CN109013047B - Beneficiation method for sorting rare metal concentrate and quartz feldspar concentrate - Google Patents
Beneficiation method for sorting rare metal concentrate and quartz feldspar concentrate Download PDFInfo
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Abstract
The invention relates to a beneficiation method for separating rare metal concentrate and quartz feldspar concentrate, which comprises the steps of firstly carrying out table reselection on polymetallic ore to respectively obtain gravity concentrate, gravity inferior concentrate, gravity middling and gravity tailings; performing strong magnetic separation on the gravity concentrate to obtain strong magnetic separation concentrate and strong magnetic separation tailings, wherein the strong magnetic separation concentrate is rare multi-metal bulk concentrate containing uranium, niobium, beryllium, rare earth and titanium, and the strong magnetic separation tailings are zirconium concentrate; and (3) carrying out strong magnetic separation on the gravity middlings to obtain strong magnetic separation concentrate and strong magnetic separation tailings, wherein the strong magnetic separation tailings are quartz feldspar concentrate. The method can not only remarkably improve the recovery rate of rare metal minerals of the polymetallic ore to more than 70 percent, but also can recover the quartz feldspar which is originally the tailings in the form of concentrate products, thereby greatly improving the resource utilization rate, and the method does not add any mineral dressing agent and has remarkable economic and environmental benefits.
Description
Technical Field
The invention belongs to the technical field of mineral separation, and particularly relates to a mineral separation method for separating rare metal concentrate and quartz feldspar concentrate.
Background
China develops from the present stage to developed countries, and a large amount of resources are needed for supporting, particularly rare metal mineral resources, so that the development and utilization of lean ore and complex ore resources in China are increased, and the method is a basis for expanding the mineral resources in China and promoting the development of the recycling economy of the mining industry.
Taking a complex multi-metal ore as an example, the complex multi-metal ore contains various rare metal resources such as uranium, niobium, tantalum, rare earth, beryllium, zirconium and the like, the mineral composition is complex, the content of rare metal elements is low, the development difficulty is high, and the development and utilization of the multi-metal ore cannot be realized after more than 40 years of research. The main reason is that the polymetallic ore is rich in valuable elements, including more than 20 industrially utilizable elements such as uranium, niobium, tantalum, rare earth, beryllium, zirconium and the like, and the occurrence states of the elements are dispersed, so that the valuable elements in various minerals are seriously contained, and the beneficiation cannot obtain single and high-grade rare metal concentrate. In conclusion of mineral separation research results in recent 40 years, the purposes of obtaining three products of rare earth concentrate, niobium concentrate and zirconium concentrate are all taken as targets, but the three products have the problems of low grade and low recovery rate, and the tailing amount is large and accounts for 90% of the original ore.
In addition, the thorium and uranium in the polymetallic ore are high in content, the polymetallic ore belongs to radioactive ore, if the traditional ore dressing process for obtaining the three concentrate products is adopted, the radioactivity of the concentrate and tailings exceeds the standard, and the emission of a large amount of radioactive tailings can cause potential environmental and safety hazards. In fact, the most important minerals in the tailings are quartz and feldspar, the total content is 90% of the amount of the tailings, and if the recovery of the quartz and feldspar in the tailings is realized, the discharge amount of the tailings is greatly reduced.
Therefore, the method realizes the complete recovery of the rare metal elements such as uranium, niobium, zirconium, beryllium, rare earth, titanium and the like in the polymetallic ores, realizes the recovery and utilization of quartz and feldspar in tailings, completely extracts valuable resources of the polymetallic ores, and is a key core problem for the development and utilization of the polymetallic ores.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a beneficiation method for separating rare metal concentrate and quartz feldspar concentrate. The method can simultaneously obtain three mineral products, namely rare multi-metal bulk concentrate containing uranium, niobium, beryllium, rare earth and titanium, zirconium concentrate and quartz feldspar concentrate from the multi-metal ores.
