Preparation method and application of dolomite inhibitor

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...

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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