50results about How to "Achieve leaching" patented technology

The invention discloses a method for preparing high-purity manganese sulfate from electrolytic manganese sulfide slag, which is carried out according to the following steps: (1) crushing and sieving; (2) oxidation leaching; (3) decalcification: adding saponified P204 to the leaching solution Extraction with the first organic extractant formed by mixing with sulfonated kerosene to obtain a calcium-loaded organic phase and manganese-cobalt-rich nickel-magnesium solution; (4) Manganese recovery: take manganese-rich cobalt-nickel-magnesium solution, add saponified P204 and sulfonated kerosene Extraction with the second organic extractant formed by mixing to obtain a manganese-loaded organic phase and a cobalt-rich nickel-magnesium solution; take the manganese-loaded organic phase, add sulfuric acid for back extraction, and obtain a P204 organic phase and manganese sulfate solution; (5) High-purity manganese sulfate preparation. The invention has the advantages of being simple and feasible, capable of realizing the leaching of manganese sulfide, avoiding the generation of hydrogen sulfide gas, using the iron-precipitating process and using the fluoride ion precipitation method for removing calcium and magnesium ions.

A high-efficiency coupling, polygeneration and low-nitrogen coal gangue activation process includes the following process steps: A. a coal gangue raw material is subjected to wide preheating to obtainfirst coal gangue having a water content of less than 0.8%; B. the first coal gangue is subjected to field effect low nitrogen roasting to obtain a first activated powder product and a high temperature flue gas; C. the high temperature flue gas is subjected to residual heat coupling adjustment to obtain a second activated powder product, a low temperature flue gas recycled to the step A to participate in the wide preheating and low temperature air recycled to the step B to participate in the field effect low nitrogen roasting. The process adopts the combination of mechanical, high temperatureand chemical three activation modes, the activation effect almost reaches the limit, the activation is no longer a single roasting process, the thermal energy in the flue gas is fully utilized, and the coupling adjustment form is designed, the material itself is preheated for drying, combustion air is preheated, and external heat is supplied.

The invention discloses a method for preparing a ternary positive electrode material by utilizing manganese-cobalt-nickel waste residue, which is carried out according to the following steps: (1) crushing and sieving; (2) oxidative leaching; (3) calcium removal; (4) optimization of manganese-cobalt-nickel Magnesium ratio; (5) Preparation of magnesium ion-doped manganese-cobalt-nickel ternary cathode material precursor; (6) Preparation of ternary cathode material; (7) Surface modification: The ternary cathode material is dispersed in water, According to a certain mass ratio, the manganese-rich cobalt-nickel-magnesium solution and ammonium fluoride after decalcification in step (3) are used as modifiers to modify the surface of the ternary cathode material. The method is simple and feasible, can realize leaching of manganese-cobalt-nickel-magnesium waste residue, filter and remove impurities from the filtrate, directly prepare magnesium ion-doped manganese-cobalt-nickel ternary positive electrode material precursor, and prepare ternary positive electrode material, which can not only realize The comprehensive utilization of waste residue can also improve the ionic conductivity of the product, inhibit the increase of electrochemical impedance, and improve the cycle performance.

The invention discloses a method for leaching gold and silver out of kustelite wrapped by manganese under normal pressure and temperature. The method includes the steps that raw ore grinding is performed; pretreatment is performed through sulfuric acid and reduced iron powder; filtering is carried out; and manganese-leaching slag obtained through filtering is subjected to cyanide leaching to obtain the gold and silver. Compared with existing methods for leaching the gold and silver out of the kustelite wrapped by the manganese, the method achieves pretreatment of the kustelite wrapped by the manganese under low acid concentration and normal pressure and temperature, the gold and silver leaching rate is substantially increased, and the method is applicable to the kustelite wrapped by the manganese.