2results about How to "Reduce reservation" patented technology

The application discloses a kind of gold extraction processes of reinforced alkali leaching pretreatment for reducing sodium cyanide consumption, it is related to metallurgical technical field, including the following steps: the tellurium-containing gold material is mixed with water, and the treated slurry is obtained;Sodium hydroxide is added to the treated slurry, and the pH of the treated slurry is adjusted, so that the treated slurry is in alkaline conditions;Sodium sulfide is added to the treated slurry in alkaline conditions, and alkali leaching pretreatment is carried out, so that at least part of the tellurium-containing components on the surface of the tellurium-containing gold material are converted into dissolved tellurium-containing species and enter the alkali leaching solution;The application adds and continuously stirs the separable tellurium-containing species adsorption particles during the alkali leaching pretreatment stage, so that the dissolved tellurium-containing species in the alkali leaching solution are synchronously adsorbed and removed, thereby promoting the tellurium-containing gold material surface to continue to dissolve the tellurium-containing cover layer, and to form a gold exposed surface that is more easily leached by cyanide before cyanidation.

The utility model relates to drainage pipeline connection technical field, and its purpose lies in providing a new cast iron drainage pipeline floor penetrating pre -buried water stop pipe hoop, including the pipe body, the upper end outer wall of pipe body is fixedly arranged with the upper pipe mouth, and the outer side wall of upper pipe mouth near pipe body one end is fixedly arranged with the water stop wing ring, the lower end outer wall of pipe body is fixedly arranged with the lower pipe mouth, and the inner side wall of pipe body near lower pipe mouth forms the flow guide ring downward extension, and the flow guide ring and lower pipe mouth form a annular groove between. The utility model adopts the installation mode of pre -buried, makes water stop pipe hoop can once with main body simultaneously pre -buried when main body construction, when cast iron drainage pipeline installation straight pipe section only needs to connect with water stop pipe hoop, can reduce the reservation and secondary hole work of hole, effectively improved the water stop effect of floor structure and the overall performance of structure board, effectively overcome the process complexity of traditional reservation hole mode construction.