Preparation method and application of limonite inhibitor

Abstract

The invention relates to a preparation method and application of a limonite inhibitor. The preparation method comprises the steps that lignosulfonate is added into a sodium hydroxide solution so as to be dissolved, and then a calcium humate solution with the mass concentration of 15% is added and is mixed with the mixture to obtain a product A; phthalocyanine blue is added into a sodium sulfide solution to be dissolved and is mixed with the product A according to the volume ratio of 1-2:1, and coupling is carried out for 1-1.5 hours under the condition that the pH value is 8-9 and the temperature is 150-160 DEG C to obtain a product B; and then the product B is coupled with toluidine for 2-2.5 hours under the condition that the pH value is 7.5-8, then filtering is carried out, and drying is carried out to obtain black powder, namely the limonite inhibitor. According to the preparation method and the application of the limonite inhibitor, the prepared limonite inhibitor has no inhibition effect on quartz in ores so that quartz minerals and limonite minerals can be floated and separated to a larger extent, and therefore the flotation efficiency can be improved, and the concentrate grade and the recovery rate of limonite can be improved.

Description

technical field [0001] The invention relates to the technical field of ore dressing, in particular to a preparation method and application of a limonite inhibitor. Background technique [0002] In the recovery process of some quartz-containing limonite, after the ore is ground until the mineral monomers are dissociated, the high-gradient magnetic separator is used for recovery, but if the recovered limonite concentrate is smelted as a smelting raw material, on the one hand Because the iron grade is too low, the smelting cost is too high and has no economic value. On the other hand, the quartz content in the concentrate is too high, which affects the quality of steel. For this quartz-containing limonite concentrate, it is necessary to increase the grade of limonite concentrate and reduce the quartz content in the concentrate before it can be used. Because the difference in floatability between quartz and limonite is small, it is generally difficult to separate, even if If it...

AI Technical Summary

Problems solved by technology

[0002] In the recovery process of some quartz-containing limonite, after the ore is ground until the mineral monomers are dissociated, the high-gradient magnetic separator is used for recovery, but if the recovered limonite concentrate is smelted as a smelting raw material, on the one hand Because the iron grade is too low, the smelting cost is too high and has no economic value. On the other hand, the quartz content in the concentrate is too high, which affects the quality of the steel.

For this quartz-containing limonite concentrate, it is necessary to increase the grade of limonite concentrate and reduce the quartz content in the concentrate before it can be used. Because the difference in floatability between quartz and limonite is small, it is generally difficult to separate, even if Occasionally, the grade and recovery rate of limonite concentrate are not high, which limits the development and utilization of limonite