CN109290048B - Beneficiation method for sorting rare metal concentrate, zirconium concentrate and quartz feldspar concentrate - Google Patents
Beneficiation method for sorting rare metal concentrate, zirconium concentrate and quartz feldspar concentrate Download PDFInfo
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Abstract
The invention relates to a beneficiation method for separating rare metal concentrate, zirconium concentrate and quartz feldspar concentrate, which comprises the steps of firstly carrying out multi-stage table reselection on 801 ore, carrying out closed-loop strong magnetic separation on the concentrate obtained by gravity separation to obtain rare multi-metal bulk concentrate rich in rare earth, uranium, niobium, beryllium and titanium, wherein the purity of useful minerals in the rare multi-metal bulk concentrate is more than or equal to 92%, the recovery rate is more than or equal to 70%, and meanwhile, zirconium concentrate with the zirconium grade more than or equal to 60% and the recovery rate more than or equal to 70% can be obtained; and performing open-circuit strong magnetic separation on the middlings obtained by gravity separation to obtain quartz feldspar ore concentrates with the purity of more than or equal to 95% and the recovery rate of more than or equal to 60%, and combining the secondary ore concentrates obtained by gravity separation by a multistage table concentrator and tailings and then performing concentration desliming-table concentrator gravity separation to improve the recovery rate of the ore concentrates. According to the method, no chemical agent is added in the beneficiation process, the method belongs to physical beneficiation, and the method is an economic, environment-friendly and efficient beneficiation method.
Description
Technical Field
The invention belongs to the technical field of beneficiation, and particularly relates to a beneficiation method for separating rare metal concentrate, zirconium concentrate and quartz feldspar concentrate.
Background
The Tongliao 801 ore in inner Mongolia autonomous region is a multi-metal ore rich in various rare metal resources such as zirconium, rare earth, uranium, niobium, beryllium, titanium and the like, the resource amount of the multi-metal ore is estimated to be 2.4 hundred million tons, the storage capacity is huge, wherein the storage capacity of various rare metal resources such as niobium, zirconium, beryllium, rare earth and the like is in the front of China, according to statistics, the zirconium storage capacity of the 801 ore is about 371.88 ten thousand tons, the niobium storage capacity is about 30.93 ten thousand tons, the beryllium storage capacity is about 6.40 ten thousand tons, and the rare earth storage capacity is about 78.44 ten thousand tons, but the rare metal elements such as rare earth, uranium, niobium, beryllium, titanium and the like in the 801 ore are low in content, the occurrence states of the rare metal elements are quite dispersed, the valuable elements in various minerals are seriously contained, so that the difficulty in mineral separation for obtaining single and high-grade rare metal ore concentrates is large, even if single rare earth concentrates, niobium concentrates, zirconium concentrates and niobium concentrates are obtained, niobium concentrates and niobium concentrates, iron concentrates and, and each concentrate has no economic and environment-friendly hydrometallurgy process; and the radioactive tailings and flotation wastewater have large pressure on the environment, and the reason is that the key factor for realizing comprehensive utilization and development of 801 ores for more than 40 years is not realized.
If all minerals in 801 ore are classified according to specific gravity, the specific gravity of most rare metal elements is larger than that of gangue minerals, and more than 85% of gangue minerals are quartz and feldspar, so that the ore dressing process design is carried out on 801 ore by beginning with gravity separation and combining with a magnetic separation process, most rare metal elements can be efficiently enriched, the quartz and the feldspar in the gangue minerals are recovered, all valuable elements in 801 ore can be economically and reasonably classified, and the comprehensive development and utilization of 801 ore can be realized by combining with the existing or in-research advanced environment-friendly hydrometallurgy process.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a beneficiation method for separating rare metal concentrate, zirconium concentrate and quartz feldspar concentrate. The method can simultaneously obtain three mineral products of rare earth niobium titanium beryllium bulk concentrate, zirconium concentrate and quartz feldspar concentrate from rare multi-metal raw ore (inner Mongolia 801 ore). The method has the characteristics of simple process, low production cost and the like.