The technical scheme adopted by the invention is as follows:
a beneficiation method for sorting rare metal concentrate and quartz feldspar concentrate comprises the following steps:
(1) taking the grinded polymetallic ore, and performing primary table reselection to obtain primary reselected concentrate and primary reselected tailings;
(2) grinding the gravity tailings obtained in the step (1), and performing secondary table concentrator gravity separation on the gravity tailings after grinding to obtain secondary gravity concentrate, secondary gravity secondary concentrate, secondary gravity middling and secondary gravity tailings;
(3) grinding the second-stage reselected middlings in the step (2), and performing third-stage table reselection on the ground second-stage reselected middlings to obtain third-stage reselected concentrates, third-stage reselected secondary concentrates, third-stage reselected middlings and third-stage reselected tailings;
(4) performing strong magnetic roughing on the three-stage gravity middlings in the step (3) to obtain roughed concentrate and roughed tailings; performing strong magnetic scavenging on the roughing tailings to obtain scavenged concentrate and scavenged tailings, wherein the scavenged tailings are quartz feldspar concentrate;
(5) merging the rougher concentrate and the scavenging concentrate in the step (4) with the secondary reselected concentrate and the secondary reselected tailings in the step (2), grinding, and then performing four-section table concentrator reselection to obtain four-section reselected concentrate and four-section reselected tailings;
(6) merging the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate for grinding, and then performing strong magnetic rough concentration to obtain rough concentrate and rough tailings; performing strong magnetic concentration on the rough concentration concentrate to obtain a concentrated concentrate and concentrated tailings, wherein the concentrated concentrate is rare multi-metal bulk concentrate; performing strong magnetic scavenging on the roughing tailings to obtain scavenged concentrate and scavenged tailings, wherein the scavenged tailings are zirconium concentrate; and returning the concentration tailings and the scavenging concentrate to the operation of the strong magnetic roughing process.
In the step (1), the total amount of rare metal minerals including zirconium, uranium, niobium, beryllium, rare earth and titanium in the polymetallic ore is 5-15%, and the content of quartz feldspar is 75-85%; the granularity of the grinded polymetallic ore is-0.5 mm and accounts for more than 50%.
In the step (1), the condition of the first-stage table reselection is that the ore pulp concentration is 10-30%, and the mass ratio of the first-stage reselection concentrate to the first-stage reselection tailings is 1.8-6: 94-98.2.
In the step (2), the weight percentage of the grain size of the gravity tailings after grinding is-0.1 mm and accounts for more than 70%.
In the step (2), the condition of secondary table concentrator reselection is that the ore pulp concentration is 10-30%, and the mass ratio of the secondary reselection concentrate to the secondary reselection secondary concentrate to the secondary reselection middling to the secondary reselection tailings is 1.8-5:1-15:72-88: 8-28.
In the step (3), the weight percentage of the grain size of the secondary gravity middlings after grinding is-0.05 mm and accounts for more than 70%.
In the step (3), the condition of the three-stage table concentrator reselection is that the concentration of ore pulp is 10-30%, and the mass ratio of the three-stage gravity concentrate to the three-stage gravity inferior concentrate to the three-stage gravity middling to the three-stage gravity tailings is 1-6:0.5-10:70-85: 12-28.
In the step (4), the magnetic field intensity of the strong magnetic rough concentration is 1.0-2.5T, and the magnetic field intensity of the strong magnetic scavenging is 1.0-3.5T;
the mineral purity of the quartz feldspar concentrate is not less than 94%.
In the step (5), grinding until the weight percentage of the granularity of-0.05 mm is more than 85%;
the condition of the four-stage table concentrator reselection is that the concentration of ore pulp is 10-30%, and the mass ratio of the four-stage gravity concentrate to the four-stage gravity tailings is 0.5-4: 96-99.5.
In the step (6), the ore grinding is carried out until the granularity of 0.05mm is more than 85%;
the magnetic field intensity of the strong magnetic roughing is 1.0-2.5T, the magnetic field intensity of the strong magnetic cleaning is 1.0-3.5T, and the magnetic field intensity of the strong magnetic scavenging is 1.0-3.5T;
the zirconium grade in the zirconium concentrate is not less than 60%.
