Preparation method and application of fluorite mineral flotation inhibitor

Abstract

The invention discloses a preparation method and application of a fluorite mineral flotation inhibitor, and belongs to the technical field of mineral processing, the preparation method comprises the following steps: mixing raw materials, and carrying out ball milling reaction to obtain the fluorite mineral flotation inhibitor. According to the preparation method and application of the fluorite mineral flotation depressing agent, the prepared flotation depressing agent has selective adsorbability, the surface property of minerals can be modulated, and effective flotation separation of the minerals is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mineral processing, and in particular to a preparation method and application of a fluorite mineral flotation inhibitor. Background Art

[0002] Fluorite is an important strategic mineral resource and the main raw material of the fluorine chemical industry. It is widely used in building materials, aerospace and other fields. my country is rich in fluorite resources, mainly carbonate resources. The ore is rich in calcite and other calcium-containing gangue minerals, which are generally closely associated with fluorite. Calcite and fluorite have Ca on their mineral surfaces. 2+ The active sites of minerals are similar in floatability and have good hydrophobicity in the presence of fatty acid collectors. In addition, ions on the mineral surface are mutually transformed, making flotation separation difficult.

[0003] Sodium silicate is commonly used as a calcite inhibitor in industry, but the dosage of sodium silicate is difficult to control. A small amount can easily lead to poor inhibition effect, while an excessive amount can cause the target mineral to be inhibited, and the mineral processing wastewater is difficult to settle. Therefore, the mineral processing field has gradually carried out research on the modification of sodium silicate, such as acidification of sodium silicate and mixing with metal ions, which have shown better inhibition performance, but the impact of inorganic inhibitors on the environment is difficult to effectively solve, and mineral processing wastewater is difficult to recycle. Based on this, many scholars have carried out research on organic inhibitors as inhibitors of calcium-containing gangue minerals, all of which have shown good inhibition effects. It can be seen that the use of new organic inhibitors is of great significance for the flotation separation of fluorite and calcite. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing a fluorite mineral flotation depressant and its application. The prepared flotation depressant has selective adsorption, can adjust the surface properties of the mineral, and achieve effective flotation separation of the mineral.

[0005] To achieve the above object, the present invention provides a method for preparing a fluorite mineral flotation inhibitor, comprising the following steps: mixing raw materials and performing ball milling reaction to obtain the fluorite mineral flotation inhibitor.

[0006] Preferably, the raw materials include deionized water, tannic acid and ferric chloride.

[0007] Preferably, the mass ratio of deionized water, tannic acid and ferric chloride is 0.01-0.03:1:0.01-0.03.

[0008] Preferably, the rotation speed of the ball milling reaction is 10-500 r / min, and the ball milling time is 5-30 min.

[0009] The present invention provides an application of a fluorite mineral flotation inhibitor. The flotation inhibitor prepared by the above-mentioned method for preparing a fluorite mineral flotation inhibitor is applied to the flotation of calcite and fluorite.

[0010] Preferably, the application includes the following steps: grinding the fluorite ore containing calcite gangue minerals, feeding it into a flotation machine and stirring it for slurry preparation, then adjusting the pH and stirring it, then adding a flotation depressant and stirring it, and finally adding a collector sodium oleate and stirring it, and then aerating and scraping bubbles.

[0011] Preferably, the stirring and slurrying time is 1-3 minutes, the stirring time is 1-3 minutes after the pH is adjusted, the stirring time is 3-5 minutes after the flotation depressant is added, and the stirring time is 3-5 minutes after the sodium oleate is added.

[0012] Preferably, the solution for adjusting pH is one or more of HCl, NaOH and Na2CO3, and the pH is adjusted to ≥6.

[0013] Preferably, the concentration of the flotation depressant is ≥10 mg / L, and the dosage of sodium oleate is 10-100 mg / L.

[0014] Therefore, the present invention adopts the above-mentioned preparation method and application of a fluorite mineral flotation inhibitor, which has the following beneficial effects: (1) It has a strong inhibitory ability on gangue minerals such as calcite, which is beneficial to improving the grade and recovery rate of fluorite flotation concentrate, shortening the flotation process, and improving the comprehensive utilization of resources.

