3results about How to "Reasonable process route" patented technology

This invention discloses a method for the comprehensive utilization of sulfide tailings, relating to the field of sulfide tailings treatment technology. This method uses lead-zinc tailings as raw material and innovatively employs a combined "two-stage acid leaching-gravity separation-flotation" process. First, two stages of acid leaching selectively leach calcite associated with barite in the tailings, reducing the influence of muddy calcite while activating pyrite. Subsequently, the acid leaching residue undergoes gravity separation to further separate undissolved calcite, quartz, and other silica-containing gangue minerals. The gravity concentrate is then subjected to flotation to achieve the separation of barite and pyrite, ultimately obtaining high-purity barite and pyrite products respectively. This invention features a reasonable process route and simple operation, effectively solving the separation problem of fine-grained, high-viscosity lead-zinc tailings, achieving full-component purification and utilization of lead-zinc tailings, significantly enhancing the economic value of tailings resources, and reducing the environmental pressure caused by tailings stockpiling, thus demonstrating good economic, environmental, and social benefits.

A coal tar pitch-coated transition metal nitrogen-doped carbon nanotube composite electrode material, its preparation method, and its application are disclosed, belonging to the technical field of capacitor deionization electrode materials. The method includes: firstly, nitrogen-doping modification of carbon nanotubes to obtain nitrogen-doped carbon nanotubes; then, introducing a transition metal salt precursor and undergoing a first-stage heat treatment to obtain a transition metal-loaded nitrogen-doped carbon nanotube precursor composite material; subsequently, adding coal tar pitch and undergoing a second-stage heat treatment to obtain the coal tar pitch-coated transition metal nitrogen-doped carbon nanotube composite electrode material. In the obtained material, the nitrogen-doped carbon nanotubes provide a continuous conductive network and mass transfer channels, the transition metal component improves interfacial charge transport performance, and the coal tar pitch-derived carbon layer enhances structural stability and interfacial coupling ability, thereby improving the electroadsorption efficiency, rate performance, and cycle stability during capacitor deionization.

The invention discloses a dimethyl polysiloxane loop line separation process. The process comprises the following steps: (1) two-stage heating: carrying out two-stage heating on dimethyl dichloropolysiloxane hydrolysate; (2) flash separation: introducing the heated dimethyl polysiloxane hydrolysate into a flash tank for flash separation, and enabling the ring body discharged from the top of the flash tank to sequentially enter a condenser, a reflux tank and a ring body storage tank; and (3) secondary separation: monitoring the purity of the line body separated by flash evaporation at the bottom of the flash evaporation tank in good time, directly discharging the line body at the bottom of the flash evaporation tank into a line body storage tank through an extraction pump when the purity of the line body is greater than or equal to 99%, and feeding the line body at the bottom of the flash evaporation tank into a loop line separation tower for secondary separation when the purity of the line body is less than 99%, the loop body discharged from the top of the loop separation tower enters a condenser, and the line body discharged from the bottom of the loop separation tower enters a line body storage tank. The process has the advantages of reasonable process route, high separation efficiency, high product purity and low operation cost.