Gallium extracted waste liquor resource utilization technology in process of one-step acid solution method technology

Abstract

The invention discloses a gallium extracted waste liquor resource utilization technology in the process of the one-step acid solution method technology. The technology comprises the following steps that firstly, iron in gallium extracted waste liquor is extracted, and low-iron raffinate and an iron-contained load organic phase are obtained; secondly, a stripping agent is used for carrying out reverse extraction on the load organic phase, and a reverse extraction liquid ferric chloride solution is obtained; and thirdly, the ferric chloride solution is subjected to mist spraying and roasting, thus ferric chloride is decomposed to obtain ferric oxide red and chlorine hydride gas, the low-iron raffinate is utilized for absorbing and dissolving the chlorine hydride gas in the acid absorbing working procedure, and an obtained acid solution serves as acid for coal ash acid solution in the one-step acid solution method. According to the technology, resource recycling of iron ions, aluminum ions and hydrochloric acid in the waste liquor can be achieved with the low cost, and the technology is environmentally friendly and saves energy.

Description

technical field [0001] The invention relates to a resource utilization technology of gallium-extracting waste liquid in the one-step acid-dissolving process, which is applied to the high-concentration iron, aluminum ions and other small amount of impurity ions (K , Na, Ca, SiO 2 ) resource utilization of acid gallium extraction waste liquid, specifically, the patented invention can solve the problem of resource utilization of industrial waste liquid containing relatively high concentrations of ferric chloride, aluminum chloride and free hydrochloric acid in this industry. Background technique [0002] The one-step acid-dissolving process technology is independently developed by China Shenhua Co., Ltd., which is world-leading and domestically pioneered by the China Nonferrous Metals Industry Association and the China Coal Industry Association. Alumina production technology from ash. In this process, in the process of iron removal and gallium extraction by resin, gallium ext...

AI Technical Summary

Problems solved by technology

Compared with various acid waste liquid treatment methods, such as adding alkali to neutralize the treatment, the cost of neutralizing agents, sedimentation residue treatment and storage sites is relatively high, and "secondary pollution" will also be generated during the treatment process, which cannot achieve environmental protection. Nearly zero emissions, and the iron, aluminum and acid in the gallium extraction waste liquid cannot be recycled during the neutralization process, resulting in waste of resources; if evaporation and concentration treatment is adopted, due to the high concentration of ferric chloride and aluminum chloride and the high viscosity Large, solids cannot be obtained by evaporation and concentration, so the evaporation and concentration method is not advisable; if the spray roasting-acid regeneration technology is used, although the acid regeneration can be realized and the recycling of hydrochloric acid can be realized, the solid obtained is a mixture of alumina and iron oxide. It has no utilization value and cannot realize the resource recovery and utilization of a large amount of iron and aluminum ions

[0004] To sum up, among the current treatment methods for acidic waste liquid containing iron and aluminum ions, there is no economical and environmentally friendly treatment method for gallium extraction waste liquid

Images