Iron detection method for precious metals in solution

Abstract

The invention provides an iron detection method for precious metals in a solution, which comprises the following specific steps: extracting a 5ml exchanged solution into a clean 60ml separating funnel, adding hydrochloric acid, and standing; after heat disappears, adding ethyl acetate, fully oscillating for 1 minute, standing for layering, and carefully discharging a solution containing precious metal at the lower layer; adding hydrochloric acid, fully oscillating, standing for layering, and discharging a lower-layer solution; taking the lower-layer solution, finally dropwise adding KCNS, comparing the developing degree with a standard colorimetric plate, and judging the content of iron in the solution. Through judgment of a verification test, the content of precious metals in the exchangesolution can be determined clearly, so that the exchange degree of the precious metals in the solution is judged; the method is simple in process and convenient to operate, the waste liquid utilization rate is effectively increased, and the precious metal recycling efficiency is improved.

Description

technical field [0001] The invention relates to a method for detecting iron, in particular to a method for detecting iron of precious metals in a solution. Background technique [0002] In recent years, with the increasing environmental cost, green and environment-friendly precious metal collectors have become the focus of research. A method of making pellets by using magnetic substances, iron powder, iron ore or iron oxide as a collector, and precious metal materials, additives and reducing agents, and reducing them under a protective atmosphere to obtain precious metal alloy pellets, and then ball milling, acid The leaching removes the base metals, and the enrichment effect of the precious metals is poor, and the grinding will cause the precious metals to disperse in the slag, resulting in a low recovery rate of the precious metals and high energy consumption. The existing precious metal extraction process has problems such as heavy metal pollution, high material consumpt...

AI Technical Summary

Problems solved by technology

A method of making pellets by using magnetic substances, iron powder, iron ore or iron oxide as a collector, and precious metal materials, additives and reducing agents, and reducing them under a protective atmosphere to obtain precious metal alloy pellets, and then ball milling, acid The base metals are removed by leaching, and the enrichment effect of the precious metals is poor, and the grinding will cause the precious metals to disperse in the slag, resulting in a low recovery rate of the precious metals and high energy consumption.

The existing precious metal extraction process has problems such as heavy metal pollution, high material consumption and energy consumption, large discharge of metallurgical waste, and low extraction rate of precious metals.

For the treatment of recovered solutions, the general treatment level is completed by long-term experience and judgment, and the maximum recovery cannot be achieved, resulting in waste of resources