The invention has the beneficial effects that:
(1) according to the invention, the table concentrator is adopted for gravity separation, four products including rare metal mixed rough concentrate, secondary concentrate, quartz feldspar mixed rough concentrate and tailings are separated from the polymetallic ore, the variety number of products produced by table concentrator gravity separation is increased, and the method obviously improves the enrichment ratio of ore dressing; specifically, the rare metal minerals and the gangue minerals with larger specific gravity are finely separated from each other according to the density and specific gravity difference of the minerals of the polymetallic ores, so that the rare metal minerals are enriched in the rare metal mixed rough concentrate, and the gangue minerals with larger specific gravity enter the secondary concentrate; the quartz feldspar mineral, the light-specific gravity gangue mineral and the fine-grained slime are finely distinguished, the quartz feldspar mineral is enriched in the quartz feldspar mixed rough concentrate, the light-specific gravity gangue mineral and the fine-grained slime enter tailings, and the functions of mineral separation and enrichment and washing and desliming are achieved.
(2) The invention can obviously improve the recovery rate of rare metal resources, and the rare metal minerals in the polymetallic ore have the same characteristic of large specific gravity, so the minerals can be completely enriched in the reselected concentrate by reselection, and after the rare metal mixed rough concentrate is separated by magnetic separation, two concentrate products of zirconium concentrate and rare polymetallic mixed concentrate are obtained, and no middling or tailings exist.
(3) According to the invention, the quartz and feldspar which are originally tailings and need to be stacked are changed into the concentrate product through ore dressing, so that waste is changed into valuable, and the resource utilization rate is obviously improved.
(4) The invention only adopts gravity separation and strong magnetic separation, does not adopt a flotation method with high cost and reagent pollution, is a clean, environment-friendly and efficient beneficiation method, has low beneficiation cost, and can recycle beneficiation backwater.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a process flow diagram of the process of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
The method takes polymetallic ore containing rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium with the total amount of 5.0 percent and quartz feldspar with the content of 85.0 percent as raw material ore, and utilizes the process method of the invention to carry out the following process steps as shown in figure 1:
(1) taking the polymetallic ore with the granularity of-0.5 mm accounting for more than 50%, and carrying out first-stage table reselection to obtain first-stage gravity concentrate and first-stage gravity tailings; the condition of the first-stage table reselection is 30%, and the mass ratio of the first-stage gravity concentrate to the first-stage gravity tailings is 2: 98;
(2) grinding the first stage reselected tailings in the step (1) until the weight percentage of the grain size of-0.1 mm is more than 80%, and performing second stage table concentrator reselection on the grinded reselected tailings to obtain second stage reselected concentrate, second stage reselected secondary concentrate, second stage reselected middling and second stage reselected tailings; the condition of secondary table concentrator reselection is that the ore pulp concentration is 20%, and the mass ratio of the secondary gravity concentrate to the secondary gravity secondary concentrate to the secondary gravity middling to the secondary gravity tailings is 1.8:1.5:80: 16.7;
(3) grinding the second-stage reselected middlings in the step (2) until the granularity is-0.05 mm, wherein the weight percentage of the size fraction is more than 80%, and performing three-stage table reselection on the ground second-stage reselected middlings to obtain three-stage reselected concentrates, three-stage reselected inferior concentrates, three-stage reselected middlings and three-stage reselected tailings; the condition of the three-stage table concentrator reselection is that the ore pulp concentration is 10%, and the mass ratio of the three-stage gravity concentrate, the three-stage gravity secondary concentrate, the three-stage gravity middling and the three-stage gravity tailings is 1.5:0.5:70: 28;
(4) performing strong magnetic roughing on the three-section gravity middlings in the step (3), wherein the magnetic field intensity of the strong magnetic roughing is 1.0T, so as to obtain roughing concentrate and roughing tailings; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 1.0T, and scavenging concentrate and scavenging tailings are obtained, wherein the scavenging tailings are quartz feldspar concentrate, the mineral purity of the quartz feldspar concentrate is 94.00%, the recovery rate is 65.40%, and the yield is 54.00%;
(5) combining the rougher concentrate and the scavenging concentrate in the step (4) with the secondary reselected concentrate and the secondary reselected tailings in the step (2), grinding until the granularity is-0.05 mm and accounts for more than 85%, and then performing four-section table concentrator reselection to obtain four-section reselected concentrate and four-section reselected tailings; the condition of the four-stage table concentrator reselection is that the ore pulp concentration is 10%, and the mass ratio of the four-stage gravity concentrate to the four-stage gravity tailings is 0.5: 99.5;
(6) merging the first stage gravity concentrate, the second stage gravity concentrate, the third stage gravity concentrate and the fourth stage gravity concentrate, grinding until the granularity is-0.05 mm and accounts for more than 85%, and then performing strong magnetic roughing, wherein the magnetic field intensity of the strong magnetic roughing is 1.0T, so as to obtain roughing concentrate and roughing tailings; carrying out strong magnetic concentration on the rough concentration concentrate, wherein the magnetic field intensity of the strong magnetic concentration is 1.0T, so as to obtain concentrated concentrate and concentrated tailings; the concentrated concentrate is rare multi-metal bulk concentrate, the purity of useful minerals in the rare multi-metal bulk concentrate is 93.60%, the recovery rate is 75.30%, and the yield is 1.20%; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 1.0T, scavenging concentrate and scavenging tailings are obtained, the scavenging tailings are zirconium concentrate, the zirconium grade in the zirconium concentrate is 62.50%, the recovery rate is 70.90%, and the yield is 3.90%; and returning the concentration tailings and the scavenging concentrate to the operation of the strong magnetic roughing process.
