42results about How to "Leaching is effective" patented technology

The invention relates to a production method of instant green tea soybean milk powder, belonging to the technical field of instant tea beverages. The invention solves the problem that the existing soy milk tea powder product does not well integrate the two flavors, and the two different powders are not easy to brew and dissolve, which affects the taste and taste, and provides a production of instant green tea soy milk powder In this method, green tea is extracted, filtered and concentrated to make a concentrated solution, and then mixed with soybean milk powder, and the ultrasonic dispersion technology is used to blend the two well, and finally the instant green tea soybean milk powder is obtained through pressurized spray drying , the flavor and effective ingredients of green tea have been integrated into the soy milk powder, which is easier to dissolve in water, easy to brew, and has better flavor and nutrition.

The invention relates to the field of metal smelting, particularly to a method for recovering zinc, indium, iron, and lead from a high-iron zinc oxide mixture smelted with zinc. The method comprises the following processes: a high-iron zinc oxide mixture neutral leaching process, a neutral leaching residue low acid leaching process, a low acid pressure filter residue peracid leaching process, a low acid leaching liquid prereduction process, and a indium enrichment recycling process; valuable metals are comprehensively recovered from the high-iron zinc oxide mixture; a generated neutral leaching liquid is adopted by a main zinc smelting system to generate electrolytic zinc; a hydrolyzing filter liquor generated from the indium enrichment recycling process contains relatively rich ferrous ions; the hydrolyzing filter liquor is adopted by the main system for removing impurities and generating high-grade indium enrichment residues; therefore, the high-iron zinc oxide mixture is effectively recycled, the problem of high-iron zinc oxide mixture treatment is solved, capability of comprehensive utilization of metal resources is increased, so that resources are comprehensively recycled, and environment protection is facilitated; the method has relatively good economic benefits and social benefits.

The invention relates to a comprehensive utilization method of slag iron ore concentrates of a wet-type zinc smelting furnace and belongs to the technical field of metallurgy. The method comprises the following steps: performing two-section counterflow leaching on raw material (slag iron ore concentrates in the wet-type zinc smelting furnace) in the presence of a hydrochloric acid aqueous solution serving as a leaching agent so that valuable metals such as iron, silver, copper, lead, zinc and arsenic in the slag iron ore concentrates enter a leachate; purifying the leachate by utilizing processes of metal iron powder replacement, control over pH (Power Of Hydrogen) value, arsenic sedimentation, sulfuration precipitation and the like, separating the valuable metals such as copper, silver, lead, zinc and arsenic, wherein the purified leachate is a pure FeCl2 aqueous solution; performing thermal decomposition on the pure FeCl2 aqueous solution in a spraying manner so as to obtain Fe2O3 powder; and absorbing the generated HCL gas with water so as to regenerate hydrochloric acid which returns to the leaching process. By the method, the valuable elements in the slag iron ore concentrates of the wet-type zinc smelting furnace are comprehensively separated and recycled; and the hydrochloric acid taken as a leaching agent can be recycled, so that the method realizes resource conservation and is friendly to the environment. During the whole process, the discharge of three wastes is basically avoided; all the resources are utilized to the greatest extent; and obtained products are convenient for subsequent treatment and processing. The method has the advantages of environmental friendliness, economical performance, energy conservation and high resource utilization rate, thereby being convenient for industrial production.

A manganese carbonate ore leaching method based on two sections of leaching, provided by the invention, comprises the following steps: adding high-grade manganese carbonate ore ground powder into a reactor, then adding anolyte and concentrated sulfuric acid and carrying out front-section leaching reaction for at least two hours; detecting residual acid left after reaction, accordingly adding a neutralizer to carry out neutralization, and introducing air to remove impurities; carrying out solid-liquid separation on ore pulp from which impurities are removed, then, putting one section of solids, obtained, into the reactor, adding concentrated sulfuric acid and anolyte, and carrying out leaching reaction for at least two hours; then, adding low-grade manganese carbonate ore powder, anolyte and concentrated sulfuric acid so as to carry out neutralization and leaching; finally adding a neutralizer, and introducing air to remove impurities; and carrying out solid-liquid separation on ore pulp from which impurities are removed so as to obtain an electrolysis qualified solution and solid residues. The method has the advantages of being low in residue quantity, high in leaching rate, low in sulfuric acid consumption, high in comprehensive recovery rate and the like.