The technical scheme adopted by the invention is as follows:
a beneficiation method for sorting rare metal concentrate, zirconium concentrate and quartz feldspar concentrate comprises the following steps:
(1) taking the grinded rare multi-metal raw ore, and performing primary table concentrator reselection to obtain primary gravity concentrate, primary gravity secondary concentrate, primary gravity middling and primary gravity tailings;
(2) grinding the primary gravity middlings in the step (1), and performing secondary table concentrator gravity separation on the ground primary gravity middlings to obtain secondary gravity concentrates, secondary gravity secondary concentrates, secondary gravity middlings and secondary gravity tailings;
(3) grinding the secondary gravity middlings obtained in the step (2), and performing tertiary table reselection on the ground secondary gravity middlings to obtain tertiary gravity concentrates, tertiary gravity secondary concentrates, tertiary gravity middlings and tertiary gravity tailings;
(4) performing fourth-stage table reselection on the third-stage reselection middlings in the step (3) to obtain fourth-stage reselection concentrates, fourth-stage reselection secondary concentrates, fourth-stage reselection middlings and fourth-stage reselection tailings, wherein the fourth-stage reselection middlings are quartz feldspar rough concentrates;
(5) merging the primary gravity concentrate, the secondary gravity concentrate, the tertiary gravity concentrate and the fourth-level gravity concentrate to obtain rare metal mixed rough concentrate, grinding the rare metal mixed rough concentrate, and then performing five-level table gravity concentration to obtain five-level gravity concentrate and five-level gravity tailings;
(6) performing strong magnetic roughing on the five-level gravity concentrate obtained in the step (5) to obtain roughed concentrate and roughed tailings; performing strong magnetic concentration on the rough concentration concentrate to obtain concentrated concentrate and concentrated tailings, wherein the concentrated concentrate is rare multi-metal bulk concentrate, and the concentrated tailings are returned to the strong magnetic rough concentration process; performing strong magnetic scavenging on the rougher tailings to obtain scavenged concentrate and scavenged tailings, wherein the scavenged concentrate returns to the operation of the strong magnetic rougher tailings, and the scavenged tailings are zirconium concentrate;
(7) performing strong magnetic roughing on the quartz feldspar rough concentrate obtained in the step (4) to obtain rough concentrate and rough tailings, and performing strong magnetic scavenging on the rough tailings to obtain scavenged concentrate and scavenged tailings, wherein the scavenged tailings are quartz feldspar concentrate;
combining the primary gravity concentrate, the primary gravity tailings, the secondary gravity concentrate, the secondary gravity tailings, the tertiary gravity concentrate, the tertiary gravity tailings, the fourth-stage gravity concentrate, the fourth-stage gravity tailings, the fifth-stage gravity tailings in the step (5), the roughing concentrate in the step (7) and the scavenging concentrate, concentrating and desliming, and then performing six-stage table gravity separation to obtain six-stage gravity concentrate and six-stage gravity tailings; and (5) returning the six-stage gravity concentrate to the step (5) to be combined with the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate to be used as rare metal mixed rough concentrate.
In the step (1), the rare multi-metal raw ore is inner Mongolia 801 ore, the 801 ore contains rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium, the total amount of the minerals is 5-15%, and the content of quartz feldspar is 75-85%; the granularity of 801 ore after grinding is-0.5 mm and accounts for more than 70%.
In the step (1), the condition of primary table concentrator reselection is 10-30%, and the mass ratio of the primary gravity concentrate to the primary gravity secondary concentrate to the primary gravity middling to the primary gravity tailings is 1-7:0.5-7:85-96: 2-7.5.
In the step (2), the weight percentage of the grade with the granularity of-0.1 mm in the primary gravity concentration middlings after grinding accounts for more than 70%.
In the step (2), the condition of secondary table concentrator reselection is 10-30%, 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 1.5-6:1-7:80-86: 4-17.
In the step (3), the granularity of the secondary gravity middlings after grinding is-0.05 mm, and the weight percentage of the grade is more than 70%;
the condition of the tertiary table concentrator reselection is 10-30%, and the mass ratio of the tertiary gravity concentrate to the tertiary gravity sub-concentrate to the tertiary gravity middling to the tertiary gravity tailings is 1-6:2-9:80-85: 1-12.
In the step (4), the condition of the fourth-stage table reselection is 10-30%, and the mass ratio of the fourth-stage gravity concentrate, the fourth-stage gravity sub-concentrate, the fourth-stage gravity middling and the fourth-stage gravity tailings is 0.5-5:1-12:80-85: 3-18.5;
in the step (5), grinding until the granularity is-0.05 mm and accounts for 75 percent; the condition of the five-level table concentrator reselection is 10-30%, and the mass ratio of the five-level gravity concentrate to the five-level gravity tailings is 50-70: 30-50.
In the step (6), the mineral purity of the rare multi-metal bulk concentrate is not less than 92%;
the magnetic field intensity of the strong magnetic roughing is 1.0-3.0T, the magnetic field intensity of the strong magnetic cleaning is 2.0-4.0T, and the magnetic field intensity of the strong magnetic scavenging is 2.0-4.0T;
the zirconium grade in the zirconium concentrate is not less than 60%.
In the step (7), the magnetic field intensity of the strong magnetic rough concentration is 1.0-3.0T, and the magnetic field intensity of the strong magnetic scavenging is 2.0-4.0T;
the mineral purity of the quartz feldspar concentrate is not less than 95%.
