CN109894268B - Beneficiation method for tailing discarding and refining of wolframite - Google Patents

Abstract

The invention discloses a beneficiation method for tailing discarding and refining of wolframite, which aims to solve the technical problems of high labor cost and low labor operation efficiency of the conventional beneficiation method of the wolframite; the method comprises the following steps: a section of crushing and grading operation is adopted to meet the requirement of the grade of tailing discarding operation in the subsequent stage; separating metal-containing minerals and non-metal minerals by adopting an X-ray intelligent concentrator, and realizing large yield direct tailing discarding of 6-50mm thick size fraction minerals; then, a high-pressure roller mill is adopted to crush the ores until the granularity is below 6.0 mm; and then coarse particle ultrahigh field intensity vertical ring high gradient magnetic separator is used for coarse scanning and sorting operation, and the ultrastrong magnetic force of the ultrahigh field intensity vertical ring high gradient magnetic separator is utilized to effectively recover the weakly magnetic wolframite and further realize direct tailing discarding of coarse particle minerals. The method can directly discard the coarse fraction minerals, and can greatly reduce the burden of subsequent operation, thereby greatly reducing the beneficiation cost of the wolframite and realizing low energy consumption and high efficiency recovery of the wolframite.

Description

Beneficiation method for tailing discarding and refining of wolframite

Technical Field

The invention belongs to the technical field of wolframite beneficiation, particularly relates to a beneficiation method for tailing discarding and refining of wolframite, and particularly relates to a combined separation operation method of an X-ray intelligent concentrator and a coarse particle ultrahigh field intensity vertical ring high gradient magnetic separator.

Background

The wolframite is the most main ore for extracting tungsten, and is also called wolframite, and because the wolframite contains iron tungstate and manganese tungstate with different proportions, if the iron content is high, the wolframite is called, and if the manganese content is high, the wolframite is called; the wolframite is brown to black, has metallic or semimetallic luster, and is generally produced in granite and quartz ores with tin ore

Aiming at the mining process of the conventional wolframite, the traditional separation process of the wolframite mainly comprises ore crushing and grading, manual hand-selection and tail-throwing, ore grinding and gravity separation, and although the process method is simple, a large amount of labor force is required, and the labor operation efficiency is low; meanwhile, because the existing wolframite beneficiation is limited by the inherent method, the manual participation is difficult to eliminate, and the manual beneficiation and the mechanical equipment are combined for carrying out, but with the gradual increase of the existing labor cost, the exploitation of the wolframite mine by the existing method is also challenged by high cost, so that a better and efficient process method for treating the wolframite is urgently researched.

Disclosure of Invention

(1) Technical problem to be solved

Aiming at the defects of the prior art, the invention aims to provide a beneficiation method for tailing discarding and refining of wolframite, which aims to solve the technical problems of high labor cost and low labor operation efficiency of the conventional beneficiation method of the wolframite; the beneficiation method can directly discard the coarse fraction minerals, and can greatly reduce the burden of subsequent operation, thereby greatly reducing the beneficiation cost of the wolframite and realizing low-energy-consumption and high-efficiency recovery of the wolframite.

(2) Technical scheme

In order to solve the technical problem, the invention provides a tailing discarding and refining beneficiation method for wolframite, which comprises the following specific steps:

step one, crushing-grading operation; crushing the raw wolframite ore with the grain size of 0-350mm by a one-section jaw crusher to obtain raw wolframite ore with the grain size of-50 mm, washing and grading the raw wolframite ore by using a double-layer vibrating screen to respectively obtain minerals with two grain sizes of +6.0-50mm and-6.0 mm, and returning the minerals with the grain size of +50mm to the jaw crusher for crushing;

step two, sorting operation of an X-ray intelligent concentrator; performing a coarse scanning separation on the minerals with the particle size fraction of +6.0-50mm by an X-ray intelligent concentrator, and separating the metal-containing part from the non-metal-containing part to obtain No. 1 black tungsten rough concentrate;

in the step, the metal-containing part is separated from the non-metal-containing part, so that the wolframite is effectively enriched, the metal-free part obtained in the step is a first part of tailings, and the first part of tailings can be piled as building materials to realize the tailing discarding of the minerals with the size fraction of +6.0-50 mm.

