CN109847924B - Beneficiation method for coarse-grained cassiterite in tin-containing polymetallic sulfide ore - Google Patents
Beneficiation method for coarse-grained cassiterite in tin-containing polymetallic sulfide ore Download PDFInfo
- Publication number
- CN109847924B CN109847924B CN201910170405.2A CN201910170405A CN109847924B CN 109847924 B CN109847924 B CN 109847924B CN 201910170405 A CN201910170405 A CN 201910170405A CN 109847924 B CN109847924 B CN 109847924B
- Authority
- CN
- China
- Prior art keywords
- concentrate
- tin
- bed
- scavenging
- tailings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses a method for dressing coarse cassiterite in tin-containing polymetallic sulphide ore, which comprises the steps of firstly pre-grading tin-containing polymetallic sulphide ore, feeding the graded fine fraction ore into a fine cassiterite grading system, feeding the graded coarse fraction ore into a coarse fraction cassiterite grading process, and finally grading coarse tin concentrate with higher tin content after coarse grain desulfurization flotation, vibrating screen grading, spiral chute grading, shaking table coarse scavenging, tin coarse concentrate flotation desulfurization and shaking table concentration of the coarse fraction cassiterite grading process. Promoting the improvement of the technical index and the economic benefit of the cassiterite separation and the technical progress of the ore separation.
Description
Technical Field
The invention relates to a beneficiation method of cassiterite, in particular to a beneficiation method of coarse-grained cassiterite in tin-containing polymetallic sulfide ores, and belongs to the technical field of beneficiation.
Background
Tin ore is one of the dominant minerals in China, has more associated components and high comprehensive recycling value, wherein, cassiterite (SnO)2) Is the main recovered tin-containing mineral. The density of the cassiterite is 6.0-7.0g/cm3, the cassiterite is larger than symbiotic gangue and metal minerals, gravity separation is a traditional process method for recovering the cassiterite, the gravity separation recovery efficiency of coarse-grained cassiterite of +0.037mm is high, the cost is relatively low, and the gravity separation of fine-grained cassiterite of-0.037 mm is difficult to effectively recover. The cassiterite is brittle and fragile, the phenomena of argillization and over-crushing are inevitably generated in the working links of mining, crushing, grinding and the like, a large amount of fine-grained cassiterite with the grain size of-0.037 mm is generated, most cassiterite minerals are uneven in embedded grain size, and the cassiterite minerals of all grain sizes cannot be economically and efficiently recovered by the traditional single gravity mineral separation process. Meanwhile, in domestic mineral resources, the types of single cassiterite minerals are few, and cassiterite is associated with minerals such as other metal sulfide ores and magnetite ores, so that the difficulty of comprehensive utilization of resources is further increased, along with further expansion of mining and recycling of mineral resources, the selected grade is gradually reduced, the recovery rate of the cassiterite minerals is reduced, and the production cost is increased.
The shaking table has the characteristics of high enrichment ratio and good sorting effect, is a preferred device for recycling coarse-grained cassiterite, but along with the gradual large-scale construction of a concentrating mill, the influence of multiple factors such as fine grinding granularity required by polymetallic minerals, low processing capacity of a single shaking table and the like causes the problems of multiple production series, high production cost and energy consumption, complex process, high management and control difficulty and the like due to the fact that the number of the shaking tables is large, the occupied area is large and the like.
In order to further improve the comprehensive recovery utilization rate of resources and reduce the production cost, aiming at the problem that the recovery effect of the gravity separation method on the fine cassiterite is poor in recent years, the fine cassiterite flotation process technology is rapidly developed and applied to industrial production, the problem that the fine cassiterite is difficult to recover is effectively solved, meanwhile, the combination of coarse-fraction cassiterite separation process equipment is gradually diversified, ideas for reducing the production cost by preselecting and desliming and production application are gradually increased, and the comprehensive recovery cost of the cassiterite is reduced. However, the economic and efficient comprehensive recovery of cassiterite from cassiterite-containing polymetallic minerals is a difficult problem which troubles the field of ore dressing, and the innovation of a new process, a plurality of equipment combinations and a new idea is also a subject of continuous research and progress in the field of ore dressing.
Disclosure of Invention
In order to improve the comprehensive recovery rate of the cassiterite in the cassiterite-containing polymetallic minerals, the invention aims to provide a beneficiation method of coarse-fraction cassiterite in the cassiterite-containing polymetallic sulfide minerals, provide an economic and efficient way for the recovery of the coarse-fraction cassiterite, and effectively promote the improvement of the technical index and the economic benefit of cassiterite beneficiation and the development progress of beneficiation technologies.
The technical scheme of the invention is as follows: the method comprises the steps of firstly, pre-grading tin-containing multi-metal sulfide ores, enabling the graded fine-fraction ores to enter a fine-fraction cassiterite grading system, enabling the graded coarse-fraction ores to enter a coarse-fraction cassiterite grading flow, and finally sorting coarse-fraction tin concentrates with tin content of 38-45% after coarse-fraction cassiterite grading coarse-fraction desulfuration flotation, vibrating screen grading, spiral chute sorting, shaking table coarse scavenging, flotation desulfuration and shaking table concentration.
