5 results about "Zinc sulfide" patented technology

The invention discloses a high-temperature resistant anti-corrosion clay special for an acid pressure oxidative leaching high-pressure autoclave, which is characterized by being prepared from the following raw materials in percentage by weight: 20-40 percent of vinyl epoxy synthetic resin and 60-80 percent of padding, wherein the padding contains the following raw materials in percentage by weight: silica fume, glass flake, titanium dioxide powder, graphite powder, aluminum oxide and barium sulfate. A preparation method of the high-temperature resistant anti-corrosion clay special for the acid pressure oxidative leaching high-pressure autoclave comprises the following concrete process: adding the vinyl epoxy synthetic resin and the padding into a reaction kettle, heating, and stirring andrubbing in vacuum sufficiently until no dry powder or bubbles exist, and finally obtaining the high-temperature resistant anti-corrosion clay special for the acid pressure oxidative leaching high-pressure autoclave. The clay prepared by the invention can meet the requirements of high temperature resistance, anticorrosion, abrasion resistance, low permeability and extremely high heat stability when carrying out direct acid pressure oxidative leaching on zinc sulfide concentrate in the high-pressure autoclave and is simple in process and convenient to manufacture.

The invention discloses a method for secondarily enriching zinc from low-grade high-oxidization-rate oxygen-sulfur mixed zinc ore. The method comprises the steps of 1, ore grinding; 2, neutral leaching, wherein the leaching final point pH is controlled to be 5.0-5.2, ore pulp obtained after a reaction is delivered for liquid-solid separation, supernate is delivered for zinc precipitation, and baseflow is delivered for acid leaching; 3, acid leaching, wherein the final point pH is controlled to be 0.5-1.0, ore pulp obtained after a reaction is delivered for liquid-solid separation, supernate is returned for neutral leaching, and after filter pressing of base flow is completed, leaching residues are obtained; 4, zinc precipitation, wherein the oxygen-sulfur mixed zinc ore is added, after areaction, ore pulp obtained after zinc precipitation is delivered for liquid-solid separation, so that zinc-rich residues and zinc precipitation post-liquid are obtained, and after acidity adjustmentis completed, the zinc precipitation post-liquid is returned for acid leaching; 5, flotation, wherein the leaching residues obtained in step 3 are delivered to the flotation procedure, and zinc sulfide is recycled; and 6, volatilization, wherein the zinc-rich residues obtained in step 4 are delivered to a reduction volatilization procedure, so that second zinc oxide is obtained. According to the method, two-stage leaching is adopted, so that the leaching rate of the zinc in the oxidized ore is greater than 90%; and secondary zinc precipitation and enrichment is conducted on leachate through the oxygen-sulfur mixed ore, so that the zinc precipitation rate is greater than 99.5%, and the zinc content of the zinc-rich residues is 16-25%.

The invention relates to a polypropylene grass and cold prevention fabric, a preparation method thereof and an application of the fabric. The method includes the steps: mixing mica and urea, adding deionized water to ultrasonically disperse mixture, adding sodium stannate and zinc sulfate water solution, and filtering, drying and calcining mixture to obtain a zinc sulfide-mica-based flame retardant; mixing the polypropylene, nucleating agents, antioxidants, dispersing agents and the zinc sulfide-mica-based flame retardant, extruding and granulating mixture, heating the mixture to reach the temperature of 130-180 DEG C, and extruding, cooling and drawing the mixture by a spinneret plate to obtain primary spun fibers; heating the primary spun fibers, drawing the heated primary spun fibers tobe aggregated into a net, bonding the net to form the fabric to obtain the polypropylene grass and cold prevention fabric. The polypropylene grass and cold prevention fabric has various physiologicaland ecological effects of breathability, increasing temperature, preserving soil moisture, avoiding tillage, increasing fertility, preventing and decreasing pests and diseases and the like and has the advantages that water is saved, electricity, labor and fertilize consumption is reduced, the control cost of the pests and diseases is reduced and the like.