Zinc recovery method for silicon dioxide detection

Abstract

The invention relates to a zinc recovery method for silicon dioxide detection, which comprises the following steps: weighing and recording the mass of a secondary zinc oxide raw material, respectivelysampling, detecting the mass of zinc oxide in a first sample, calculating the mass of zinc oxide in the secondary zinc oxide raw material, and detecting the mass of silicon dioxide in a second sample, calculating the mass of silicon dioxide in the secondary zinc oxide raw material, calculating the ideal mass fraction of silicon dioxide in the residual solid when zinc oxide in secondary zinc oxideis completely leached in an ideal state, and taking the ideal mass fraction as a judgment value; filtering the leaching solution and leaching residues, drying the leaching residues, measuring the mass of the leaching residues, and calculating the actual mass fraction of silicon dioxide in the leaching residues; and judging whether zinc is completely leached or not according to the size relationship between the actual mass fraction and the judgment value. According to the method, the leaching degree of zinc is judged according to the content of silicon dioxide in the leaching residues, the leaching degree of zinc can be judged only by one-time detection, and the detection efficiency and the working efficiency are improved.

Description

technical field [0001] The present invention relates to the production technical field of petrochemical and chemical class fine chemicals, more specifically, it relates to a kind of zinc recovery method of silicon dioxide detection. Background technique [0002] my country is a big country in the production and consumption of lead and zinc, and the production capacity of secondary zinc oxide, a by-product in the process of lead and zinc smelting, is also increasing simultaneously. At present, my country's high-grade zinc oxide is mainly produced from raw materials with better zinc grade and low impurity content, while secondary zinc oxide is mainly used to produce some low-grade zinc salts and chemical additives due to its high impurity content and difficult handling, resulting in the overall The recycling rate of resources is low, the product quality is poor, the cost is high, and it is easy to cause secondary pollution in the production process. The chemical composition of...

AI Technical Summary

Problems solved by technology

At present, my country's high-grade zinc oxide is mainly produced by raw materials with better zinc grade and low impurity content, while secondary zinc oxide is mainly used to produce some low-grade zinc salts and chemical additives due to its high impurity content and difficult handling, resulting in the overall The recycling rate of resources is low, the product quality is poor, the cost is high, and it is easy to cause secondary pollution in the production process

The chemical composition of sub-zinc oxide varies greatly with different ore sources, and the content of zinc oxide is 45%-65%. At present, the process of recovering zinc in sub-zinc oxide needs to monitor whether the zinc in sub-zinc oxide is completely leached. The best way is to detect the content of zinc ions in the leaching solution, so as to judge, but this detection method needs to measure the zinc content before and after leaching, and the number of detections is too many, which is not conducive to improving production efficiency

Secondary zinc oxide also contains silicon dioxide, which is relatively stable in nature. When using secondary zinc oxide as raw material to recover zinc oxide or other precious metals, whether acidic solution is used as the leaching solvent or weakly alkaline solution is used as the leaching solvent , the silica will not be leached, so in the zinc recovery process, the silica is continuously enriched, but there is currently no way to combine silica with the zinc recovery process