The invention has the beneficial effects that:
(1) the rare multi-metal raw ore (inner Mongolia 801 ore) is preferentially separated by reselection, four products are obtained by reselection at each level, and the separation of the rare metal mineral with high specific gravity and the gangue mineral is effectively realized;
(2) the method has the advantages that after multiple gravity middlings and concentrates in the process are treated, the middlings and the concentrates are returned to the rare metal mixed rough concentrates, so that the recovery rate of the rare metals is improved, and the toxic radioactivity is prevented from diffusing;
(3) before closed-circuit magnetic separation is carried out on the rare metal mixed rough concentrate, table gravity separation and tailing discarding are carried out, so that the grades of the rare metal concentrate and the zirconium concentrate are improved;
(4) the separation method only adopts strong magnetic separation and gravity separation, and no chemical agent is added in the mineral separation process, so that the method is a clean and efficient mineral separation mode, and has low mineral separation cost and good environmental benefit.
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
By using the inner Mongolia 801 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 the raw material ore, the process method of the invention is utilized, as shown in figure 1, the following process steps are carried out:
(1) taking 801 ores with the granularity of-0.5 mm accounting for more than 70%, and performing primary table concentrator reselection to obtain primary gravity concentrate, primary gravity secondary concentrate, primary gravity middlings and primary gravity tailings; the primary table concentrator reselection condition is that the ore pulp concentration is 30%, and the mass ratio of the primary gravity concentrate to the primary gravity secondary concentrate to the primary gravity middling to the primary gravity tailings is 7:0.5:85: 7.5;
(2) grinding the primary gravity middlings in the step (1) until the weight percentage of the size fraction with the granularity of-0.1 mm accounts for 70%, and performing secondary table concentrator gravity separation on the ground primary gravity middlings to obtain secondary gravity concentrates, secondary gravity sub-concentrates, secondary gravity middlings and secondary gravity tailings; the secondary table concentrator reselection condition 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 1.5:3:85: 10.5;
(3) grinding the secondary gravity middlings in the step (2) until the granularity is-0.05 mm, wherein the weight percentage of the size fraction accounts for 70%, and performing tertiary table concentrator reselection on the ground secondary gravity middlings to obtain tertiary gravity concentrates, tertiary gravity sub-concentrates, tertiary gravity middlings and tertiary gravity tailings; the condition of the tertiary table concentrator reselection is that the ore pulp concentration is 10%, and the mass ratio of the tertiary gravity concentrate to the tertiary gravity secondary concentrate to the tertiary gravity middling to the tertiary gravity tailings is 1:2:85: 12;
(4) performing fourth-stage table reselection on the third-stage reselection middlings in the step (3) to obtain fourth-stage reselection concentrates, fourth-stage reselection secondary concentrates, fourth-stage reselection middlings and fourth-stage reselection tailings, wherein the fourth-stage reselection middlings are quartz feldspar rough concentrates; the condition of the fourth-stage table reselection is that the ore pulp concentration is 10%, and the mass ratio of the fourth-stage gravity concentrate to the fourth-stage gravity secondary concentrate to the fourth-stage gravity middling to the fourth-stage gravity tailings is 0.5:1:80: 18.5;
(5) merging the primary gravity concentrate, the secondary gravity concentrate, the tertiary gravity concentrate and the fourth-level gravity concentrate to obtain rare metal mixed rough concentrate, grinding the rare metal mixed rough concentrate until the granularity is-0.05 mm and accounts for 75%, and then performing five-level table concentrator gravity separation to obtain five-level gravity concentrate and five-level gravity tailings; the condition of the five-level table concentrator reselection is that the ore pulp concentration is 30%, and the mass ratio of the five-level gravity concentrate to the five-level gravity tailings is 60: 40;
(6) performing strong magnetic roughing on the five-level gravity concentrate obtained in the step (5), 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 3.0T, 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 94.08%, the recovery rate is 72.55%, and the yield is 1.15%; returning the selected tailings to the strong magnetic rough separation process operation; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, so as to obtain scavenged concentrate and scavenged tailings; returning the scavenged concentrate to the operation of the strong magnetic roughing step, wherein scavenged tailings are zirconium concentrate; the grade of zirconium in the zirconium concentrate is 60.00 percent, the recovery rate is 70.18 percent, and the yield is 4.10 percent;
(7) performing high-intensity magnetic roughing on the quartz feldspar rough concentrate obtained in the step (4), wherein the magnetic field intensity of the high-intensity magnetic roughing is 3.0T, so as to obtain rough concentrate and rough tailings; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 4.0T, so as to obtain scavenged concentrate and scavenged tailings; the scavenging tailings are quartz feldspar concentrates, the mineral purity of the quartz feldspar concentrates is 95.00%, the recovery rate is 62.35%, and the yield is 52.12%;
(8) combining the primary gravity concentrate, the primary gravity tailings, the secondary gravity concentrate, the secondary gravity tailings, the tertiary gravity concentrate, the tertiary gravity tailings, the fourth-stage gravity concentrate, the fourth-stage gravity tailings, the fifth-stage gravity tailings in the step (5), the roughing concentrate in the step (7) and the scavenging concentrate, concentrating and desliming, and then performing six-stage table gravity separation to obtain six-stage gravity concentrate and six-stage gravity tailings; returning the six-stage gravity concentrate to the step (5) to be combined with the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate to be used as rare metal mixed rough concentrate; and discarding the six-stage reselection tailings.