[0015] (2) The prepared flotation depressant has selective adsorption and can adjust the surface properties of minerals to achieve effective flotation separation of minerals.

[0016] (3) Compared with other inhibitors, it has the advantages of being environmentally friendly, widely available, low-priced, and having obvious effects.

[0017] (4) The preparation method is simple and the properties are controllable.

[0018] The technical solution of the present invention is further described in detail below through embodiments. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further illustrated by the following examples.

[0020] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0021] The invention provides a method for preparing a fluorite mineral flotation inhibitor, comprising the following steps: mixing raw materials, and performing ball milling reaction to obtain a fluorite mineral flotation inhibitor. Tannic acid and iron ions are reacted in advance, and tannic acid molecules are preferentially adsorbed on the surface of calcite under the synergistic effect of iron ions, thereby inhibiting the adsorption of collector sodium oleate molecules, and achieving selective flotation separation of fluorite and calcite.

[0022] The raw materials include deionized water, tannic acid and ferric chloride, the mass ratio of the deionized water, tannic acid and ferric chloride is 0.01-0.03:1:0.01-0.03, the rotation speed of the ball milling reaction is 10-500r / min, and the ball milling time is 5-30min.

[0023] Tannic acid is found in the bark and wood of plants such as oak, oak, and walnut. Many fruits and nuts are also rich in tannic acid. For example, grapes, apples, citrus fruits, berries, walnuts, almonds, and chestnuts. Legumes such as soybeans and black beans also contain tannic acid. These compounds play an antioxidant and protective role in legumes. In addition, certain grains such as barley, corn, and wheat also contain a certain amount of tannic acid. Tannic acid is widely available and inexpensive, which is more conducive to production.

[0024] The invention provides an application of a fluorite mineral flotation inhibitor. The flotation inhibitor prepared by the above-mentioned method for preparing a fluorite mineral flotation inhibitor is applied to the flotation of calcite and fluorite, comprising the following steps: grinding fluorite ore containing calcite gangue minerals, feeding into a flotation machine and stirring and slurrying for 1-3 minutes, then using one or more of HCl, NaOH and Na2CO3 to adjust the pH value to ≥6 and stirring for 1-3 minutes, then adding a flotation inhibitor and stirring for 3-5 minutes, wherein the concentration of the flotation inhibitor is ≥10 mg / L, finally adding a collector sodium oleate and stirring for 3-5 minutes, wherein the amount of sodium oleate is 10-100 mg / L, and then aerating and scraping bubbles.

[0025] Example 1 The invention provides a method for preparing a fluorite mineral flotation inhibitor, comprising the following steps: mixing raw materials and performing ball milling reaction to obtain the fluorite mineral flotation inhibitor.

[0026] The raw materials include deionized water, tannic acid and ferric chloride, the mass ratio of deionized water, tannic acid and ferric chloride is 0.01:1:0.01, the rotation speed of the ball milling reaction is 10r / min, and the ball milling time is 5min.

[0027] The flotation inhibitor prepared by the above-mentioned method for preparing a fluorite mineral flotation inhibitor is applied to the flotation of calcite and fluorite, comprising the following steps: grinding the fluorite ore containing calcite gangue minerals, feeding it into a flotation machine and stirring and slurrying for 1 minute, then adjusting the pH to 6 with HCl and stirring for 1 minute, then adding a flotation inhibitor and stirring for 3 minutes, the concentration of the flotation inhibitor is 10 mg / L, finally adding a collector sodium oleate and stirring for 3 minutes, the amount of sodium oleate is 10 mg / L, and then aerating and scraping bubbles, the recovery rates of fluorite and calcite are 85.3% and 36.5%, respectively.

[0028] Example 2 The invention provides a method for preparing a fluorite mineral flotation inhibitor, comprising the following steps: mixing raw materials and performing ball milling reaction to obtain the fluorite mineral flotation inhibitor.

[0029] The raw materials include deionized water, tannic acid and ferric chloride, the mass ratio of deionized water, tannic acid and ferric chloride is 0.02:1:0.02, the rotation speed of the ball milling reaction is 200r / min, and the ball milling time is 20min.

