阅读说明：本技术 一种提高萤石精矿品位的方法 (Method for improving fluorite concentrate grade ) 是由 苏晓兰 王潇 祝景龙 李�浩 徐花婷 于 2019-09-11 设计创作，主要内容包括：本发明公开了一种提高萤石精矿品位的方法,包括：向磨矿后的萤石矿中添加调整剂得到第一萤石矿浆；向所述第一萤石矿浆中添加抑制剂、活化剂和捕收剂得到第二萤石矿浆和第一次尾矿；对所述第二萤石矿浆进行磨矿处理得到第三萤石矿浆；向所述第三萤石矿浆中加入抑制剂、活化剂和捕收剂得到第四萤石矿浆和第二次尾矿；向所述第四萤石矿浆中添加抑制剂得到萤石精矿。本发明所提供的方法通过调整剂对矿浆的pH值进行调整,之后通过抑制剂、活化剂和捕收剂的添加对萤石矿进行多次精选和扫选后,提高了萤石精矿的品位,降低了萤石矿的杂质含量,同时又能消除生产中中矿循环量大、分离效益低、浮选不稳定的问题。(The invention discloses a method for improving the grade of fluorite concentrate, which comprises the following steps: adding a regulator into the grinded fluorite ore to obtain first fluorite ore pulp; adding an inhibitor, an activator and a collector into the first fluorite pulp to obtain second fluorite pulp and first tailings; grinding the second fluorite pulp to obtain third fluorite pulp; adding an inhibitor, an activator and a collector into the third fluorite pulp to obtain fourth fluorite pulp and second tailings; and adding an inhibitor into the fourth fluorite pulp to obtain fluorite concentrate. According to the method provided by the invention, the pH value of the ore pulp is adjusted through the adjusting agent, and then the fluorite ore is subjected to multiple concentration and scavenging through the addition of the inhibitor, the activating agent and the collecting agent, so that the grade of the fluorite concentrate is improved, the impurity content of the fluorite ore is reduced, and the problems of large recycling amount of middlings, low separation benefit and unstable flotation in production can be solved.)

1. A method of upgrading a fluorite concentrate, comprising:

adding a regulator into the grinded fluorite ore to obtain first fluorite ore pulp;

adding an inhibitor, an activator and a collector into the first fluorite pulp to obtain second fluorite pulp and first tailings;

grinding the second fluorite pulp to obtain third fluorite pulp;

adding an inhibitor, an activator and a collector into the third fluorite pulp to obtain fourth fluorite pulp and second tailings;

and adding an inhibitor into the fourth fluorite pulp to obtain fluorite concentrate.

2. The method for upgrading a fluorite concentrate according to claim 1, wherein said first fluorite pulp has a pH of 7-7.5.

3. The method of upgrading a fluorite concentrate according to claim 2, wherein said modifier is sodium carbonate and the total amount of said modifier is between 0 and 3000 g/t.

4. The method of upgrading a fluorite concentrate according to claim 1, wherein adding an inhibitor, an activator and a collector to the first fluorite pulp results in a second fluorite pulp and a first tailings comprising:

and adding an inhibitor, an activator and a collector into the first fluorite pulp in sequence to perform flotation roughing and twice scavenging to obtain second fluorite pulp and first tailings.

5. The method of claim 1, wherein the activator added to the first fluorite pulp is a mixture of aluminum sulfate and water glass in a total amount of 0-2000 g/t.

6. The method for upgrading of fluorite concentrate according to claim 1, characterized in that the inhibitor added in the first fluorite pulp is at least one of water glass and tannin extract, and the total dosage is 100-2000 g/t.

7. The method for upgrading the fluorite concentrate according to claim 1, wherein the collector added to the first fluorite pulp is at least one of oleic acid or saponified oleic acid, and the total amount is 100-1000 g/t.

8. The method of upgrading a fluorite concentrate according to claim 1, wherein adding an inhibitor, an activator and a collector to the third fluorite pulp results in a fourth fluorite pulp and a second tailings comprising:

and adding an inhibitor, an activator and a collector into the third fluorite pulp to carry out primary concentration and primary fine scavenging to obtain the fourth fluorite pulp and the second tailings.

9. The method of upgrading a fluorite concentrate according to claim 1, wherein adding an inhibitor to said fourth fluorite pulp results in a fluorite concentrate comprising:

and adding an inhibitor into the fourth fluorite pulp to carry out concentration for seven times to obtain fluorite concentrate.

10. The method of upgrading a fluorite concentrate according to claim 9, wherein the step of adding an inhibitor to the fourth fluorite pulp for eight beneficiating operations produces a fluorite concentrate comprising:

adding an inhibitor into the fourth fluorite pulp for four times of concentration to obtain fifth fluorite pulp;

and adding an inhibitor into the fifth fluorite pulp for carrying out concentration for three times to obtain fluorite concentrate.

