Pyrite inhibitor in lead-sulfur bulk concentrate and preparation method of pyrite inhibitor

Abstract

The invention relates to a pyrite inhibitor in a lead-sulfur bulk concentrate and a preparation method of the pyrite inhibitor, and belongs to the technical field of beneficiation reagent preparation.The pyrite inhibitor is prepared from sodium hydroxide, sodium sulfite, sodium thiosulfate and fulvic acid. The preparation method comprises the following steps that (1) 10 parts of the sodium hydroxide and 0.1 part of fulvic acid are taken for preparing a 40%wt solution, and stirring is conducted for 30 minutes at 70 DEG C; (2) 6 parts of the sodium sulfite and 4 parts of the sodium thiosulfateare taken for preparing a 30% aqueous solution, and stirring is conducted for 5 minutes at 30 DEG C; (3) products obtained from the step (1) and the step (2) are mixed and stirred for 20 minutes underthe condition of 30-35 DEG C, faint yellow powder is obtained through crystallization concentration, and namely the pyrite inhibitor is obtained. According to the pyrite inhibitor in the lead-sulfurbulk concentrate and the preparation method of the pyrite inhibitor, the purpose that pyrite in a residual galena and pyrite mixed concentrate of a high collector is effectively inhibited can be achieved by using the product obtained through the preparation method, the using cost is low, the metal recovery rate is high, the pressure of upstream and downstream operation and water treatment operation can be lowered, the adaptability for flotation separation of the high-grade hard-to-separated lead-sulfur bulk concentrate is high, and the effect is significant.

Description

technical field [0001] The invention belongs to the technical field of preparation of mineral dressing agents, in particular to a method for preparing pyrite inhibitors in lead-sulfur mixed concentrates. Background technique [0002] For lead-sulfur mixed flotation concentrates with high chemical residues, since the mixed flotation stage is a weak alkali process, the content of heavy metal ions in the slurry is unavoidable, resulting in the activation of pyrite by copper and lead ions and the adsorption of a large amount of collectors. The conventional flotation process uses lime to suppress pyrite, and the amount of lime used is large. At the same time, calcium ions cause adverse interference to upstream, downstream and surrounding operations. Lime is not easy to dissolve, and it is easy to settle and block the chemical pipe during the transportation process. It is difficult to add the chemical and the stability of the process is poor. , the scale of the tank pipe is serio...

AI Technical Summary

Problems solved by technology

The conventional flotation process uses lime to suppress pyrite, the amount of lime is large, and calcium ions cause adverse interference to upstream, downstream and surrounding operations

Lime is not easy to dissolve, and it is easy to settle and block the chemical pipe during the transportation process. It is difficult to add the chemical and the stability of the process is poor. , the scale of the tank pipe is serious, and the calcium ion in the mixed floating stage greatly reduces the buoyancy of pyrite, which makes it easy for pyrite to be sent to the zinc selection operation, thereby reducing the quality of zinc concentrate, resulting in excessive consumption of flotation reagents, and pressure on environmental protection Large; for ores with high oxidation rate, the inhibition effect is not ideal, the dosage of the agent is too large, and it is even difficult to inhibit pyrite to achieve the purpose of lead-sulfur separation