The beneficiation method comprises the following specific steps:
(1) firstly, adjusting the weight concentration of tin-containing polymetallic sulphide ore materials to be 17-25%, then carrying out +/-0.037 mm size fraction pre-classification by using a cyclone, ensuring the operating pressure of the cyclone to be 0.05-0.15 Mpa, obtaining +0.037mm materials and-0.037 mm materials, and enabling the-0.037 mm materials to enter a fine-grain cassiterite sorting system;
(2) performing coarse grain desulfurization flotation on the material with the grain size of +0.037mm obtained in the step (1) to obtain sulfur concentrate A and tailings, performing classification operation on the tailings by using a vibrating screen, selecting the classification size of the vibrating screen to be 0.106-0.180 mm to obtain an oversize coarse grain gangue material and an undersize tin-containing material, and directly discarding the oversize coarse grain gangue material;
(3) performing spiral chute sorting, enrichment and grading on the undersize stanniferous materials obtained in the step (2) to obtain chute concentrates, chute middlings and chute tailings, enabling the chute tailings to enter a fine-grain cassiterite sorting system, enabling the chute concentrates and the chute middlings to enter shaking table rough scavenging operation to finally obtain stannum rough concentrates A and shaking table rough scavenging tailings, and directly throwing tails by using the shaking table rough scavenging tailings;
the concrete flow of the chute concentrate and the chute middlings entering the table rough scavenging operation in the step (3) is as follows:
firstly, carrying out table roughing on chute concentrates to respectively obtain tin rough concentrates I, inferior concentrates I, middlings I and tailings I, carrying out table roughing on chute middlings to respectively obtain tin rough concentrates II, inferior concentrates II, middlings II and tailings II, then mixing the chute concentrates and the middlings I and II obtained by table roughing of the chute middlings and entering a comprehensive middling bed for scavenging to obtain tin rough concentrates III, inferior concentrates III, middlings III and tailings III, mixing the chute concentrates and the tailings I and II obtained by table roughing of the chute middlings and the tailings II and entering a tailing bed for scavenging to obtain tin rough concentrates IV, inferior concentrates IV, middlings IV and tailings IV, wherein the middlings III, the middlings IV, the middlings III, the tailings III and the tailings IV are combined to form table roughing tailings, directly throwing tailings, the inferior concentrates I, the inferior concentrates II, the inferior concentrates III and the inferior concentrates IV are mixed and then enter the inferior concentrates bed for primary scavenging, obtaining a tin rough concentrate V, a secondary concentrate V, a middling V and a tailing V, mixing the middling V and the tailing V, and then feeding the mixture into a secondary concentrate secondary bed for scavenging to obtain a tin rough concentrate VI, a secondary concentrate VI, a middling VI and a tailing VI; then mixing the middling VI and the tailings VI, and then entering a comprehensive middling bed for circular recleaning, wherein the secondary concentrate V and the secondary concentrate VI are both returned to the primary concentrate for circular recleaning on a first-stage bed; finally, combining the tin rough concentrates I-VI obtained by the rough scavenging operation table concentrator to obtain tin rough concentrate A, wherein the materials entering the first-stage bed of the secondary concentrate and the comprehensive middle ore bed are concentrated by a thickener or a thickening box before entering, the bottom flow of the thickener or the thickening box is classified by a swirler, the settled sand of the swirler after classification is further reground by a vertical stirring mill, and the overflow of the swirler is combined with the ore discharge of the vertical stirring mill and then enters the first-stage bed of the secondary concentrate and the middle ore bed respectively.
The process conditions and equipment configuration models of the operation of rough scavenging of the chute concentrate and the chute middling in the step (3) by using a shaking table are as follows:
when the chute concentrate is subjected to table roughing, the granularity of the selected material of the chute concentrate is controlled to be-0.180 mm- +0.063mm, the selected weight concentration is 30-38%, and a coarse sand bed is selected: a wave-shaped bed: fine sand bed: carrying out configuration sorting on a tin cloud type shaking table with a grooving bed being 1:2:2: 2;
when the chute middlings are subjected to table roughing, the granularity of selected materials of the chute middlings is controlled to be-0.063 mm- +0.037mm, the selected weight concentration is 27-32%, and a wave-shaped bed is selected: fine sand mold: groove carving: and (3) carrying out configuration sorting on the fine mud bed by a cloudy tin type shaking table with the ratio of 1:1:2: 3.
The concentration by weight of the material entering the comprehensive middling bed scavenging is 25-32%, and a coarse sand bed is selected: fine sand mold: groove carving: configuring and sorting a fine mud bed by a cloudy tin type shaking table with the ratio of 1:3:2:1, wherein the selected weight concentration of materials entering a tailing bed is 15-23%, and selecting a fine sand mold: groove carving: and (3) carrying out configuration and sorting on a fine mud bed which is a 2:3:2 yunxin type shaking table.
The concentration by weight of the selected materials entering the first-stage bed separation of the secondary concentrate is 28-35%, and a coarse sand bed is selected: a wave-shaped bed: groove carving: and (2) carrying out configuration sorting on a fine mud bed (2: 2:2: 1) cloud tin type table concentrator, wherein the selected weight concentration of the materials entering the secondary concentrate secondary bed sorting is 20-27%, and a coarse sand bed is selected: fine sand bed: groove carving: and (3) carrying out configuration sorting on the fine mud bed by a cloudy tin type shaking table with the ratio of 1:2:3: 1.
(4) And (3) concentrating the tin rough concentrate A in the step (3), and then carrying out flotation desulfurization treatment to obtain a sulfur concentrate B and a desulfurized tin rough concentrate B, mixing the sulfur concentrate A and the sulfur concentrate B to obtain a final sulfur concentrate, carrying out table concentration operation on the tin rough concentrate B to obtain coarse-grained tin concentrate with a tin content of 38-45% and table concentration tailings, and returning the table concentration tailings to the secondary concentrate primary bed for circular recleaning in the table rough scavenging operation in the step (3).
The specific flow structure and process equipment parameters of the tin rough concentrate B entering the table concentration operation in the step (4) are as follows:
and (3) carrying out primary roughing and secondary scavenging by adopting a tin cloud shaking table, wherein the concentration of the materials to be selected of the primary roughing shaking table is 15-20%, roughing concentrate and roughing tailings are obtained through the primary shaking table roughing, the roughing tailings are concentrated and then adjusted to have the concentration of 13-20%, the roughing tailings enter the operation of a scavenging first shaking table to obtain scavenging first concentrate and scavenging first tailings, the scavenging first tailings are concentrated and then adjusted to have the concentration of 10-15%, the scavenging first tailings enter the operation of a scavenging second shaking table to obtain scavenging second concentrate and scavenging second tailings, the scavenging second tailings are returned to the secondary concentrate in the shaking table roughing operation in the step (3), and the roughing concentrate, the scavenging first concentrate and the scavenging second concentrate are mixed to be used as final coarse tin concentrate.
The primary shaking table rough selection adopts a coarse sand bed: a wave-shaped bed: a grooving bed: the fine mud bed is sorted by the configuration of a 1:3:2:1 cloud tin type shaking table, and the operation of the sweeping-selecting shaking table adopts a wave-shaped bed: fine sand bed: a grooving bed: sorting the fine mud bed in a configuration of a cloud tin type shaking table with a ratio of 2:2:2:1, selecting a wave-shaped bed in the operation of a sweeping and selecting two shaking tables: a grooving bed: sorting the fine mud beds by the configuration of a cloudy tin type shaking table with the ratio of 3:3: 1.