Example 2
By using the inner Mongolia 801 ore containing rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium with the total amount of 8.65% and quartz feldspar with the content of 78.30% as the raw material ore, the process method disclosed by the invention is utilized, and as shown in figure 1, the following process steps are carried out:
(1) taking 801 ores with the granularity of-0.5 mm accounting for more than 80%, and performing primary table concentrator reselection to obtain primary gravity concentrate, primary gravity secondary concentrate, primary gravity middlings and primary gravity tailings; the primary table concentrator reselection condition is that the ore pulp concentration is 25%, and the mass ratio of the primary gravity concentrate to the primary gravity secondary concentrate to the primary gravity middling to the primary gravity tailings is 3:7:85: 5;
(2) grinding the primary gravity middlings in the step (1) until the weight percentage of the size fraction with the granularity of-0.1 mm accounts for 80%, and performing secondary table concentrator gravity separation on the ground primary gravity middlings to obtain secondary gravity concentrates, secondary gravity sub-concentrates, secondary gravity middlings and secondary gravity tailings; the secondary table concentrator reselection conditions are 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 2.5:3:85: 9.5;
(3) grinding the secondary gravity middlings in the step (2) until the granularity is-0.05 mm, wherein the weight percentage of the size fraction accounts for 80%, and performing tertiary table concentrator gravity separation on the ground secondary gravity middlings to obtain tertiary gravity concentrates, tertiary gravity sub-concentrates, tertiary gravity middlings and tertiary gravity tailings; the condition of the tertiary table concentrator reselection is that the ore pulp concentration is 15%, and the mass ratio of the tertiary gravity concentrate to the tertiary gravity secondary concentrate to the tertiary gravity middling to the tertiary gravity tailings is 2.5:2:85: 10.5;
(4) performing fourth-stage table reselection on the third-stage reselection middlings in the step (3) to obtain fourth-stage reselection concentrates, fourth-stage reselection secondary concentrates, fourth-stage reselection middlings and fourth-stage reselection tailings, wherein the fourth-stage reselection middlings are quartz feldspar rough concentrates; the condition of the fourth-stage table reselection is that the ore pulp concentration is 10%, and the mass ratio of the fourth-stage gravity concentrate, the fourth-stage gravity secondary concentrate, the fourth-stage gravity middling and the fourth-stage gravity tailings is 2:1:85: 12;
(5) merging the primary gravity concentrate, the secondary gravity concentrate, the tertiary gravity concentrate and the fourth-level gravity concentrate to obtain rare metal mixed rough concentrate, grinding the rare metal mixed rough concentrate until the granularity is-0.05 mm and accounts for 80%, and then performing five-level table concentrator gravity separation to obtain five-level gravity concentrate and five-level gravity tailings; the condition of the five-level table concentrator reselection is that the ore pulp concentration is 30%, and the mass ratio of the five-level gravity concentrate to the five-level gravity tailings is 70: 30;
(6) performing strong magnetic roughing on the five-level gravity concentrate obtained in the step (5), wherein the magnetic field intensity of the strong magnetic roughing is 2.0T, 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 3.0T, so as to obtain concentrated concentrate and concentrated tailings; the concentrated concentrate is rare multi-metal bulk concentrate, the purity of useful minerals of the rare multi-metal bulk concentrate is 92.00 percent, the recovery rate is 71.50 percent, and the yield is 1.97 percent; returning the selected tailings to the strong magnetic rough separation process operation; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, so as to obtain scavenged concentrate and scavenged tailings; returning the scavenged concentrate to the operation of the strong magnetic roughing step, wherein scavenged tailings are zirconium concentrate; the grade of zirconium in the zirconium concentrate is 61.58%, the recovery rate is 71.07%, and the yield is 6.98%;
(7) performing strong magnetic roughing on the quartz feldspar rough concentrate obtained in the step (4), wherein the magnetic field intensity of the strong magnetic roughing is 2.0T, so as to obtain rough concentrate and rough tailings; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, so as to obtain scavenged concentrate and scavenged tailings; the scavenging tailings are quartz feldspar concentrates, the mineral purity of the quartz feldspar concentrates is 95.65%, the recovery rate is 62.89%, and the yield is 51.45%;
(8) combining the primary gravity concentrate, the primary gravity tailings, the secondary gravity concentrate, the secondary gravity tailings, the tertiary gravity concentrate, the tertiary gravity tailings, the fourth-stage gravity concentrate, the fourth-stage gravity tailings, the fifth-stage gravity tailings in the step (5), the roughing concentrate in the step (7) and the scavenging concentrate, concentrating and desliming, and then performing six-stage table gravity separation to obtain six-stage gravity concentrate and six-stage gravity tailings; returning the six-stage gravity concentrate to the step (5) to be combined with the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate to be used as rare metal mixed rough concentrate; and discarding the six-stage reselection tailings.
