2results about How to "Increase sedimentation rate" patented technology

The utility model discloses an electroplating cyanide-containing wastewater treatment system, and relates to the technical field of wastewater treatment. Comprising a cyanide precipitation system, an acidification system, a crystallization aging system, a primary flocculating settling system, a solid-liquid separation system, a primary cyanide breaking oxidation system, a secondary cyanide breaking oxidation system and a secondary flocculating settling system which are sequentially communicated according to the treatment direction of the cyanide-containing wastewater. The waste water treatment device can reduce consumption of chemical oxidizing agents in the waste water treatment process, is beneficial to recovery of valuable metals, and is simple in process and easy to operate.

This invention discloses a process for preparing modified silica from vanadium ore leaching tailings, belonging to the field of industrial waste treatment and utilization technology. The steps include: (1) non-grinding alkaline leaching of silica: vanadium ore leaching tailings are leached without grinding with sodium hydroxide and water in a certain ratio and then heated for leaching; after cooling, the residue and filtrate are obtained by solid-liquid separation, and the filtrate is water glass; (2) preparation and modification: self-composite electrolyte is added to water glass, and a new combination modifier is added, followed by acid neutralization to produce silica gel precipitate, which is dried and ground to obtain modified silica product; the electrolyte includes 60% to 80% sodium sulfate and 20% to 40% sodium carbonate by mass percentage; the modifier includes 40% to 80% hexadecyltrimethylammonium bromide and 20% to 60% sodium dodecyl sulfate by mass ratio. The process of this invention can turn the vanadium acid leaching tailings from clay vanadium ore into a valuable resource, achieving reduced treatment and resource utilization, while also producing high-quality silica products.