2results about How to "Achieve desulfurization" patented technology

A novel process for desulfurizing spodumene smelting slag using EDTA is presented. This process uses the final solid waste obtained from the water leaching lithium extraction process after sulfuric acid roasting of spodumene as raw material. A prepared EDTA solution is added to the smelting slag containing approximately 10% calcium sulfate, allowing the raw material to fully react with the EDTA solution, thus achieving desulfurization of the smelting slag. Finally, the filtrate is subjected to rotary evaporation precipitation, and the EDTA solution is recovered and recycled. This process has high resource utilization, not only achieving 99.9% desulfurization of the smelting slag in a short time but also enabling the recycling of the EDTA solution. The desulfurization method provided by this process is highly efficient, simple, and transforms waste into valuable resources, increasing economic benefits. Furthermore, it effectively addresses the environmental compatibility issues of solid waste in the existing lithium mining industry, which is of great significance for the sustainable and high-quality development of the lithium battery industry.

This invention discloses a process for the synergistic treatment of multiple wastes using an anaerobic system. Utilizing one or more anaerobic organic wastewater treatment systems, one or more types of externally generated waste are selectively introduced into the system. Organic pollutants in the water act as electron acceptors, and through microbial metabolism, the waste is rendered harmless and recycled, while also enhancing the system's processing capacity, generating energy, or recovering resources. The method includes five treatment modes: treating organic waste to increase biogas production, treating ferrous sulfide waste to recover ferrous sulfide, treating hexavalent chromium-containing waste liquid to recover chromium, treating nitrogen-containing waste to reduce it to nitrogen gas, and controlling sulfur-containing odors and performing in-situ desulfurization. Waste activated carbon is added in slurry form after grinding and fluidization, and the desulfurization mode uses a sulfate-free ferrous salt solution. This invention expands the anaerobic system into a synergistic treatment center for multiple industrial wastes, achieving waste-to-waste treatment, increased energy production, and resource recovery. The process is flexible and highly adaptable.