Example 3
By using the inner Mongolia 801 ore containing rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium with the total amount of 5.0% and quartz feldspar with the content of 85.0% as the raw material ore, the process method disclosed by the invention is utilized, and as shown in figure 1, the following process steps are carried out:
(1) taking 801 ores with the granularity of-0.5 mm accounting for more than 80%, and performing primary table concentrator reselection to obtain primary gravity concentrate, primary gravity secondary concentrate, primary gravity middlings and primary gravity tailings; the primary table concentrator reselection condition is that the ore pulp concentration is 10%, and the mass ratio of the primary gravity concentrate to the primary gravity secondary concentrate to the primary gravity middling to the primary gravity tailings is 1:5:90: 4;
(2) grinding the primary gravity middlings in the step (1) until the weight percentage of the size fraction with the granularity of-0.1 mm accounts for 80%, concentrating the ground primary gravity middlings and then performing secondary table concentrator gravity separation to obtain secondary gravity concentrates, secondary gravity sub-concentrates, secondary gravity middlings and secondary gravity tailings; the secondary table concentrator reselection condition 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 2:7:88: 3;
(3) grinding the secondary gravity middlings in the step (2) until the granularity is-0.05 mm, wherein the weight percentage of the size fraction accounts for 80%, concentrating the ground secondary gravity middlings and then performing tertiary table concentrator gravity separation to obtain tertiary gravity concentrates, tertiary gravity sub-concentrates, tertiary gravity middlings and tertiary gravity tailings; the condition of the tertiary table concentrator reselection is that the ore pulp concentration is 30%, and the mass ratio of the tertiary gravity concentrate, the tertiary gravity secondary concentrate, the tertiary gravity middling and the tertiary gravity tailings is 3:9:80: 8;
(4) performing fourth-stage table reselection after the third-stage reselection middling is dense to obtain fourth-stage reselection concentrate, fourth-stage reselection secondary concentrate, fourth-stage reselection middling and fourth-stage reselection tailings, wherein the fourth-stage reselection middling is quartz feldspar rough concentrate; the condition of the fourth-stage table reselection is that the ore pulp concentration is 30%, and the mass ratio of the fourth-stage gravity concentrate, the fourth-stage gravity secondary concentrate, the fourth-stage gravity middling and the fourth-stage gravity tailings is 5:12:80: 3;
(5) merging the primary gravity concentrate, the secondary gravity concentrate, the tertiary gravity concentrate and the fourth-level gravity concentrate to obtain rare metal mixed rough concentrate, grinding the rare metal mixed rough concentrate until the granularity is-0.05 mm and accounts for 80%, and then performing five-level table concentrator gravity separation to obtain five-level gravity concentrate and five-level gravity tailings; the condition of the five-level table concentrator reselection is that the ore pulp concentration is 30%, and the mass ratio of the five-level gravity concentrate to the five-level gravity tailings is 50: 50;
(6) performing strong magnetic roughing on the five-level gravity concentrate obtained in the step (5), wherein the magnetic field intensity of the strong magnetic roughing is 2.0T, 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 3.0T, so as to obtain concentrated concentrate and concentrated tailings; the concentrated concentrate is rare multi-metal bulk concentrate, the purity of useful minerals of the rare multi-metal bulk concentrate is 92.05%, the recovery rate is 70.33%, and the yield is 1.14%; returning the selected tailings to the strong magnetic rough separation process operation; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, so as to obtain scavenged concentrate and scavenged tailings; returning the scavenged concentrate to the operation of the strong magnetic roughing step, wherein scavenged tailings are zirconium concentrate; the grade of zirconium in the zirconium concentrate is 61.18%, the recovery rate is 71.21%, and the yield is 4.00%;
(7) performing strong magnetic roughing on the quartz feldspar rough concentrate obtained in the step (4), wherein the magnetic field intensity of the strong magnetic roughing is 2.0T, so as to obtain rough concentrate and rough tailings; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, so as to obtain scavenged concentrate and scavenged tailings; the scavenging tailings are quartz feldspar concentrates, the mineral purity of the quartz feldspar concentrates is 96.67%, the recovery rate is 62.38%, and the yield is 54.30%;
(8) combining the primary gravity concentrate, the primary gravity tailings, the secondary gravity concentrate, the secondary gravity tailings, the tertiary gravity concentrate, the tertiary gravity tailings, the fourth-stage gravity concentrate, the fourth-stage gravity tailings, the fifth-stage gravity tailings in the step (5), the roughing concentrate in the step (7) and the scavenging concentrate, concentrating and desliming, and then performing six-stage table gravity separation to obtain six-stage gravity concentrate and six-stage gravity tailings; returning the six-stage gravity concentrate to the step (5) to be combined with the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate to be used as rare metal mixed rough concentrate; and discarding the six-stage reselection tailings.
