Preparation method of medium and low-temperature collecting agent of phosphorous ores

Abstract

The invention provides a preparation method of a medium and low-temperature collecting agent of phosphorous ores, and relates to the technical field of preparation of ore dressing agents. The preparation method specifically comprises the following steps of adding a hexylamine hydrochloric acid solution into a three-opening flask which is provided with a condensing device, dripping a phosphorous acid solution under the heating condition, heating a to-be-reacted substance to 105 DEG C, then dripping a formaldehyde solution, maintaining the reflux temperature, reacting for 3-6h, mixing the obtained hexylamine bis-methyl phosphonic acid solution and a certain amount of sodium dodecyl sulfate solution, and preparing the medium and low-temperature collecting agent of the phosphorous ores. The collecting agent has the characteristics that the synthesizing is simple and convenient, the cost is low, and the usage amount is small; for the medium and low-temperature floatation of the phosphorous ores, the dressing index is not less than the dressing index of the traditional collecting agent under the high temperature condition.

Description

technical field [0001] The invention relates to the technical field of preparation of ore dressing reagents, in particular to a preparation method of a low-temperature collector in phosphate rock. Background technique [0002] Most of the existing phosphate rock flotation collectors are fatty acid reagents, which have good collection and selectivity under heating conditions (above 30°C), but under normal temperature or low temperature conditions (10-25 ℃), the flotation performance of fatty acid collectors deteriorates due to a substantial decrease in its solubility and dispersibility in pulp. exhibited a decrease in concentrate yield, P 2 o 5 The recovery rate is not high. In order to ensure the separation index, the phosphate rock processing plant needs to heat the pulp in autumn and winter, especially in the north, where the heating of the pulp consumes a lot of heat energy, which not only increases the cost of mineral processing, but also increases the emission of car...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing phosphate rock flotation collectors are fatty acid agents, which have good collection and selectivity under heating conditions (above 30°C), but under normal temperature or low temperature conditions (10-25 ℃), the flotation performance of fatty acid collectors deteriorates due to a significant decrease in its solubility and dispersibility in the pulp

exhibited a decrease in concentrate yield, P 2 o 5 Problems such as low recovery rate

In order to ensure the separation index, the phosphate rock processing plant needs to heat the pulp in autumn and winter, especially in the north, where the heating of the pulp consumes a lot of heat energy, which not only increases the cost of mineral processing, but also increases the emission of carbon and sulfur, causing environmental pollution. Pollution

[0003] The realization principle of the existing low-temperature collectors in phosphate rocks is mostly to add a certain amount of surfactants (such as sodium lauryl sulfate, sodium dodecyl sulfate, Tween series, Alcohols, etc.), the combined use of conventional fatty acid collectors and surfactants can improve the dispersibility of fatty acid collectors under low temperature conditions to a certain extent, thereby improving the recovery rate, but the resulting Concentrate production increases (the process needs to be adjusted or even equipment replaced at this time), and problems such as decline in concentrate grade are more serious