48results about How to "Realize separation and enrichment" patented technology

The invention provides a method for extracting rubidium from saline lake brine. The method comprises the following steps: (1) adding water-soluble carbonate precipitated magnesium ions into the saline lake brine, carrying out solid-liquid separation to obtain a first filtrate and a second filtrated cake, and enabling the content of magnesium ions in the first filtrate to be lower than 50mg / L; (2) extracting rubidium from the first filtrate by using 4-tert-butyl-2-(alpha-methylbenzyl) phenol as an extractant and using an extraction-backextraction alternate countercurrent extraction process in an environment that the amount-of-substance concentration of [OH-] is 0.8-1mol / L, wherein the concentration of 4-tert-butyl-2-(alpha-methylbenzyl) phenol in the extractant is 0.5-1mol / L. According to the method, rubidium is effectively obtained from brine with high concentration of potassium, and the efficiency of rubidium extraction is increased.

The invention discloses a technology for preparing zinc sulfate from high-chloride zinc slag and coproducing ammonium chloride. The technology comprises the following steps: (1) leaching chlorine fromthe high-chloride zinc slag through water washing-ammoniating two sections; (2) performing acid leaching on zinc in an ammonium leached residue by using oxidized sulfuric acid; (3) purifying chlorine-containing liquid; (4) preparing the ammonium chloride; (5) purifying zinc leached liquid. By a water washing-ammonium leaching and acid leaching step-by-step separation technology, the technical bottleneck problems during application of the conventional wet-process zinc smelting technology for recycling the zinc from the high-chloride zinc slag and discarding a chlorine resource are solved, so that the technology for recycling the zinc and chlorine from the high-chloride zinc slag is provided, and thus an environment-friendly technology for recycling the zinc and the chlorine at low cost, producing ammonium chloride and zinc sulfate products and ensuring zero discharge of three wastes is achieved; meanwhile, valuable metals lead, cadmium, copper and the like in the high-chloride zinc slag are enriched and recycled.

The invention discloses a method for separating arsenic and selenium from copper anode slime alkaline leach liquor. The method comprises the following steps: 1) oxidation, namely adding an oxidizing agent or introducing oxidizing gas into the copper anode slime alkaline leach liquor, so that oxidized copper anode slime alkaline leach liquor is obtained; 2) arsenic precipitation, namely adding a calcium salt into the oxidized copper anode slime alkaline leach liquor, stirring the obtained mixture so as to produce a precipitate, and carrying out filtration and separation on the precipitate so as to obtain a calcium arsenate precipitate and arsenic post-precipitation liquid; and 3) selenium precipitation, namely adding a barium salt into the arsenic post-precipitation liquid obtained in the step 2), stirring the obtained mixture so as to produce a precipitate, carrying out filtration and separation on the precipitate so as to obtain a barium selenate precipitate and selenium post-precipitation liquid, and carrying out evaporative crystallization on the selenium post-precipitation liquid so as to recycle alkali, or directly returning to a leaching process. The method disclosed by the invention is short in technological process, less in equipment and simple in operation, and can be used for realizing the separation and enrichment of arsenic and selenium, the precipitation rate of arsenic is higher than 96%, and the precipitation rate of selenium is higher than 99%; by virtue of carrying out evaporative crystallization on a solution for recycling or directly returning the solution to a leaching process, the recovery of alkali is realized.

The invention discloses a method for flotation of uranium minerals from volcanic rock type uranium ore. The method comprises the steps of crushing the volcanic rock type uranium ore, adding acid grinding and slurry adjustment to obtain the pulp; the pulp is adjusted by sodium carbonate Using water glass and sodium hexametaphosphate as inhibitors, hydroxamic acid compounds and fatty acid compounds as collectors, P507 as auxiliary collectors, and performing foam flotation under the action of a foaming agent to obtain uranium concentrates; By using water glass and sodium hexametaphosphate as inhibitors and using hydroxamic acid and fatty acid collectors in conjunction with P507 auxiliary collectors, this method not only greatly reduces the yield of flotation concentrates, but also reduces the flotation rate. The content of carbonate minerals in the concentrate can reduce the consumption of reagents in the subsequent leaching process and the processing capacity of hydrometallurgy ore; at the same time, the separation and enrichment of uranium minerals have been realized. The yield of flotation concentrate is 19.06%, the uranium grade is 1.073%, and the recovery The rate is 86.63%.

The invention discloses a method for adsorbing and separating vanadium resources in vanadium slag by porous media, and belongs to the field of metallurgical slag solid-liquid two-phase separation. The method for adsorbing and separating the vanadium resources in the vanadium slag by the porous media comprises the following steps that 1, a porous medium plate is prepared; 2, the molten vanadium slag is cooled from the temperature of 1500-1550 DEG C to 1200-1250 DEG C at a cooling rate of less than 2 DEG C / min, and a heat-treated molten vanadium slag containing solid-phase vanadium-iron spinel is obtained; and 3, absorbing for the heat-treated molten vanadium slag is conducted by the porous medium plate to finish solid-liquid separation, and fine vanadium slag with the vanadium-iron spinel phase grade being 70-90% and tailings are obtained. According to the method for absorbing and separating the vanadium resources in the vanadium slag by the porous media, the fusion slag phase in the heat-treated vanadium slag is absorbed by capillary force of the porous medium plate, separation and enrichment of the vanadium-iron spinel solid-phase in the heat-treated vanadium slag are achieved, the vanadium-iron spinel fine vanadium slag separated through the porous media can be directly used as raw materials of hydrometallurgical vanadium extraction and pyrometallurgy of vanadium-iron, and the porous medium plate for absorbing the tailings can serve as raw materials of cement production.

The invention discloses magnetic particles modified by polydopa / polyethyleneimine copolymer and its preparation and application. The preparation method comprises the following steps: adding COOH-MNPs to an alkaline solution of dopa, and then adding polyethylene imine, CuSO 4 and H 2 o 2 As an inducer, heat to 25-50°C and stir for 0.5-2.0 hours to separate and obtain polyDOPA / PEI‑MNPs. The polyDOPA / PEI-MNPs of the present invention has mild preparation conditions, simple and convenient operation, good reproducibility and stability, and can realize the separation and enrichment of catecholamines in diluted body fluids (especially blood).