Example 4
By using the inner Mongolia 801 ore containing rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium with the total amount of 10.80 percent and quartz feldspar with the content of 83.15 percent as the raw material ore, the process method disclosed by the invention is used, and as shown in figure 1, the following process steps are carried out:
(1) taking 801 ores with the granularity of-0.5 mm accounting for more than 75%, and performing primary table concentrator reselection to obtain primary gravity concentrate, primary gravity secondary concentrate, primary gravity middlings and primary gravity tailings; the primary table concentrator reselection condition is that the ore pulp concentration is 10%, and the mass ratio of the primary gravity concentrate to the primary gravity secondary concentrate to the primary gravity middling to the primary gravity tailings is 1:1:96: 2;
(2) grinding the primary gravity middlings in the step (1) until the weight percentage of the size fraction with the granularity of-0.1 mm accounts for 75%, concentrating the ground primary gravity middlings, and then performing secondary table concentrator gravity separation to obtain secondary gravity concentrates, secondary gravity sub-concentrates, secondary gravity middlings and secondary gravity tailings; the secondary table concentrator reselection condition 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 6:5:85: 4;
(3) grinding the secondary gravity middlings in the step (2) until the granularity is-0.05 mm, wherein the weight percentage of the size fraction accounts for 75%, and performing tertiary table concentrator reselection on the ground secondary gravity middlings to obtain tertiary gravity concentrates, tertiary gravity sub-concentrates, tertiary gravity middlings and tertiary gravity tailings; the condition of the tertiary table concentrator reselection is that the ore pulp concentration is 20%, and the mass ratio of the tertiary gravity concentrate, the tertiary gravity secondary concentrate, the tertiary gravity middling and the tertiary gravity tailings is 3:4:83: 10;
(4) performing fourth-stage table reselection on the third-stage reselection middlings in the step (3) to obtain fourth-stage reselection concentrates, fourth-stage reselection secondary concentrates, fourth-stage reselection middlings and fourth-stage reselection tailings, wherein the fourth-stage reselection middlings are quartz feldspar rough concentrates; the condition of the fourth-stage table reselection is that the ore pulp concentration is 10%, and the mass ratio of the fourth-stage gravity concentrate to the fourth-stage gravity secondary concentrate to the fourth-stage gravity middling to the fourth-stage gravity tailings is 1:1:80: 18;
(5) merging the primary gravity concentrate, the secondary gravity concentrate, the tertiary gravity concentrate and the fourth-level gravity concentrate to obtain rare metal mixed rough concentrate, grinding the rare metal mixed rough concentrate until the granularity is-0.05 mm and accounts for 75%, and then performing five-level table concentrator gravity separation to obtain five-level gravity concentrate and five-level gravity tailings; the condition of the five-level table concentrator reselection is that the ore pulp concentration is 30%, and the mass ratio of the five-level gravity concentrate to the five-level gravity tailings is 60: 40;
(6) performing strong magnetic roughing on the five-level gravity concentrate obtained in the step (5), wherein the magnetic field intensity of the strong magnetic roughing is 3.0T, 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 2.0T, 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 93.37%, the recovery rate is 72.78%, and the yield is 2.52%; returning the selected tailings to the strong magnetic rough separation process operation; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, so as to obtain scavenged concentrate and scavenged tailings; returning the scavenged concentrate to the operation of the strong magnetic roughing step, wherein scavenged tailings are zirconium concentrate; the zirconium grade in the zirconium concentrate is 62.18%, the recovery rate is 70.35%, and the yield is 8.55%;
(7) performing strong magnetic roughing on the quartz feldspar rough concentrate obtained in the step (4), wherein the magnetic field intensity of the strong magnetic roughing is 2.0T, so as to obtain rough concentrate and rough tailings; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, so as to obtain scavenged concentrate and scavenged tailings; the scavenging tailings are quartz feldspar concentrates, the mineral purity of the quartz feldspar concentrates is 95.89%, the recovery rate is 61.33%, and the yield is 53.18%;
(8) combining the primary gravity concentrate, the primary gravity tailings, the secondary gravity concentrate, the secondary gravity tailings, the tertiary gravity concentrate, the tertiary gravity tailings, the fourth-stage gravity concentrate, the fourth-stage gravity tailings, the fifth-stage gravity tailings in the step (5), the roughing concentrate in the step (7) and the scavenging concentrate, concentrating and desliming, and then performing six-stage table gravity separation to obtain six-stage gravity concentrate and six-stage gravity tailings; returning the six-stage gravity concentrate to the step (5) to be combined with the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate to be used as rare metal mixed rough concentrate; and discarding the six-stage reselection tailings.