(5) The coarse grain desulfurization flotation in the step (2) and the flotation desulfurization treatment of the tin rough concentrate A in the step (4) comprise primary roughing, at least secondary scavenging and at least secondary concentration, and the reagents used in each flotation process comprise concentrated sulfuric acid serving as an activator, a desulfurization collector DF-336 and pine oil serving as a foaming agent, wherein the total consumption of the concentrated sulfuric acid activator is 4000g/t in terms of the amount of dry ores to be selected, the total consumption of the DF-336 desulfurization collector is 40-200g/t in terms of the amount of dry ores to be selected, the total consumption of the pine oil foaming agent is 30-100g/t in terms of the amount of dry ores to be selected, the addition amount of each reagent in the roughing operation is 60-85% of the total consumption of each reagent, and the addition amount of each reagent in at least secondary scavenging operation is 15-40% of the total consumption of each reagent.
The addition amount of each medicament in the primary roughing operation is preferably 75-80% of the total consumption amount of each medicament, and the addition amount of each medicament in at least the secondary scavenging operation is preferably 20-25% of the total consumption amount of each medicament.
The flotation time of the primary roughing, the at least secondary scavenging and the at least secondary concentrating is 4-12min, the optimal time is 6-8min, and the concentration of the selected materials in the primary roughing is 37-50%.
(6) The fine cassiterite flotation operation in the fine cassiterite sorting system is a conventional one-coarse three-scavenging three-fine sorting flow structure, the selected weight concentration is 30-40%, the coarse selection is added with 100-400g/t of regulator sodium carbonate, 500g/t of activator 200-used for development and production (code is 'KT-53') at university of Kunming technology, 2000g/t of cassiterite collector (the ratio of the cassiterite collector is JSY-20: YT-1-3: 1, wherein the code is 'JSY-20' cassiterite collector for development and production by Hubei Jingzhou medicament company, the code is 'YT-1' cassiterite collector for production by Hunan Yongtuo medicament company), and tributyl phosphate 40-150g/t and pine oil 20-80g/t of auxiliary collector (code is 'P86'), one, two or three-scavenging three-fine selecting flow structures are adopted, the weight concentration is 30-40%, and the weight concentration of the, And (3) adding 80-200g/t, 30-100g/t and 20-80g/t of cassiterite collecting agents into the second scavenging and first selecting step, adding no agents into other selecting operations, and selecting for 6-15min in each operation.
(7) The method also comprises the steps of crushing and grinding the raw ore until the content of the granularity of 0.074mm below the weight percentage is 65-75% and the concentration is 35-40%, firstly sorting other metal sulfide minerals by adopting a flotation method, removing magnet minerals from tailings after sorting other metal sulfide minerals by adopting a magnetic separation method, respectively obtaining concentrate products such as other metal sulfide minerals and magnetite and magnetic separation tailing materials, and then carrying out cassiterite sorting.
The invention is characterized in that:
(1) and through pre-grading, the graded materials are respectively sorted into thick and thin tin-containing materials by adopting a corresponding beneficiation method and a corresponding equipment system, and the pertinence is strong.
(2) The spiral chute has the characteristics of large processing capacity, low lower limit of the granularity of the recovered heavy minerals, preselection and improvement of the selected grade, and realization of the back-to-back sorting of partial size fractions; the shaking table has the characteristic of high concentration ratio of the sorting grade, the shaking table bed surfaces of different bed strip types are optimally configured according to the characteristics of the selected materials, and the specific shaking table equipment is matched with the characteristics of the materials, so that the sorting efficiency is high, and the operation recovery rate is favorably improved; the invention adopts the combined application of the spiral chute and the shaking table, exerts the characteristics of the spiral chute and the shaking table to recover coarse-grained cassiterite and improves the recovery rate.
(3) Coarse-grade cassiterite is sorted step by adopting a combined process combining 'heavy-floating-heavy', coarse scavenging ensures that the recovery rate only produces cassiterite rough concentrate, resource waste is avoided, the rough concentrate is further refined, the quality of the concentrate is promoted to be improved, and the concentrate meets the requirements of qualified products, and the economic and social benefits are remarkable.
(4) The method has the advantages that pyrite substances influencing separation of the cassiterite are removed from selected materials step by step, the influence of sulfide ores on separation effect and recovery rate of the cassiterite in the process of separating the cassiterite minerals by a spiral chute and a table concentrator is reduced, separation of the cassiterite and gangue minerals is promoted by using the characteristic that density of the sulfide minerals is close to that of the cassiterite minerals, then the cassiterite and the sulfide minerals are separated thoroughly by using the flotation characteristic difference, the gangue, the sulfide minerals and the cassiterite are separated step by step, loss of tin metals in the sulfide minerals and the gangue is reduced, and quality of the cassiterite concentrate is gradually improved.
The invention has the beneficial effects that:
(1) according to the invention, the coarse and fine separation conditions of +0.037mm coarse-fraction cassiterite gravity separation and-0.037 mm fine-fraction cassiterite flotation are established through the pre-classification of the cyclone, and the coarse-fraction stanniferous material is screened by the vibrating screen to realize direct tailing discarding of the oversize coarse-fraction gangue material, so that the ore amount entering the coarse-fraction gravity separation process can be reduced, the number of shaking tables is reduced, and the production cost can be reduced.
(2) The invention adopts the combination of the gravity separation equipment of the spiral chute and the shaking table, not only concentrates the selected grade of the coarse-grained cassiterite, but also utilizes the chute to classify the-0.037 mm-grained materials contained in the coarse-grained materials, and the coarse-grained materials are further separated into narrow-grained materials which are beneficial to the configuration and the separation of the shaking table process equipment through chute pre-selection, thereby realizing the grouping of the grain grades and adopting different types and quantity configurations to optimize and classify corresponding to the corresponding grain compositions.
(3) The coarse tin flotation process combining flotation and gravity concentration is adopted, so that the operation control precision of a cassiterite coarse scavenging table and the grade of coarse tin concentrate can be reduced, and the recovery rate of coarse tin concentrate is effectively improved; and meanwhile, pyrite influencing the heavy separation of the cassiterite is further removed through a flotation desulfurization process, qualified cassiterite concentrate products are concentrated and refined again on the tin rough concentrate by utilizing the characteristic of high concentration ratio of the table concentrator, tailings of the concentrating table concentrator return to the process of the chute concentrate table concentrator for recycling and recleaning, and the loss of tin metal in intermediate products is avoided.