[0030] The flotation inhibitor prepared by the above-mentioned preparation method of a fluorite mineral flotation inhibitor is applied to the flotation of calcite and fluorite, comprising the following steps: grinding the fluorite ore containing calcite gangue minerals, feeding it into a flotation machine and stirring and slurrying for 2 minutes, then using NaOH to adjust the pH to 8 and stirring for 2 minutes, then adding a flotation inhibitor and stirring for 4 minutes, the flotation inhibitor concentration is 40 mg / L, finally adding a collector sodium oleate and stirring for 4 minutes, the amount of sodium oleate is 50 mg / L, and then aerating and scraping bubbles, the recovery rates of fluorite and calcite are 95.2% and 7.1%, respectively.

[0031] Example 3 The invention provides a method for preparing a fluorite mineral flotation inhibitor, comprising the following steps: mixing raw materials and performing ball milling reaction to obtain the fluorite mineral flotation inhibitor.

[0032] The raw materials include deionized water, tannic acid and ferric chloride, the mass ratio of deionized water, tannic acid and ferric chloride is 0.03:1:0.03, the rotation speed of the ball milling reaction is 500r / min, and the ball milling time is 30min.

[0033] The flotation inhibitor prepared by the above-mentioned preparation method of a fluorite mineral flotation inhibitor is applied to the flotation of calcite and fluorite, comprising the following steps: grinding the fluorite ore containing calcite gangue minerals, feeding it into a flotation machine and stirring and slurrying for 3 minutes, then using NaOH to adjust the pH to 10 and stirring for 3 minutes, then adding a flotation inhibitor and stirring for 5 minutes, the flotation inhibitor concentration is 50 mg / L, finally adding a collector sodium oleate and stirring for 5 minutes, the amount of sodium oleate is 100 mg / L, and then aerating and scraping bubbles, the recovery rates of fluorite and calcite are 87.2% and 15.1%, respectively.

[0034] Therefore, the present invention adopts the above-mentioned preparation method and application of a fluorite mineral flotation depressant, and the prepared flotation depressant has selective adsorption, can adjust the surface properties of the mineral, and achieve effective flotation separation of the mineral.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for preparing a fluorite mineral flotation depressant, characterized in that: The following steps are involved: The raw materials are mixed and subjected to ball milling reaction to obtain a fluorite mineral flotation inhibitor.

2. The method for preparing a fluorite mineral flotation depressant according to claim 1, characterized in that: The raw materials include deionized water, tannic acid and ferric chloride.

3. The method for preparing a fluorite mineral flotation depressant according to claim 1, characterized in that: The mass ratio of deionized water, tannic acid and ferric chloride is 0.01-0.03:1:0.01-0.

03.

4. The method for preparing a fluorite mineral flotation depressant according to claim 1, characterized in that: The rotation speed of the ball milling reaction is 10-500r / min, and the ball milling time is 5-30min.

5. An application of a fluorite mineral flotation depressant, characterized in that: The flotation depressant prepared by the method for preparing a fluorite mineral flotation depressant according to any one of claims 1 to 4 is applied to the flotation of calcite and fluorite.

6. The use of a fluorite mineral flotation depressant according to claim 5, characterized in that: The application consists of the following steps: The fluorite ore containing calcite gangue minerals is ground, fed into the flotation machine and stirred to prepare the slurry, then the pH is adjusted and stirred, and then the flotation inhibitor is added and stirred, and finally the collector sodium oleate is added and stirred, and then aerated and scraped.

7. The use of a fluorite mineral flotation depressant according to claim 6, characterized in that: The stirring and slurrying time is 1-3 minutes, stirring for 1-3 minutes after adjusting the pH, stirring for 3-5 minutes after adding the flotation inhibitor, and stirring for 3-5 minutes after adding sodium oleate.

8. The use of a fluorite mineral flotation depressant according to claim 6, characterized in that: The solution for adjusting pH is one or more of HCl, NaOH and Na2CO3, and the pH is adjusted to ≥6.

9. The use of a fluorite mineral flotation depressant according to claim 6, characterized in that: The concentration of flotation inhibitor is ≥10 mg / L, and the dosage of sodium oleate is 10-100 mg / L.