Example 5
By using the inner Mongolia 801 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 the raw material ore, the process method disclosed by the invention is utilized, and as shown in figure 1, the following process steps are carried out:
(1) taking 801 ores with the granularity of-0.5 mm accounting for more than 80%, and performing primary table concentrator reselection to obtain primary gravity concentrate, primary gravity secondary concentrate, primary gravity middlings and primary gravity tailings; the primary table concentrator reselection condition is that the ore pulp concentration is 15%, and the mass ratio of the primary gravity concentrate to the primary gravity secondary concentrate to the primary gravity middling to the primary gravity tailings is 3:2:90: 5;
(2) grinding the primary gravity middlings in the step (1) until the weight percentage of the size fraction with the granularity of-0.1 mm accounts for 80%, and performing secondary table concentrator gravity separation on the ground primary gravity middlings to obtain secondary gravity concentrates, secondary gravity sub-concentrates, secondary gravity middlings and secondary gravity tailings; the secondary table concentrator reselection condition 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 2:1:80: 17;
(3) grinding the secondary gravity middlings in the step (2) until the granularity is-0.05 mm, wherein the weight percentage of the size fraction accounts for 80%, concentrating the ground secondary gravity middlings and then performing tertiary table concentrator gravity separation to obtain tertiary gravity concentrates, tertiary gravity sub-concentrates, tertiary gravity middlings and tertiary gravity tailings; the condition of the tertiary table concentrator reselection is that the ore pulp concentration is 30%, and the mass ratio of the tertiary gravity concentrate, the tertiary gravity secondary concentrate, the tertiary gravity middling and the tertiary gravity tailings is 6:8:85: 1;
(4) performing fourth-stage table reselection on the third-stage reselection middlings in the step (3) to obtain fourth-stage reselection concentrates, fourth-stage reselection secondary concentrates, fourth-stage reselection middlings and fourth-stage reselection tailings, wherein the fourth-stage reselection middlings are quartz feldspar rough concentrates; the condition of the fourth-stage table reselection is that the ore pulp concentration is 20%, and the mass ratio of the fourth-stage gravity concentrate to the fourth-stage gravity secondary concentrate to the fourth-stage gravity middling to the fourth-stage gravity tailings is 4:5:85: 6;
(5) merging the primary gravity concentrate, the secondary gravity concentrate, the tertiary gravity concentrate and the fourth-level gravity concentrate to obtain rare metal mixed rough concentrate, grinding the rare metal mixed rough concentrate until the granularity is-0.05 mm and accounts for 80%, and then performing five-level table concentrator gravity separation to obtain five-level gravity concentrate and five-level gravity tailings; the condition of the five-level table concentrator reselection is that the ore pulp concentration is 10%, and the mass ratio of the five-level gravity concentrate to the five-level gravity tailings is 50: 50;
(6) performing strong magnetic roughing on the five-level gravity concentrate obtained in the step (5), 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 3.0T, 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 93.65%, the recovery rate is 71.55%, and the yield is 3.10%; returning the selected tailings to the strong magnetic rough separation process operation; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, so as to obtain scavenged concentrate and scavenged tailings; returning the scavenged concentrate to the operation of the strong magnetic roughing step, wherein scavenged tailings are zirconium concentrate; the grade of zirconium in the zirconium concentrate is 61.39%, the recovery rate is 71.85%, and the yield is 11.17%;
(7) performing strong magnetic roughing on the quartz feldspar rough concentrate obtained in the step (4), wherein the magnetic field intensity of the strong magnetic roughing is 2.0T, so as to obtain rough concentrate and rough tailings; performing strong magnetic scavenging on the roughing tailings, wherein the magnetic field intensity of the strong magnetic scavenging is 3.0T, so as to obtain scavenged concentrate and scavenged tailings; the scavenging tailings are quartz feldspar concentrates, the mineral purity of the quartz feldspar concentrates is 96.68%, the recovery rate is 60.38%, and the yield is 52.80%;
(8) combining the primary gravity concentrate, the primary gravity tailings, the secondary gravity concentrate, the secondary gravity tailings, the tertiary gravity concentrate, the tertiary gravity tailings, the fourth-stage gravity concentrate, the fourth-stage gravity tailings, the fifth-stage gravity tailings in the step (5), the roughing concentrate in the step (7) and the scavenging concentrate, concentrating and desliming, and then performing six-stage table gravity separation to obtain six-stage gravity concentrate and six-stage gravity tailings; returning the six-stage gravity concentrate to the step (5) to be combined with the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate to be used as rare metal mixed rough concentrate; and discarding the six-stage reselection tailings.