(4) The process method of the invention obviously improves the grade and the recovery rate of the cassiterite concentrate after industrial application compared with the full-size gravity separation process, obviously reduces the quantity of the table concentrator, and has obvious advantages in corresponding technical and economic indexes and economic benefits compared with similar mines or conventional cassiterite separation processes.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
Example 1: the zinc-tin-copper multi-metal sulfide ore in some places in Yunnan province is subjected to cassiterite ore dressing by applying the method of the invention:
1. raw ore property conditions:
the native ore belongs to the primary zinc-tin-copper multi-metal symbiotic ore with lower oxidation degree, and the metal minerals in the ore mainly comprise pyrrhotite and then chalcopyrite, sphalerite and cassiterite; the gangue minerals are mainly chlorite, and are secondarily amphibole, pyroxene, quartz, biotite, calcite and the like. 2.5-4.0% of zinc grade, 0.20-0.40% of tin grade, 0.10-0.22% of copper grade, 10-18% of iron grade and 4.0-8.5% of sulfur grade of raw ore; the cassiterite is mainly cassiterite, a small amount of nosema tin and acid soluble tin, the cassiterite occupancy rate reaches more than 80%, the cassiterite mainly coexists with minerals such as pyrrhotite, magnalium garnet, chlorite, diopside, quartz and the like, the cassiterite embedding particle size is distributed between 0.074mm and 0.002mm, most of the cassiterite is pockmarked and sparsely or densely distributed in gangue, the embedding particle size of the cassiterite is fine, and the particle size of more than 70% of the cassiterite is less than 0.02 mm. Under the condition of raw ore grinding granularity of-200 meshes and 67-71% of content, cassiterite exists in a monomer and is dissociated by about 50%, and partial cassiterite is continuously grown with gangue, sphalerite and pyrrhotite minerals.
2. The mineral processing process flow is as follows:
the original process flow is as follows: copper flotation → zinc flotation → iron tapping by magnetic separation → desulfurization by flotation → tin selection by table concentrator.
The beneficiation method is applied to the field, and the process flow is changed into the following steps: copper flotation → zinc flotation → iron tapping by magnetic separation → pre-classification → flotation desulfurization → coarse grain gravity separation and fine grain flotation' tin separation process, namely the tin separation process is as follows: +0.037mm coarse grain vibrating screen grading and tailing discarding → chute + shaking table rough scavenging → tin rough concentrate flotation and desulfurization + shaking table concentration; -0.037mm fine grade cassiterite flotation, as shown in figure 1, the method of this example comprises the following specific steps:
(1) firstly, the weight concentration of the tin-containing polymetallic sulphide ore material is adjusted to 17%, then a phi 250mm type swirler is adopted to pre-classify the tin-containing polymetallic sulphide ore in the size fraction of +/-0.037 mm, the operating pressure of the swirler is ensured to be 0.08MPa, and a +0.037mm material and a-0.037 mm material are obtained, and the size fraction and metal distribution parameters of each product are detailed in table 1. The fine cassiterite separation system comprises a classification cyclone, operations such as desliming of the fine cassiterite, fine desulfurization and fine cassiterite flotation, wherein the fine cassiterite flotation operation is a conventional one-coarse-three-scavenging three-fine flow structure, the concentration of the selected weight is 35-40%, regulators such as sodium carbonate 200g/t, KT-53 activators 300g/t, cassiterite collectors (JSY-19: YT-1: 3:1)1300 g/t, auxiliary collectors such as P8660 g/t and 30g/t of pine oil are added in the course separation, 100g/t of cassiterite collectors are added in the course separation, 30g/t of cassiterite collectors are added in the course separation, 40g/t of cassiterite collectors are added in the course separation, no agent is added in other selection operations, the separation time of each operation in the course separation section is 8-12min, the sorting time of each operation of the fine sorting section is 6-8 min.
TABLE 1 product size fraction and metal distribution for preliminary classification
(2) The plus 0.037mm material in the step (1) is subjected to coarse grain desulfurization flotation, the coarse grain desulfurization flotation operation comprises a primary roughing process, a secondary scavenging process and a secondary concentration process, the concentration of the roughing fed material is 37 percent, the total consumption of all reagents in the coarse grain desulfurization flotation operation is respectively 1000g/t (by the amount of the fed dry ore) of activating agent concentrated sulfuric acid, 60g/t (by the amount of the fed dry ore) of DF-336 desulfurization collecting agent and 30g/t (by the amount of the fed dry ore) of pine oil foaming agent, wherein the addition of all reagents in the roughing operation is 70 percent of the total consumption, the addition of all reagents in the secondary scavenging operation is 30 percent of the total consumption, no reagent is added in the concentration, the flotation time in each section is 10min, sulfur concentrate A and tailings are obtained through the coarse grain desulfurization flotation, the tailings enter a vibration screen classification operation, and the classification size of the vibration screen is selected to be 0.106mm, obtaining oversize coarse gangue materials with the particle size of plus 0.106mm and undersize tin-containing materials with the particle size of minus 0.106mm, wherein the oversize coarse gangue materials with the particle size of plus 0.106mm are directly thrown to the tail, and coarse gangue minerals with the yield of 10-12% and tin-containing metal of the yield of 10-12% relative to raw ore are thrown;
(3) the undersize tin-containing materials in the step (2) are separated, enriched and classified by adopting a spiral chute with the diameter phi of 900mm to obtain chute concentrate, chute middlings and chute tailings, the grain size and metal distribution conditions of the products are detailed in a table 2, the chute tailings enter a fine-grain cassiterite separation system, the chute concentrate and the chute middlings enter a table concentrator for rough scavenging operation, and the specific process structure and the configuration parameters of process equipment are as follows:
firstly, carrying out table roughing on the chute concentrate, controlling the granularity of the selected materials of a chute concentrate roughing table to be mainly-0.106 mm- +0.063mm, controlling the selected weight concentration to be 33%, and selecting a' coarse sand bed: a wave-shaped bed: fine sand bed: carrying out configuration separation on a tin cloud type shaking table with a grooving bed being 1:2:2:2 "to respectively obtain tin rough concentrate I, inferior concentrate I, middling I and tailings I; the method comprises the following steps of roughly selecting chute middlings by a table concentrator, adjusting and controlling the granularity of selected materials of the chute middlings to be-0.063 mm- +0.037mm, controlling the selected weight concentration to be 30%, and selecting a' waveform bed: fine sand mold: groove carving: and (3) carrying out configuration separation on the fine mud bed by a cloud tin type table concentrator in a ratio of 1:1:2:3 "to respectively obtain a tin rough concentrate II, a secondary concentrate II, a middling II and a tailing II.