Example 2
The method takes polymetallic ore containing rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium with the total amount of 8.65 percent and quartz feldspar with the content of 78.30 percent as raw material ore, and utilizes the process method of the invention to carry out the following process steps:
(1) taking polymetallic ore with the granularity of-0.5 mm accounting for more than 85%, and performing first-stage table reselection to obtain first-stage gravity concentrate and first-stage gravity tailings; the condition of the first-stage table reselection is that the ore pulp concentration is 10%, and the mass ratio of the first-stage gravity concentrate to the first-stage gravity tailings is 1.8: 98.2;
(2) grinding the first stage reselected tailings in the step (1) until the weight percentage of the grain size of-0.1 mm is more than 85%, and performing second stage table concentrator reselection on the grinded reselected tailings to obtain second stage reselected concentrate, second stage reselected secondary concentrate, second stage reselected middling and second stage reselected tailings; the condition of secondary table concentrator reselection is that the ore pulp concentration is 30%, and the mass ratio of the secondary gravity concentrate to the secondary gravity secondary concentrate to the secondary gravity middling to the secondary gravity tailings is 5:15:72: 8;
(3) grinding the second-stage reselected middlings in the step (2) until the weight percentage of the size fraction with the granularity of-0.05 mm is more than 90%, and performing three-stage table reselection on the ground second-stage reselected middlings to obtain three-stage reselected concentrates, three-stage reselected inferior concentrates, three-stage reselected middlings and three-stage reselected tailings; the condition of the three-stage table concentrator reselection is that the ore pulp concentration is 20%, and the mass ratio of the three-stage gravity concentrate, the three-stage gravity secondary concentrate, the three-stage gravity middling and the three-stage gravity tailings is 3:8:70: 19;
(4) performing strong magnetic roughing on the three-section gravity middlings in the step (3), wherein the magnetic field intensity of the strong magnetic roughing is 2.5T, so as to obtain roughing concentrate and roughing tailings; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.5T, and scavenging concentrate and scavenging tailings are obtained, wherein the scavenging tailings are quartz feldspar concentrate, the mineral purity of the quartz feldspar concentrate is 97.25%, the recovery rate is 62.35%, and the yield is 50.20%;
(5) combining the rougher concentrate and the scavenging concentrate in the step (4) with the secondary reselected concentrate and the secondary reselected tailings in the step (2), grinding until the granularity is-0.05 mm and accounts for more than 85%, and then performing four-section table concentrator reselection to obtain four-section reselected concentrate and four-section reselected tailings; the condition of the four-stage table concentrator reselection is that the ore pulp concentration is 10%, and the mass ratio of the four-stage gravity concentrate to the four-stage gravity tailings is 0.5: 99.5;
(6) merging the first stage gravity concentrate, the second stage gravity concentrate, the third stage gravity concentrate and the fourth stage gravity concentrate, grinding until the granularity is-0.05 mm and accounts for more than 85%, and then performing strong magnetic roughing, wherein the magnetic field intensity of the strong magnetic roughing is 2.5T, so as to obtain roughing concentrate and roughing tailings; carrying out strong magnetic concentration on the rough concentration concentrate, wherein the magnetic field intensity of the strong magnetic concentration is 3.5T, so as to obtain concentrated concentrate and concentrated tailings; the concentrated concentrate is rare multi-metal bulk concentrate, the purity of useful minerals in the rare multi-metal bulk concentrate is 92.50%, the recovery rate is 71.88%, and the yield is 2.01%; performing strong magnetic scavenging on the roughed tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.5T, scavenging concentrate and scavenged tailings are obtained, the scavenged tailings are zirconium concentrate, the zirconium grade in the zirconium concentrate is 60.00%, the recovery rate is 71.58%, and the yield is 7.05%; and returning the concentration tailings and the scavenging concentrate to the operation of the strong magnetic roughing process.