Technical Field

The invention belongs to the technical field of minerals, and particularly relates to a method for improving the grade of fluorite concentrate.

Background

With the development of economy, as an important strategic resource, the development and utilization prospect of fluorite is very wide, and on the other hand, a huge gap exists between the supply and the demand of the fluorite resource in China. And the easy-to-find outcrop ore, shallow ore and known ore are gradually reduced, so that the difficulty of searching the ore is increased continuously.

At present, fluorite ore containing fluorine is the only raw material for producing hydrofluoric acid and is also the basic raw material of industries such as steel, aluminum, glass and the like. There are three main types of fluorite ore in nature, namely quartz-fluorite type, quartz-fluorite-barite type, and quartz-fluorite-calcite type (or quartz-fluorite-carbonate type). Among them, calcite-type fluorite ore has been a difficult problem in mineral dressing technology because both calcite and fluorite crystal lattices contain Ca²⁺And the physical and chemical properties of the two mineral surfaces are similar, and the action of the collector and the inhibitor acting on the two mineral surfaces is also similar, so that the separation of calcite and fluorite is realized with considerable difficulty. Generally, the grade of the high-calcium fluorite ore is difficult to be improved.

For high-calcium fluorite ore (such as calcium carbonate-fluorite ore), the prior art generally adopts a separation method for inhibiting calcite by floating fluorite, and because the fluorite ore and the calcium carbonate have similar surface physical and chemical properties and similar dissolution properties, the problems of large recycling amount of middlings, poor separation effect, large selection operation times, low grade of fluorite concentrate, overproof impurities in the fluorite concentrate, low recovery rate and the like are easily caused.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a method for improving the grade of fluorite concentrate. The technical problem to be solved by the invention is realized by the following technical scheme:

a method of upgrading a fluorite concentrate comprising:

adding a regulator into the grinded fluorite ore to obtain first fluorite ore pulp;

adding an inhibitor, an activator and a collector into the first fluorite pulp to obtain second fluorite pulp and first tailings;

grinding the second fluorite pulp to obtain third fluorite pulp;

adding an inhibitor, an activator and a collector into the third fluorite pulp to obtain fourth fluorite pulp and second tailings;

and adding an inhibitor into the fourth fluorite pulp to obtain fluorite concentrate.

In one embodiment of the invention, the first fluorite pulp has a pH of 7-7.5.

In one embodiment of the invention, the modifier is sodium carbonate, and the total dosage of the modifier is 0-3000g/t raw ore.

In one embodiment of the invention, adding an inhibitor, an activator and a collector to the first fluorite pulp in sequence to obtain a second fluorite pulp and a first tailings, comprises:

and adding an inhibitor, an activator and a collector into the first fluorite pulp in sequence to perform flotation roughing and twice scavenging to obtain second fluorite pulp and first tailings.

In one embodiment of the invention, the activator added to the first fluorite pulp is a mixture of aluminum sulfate and water glass, and the total dosage is 0-2000g/t raw ore.

In one embodiment of the invention, the inhibitor added in the first fluorite ore pulp is at least one of water glass and tannin extract, and the total dosage is 100-2000g/t raw ore.

In one embodiment of the invention, the collector in the first fluorite ore pulp is at least one of oleic acid or saponified oleic acid, and the total dosage is 100-1000g/t raw ore.

In one embodiment of the invention, adding an inhibitor, an activator and a collector to the third fluorite pulp in sequence to obtain a fourth fluorite pulp and a second tailing, comprises:

and adding an inhibitor, an activator and a collector into the third fluorite pulp in sequence to carry out concentration and primary fine scavenging, and obtaining the fourth fluorite pulp and the secondary tailings.

In one embodiment of the invention, adding an inhibitor to the fourth fluorite pulp results in a fluorite concentrate comprising:

and adding an inhibitor into the fourth fluorite pulp to carry out concentration for seven times to obtain fluorite concentrate.

In one embodiment of the invention, the addition of an inhibitor to the fourth fluorite pulp for eight beneficiations results in a fluorite concentrate comprising:

adding an inhibitor into the fourth fluorite pulp for four times of concentration to obtain fifth fluorite pulp;

and adding an inhibitor into the fifth fluorite pulp for carrying out concentration for three times to obtain fluorite concentrate.

The invention has the beneficial effects that:

according to the method provided by the invention, the pH value of the ore pulp is adjusted through the adjusting agent, and then the fluorite ore is subjected to multiple concentration and scavenging through the addition of the inhibitor, the activating agent and the collecting agent, so that the grade of the fluorite concentrate is improved, the impurity content of the fluorite ore is reduced, and the problems of large recycling amount of middlings, low separation benefit and unstable flotation in production can be solved.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic flow chart of a method for improving the grade of fluorite concentrate according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.