China, and the subsequent cost of extracting uranium, niobium andrare earth in the uranium ore through hydrometallurgy is greatly lowered.