Step three, ore crushing operation of the high-pressure roller mill; crushing the No. 1 wolframine rough concentrate by a high-pressure roller mill to make the wolframine rough concentrate reach a grade of-6.0 mm;

by this step, the minerals are further dissociated.

Step four, coarse particle ultrahigh field intensity vertical ring high gradient magnetic separator coarse scanning and sorting operation; mixing the-6.0 mm size fraction fine ore obtained in the third step with the-6.0 mm size fraction mineral obtained in the first step, performing one-coarse-scanning two-stage magnetic separation by using a coarse-particle ultrahigh-field-intensity vertical-loop high-gradient magnetic separator, and controlling the background field intensity to be more than 1.5T to obtain a 2# wolframite coarse concentrate as a magnetic product;

through the step, wolframite is further enriched, and the obtained nonmagnetic product is a second part of tailings; the step utilizes the super strong magnetic force of the ultra-high field intensity vertical ring high gradient magnetic separator, can effectively recover the weakly magnetic wolframite, further realizes the direct tailing discarding of coarse-grained minerals, finishes the tailing discarding of coarse-grained level of-6.0 mm grade, and recycles all tailing products as the infrastructure materials.

Step five, grinding and grading operation; grinding the 2# wolframite rough concentrate by a rod mill to ensure that the mineral granularity reaches-0.15 mm and the particle size accounts for more than 90 percent, thus obtaining the intermediate mineral product of the wolframite.

In the step, the 2# wolframite rough concentrate is ground by a rod mill, and can be graded by a high-frequency sieve to form closed circuit grinding ore; meanwhile, the granularity of the minerals reaches-0.15 mm and accounts for more than 90 percent through the step, so that most of the minerals are completely dissociated, qualified size fractions are obtained for subsequent gravity flotation operation, and subsequent favorable conditions are created.

(3) Advantageous effects

Compared with the traditional wolframite beneficiation method, the technical scheme of the invention has the beneficial effects that:

1. the technical scheme of the invention can easily realize the direct tailing discarding of large yield of 6-50mm coarse size fraction minerals, greatly reduce the burden of subsequent operation and greatly reduce the energy consumption of the subsequent ore crushing operation;

2. the technical scheme of the invention utilizes the super strong magnetic force of the super high field intensity vertical ring high gradient magnetic separator, can effectively recover the weak magnetic wolframite, further realizes the direct tailing discarding of coarse-grained minerals, finishes the tailing discarding of coarse-grained level of-6.0 mm grade, and recycles all tailing products as the construction materials;

3. the technical scheme of the invention fully utilizes the characteristics of metal photoelectric property and weak magnetism of the wolframite, the synthetic property of the wolframite and the like, and realizes the low-energy-consumption and high-efficiency recovery of the wolframite;

4. the technical scheme of the invention has the advantages of simple process, easy operation and low energy consumption, is suitable for large-scale industrial production and has wide application prospect.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood and obvious, the technical solutions in the embodiments of the present invention are clearly and completely described below to further illustrate the invention, and obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments.

The specific implementation mode is that the wolframite tailing discarding and concentrate extracting ore dressing scheme created by the invention is utilized to carry out wolframite separation in a wolframite mine in the south, the wolframite mine treats 2000 tons of raw wolframite daily, the tungsten grade of the raw ore is about 0.31 percent, and the specific steps are as follows:

A. crushing-grading operation; the grade of the raw wolframite ore is 0-350mm, the raw wolframite ore with the grade of-50 mm is obtained through crushing operation of a section of jaw crusher, then double-layer vibrating screen is adopted to wash the ore for grading, and the raw ore with the grade of +50mm is returned and crushed again to obtain the raw ore with the grade of +6.0-50mm and the raw ore with the grade of-6.0 mm and the raw ore with the grade of 17.17 percent;

B. sorting operation of an X-ray intelligent concentrator; raw ores with the size fraction of +6.0-50mm are subjected to primary coarse scanning separation operation of an X-ray intelligent concentrator, metal-containing minerals and non-metal minerals are separated, the yield of 1# wolframite coarse concentrate is 16.31%, the grade of 1# wolframite coarse concentrate is 1.382%, and wolframite is effectively enriched; the yield of the obtained first part of tailings is 66.52%, the grade of the black tungsten tailings is 0.031%, and the first part of tailings is stockpiled as a base building material, so that the high-yield tailing discarding of the minerals with the +6.0-50mm size fraction and the coarse size fraction is realized;

C. crushing the ore by using a high-pressure roller mill; and (3) crushing the 1# wolframine rough concentrate by a high-pressure roller mill, wherein the size fraction reaches-6.0 mm, and further dissociating the minerals.

