2results about How to "Guaranteed leaching rate" 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 the technical field of tea making, and discloses a polymorphic bio-enzyme preparation for improving dark green tea quality and a tea making process, the polymorphic bio-enzyme preparation contains tannase, polysaccharide hydrolase, polyphenol oxidase, protease and the like, the polysaccharide hydrolase comprises cellulase, pectinase, beta-glycosidase or amylase, and the polyphenol oxidase comprises cellulase, pectinase, beta-glycosidase or amylase. The enzyme is subjected to crosslinking-embedding-crosslinking immobilization treatment, is compounded with bacillus natto fermentation liquor and high-temperature aroma-enhancing yeast fermentation liquor, and is applied to a dark tea making process, so that the thermal stability and storage stability of the enzyme are improved, and the enzyme activity is improved; the content of aroma substances such as beta-linalool, geranyl acetone and dihydroactinidiolide can be increased in the fermentation process, so that the problem of bitterness of the dark green tea is solved, the quality of the dark green tea is greatly improved, and the method has very good popularization and application values; the process is simple, easy to operate and suitable for large-scale production and use.