Example 3
The method takes the polymetallic ore containing rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium with the total amount of 10.25 percent and quartz feldspar with the content of 82.67 percent as the raw material ore, and utilizes the process method of the invention to carry out the following process steps:
(1) taking polymetallic ore with the granularity of-0.5 mm accounting for more than 70%, and performing first-stage table reselection to obtain first-stage gravity concentrate and first-stage gravity tailings; the condition of the first-stage table reselection is that the ore pulp concentration is 30%, and the mass ratio of the first-stage gravity concentrate to the first-stage gravity tailings is 5: 95;
(2) grinding the first stage reselected tailings in the step (1) until the weight percentage of the grain size of-0.1 mm is more than 80%, and performing second stage table concentrator reselection on the grinded reselected tailings to obtain second stage reselected concentrate, second stage reselected secondary concentrate, second stage reselected middling and second stage reselected tailings; the condition of secondary table concentrator reselection is that the ore pulp concentration is 20%, and the mass ratio of the secondary gravity concentrate to the secondary gravity secondary concentrate to the secondary gravity middling to the secondary gravity tailings is 4:4:80: 12;
(3) grinding the second-stage reselected middlings in the step (2) until the weight percentage of the size fraction with the granularity of-0.05 mm is more than 90%, and performing three-stage table reselection on the ground second-stage reselected middlings to obtain three-stage reselected concentrates, three-stage reselected inferior concentrates, three-stage reselected middlings and three-stage reselected tailings; the condition of the three-stage table concentrator reselection is that the ore pulp concentration is 10%, and the mass ratio of the three-stage gravity concentrate, the three-stage gravity secondary concentrate, the three-stage gravity middling and the three-stage gravity tailings is 2:2:70: 26;
(4) performing strong magnetic roughing on the three-section gravity middlings in the step (3), wherein the magnetic field intensity of the strong magnetic roughing is 1.5T, so as to obtain roughing concentrate and roughing tailings; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 2.5T, and scavenging concentrate and scavenging tailings are obtained, wherein the scavenging tailings are quartz feldspar concentrate, the mineral purity of the quartz feldspar concentrate is 95.85%, the recovery rate is 64.35%, and the yield is 55.49%;
(5) combining the rougher concentrate and the scavenging concentrate in the step (4) with the secondary reselected concentrate and the secondary reselected tailings in the step (2), grinding until the granularity is-0.05 mm and accounts for more than 80%, and then performing four-section table concentrator reselection to obtain four-section reselected concentrate and four-section reselected tailings; the condition of the four-stage table reselection is that the ore pulp concentration is 10%, and the mass ratio of the four-stage reselection concentrate to the four-stage reselection tailing is 2: 98;
(6) merging the first stage gravity concentrate, the second stage gravity concentrate, the third stage gravity concentrate and the fourth stage gravity concentrate, grinding until the granularity is-0.05 mm and accounts for more than 85%, and then performing strong magnetic roughing, wherein the magnetic field intensity of the strong magnetic roughing is 1.5T, so as to obtain roughing concentrate and roughing tailings; carrying out strong magnetic concentration on the rough concentration concentrate, wherein the magnetic field intensity of the strong magnetic concentration is 3.5T, so as to obtain concentrated concentrate and concentrated tailings; the concentrated concentrate is rare multi-metal bulk concentrate, the purity of useful minerals in the rare multi-metal bulk concentrate is 93.23%, the recovery rate is 70.25%, and the yield is 2.31%; performing strong magnetic scavenging on the roughed tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.5T, so as to obtain scavenged concentrate and scavenged tailings, wherein the scavenged tailings are zirconium concentrate, the zirconium grade in the zirconium concentrate is 60.62%, the recovery rate is 72.05%, and the yield is 8.52%; and returning the concentration tailings and the scavenging concentrate to the operation of the strong magnetic roughing process.