Secondly, mixing the chute concentrate, middlings I and middlings II obtained by rough concentration of a chute middling table and then entering a comprehensive middling bed for scavenging, wherein the concentration of the selected middling is 25%, and a coarse sand bed is selected: fine sand mold: groove carving: carrying out configuration separation on a fine mud bed (1: 3:2: 1) by a cloud tin type table concentrator to obtain tin rough concentrate III, secondary concentrate III, middling III and tailings III; mixing the chute concentrate, tailings I obtained by rough concentration of a chute middling table and tailings II, and then carrying out tailings scavenging on the mixture in a tailings bed, wherein the concentration of the selected tailings is 15%, and a fine sand type is selected: groove carving: and (3) carrying out configuration separation on a fine mud bed (2: 3: 2) by using a cloud tin type shaking table to obtain tin rough concentrate IV, secondary concentrate IV, middling IV and tailings IV, wherein the middling III, the middling IV, the tailings III and the tailings IV are combined to form shaking table rough scavenging tailings which are directly thrown.
And further, mixing the first secondary concentrate I, the second secondary concentrate II, the third secondary concentrate III and the fourth secondary concentrate, and performing scavenging on the mixture in a first secondary concentrate bed, wherein the concentration of the selected concentration by weight is 28%, and a coarse sand bed is selected: a wave-shaped bed: groove carving: carrying out configuration separation on a fine mud bed (2: 2:2: 1) by a cloud tin type table concentrator to obtain a tin rough concentrate V, a secondary concentrate V, a middling V and a tailing V; and mixing the middling V and the tailings V, and then carrying out scavenging on the mixture in a secondary concentrate secondary bed, wherein the concentration of the selected weight is 20%, and a coarse sand bed is selected: fine sand bed: groove carving: carrying out configuration sorting on a fine mud bed (1: 2:3: 1) by a cloud tin type shaking table to obtain a tin rough concentrate VI, a secondary concentrate VI, a middling VI and a tailing VI; then mixing the middling VI and the tailings VI, and then entering a comprehensive middling bed for circular recleaning, wherein the secondary concentrate V and the secondary concentrate VI are both returned to the primary concentrate for circular recleaning on a first-stage bed; preferentially, the materials entering the first-stage bed of the secondary concentrate and the comprehensive middle ore bed are concentrated by a thickener, the underflow of the thickener is classified by a cyclone group with the diameter of 250mm, the classified cyclone sand setting is further reground by a vertical stirring mill, and the overflow of the cyclone is combined with the ore discharge of the vertical stirring mill and then enters the first-stage bed of the secondary concentrate and the middle ore bed respectively. And finally, combining the tin rough concentrates I-VI obtained by the rough scavenging operation shaking tables to obtain the tin rough concentrate A.
TABLE 2 product size fraction and metal distribution for spiral chute operation
(4) Concentrating the tin rough concentrate A in the step (3), performing flotation desulfurization treatment, wherein the concentration of the roughing material is 50%, performing primary roughing, three times of scavenging and three times of fine concentration, the flotation time of each operation is 12min, the total consumption of the reagents is 4000g/t (calculated by dry ore) of concentrated sulfuric acid as an activator, 150g/t (calculated by dry ore) of DF-336 desulfurization collector, 70g/t (calculated by dry ore) of pine oil as a foaming agent, the additive amount of each reagent in the roughing operation is 80% of the total consumption of each reagent, the additive amount of each reagent in the third scavenging operation is 20% of the total consumption of each reagent, no reagent is added in the third concentrating operation, so that the sulfur concentrate B and the desulfurized tin rough concentrate B are obtained, the sulfur concentrate A and the sulfur concentrate B are mixed to obtain final sulfur concentrate, the tin rough concentrate B enters the concentrating operation of a table, and the specific flow of the concentrating operation of the table is as follows: adopting a tin cloud shaking table to perform primary roughing and twice scavenging, wherein the concentration of the primary roughing through the shaking table is 18%, and the primary roughing through the shaking table selects a coarse sand bed: a wave-shaped bed: a grooving bed: sorting the fine mud bed by configuration of a cloudy tin type shaking table with the ratio of 1:3:2: 1' to obtain rougher concentrate and rougher tailings with tin content of 40-45%; concentrating the roughed tailings until the concentration is 16%, and then entering a scavenging shaking table for operation, wherein a 'waveform bed' is selected: fine sand bed: a grooving bed: sorting by using a cloud tin type shaking table with a fine mud bed of 2:2:2: 1' to obtain a scavenging-one concentrate and a scavenging-one tailing with tin content of 37-40%; concentrating the first scavenging tailings until the concentration is 13%, and then entering a second scavenging shaking table for operation, wherein the second scavenging shaking table for operation selects a' wave-shaped bed: a grooving bed: and (3) sorting by configuring a cloud tin type shaking table with a fine mud bed being 3:3: 1' to obtain second scavenged concentrate and second scavenged tailings with the tin content of 33-38%, returning the second scavenged tailings (with the tin content of 0.4-0.8%) to the first-stage bed of secondary concentrate in the rough scavenging operation of the shaking table in the step (3) for circular recleaning, and mixing the rough concentrate, the first scavenged concentrate and the second scavenged concentrate to obtain the final coarse-grained tin concentrate (with the tin content of 39-41%).
3. After the process method is applied to the cassiterite separation process in the zinc-tin-copper multi-metal sulfide ore, the technical parameters and the separation indexes obtained by number and quality examination according to the key process flow structure are detailed in a table 3.
