Preparation method of environment-friendly type precious metal beneficiation agent

Abstract

The invention relates to a preparation method of a low-toxic environment-friendly type novel precious metal beneficiation agent. Raw materials of the low-toxic environment-friendly type novel precious metal beneficiation agent comprise a cyanate, sodium hydroxide, sodium sulfate, sodium ferrocyanide, a bromide, and a lead salt. The preparation method comprises following steps: sodium cyanate, sodium hydroxide, sodium sulfate, and sodium ferrocyanide are mixed at a certain ratio; an obtained mixture is delivered into a smelting pot which is heated to be slightly red, and is heated to 650 to 750 DEG C so as to obtain a fused material, temperature is maintained to be 750 DEG C for 30 to 50min of reaction, and then an obtained product is collected and cooled; the obtained product is smashed, the bromide and the lead salt are added for stirring, and the environment-friendly type precious metal beneficiation agent is obtained via combination. The environment-friendly type precious metal beneficiation agent can be widely used for precious metal beneficiation metallurgy of nonferrous metals ores, contains no hypertoxic compounds, is safe for human and animal, and is friendly to the environment. Compared with other metal beneficiation agents, the environment-friendly type precious metal beneficiation agent is excellent in effects, stable in performance, and low in production cost; the preparation method is simple; and environmental protection can be realized.

Description

technical field [0001] The invention belongs to an ore dressing agent, and relates to a precious metal ore dressing agent and a preparation method thereof. Background technique [0002] At present, precious metal dressing and smelting worldwide, especially about 70%-85% of gold production companies use sodium cyanide for gold extraction. Gold production by cyanide is a relatively mature production process. Its advantages are The process is simple, the production cost is low, and the leaching rate is high. The disadvantage is that the leaching time is long, the sodium cyanide is highly toxic, the harm to personal safety and agriculture, animal husbandry and fishery is serious, and it brings serious pollution to the environment of the mining production area. In the process of transportation, storage and use, it is often easy to cause environmental pollution incidents and malignant poisoning incidents. Therefore, the use of sodium cyanide to leaching gold is extremely harmful...

AI Technical Summary

Problems solved by technology

The above invention also has some disadvantages: 1. If the added amount of pH adjustment is not fixed, the active ingredient of the product will be unstable. 2. The main raw material is to add a large amount of urea, which will decompose when heated A large amount of harmful gases such as ammonia are emitted. 3. Their production processes have not undergone spray adsorption or other treatment methods, but are directly discharged

This will bring some air pollution to the production area during the preparation of the production agent

4. Furthermore, the dressing and smelting of precious metals by the above several kinds of dressing agents are only suitable for the dressing and smelting of oxidized precious metal ores, as described in their patents, and the dressing and smelting effects of primary ore and sulfide ores are very poor, and the dosage is very high. Big

It has been confirmed by the applicant that the leaching tests of the above several beneficiation agents are performed separately, and the leaching effect on primary ore and ore containing harmful impurities is not good