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 (1)
1. A beneficiation method for sorting rare metal concentrate, zirconium concentrate and quartz feldspar concentrate is characterized by comprising the following steps:
(1) taking the grinded rare multi-metal raw ore, and performing primary table concentrator reselection to obtain primary gravity concentrate, primary gravity secondary concentrate, primary gravity middling and primary gravity tailings;
the rare multi-metal raw ore is inner Mongolia 801 ore, the 801 ore contains rare metals of zirconium, uranium, niobium, beryllium, rare earth and titanium, the total amount of the minerals is 5-15%, and the content of quartz feldspar is 75-85%; the granularity of the grinded rare multi-metal raw ore is-0.5 mm and accounts for more than 70%; the primary table concentrator reselection conditions are that the concentration of ore pulp is 10-30%, and the mass ratio of the primary gravity concentrate to the primary gravity secondary concentrate to the primary gravity middling to the primary gravity tailings is 1-7:0.5-7:85-96: 2-7.5;
(2) grinding the primary gravity middlings in the step (1), wherein the ground primary gravity middlings have a granularity of-0.1 mm and account for more than 70% of the primary gravity middlings in percentage by weight; performing secondary table concentrator reselection on the primary gravity middlings after grinding to obtain secondary gravity concentrates, secondary gravity secondary concentrates, secondary gravity middlings and secondary gravity tailings; the secondary table concentrator reselection conditions are that the concentration of ore pulp is 10-30%, and the mass ratio of secondary gravity concentrate, secondary gravity secondary concentrate, secondary gravity middling and secondary gravity tailings is 1.5-6:1-7:80-86: 4-17;
(3) grinding the secondary gravity middlings obtained in the step (2), wherein the ground secondary gravity middlings have a granularity of-0.05 mm and account for more than 70% of the secondary gravity middlings in percentage by weight;
carrying out tertiary table concentrator reselection on the secondary gravity middlings after grinding to obtain tertiary gravity concentrates, tertiary gravity secondary concentrates, tertiary gravity middlings and tertiary gravity tailings; the condition of the tertiary table concentrator reselection is that the concentration of ore pulp is 10-30%, and the mass ratio of the tertiary gravity concentrate, the tertiary gravity secondary concentrate, the tertiary gravity middling and the tertiary gravity tailings is 1-6:2-9:80-85: 1-12;
(4) performing fourth-stage table reselection on the third-stage reselection middlings in the step (3) to obtain fourth-stage reselection concentrates, fourth-stage reselection secondary concentrates, fourth-stage reselection middlings and fourth-stage reselection tailings, wherein the fourth-stage reselection middlings are quartz feldspar rough concentrates; the condition of the fourth-stage table reselection is that the concentration of ore pulp is 10-30%, and the mass ratio of the fourth-stage gravity concentrate, the fourth-stage gravity secondary concentrate, the fourth-stage gravity middling and the fourth-stage gravity tailings is 0.5-5:1-12:80-85: 3-18.5;
(5) merging the primary gravity concentrate, the secondary gravity concentrate, the tertiary gravity concentrate and the fourth-level gravity concentrate to obtain rare metal mixed rough concentrate, grinding the rare metal mixed rough concentrate until the granularity is-0.05 mm and accounts for 70%, and then performing five-level table concentrator gravity separation to obtain five-level gravity concentrate and five-level gravity tailings; the condition of the five-level table concentrator reselection is that the ore pulp concentration is 10-30%, and the mass ratio of the five-level gravity concentrate to the five-level gravity tailings is 50-70: 30-50;
(6) performing strong magnetic roughing on the five-level gravity concentrate obtained in the step (5) to obtain roughed concentrate and roughed 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, and the mineral purity of the rare multi-metal bulk concentrate is not less than 92%;
returning the selected tailings to the strong magnetic rough separation process operation; performing strong magnetic scavenging on the roughed tailings to obtain scavenged concentrate and scavenged tailings, wherein the scavenged concentrate returns to the operation of the strong magnetic rougher flotation process, and the scavenged tailings are zirconium concentrate with the zirconium grade being equal to or larger than 60%; the magnetic field intensity of the strong magnetic roughing is 1.0-3.0T, the magnetic field intensity of the strong magnetic cleaning is 2.0-4.0T, and the magnetic field intensity of the strong magnetic scavenging is 2.0-4.0T;
(7) performing strong-magnetic roughing on the quartz feldspar rough concentrate in the step (4) to obtain rough concentrate and rough tailings, and performing strong-magnetic scavenging on the rough tailings in the step to obtain scavenged concentrate and scavenged tailings, wherein the scavenged tailings in the step are quartz feldspar concentrate with the mineral purity not less than 95%; the magnetic field intensity of the strong magnetic rough concentration in the step is 1.0-3.0T, and the magnetic field intensity of the strong magnetic scavenging in the step is 2.0-4.0T; combining the primary gravity concentrate, the primary gravity tailings, the secondary gravity concentrate, the secondary gravity tailings, the tertiary gravity concentrate, the tertiary gravity tailings, the quaternary gravity concentrate, the quaternary gravity tailings, the fifth gravity tailings in the step (5), the roughing concentrate in the step and the scavenging concentrate in the step, concentrating and desliming, and then performing six-stage table concentrator gravity separation to obtain six-stage gravity concentrate and six-stage gravity tailings; and (5) returning the six-stage gravity concentrate to the step (5) to be combined with the first-stage gravity concentrate, the second-stage gravity concentrate, the third-stage gravity concentrate and the fourth-stage gravity concentrate to be used as rare metal mixed rough concentrate.
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