5results about How to "Change nature" patented technology

The application discloses a method and system for comprehensively utilizing high-magnesium nickel sulfide ore by a low-temperature oxygen-rich method. The method comprises the following steps: obtaining pre-leaching residue by pre-leaching and magnesium removal with high-magnesium nickel sulfide ore as raw material; obtaining activated ore slurry by mechanically activating the pre-leaching residue; and obtaining a nickel-containing leaching solution by low-temperature oxygen-rich leaching of the activated ore slurry. The application has wide application range, is simple and reliable, easy to control, and low in investment cost, and can convert metals into corresponding products, so that high-magnesium nickel sulfide concentrate can be treated at low cost and high efficiency.

The invention relates to a laser cladding ceramic phase composite reinforced iron-based high-entropy alloy coating as well as a preparation method and application thereof. The laser cladding ceramic phase composite reinforced iron-based high-entropy alloy coating comprises high-entropy powder and WC powder, the mass of the WC powder accounts for 1 wt.%-40 wt.% of the mass of the high-entropy powder; the high-entropy powder comprises Fe metal powder, Co metal powder, Cr metal powder, Ni metal powder and Mo metal powder which are arranged in an equal molar ratio. Compared with the prior art, the WC is added into the high-entropy alloy coating to change the structure of the coating, so that the properties of the coating in practical application are changed. The Mo element can promote formation of a sigma phase, a hard net-shaped framework is formed in the material, the grain boundary stability is improved, then the structural stability of the coating is improved, and excessive precipitation of a brittle phase is avoided while carbide distribution is optimized through a proper amount of WC. And the addition of WC can cause the solid solution strengthening effect of the high-entropy alloy, so that the hardness of the coating is improved.

The invention provides an efficient composite sludge dewatering conditioner and a preparation and use method thereof, and belongs to the technical field of sludge treatment agents, the sludge dewatering conditioner comprises poly dimethyl diallyl ammonium chloride, a polyferric sulfate solution, sodium percarbonate particles and slag porous particles; the polymeric ferric sulfate solution is a liquid with the effective iron content of 6-16%; the poly dimethyl diallyl ammonium chloride and the polymeric ferric sulfate solution are subjected to a mixed reaction under the heating condition according to the weight ratio of 1: (12-20), and a copolymer of poly dimethyl diallyl ammonium chloride and polymeric ferric sulfate is obtained; a copolymer is generated through a mixing reaction, sodium percarbonate particles and slag porous particles are added while stirring is conducted, and a finished product is obtained after sufficient and uniform mixing is conducted. The sludge water content can be reduced, the sludge increment is small, the use method is simple and convenient, the volume and the amount of the sludge are greatly reduced, the cost is low, and the method is environment-friendly.

The invention discloses a method for preparing a fertilizer on the basis of ultrafiltration pretreatment of proline fermentation liquor, and relates to the technical field of fertilizer preparation, and the method comprises the steps of proline fermentation liquor pretreatment, nutrient substance blending, fermentation waste liquor pretreatment, liquid fertilizer preparation and quality detection. Various enzymes react with organic substances in the fermentation liquor, the cellulase can decompose polysaccharide substances such as cellulose in the fermentation liquor and convert the polysaccharide substances into micromolecular saccharides which are more easily absorbed by plants, and the protease can hydrolyze protein and release nutritional ingredients such as amino acid; the amylase can decompose carbohydrates such as starch into monosaccharides such as glucose, the above reactions can improve the nutrient content and the bioavailability of the fermentation liquor, and the three groups of filtering devices are used for filtering the proline fermentation liquor in sequence, so that impurities with different particle sizes can be effectively removed.

The invention provides an acidic zinc-plated trivalent chromium black passivator as well as a preparation method and an application method thereof, and relates to the technical field of electrochemical deposition. The acidic zinc-plating trivalent chromium black passivator comprises a component A and a component B with specific composition, the component A comprises a trivalent chromium compound, oxalic acid, sodium hydroxide, nickel sulfate, cobalt sulfate, citric acid and water, and the component B comprises thiosemicarbazide hydrochloride, cystine and water. And the corrosion resistance of the passivation layer is good.