Preparation method and application of dolomite inhibitor

An inhibitor and dolomite technology, applied in solid separation, flotation and other directions, can solve the problems of using more chemicals, high production cost, affecting the recovery of fluorite, etc., and achieve the effect of less agent dosage and improved grade

Active Publication Date: 2014-04-02
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some fluorite deposits contain a large amount of dolomite minerals. It is difficult to separate this type of fluorite minerals. On the one hand, the calcium ions in dolomite minerals are similar to those in fluorite minerals. On the other hand, dolomite minerals The activity of magnesium ions in minerals is very strong, coupled with the interference of other impurity minerals, resulting in difficulty in flotation separation; and because other impurity minerals tend to become very fine particles during grinding, forming slime, affecting the recovery of fluorite , not only makes the structure of the flotation process complex, but also uses many chemicals, high production costs, and low content of fluorite concentrate, which limits the development and utilization of this type of fluorite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] An example of the preparation method of dolomite inhibitor of the present invention, comprises the following steps:

[0013] First, mix sulfuric acid, hydrochloric acid and water according to the mass ratio of sulfuric acid: hydrochloric acid: water = 2:1:8 to obtain solution 1, then add benzoic acid or nitrobenzene into solution 1 according to the mass ratio = 1:3, and stir until dissolved to obtain Solution 2; then add sulfate or sulfite dissolved in water into solution 2 at a mass ratio of 1:3, control the temperature of solution 2 at 40°C, keep stirring for 6 hours to obtain solution 3, and filter solution 3 to obtain crystallization The dolomite inhibitor is obtained by drying the crystalline viscous material at 60°C.

Embodiment 2

[0015] Another example of the preparation method of dolomite inhibitor of the present invention, comprises the following steps:

[0016] First, mix sulfuric acid, hydrochloric acid and water according to the mass ratio of sulfuric acid: hydrochloric acid: water = 7:2:13 to obtain solution 1, then add benzoic acid or nitrobenzene into solution 1 according to the mass ratio = 3:10, and stir until dissolved to obtain Solution 2; then add sulfate or sulfite dissolved in water into solution 2 at a mass ratio of 2:7, control the temperature of solution 2 at 50°C, keep stirring for 7 hours to obtain solution 3, and filter solution 3 to obtain crystallization The dolomite inhibitor is obtained by drying the crystalline viscous material at 75°C.

Embodiment 3

[0018] This embodiment is an application example of the dolomite inhibitor in the flotation separation of fluorite and dolomite.

[0019] 1. Mineral raw materials:

[0020] The content of fluorite in the mineral raw materials used is 63.08%, the content of dolomite is 27.12%, the content of calcium carbonate is 2.56%, and the content of quartz is 5.57%. The phase analysis shows that the ore is mainly composed of fluorite, dolomite, carbonate And quartz form, and a small amount of argillaceous minerals.

[0021] 2. Chemical system and operating conditions: adjust the pH of the ore pulp to 9.5-10 with sodium carbonate, and test the dosage of inhibitor 500g / t and sodium oleate 550g / t. The results show that the above process and chemical conditions can effectively reduce firefly Dolomite and dolomite are separated by flotation. Under the condition that the fluorite content of the ore is 63.08%, after one roughing, four sweeping and six beneficiation, the fluorite content of the f...

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Abstract

A preparation method of a dolomite inhibitor comprises the following steps of firstly mixing sulfuric acid, hydrochloric acid and water by the mass ratio of the sulfuric acid to the hydrochloric acid to the water = 2-7:1-2:8-13 to obtain a solution 1, then adding benzoic acid or nitrobenzene into the solution 1 by the mass ratio of 1-3:3-10, and obtaining a solution 2 through stirring and solution; adding water-soluble sulfate or sulfite into the solution 2 by the mass ratio of 1-2:3-7, controlling the temperature of the solution 2 to be 40-50 DEG C, performing stirring reaction for 6-7h to obtain a solution 3, performing suction filtration on the solution 3 to obtain crystallized slime and finally drying the crystallized slime under the condition of 60-75 DEG C to obtain the dolomite inhibitor. By adopting the dolomite inhibitor, dolomites can be inhibited, and the fluorite concentrate grade is improved.

Description

1. Technical field [0001] The invention relates to a dolomite inhibitor, in particular to a preparation method and application of a dolomite inhibitor which needs to improve the grade of fluorite concentrate during the flotation and separation process of fluorite and dolomite. 2. Background technology [0002] In fluorite deposits, fluorite is generally associated with limestone, quartz and a small amount of other impurity minerals. For the recovery of this type of fluorite, the current beneficiation technology is quite mature. However, some fluorite deposits contain a large amount of dolomite minerals. It is difficult to separate this type of fluorite minerals. On the one hand, the calcium ions in dolomite minerals are similar to those in fluorite minerals. On the other hand, dolomite minerals The activity of magnesium ions in minerals is very strong, coupled with the interference of other impurity minerals, resulting in difficulty in flotation separation; and because other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D101/06
Inventor 魏宗武
Owner GUANGXI UNIV
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