Example 4
The method takes polymetallic ore containing rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium with the total amount of 15.0 percent and quartz feldspar with the content of 75.0 percent as raw material ore, and utilizes the process method of the invention to carry out the following process steps:
(1) taking polymetallic ore with the granularity of-0.5 mm accounting for more than 75%, and performing first-stage table reselection to obtain first-stage gravity concentrate and first-stage gravity tailings; the condition of the first-stage table reselection is that the ore pulp concentration is 30%, and the mass ratio of the first-stage gravity concentrate to the first-stage gravity tailings is 6: 94;
(2) grinding the first stage reselected tailings in the step (1) until the weight percentage of the grain size of-0.1 mm is more than 85%, and performing second stage table concentrator reselection on the grinded reselected tailings to obtain second stage reselected concentrate, second stage reselected secondary concentrate, second stage reselected middling and second stage reselected tailings; the condition of secondary table concentrator reselection is that the ore pulp concentration is 10%, and the mass ratio of the secondary gravity concentrate to the secondary gravity secondary concentrate to the secondary gravity middling to the secondary gravity tailings is 2:1:88: 9;
(3) grinding the second-stage reselected middlings in the step (2) until the weight percentage of the size fraction with the granularity of-0.05 mm is more than 95%, and performing three-stage table reselection on the ground second-stage reselected middlings to obtain three-stage reselected concentrates, three-stage reselected inferior concentrates, three-stage reselected middlings and three-stage reselected tailings; the condition of the three-stage table concentrator reselection is that the ore pulp concentration is 30%, and the mass ratio of the three-stage gravity concentrate, the three-stage gravity secondary concentrate, the three-stage gravity middling and the three-stage gravity tailings is 6:10:70: 14;
(4) performing strong magnetic roughing on the three-section gravity middlings in the step (3), wherein the magnetic field intensity of the strong magnetic roughing is 1.0T, so as to obtain roughing concentrate and roughing tailings; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.5T, and scavenging concentrate and scavenging tailings are obtained, wherein the scavenging tailings are quartz feldspar concentrate, the mineral purity of the quartz feldspar concentrate is 94.66%, the recovery rate is 63.85%, and the yield is 56.32%;
(5) combining the rougher concentrate and the scavenging concentrate in the step (4) with the secondary reselected concentrate and the secondary reselected tailings in the step (2), grinding until the granularity is-0.05 mm and accounts for more than 85%, and then performing four-section table concentrator reselection to obtain four-section reselected concentrate and four-section reselected tailings; the condition of the four-stage table reselection is that the concentration of ore pulp is 30%, and the mass ratio of the four-stage reselection concentrate to the four-stage reselection tailings is 4: 96;
(6) merging the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate, grinding until the granularity is-0.05 mm and accounts for more than 90%, and then performing strong magnetic roughing, wherein the magnetic field intensity of the strong magnetic roughing is 1.5T, so as to obtain roughing concentrate and roughing tailings; carrying out strong magnetic concentration on the rough concentration concentrate, wherein the magnetic field intensity of the strong magnetic concentration is 2.0T, so as to obtain concentrated concentrate and concentrated tailings; the concentrated concentrate is rare multi-metal bulk concentrate, the purity of useful minerals in the rare multi-metal bulk concentrate is 92.86%, the recovery rate is 72.15%, and the yield is 3.42%; performing strong magnetic scavenging on the roughed tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, scavenging concentrate and scavenged tailings are obtained, the scavenged tailings are zirconium concentrate, the zirconium grade in the zirconium concentrate is 62.35%, the recovery rate is 70.92%, and the yield is 11.70%; and returning the concentration tailings and the scavenging concentrate to the operation of the strong magnetic roughing process.