D. The mixed ore of-6.0 mm grade minerals obtained by crushing operation of a high-pressure roller mill and washing and screening of crude ore is subjected to S L on-2000 coarse particle ultrahigh field intensity vertical ring high gradient magnetic separator, the background field intensity is more than 1.5T, the coarse particle ultrahigh field intensity vertical ring high gradient magnetic separator is subjected to two-stage ultrahigh field intensity magnetic separation operation of one coarse scanning, the obtained magnetic product is 18.36% of the yield of 2# wolframine rough concentrate, 1.568% of the tungsten concentrate and further enriched wolframine, the obtained nonmagnetic product is 15.12% of the yield of the second part of tailings, 0.036% of the tungsten grade of the tailings, and tailing rejection of-6.0 mm grade coarse grade minerals is realized;

E. grinding and grading; and grinding the 2# wolframine rough concentrate by a rod mill, and grading by adopting a high-frequency sieve to form closed circuit grinding operation, wherein the granularity of the mineral reaches more than 90 percent of the grade of minus 0.15mm, most of the mineral is completely dissociated, the qualified grade is obtained for the subsequent gravity flotation operation, and favorable conditions are created for the subsequent operation.

According to the production index pair of the wolframite mine separated from the wolframite processed by the traditional method, for example, in the table 1, under the condition that the grade of raw material tungsten is equivalent, the reject quantity of coarse grain size in the technical scheme of the invention is 41.77 percent higher than that of the traditional method, the labor amount is reduced by 33 people, and the unit energy consumption is saved by 415 KW; under the condition of equivalent metal recovery rate, the grinding amount of the mineral is reduced by 56.89 percent, and the tungsten grade of the ground mineral is improved by 1.152 percent; as can be seen from the data in Table 1, the index of the present invention is significantly superior to the conventional method.

TABLE 1 comparison of data for wolframite treated by two processes

Having thus described the principal technical features and basic principles of the invention, and the advantages associated therewith, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description is described in terms of various embodiments, not every embodiment includes only a single embodiment, and such descriptions are provided for clarity only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.

Claims (1)

1. The beneficiation method for tailing discarding and refining of the wolframite is characterized by comprising the following specific steps of:

step one, crushing-grading operation; crushing the raw wolframite ore with the grain size of 0-350mm by a one-section jaw crusher to obtain raw wolframite ore with the grain size of-50 mm, washing and grading the raw wolframite ore by using a double-layer vibrating screen to respectively obtain minerals with two grain sizes of +6.0-50mm and-6.0 mm, and returning the minerals with the grain size of +50mm to the jaw crusher for crushing;

step two, sorting operation of an X-ray intelligent concentrator; performing a coarse scanning separation on the minerals with the particle size fraction of +6.0-50mm by an X-ray intelligent concentrator, and separating the metal-containing part from the non-metal-containing part to obtain No. 1 black tungsten rough concentrate;

step three, ore crushing operation of the high-pressure roller mill; crushing the No. 1 wolframine rough concentrate by a high-pressure roller mill to make the wolframine rough concentrate reach a grade of-6.0 mm;

step four, coarse particle ultrahigh field intensity vertical ring high gradient magnetic separator coarse scanning and sorting operation; mixing the-6.0 mm size fraction fine ore obtained in the third step with the-6.0 mm size fraction mineral obtained in the first step, performing one-coarse-scanning two-stage magnetic separation by using a coarse-particle ultrahigh-field-intensity vertical-loop high-gradient magnetic separator, and controlling the background field intensity to be more than 1.5T to obtain a 2# wolframite coarse concentrate as a magnetic product;

step five, grinding and grading operation; grinding the 2# wolframite rough concentrate by a rod mill to ensure that the mineral granularity reaches-0.15 mm and the particle size accounts for more than 90 percent, thus obtaining the intermediate mineral product of the wolframite.