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

A collector and low-temperature technology, applied in solid separation, flotation, etc., can solve problems such as decline in concentrate yield, decline in concentrate grade, and increased beneficiation costs, achieving strong temperature adaptability, reduced beneficiation costs, and agent costs cheap effect

Active Publication Date: 2015-03-04
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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, ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 0.0625 moles (6.31 grams) of chemically pure n-hexylamine are mixed with 14.70 grams of 36.5% hydrochloric acid solution of mass concentration to obtain n-hexylamine hydrochloric acid solution, and the solution is added in 100 milliliters of three-necked flasks equipped with condenser tube, thermometer and dropping funnel. Place the flask in a spherical heater for heating; the heating temperature is 150°C to 200°C; then add 30.25 grams of phosphorous acid solution with a mass concentration of 33.90% dropwise into the three-necked flask from the dropping funnel, and the dropwise addition is completed within 10-20 minutes. At this point, the temperature of the reactant is about 80-90°C; continue to heat the reactant to 105°C, add 12.81 grams of formaldehyde solution with a mass concentration of 35.0% dropwise in the three-necked flask, and complete the dropwise addition in 10-20 minutes, and keep the reactant The temperature was 105-110° C. and heated to reflux for 3-6 hou...

Embodiment 2

[0018] 0.0625 moles (6.31 grams) of chemically pure n-hexylamine are mixed with 14.70 grams of 36.5% hydrochloric acid solution of mass concentration to obtain n-hexylamine hydrochloric acid solution, and the solution is added in 100 milliliters of three-necked flasks equipped with condenser tube, thermometer and dropping funnel. The flask was placed in a spherical heater to heat; then, 40.5 grams of phosphorous acid solution with a mass concentration of 33.90% was added dropwise from the dropping funnel to the three-necked flask, and the addition was completed within 10-20 minutes, when the temperature of the reactant was about 80 -90°C; continue to heat the reactant to 105°C, add 12.81 grams of formaldehyde solution with a mass concentration of 35.0% dropwise to the three-necked flask, and complete the dropwise addition in 10-20 minutes, and keep the temperature of the reactant at 105-110°C and heat to reflux After 3-6 hours, 69.08 g of an aqueous solution of n-hexylamine bis...

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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...

Claims

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Application Information

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IPC IPC(8): B03D1/014B03D101/02
Inventor 董颖博林海张悦周闪闪
Owner UNIV OF SCI & TECH BEIJING
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