TABLE 3 technical parameters of cassiterite separation process and tin-selecting index results in zinc-tin-copper multi-metal sulfide ore in Yunnan
4. The method of the invention adopts the comparison of the tin indexes before and after application:
the comparison results of the tin selection technical indexes before and after the method is applied to the cassiterite selection process in the multi-metal sulphide ore of zinc, tin and copper are detailed in the table 4. As can be seen from the data in Table 4, after the method is applied to the process flow, the recovery rate of the tin concentrate is improved by 5.80 percent compared with 45.22 percent before the application, and the technical effect is obvious.
Table 4 comparison table of indexes before and after application of the process of the present invention in the process of separating cassiterite from zinc-tin-copper multi-metal sulfide ore in somewhere in Yunnan province
Example 2: the method is applied to the copper-tin sulfide ore in a certain place in Yunnan to perform cassiterite beneficiation:
1. the properties of raw ore:
the raw ore belongs to primary copper-tin paragenic ore, and the metal minerals in the ore mainly comprise chalcopyrite, and then comprise pyrrhotite, magnetite and cassiterite; the gangue minerals are mainly quartz and calcite, and secondly pyroxene and biotite. Raw ore contains 0.4-1.0% of copper, 0.12-0.25% of tin, 5-10% of iron and 2.0-4.0% of sulfur; the tin mineral is mainly cassiterite, the occupancy rate of the cassiterite reaches more than 95%, and the embedded particle size distribution of the cassiterite is between 0.053mm and 0.02 mm. Under the condition of the raw ore grinding granularity of-200 meshes and the content of 62-72%, cassiterite exists in a monomer and is dissociated by about 65%.
2. The mineral processing process flow is as follows:
before the application of the invention: copper flotation → iron tapping by magnetic separation → desulfurization by flotation → tin separation by shaking table.
After the invention is applied: the method comprises the following steps of copper flotation, magnetic separation and tapping, pre-grading, fine mud desliming and tailing discarding, flotation and desulfurization, vibrating screening and grading coarse-grained gangue and tailing discarding, spiral chute, table tin selection, tin rough concentrate desulfurization and desulfurized tin rough concentrate table concentration, and comprises the following specific steps:
(1) crushing and grinding raw ores until the granularity content of-0.074 mm accounts for 65% by weight and the concentration is 34% by weight, firstly performing copper mineral flotation by adopting a flotation method, removing magnet minerals from copper tailings by adopting a magnetic separation method to obtain 2 concentrate products of copper and iron and magnetic tailings materials, pre-classifying the magnetic tailings in a +/-0.037 mm grade by adopting a phi 300mm type swirler, ensuring that the operating pressure of the swirler is 0.10MPa, obtaining a +0.037mm material and a-0.037 mm material, further performing desliming on the magnetic tailings by adopting a phi 75mm type swirler, feeding settled sand after desliming into a fine cassiterite flotation system, and directly throwing-0.010 mm ore mud after desliming into a tailing treatment;
(2) performing coarse grain desulfurization flotation on the material with the thickness of 0.037mm in the step (1) to remove pyrite, wherein the coarse grain desulfurization flotation operation comprises the process flows of primary roughing, secondary scavenging and secondary concentration, the concentration of the roughing fed material is 42%, the total consumption of all reagents in the coarse grain desulfurization flotation operation is respectively 1500g/t (calculated by the fed dry ore), 40g/t (calculated by the fed dry ore) of DF-336 desulfurization collecting agent and 30g/t (calculated by the fed dry ore) of a pine oil foaming agent, the addition of all reagents in the roughing operation is 90% of the total consumption, the addition of all reagents in the secondary scavenging operation is 10% of the total consumption, no reagent is added in the concentration, the flotation time of each operation in the roughing scavenging section is 8min, the flotation time of each operation in the concentration section is 5min, and sulfur concentrate A and tailings are obtained through desulfurization flotation, enabling tailings to enter a vibrating screen grading operation, and selecting the grading size of the vibrating screen to be 0.125mm to obtain oversize coarse-grained gangue materials with the particle size of +0.125mm and undersize tin-containing materials with the particle size of-0.125 mm, wherein the oversize coarse-grained gangue materials with the particle size of +0.125mm are directly thrown to the tail;
(3) the undersize stanniferous material of step (2) adopts the spiral chute of diameter phi 1200mm type to select separately the enrichment and grade, obtain chute concentrate, chute middlings and chute tailings, the chute tailings enters the fine particle cassiterite and selects the system, chute concentrate, chute middlings enter the rough scavenging operation of shaking table, the concrete flow structure, technological parameter and equipment are disposed:
firstly, carrying out table roughing on the chute concentrate and the chute middling respectively, wherein the material granularity of the chute concentrate is ensured to be-0.125 mm- +0.063mm, the selected weight concentration is 34%, and a' coarse sand bed: a wave-shaped bed: fine sand bed: carrying out configuration separation on a tin cloud type shaking table with a grooving bed being 1:2:2:2 "to respectively obtain tin rough concentrate I, inferior concentrate I, middling I and tailings I; the method comprises the following steps of roughly selecting chute middlings by a table concentrator, adjusting and controlling the granularity of selected materials of the chute middlings to be-0.063 mm- +0.037mm, controlling the selected weight concentration to be 32%, and selecting a' waveform bed: fine sand mold: groove carving: and (3) carrying out configuration separation on the fine mud bed by a cloud tin type table concentrator in a ratio of 1:1:2:3 "to respectively obtain a tin rough concentrate II, a secondary concentrate II, a middling II and a tailing II. Secondly, mixing the chute concentrate, middlings I and middlings II obtained by rough concentration of a chute middling table and then entering a comprehensive middling bed for scavenging, wherein the selected weight concentration is 27%, and a coarse sand bed is selected: fine sand mold: groove carving: carrying out configuration separation on a fine mud bed (1: 3:2: 1) by a cloud tin type table concentrator to obtain tin rough concentrate III, secondary concentrate III, middling III and tailings III; mixing the chute concentrate, tailings I obtained by rough concentration of a chute middling table and tailings II, and then carrying out tailings scavenging on the mixture in a tailings bed, wherein the concentration of the selected tailings is 20%, and a fine sand type is selected: groove carving: and (3) carrying out configuration separation on a fine mud bed (2: 3: 2) by using a cloud tin type shaking table to obtain tin rough concentrate IV, secondary concentrate IV, middling IV and tailings IV, wherein the middling III, the middling IV, the tailings III and the tailings IV are combined to form shaking table rough scavenging tailings which are directly thrown.