Example 5
The method takes polymetallic ore containing 9.06 percent of rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium and 79.38 percent of quartz feldspar as raw material ore, and utilizes the process method of the invention to carry out the following process steps:
(1) taking polymetallic ore with the granularity of-0.5 mm accounting for more than 75%, and performing first-stage table reselection to obtain first-stage gravity concentrate and first-stage gravity tailings; the condition of the first-stage table reselection is that the ore pulp concentration is 30%, and the mass ratio of the first-stage gravity concentrate to the first-stage gravity tailings is 4.5: 95.5;
(2) grinding the first stage reselected tailings in the step (1) until the weight percentage of the grain size of-0.1 mm is more than 80%, and performing second stage table concentrator reselection on the grinded reselected tailings to obtain second stage reselected concentrate, second stage reselected secondary concentrate, second stage reselected middling and second stage reselected tailings; the condition of secondary table concentrator reselection is that the ore pulp concentration is 20%, and the mass ratio of the secondary gravity concentrate to the secondary gravity secondary concentrate to the secondary gravity middling to the secondary gravity tailings is 3:4:65: 28;
(3) grinding the second-stage reselected middlings in the step (2) until the weight percentage of the size fraction with the granularity of-0.05 mm is more than 90%, and performing three-stage table reselection on the ground second-stage reselected middlings to obtain three-stage reselected concentrates, three-stage reselected inferior concentrates, three-stage reselected middlings and three-stage reselected tailings; the condition of the three-stage table concentrator reselection is that the ore pulp concentration is 10%, and the mass ratio of the three-stage gravity concentrate, the three-stage gravity secondary concentrate, the three-stage gravity middling and the three-stage gravity tailings is 1:2:85: 12;
(4) performing strong magnetic roughing on the three-section gravity middlings in the step (3), wherein the magnetic field intensity of the strong magnetic roughing is 2.5T, so as to obtain roughing concentrate and roughing tailings; performing strong magnetic scavenging on the rougher tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.5T, and scavenging concentrate and scavenged tailings are obtained, wherein the scavenged tailings are quartz feldspar concentrate, the mineral purity of the quartz feldspar concentrate is 95.87%, the recovery rate is 62.65%, and the yield is 51.87%;
(5) combining the rougher concentrate and the scavenging concentrate in the step (4) with the secondary reselected concentrate and the secondary reselected tailings in the step (2), grinding until the granularity is-0.05 mm and accounts for more than 85%, and then performing four-section table concentrator reselection to obtain four-section reselected concentrate and four-section reselected tailings; the condition of the four-stage table reselection is that the ore pulp concentration is 20%, and the mass ratio of the four-stage reselection concentrate to the four-stage reselection tailing is 2: 98;
(6) merging the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate, grinding until the granularity is-0.05 mm and accounts for more than 90%, and then performing strong magnetic roughing, wherein the magnetic field intensity of the strong magnetic roughing is 1.0T, so as to obtain roughing concentrate and roughing tailings; carrying out strong magnetic concentration on the rough concentration concentrate, wherein the magnetic field intensity of the strong magnetic concentration is 2.5T, so as to obtain concentrated concentrate and concentrated tailings; the concentrated concentrate is rare multi-metal bulk concentrate, the purity of useful minerals in the rare multi-metal bulk concentrate is 93.45%, the recovery rate is 71.88%, and the yield is 2.10%; performing strong magnetic scavenging on the roughed tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 2.5T, so as to obtain scavenged concentrate and scavenged tailings, wherein the scavenged tailings are zirconium concentrate, the zirconium grade in the zirconium concentrate is 61.35%, the recovery rate is 72.55%, and the yield is 7.50%; and returning the concentration tailings and the scavenging concentrate to the operation of the strong magnetic roughing process.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A beneficiation method for separating rare metal concentrate and quartz feldspar concentrate is characterized by comprising the following steps:
(1) taking the grinded polymetallic ore, and performing primary table reselection to obtain primary reselected concentrate and primary reselected tailings;
(2) grinding the gravity tailings obtained in the step (1), and performing secondary table concentrator gravity separation on the gravity tailings after grinding to obtain secondary gravity concentrate, secondary gravity secondary concentrate, secondary gravity middling and secondary gravity tailings;
(3) grinding the second-stage reselected middlings in the step (2), and performing third-stage table reselection on the ground second-stage reselected middlings to obtain third-stage reselected concentrates, third-stage reselected secondary concentrates, third-stage reselected middlings and third-stage reselected tailings;
(4) performing strong magnetic roughing on the three-stage gravity middlings in the step (3) to obtain roughed concentrate and roughed tailings; performing strong magnetic scavenging on the roughing tailings to obtain scavenged concentrate and scavenged tailings, wherein the scavenged tailings are quartz feldspar concentrate;
(5) merging the rougher concentrate and the scavenging concentrate in the step (4) with the secondary reselected concentrate and the secondary reselected tailings in the step (2), grinding, and then performing four-section table concentrator reselection to obtain four-section reselected concentrate and four-section reselected tailings;
(6) merging the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate for grinding, and then performing strong magnetic rough concentration to obtain rough concentrate and rough tailings; performing strong magnetic concentration on the rough concentration concentrate to obtain a concentrated concentrate and concentrated tailings, wherein the concentrated concentrate is rare multi-metal bulk concentrate; performing strong magnetic scavenging on the roughing tailings to obtain scavenged concentrate and scavenged tailings, wherein the scavenged tailings are zirconium concentrate; and returning the concentration tailings and the scavenging concentrate to the operation of the strong magnetic roughing process.