And further, mixing the first secondary concentrate I, the second secondary concentrate II, the third secondary concentrate III and the fourth secondary concentrate, and performing scavenging on the mixture in a first secondary concentrate bed, wherein the concentration of the selected concentrate is 30%, and a coarse sand bed is selected: a wave-shaped bed: groove carving: carrying out configuration separation on a fine mud bed (2: 2:2: 1) by a cloud tin type table concentrator to obtain a tin rough concentrate V, a secondary concentrate V, a middling V and a tailing V; and mixing the middling V and the tailings V, and then carrying out scavenging on the mixture in a secondary concentrate secondary bed, wherein the concentration by weight of the selected mixture is 23%, and a coarse sand bed is selected: fine sand bed: groove carving: carrying out configuration sorting on a fine mud bed (1: 2:3: 1) by a cloud tin type shaking table to obtain a tin rough concentrate VI, a secondary concentrate VI, a middling VI and a tailing VI; then mixing the middling VI and the tailings VI, and then entering a comprehensive middling bed for circular recleaning, wherein the secondary concentrate V and the secondary concentrate VI are both returned to the primary concentrate for circular recleaning on a first-stage bed; preferentially, the materials entering the first-stage bed of the secondary concentrate and the comprehensive middle ore bed are concentrated by a thickener, the underflow of the thickener is classified by a cyclone group with the diameter of 300mm, the classified cyclone sand setting is further reground by a vertical stirring mill, and the overflow of the cyclone is combined with the ore discharge of the vertical stirring mill and then enters the first-stage bed of the secondary concentrate and the middle ore bed respectively. And finally, combining the tin rough concentrates I-VI obtained by the rough scavenging operation shaking tables to obtain the tin rough concentrate A.
(4) Concentrating the tin rough concentrate A in the step (3), performing flotation desulfurization treatment, wherein the concentration of the roughing material is 37%, performing primary roughing, secondary scavenging and secondary concentration, the flotation time of each operation is 6-8min, the total consumption of the reagents is 1500g/t (calculated by dry ore) of concentrated sulfuric acid serving as an activator, 70g/t (calculated by dry ore) of DF-336 desulfurization collector, 40g/t (calculated by dry ore) of pine oil serving as a foaming agent, the addition of each reagent in the roughing operation is 85% of the total consumption of each reagent, the addition of each reagent in the secondary scavenging operation is 15% of the total consumption of each reagent, no reagent is added in the secondary concentration, so that the sulfur concentrate B and the desulfurized tin rough concentrate B are obtained, the sulfur concentrate B and the sulfur concentrate A are mixed to obtain final sulfur concentrate, the tin rough concentrate B enters the concentrating operation of a table, and the specific flow of the concentrating operation of the table is as follows: the concentration of the coarse selection of the primary shaking table is 15 percent, and a coarse sand bed is selected: a wave-shaped bed: a grooving bed: sorting the fine mud bed by configuration of a yunzin type table concentrator with a ratio of 1:3:2: 1' to obtain roughed concentrate and roughed tailings with tin grade of 39-43%; concentrating the roughed tailings until the concentration is 13%, and then entering a scavenging shaking table for operation, wherein a 'waveform bed' is selected: fine sand bed: a grooving bed: sorting by using a cloud tin type shaking table with the fine mud bed being 2:2:2: 1' to obtain a scavenging-one concentrate and a scavenging-one tailing with the tin grade of 36-42%; concentrating the first scavenging tailings until the concentration is 12%, and then entering a second scavenging shaking table for operation, wherein the second scavenging shaking table for operation selects a' wave-shaped bed: a grooving bed: and (3) sorting by configuring a cloud tin type shaking table with a fine mud bed being 3:3: 1' to obtain second scavenged concentrate and second scavenged tailings with the tin content of 35-38%, returning the second scavenged tailings (with the tin content of 0.3-0.5%) to the first-stage bed of secondary concentrate in the rough scavenging operation of the shaking table in the step (3) for recycling, and mixing the rough concentrate, the first scavenged concentrate and the second scavenged concentrate to obtain the final coarse tin concentrate (with the tin content of 39-44%).
After the method is applied to the cassiterite separation process in the cuprum-stannum sulfide ore, the recovery rate of the tin concentrate is improved by 3.8 percent compared with that before the method is applied, and the technical effect is obvious.
Example 3: the method is applied to tin selection of cassiterite polymetallic sulphide ores in somewhere in Guangxi: the raw ore contains useful metals of tin, zinc, lead, antimony and indium, the cassiterite is based on coarse cassiterite, and the method is adopted to carry out coarse-fraction cassiterite separation, and comprises the following specific steps:
(1) crushing and grinding raw ores until the content of the granularity of-0.074 mm accounts for 70% by weight and the concentration is 40% by weight, performing flotation of sulfide ores in advance by adopting a flotation method, performing pre-classification on flotation tailings of the sulfide ores in a +/-0.037 mm size fraction by adopting a phi 250mm type cyclone, ensuring that the operating pressure of the cyclone is 0.12MPa, and obtaining a material with the size of +0.037mm and a material with the size of-0.037 mm, and enabling the material with the size of-0.037 mm to enter a fine cassiterite sorting system;
(2) performing coarse grain desulfurization and flotation on the material with the thickness of 0.037mm in the step (1), wherein the coarse grain desulfurization and flotation operation comprises the process flows of primary roughing, secondary scavenging and secondary concentration, the concentration of the roughing fed material is 50%, the total consumption of all reagents in the coarse grain desulfurization and flotation operation is respectively 4000g/t (calculated by the fed dry ore), 200g/t (calculated by the fed dry ore) of DF-336 desulfurization collecting agent and 100g/t (calculated by the fed dry ore) of pine oil foaming agent, wherein the addition of all reagents in the roughing operation is 85% of the total consumption, the addition of all reagents in the secondary scavenging operation is 15% of the total consumption, no reagent is added in the concentration, the flotation time in each section is 7min, sulfur I and tailings are obtained through coarse grain desulfurization and flotation, the tailings enter a vibrating screen for classification operation, and the classification size of the vibrating screen is selected to be 0.180mm, obtaining oversize coarse-grained gangue materials with the particle size of plus 0.180mm and undersize tin-containing materials with the particle size of minus 0.180mm, wherein the oversize coarse-grained gangue materials with the particle size of plus 0.180mm are directly thrown to the tail;