2. The beneficiation method for sorting rare metal concentrate and quartz feldspar concentrate according to claim 1, characterized in that in the step (1), the total amount of rare metal minerals including zirconium, uranium, niobium, beryllium, rare earth and titanium in the polymetallic ore is 5-15%, and the quartz feldspar content is 75-85%; the granularity of the grinded polymetallic ore is-0.5 mm and accounts for more than 50%.
3. The beneficiation method for separating rare metal concentrate and quartz feldspar concentrate according to claim 1, wherein in the step (1), the condition of the primary table gravity concentration is 10-30%, and the mass ratio of the primary gravity concentrate to the primary gravity tailings is 1.8-6: 94-98.2.
4. The beneficiation method for sorting rare metal concentrate and quartz feldspar concentrate according to claim 1, wherein in the step (2), the gravity tailings after grinding have a particle size of-0.1 mm, and the weight percentage of the particle size fraction is more than 70%.
5. The beneficiation method for sorting rare metal concentrate and quartz feldspar concentrate according to claim 1, wherein in the step (2), the condition of the secondary table concentration is that the ore pulp concentration is 10-30%, and the mass ratio of the secondary gravity concentrate, the secondary gravity middling and the secondary gravity tailings is 1.8-5:1-15:72-88: 8-28.
6. The beneficiation method for sorting rare metal concentrate and quartz feldspar concentrate according to claim 1, wherein in the step (3), the second stage gravity middlings after grinding have a particle size of-0.05 mm and account for more than 70% by weight of the fraction.
7. The beneficiation method for sorting rare metal concentrates and quartz feldspar concentrates according to claim 1, wherein in the step (3), the condition of the three-stage table reselection is that the pulp concentration is 10-30%, and the mass ratio of the three-stage reselection concentrate, the three-stage reselection secondary concentrate, the three-stage reselection middling and the three-stage reselection tailing is 1-6:0.5-10:70-85: 12-28.
8. The beneficiation method for sorting rare-metal concentrates and quartz feldspar concentrates according to claim 1, wherein in the step (4), the magnetic field intensity of the strong magnetic roughing is 1.0-2.5T, and the magnetic field intensity of the strong magnetic scavenging is 1.0-3.5T;
the mineral purity of the quartz feldspar concentrate is not less than 94%.
9. The beneficiation method for sorting rare-metal concentrates and quartz feldspar concentrates according to claim 1, wherein in the step (5), the ore is ground until the weight percentage of the-0.05 mm size fraction is more than 85%;
the condition of the four-stage table concentrator reselection is that the concentration of ore pulp is 10-30%, and the mass ratio of the four-stage gravity concentrate to the four-stage gravity tailings is 0.5-4: 96-99.5.
10. The beneficiation method to sort rare-metal concentrate and quartz feldspar concentrate according to claim 1, wherein in the step (6), the grinding is performed until the grain size-0.05 mm accounts for more than 85%;
the magnetic field intensity of the strong magnetic roughing is 1.0-2.5T, the magnetic field intensity of the strong magnetic cleaning is 1.0-3.5T, and the magnetic field intensity of the strong magnetic scavenging is 1.0-3.5T;
the zirconium grade in the zirconium concentrate is not less than 60%.
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