(3) the undersize stanniferous material of step (2) adopts the spiral chute of diameter phi 1200mm type to select separately the enrichment and grade, obtains chute concentrate, chute middlings and chute tailings, and the chute tailings gets into the fine grain cassiterite system of grading, and chute concentrate, chute middlings get into the operation of shaking table rough scavenging, and specific flow is:
firstly, carrying out table roughing on the chute concentrate and the chute middling respectively, wherein the material granularity of the chute concentrate is ensured to be-0.180 mm- +0.063mm, the selected weight concentration is 30%, and a' coarse sand bed: a wave-shaped bed: fine sand bed: carrying out configuration separation on a tin cloud type shaking table with a grooving bed being 1:2:2:2 "to respectively obtain tin rough concentrate I, inferior concentrate I, middling I and tailings I; the method comprises the following steps of roughly selecting chute middlings by a table concentrator, adjusting and controlling the granularity of selected materials of the chute middlings to be-0.063 mm- +0.019mm, controlling the selected weight concentration to be 25%, and selecting a' waveform bed: fine sand mold: groove carving: and (3) carrying out configuration separation on the fine mud bed by a cloud tin type table concentrator in a ratio of 1:1:2:3 "to respectively obtain a tin rough concentrate II, a secondary concentrate II, a middling II and a tailing II. Secondly, mixing the chute concentrate, middlings I and middlings II obtained by rough concentration of a chute middling table and then entering a comprehensive middling bed for scavenging, wherein the selected weight concentration is 32%, and a coarse sand bed is selected: fine sand mold: groove carving: carrying out configuration separation on a fine mud bed (1: 3:2: 1) by a cloud tin type table concentrator to obtain tin rough concentrate III, secondary concentrate III, middling III and tailings III; mixing the chute concentrate, tailings I obtained by rough concentration of a chute middling table and tailings II, and then carrying out tailings scavenging on the mixture in a tailings bed, wherein the concentration by weight of the selected tailings is 23%, and a fine sand type is selected: groove carving: and (3) carrying out configuration separation on a fine mud bed (2: 3: 2) by using a cloud tin type shaking table to obtain tin rough concentrate IV, secondary concentrate IV, middling IV and tailings IV, wherein the middling III, the middling IV, the tailings III and the tailings IV are combined to form shaking table rough scavenging tailings which are directly thrown.
And further, mixing the first secondary concentrate I, the second secondary concentrate II, the third secondary concentrate III and the fourth secondary concentrate, and performing scavenging on the mixture in a first secondary concentrate bed, wherein the concentration of the selected concentrate is 35%, and a coarse sand bed is selected: a wave-shaped bed: groove carving: carrying out configuration separation on a fine mud bed (2: 2:2: 1) by a cloud tin type table concentrator to obtain a tin rough concentrate V, a secondary concentrate V, a middling V and a tailing V; and mixing the middling V and the tailings V, and then carrying out scavenging on the mixture in a secondary concentrate secondary bed, wherein the concentration by weight of the selected mixture is 27%, and a coarse sand bed is selected: fine sand bed: groove carving: carrying out configuration sorting on a fine mud bed (1: 2:3: 1) by a cloud tin type shaking table to obtain a tin rough concentrate VI, a secondary concentrate VI, a middling VI and a tailing VI; then mixing the middling VI and the tailings VI, and then entering a comprehensive middling bed for circular recleaning, wherein the secondary concentrate V and the secondary concentrate VI are both returned to the primary concentrate for circular recleaning on a first-stage bed; preferentially, the materials entering the first-stage bed of the secondary concentrate and the comprehensive middle ore bed are concentrated by a thickener, the underflow of the thickener is classified by a cyclone group with the diameter of 300mm, the classified cyclone sand setting is further reground by a vertical stirring mill, and the overflow of the cyclone is combined with the ore discharge of the vertical stirring mill and then enters the first-stage bed of the secondary concentrate and the middle ore bed respectively. And finally, combining the tin rough concentrates I-VI obtained by the rough scavenging operation shaking tables to obtain the tin rough concentrate A.
(4) Concentrating the tin rough concentrate I in the step (3), performing flotation desulfurization treatment, wherein the concentration of the roughing material is 38%, performing primary roughing, secondary scavenging and secondary concentration, the flotation time of each section is 6min, the total consumption of the reagents is 4000g/t (calculated by dry ore) of concentrated sulfuric acid as an activator, 200g/t (calculated by dry ore) of DF-336 desulfurization collecting agent, 100g/t (calculated by dry ore) of pine oil as a foaming agent, the addition of each reagent in the roughing operation is 60 percent of the total consumption of each reagent, the addition of each reagent in the secondary scavenging operation is 40 percent of the total consumption of each reagent, no reagent is added in the secondary concentration, each sulfur concentrate II and the desulfurized tin rough concentrate II are obtained, the sulfur concentrate II is mixed with the sulfur concentrate I to obtain final sulfur concentrate, the tin rough concentrate II enters the concentrating operation of a table, and the specific flow of the concentrating operation of the table is as follows: adopting a tin cloud shaking table to perform primary roughing and twice scavenging, wherein the concentration of the primary roughing through the shaking table is 10%, and the primary roughing through the shaking table is performed according to the formula of a coarse sand bed: a wave-shaped bed: a grooving bed: carrying out configuration sorting on a fine mud bed (1: 3:2: 1) cloud tin type shaking table to obtain tin-containing grade roughing concentrate and roughing tailings, concentrating the roughing tailings to 8%, then carrying out scavenging-shaking table operation, and carrying out classification on the fine mud bed according to a waveform bed: a grooving bed: and (3) configuring a cloud tin type table concentrator of which the fine mud bed is 3:3:1 for sorting to obtain first scavenging concentrate and first scavenging tailings, concentrating the first scavenging tailings to the concentration of 12%, and then feeding the first scavenging tailings into a second table concentrator for operation, wherein the concentration of the first scavenging tailings is determined according to the formula of a' wave bed: a grooving bed: and (3) configuring a cloud tin type shaking table with a fine mud bed being 2:2: 3' for sorting to obtain second scavenged concentrate and second scavenged tailings, returning the second scavenged tailings to the rough scavenging operation of the shaking table in the step (3), performing circulating recleaning, and mixing the rough concentrate, the first scavenged concentrate and the second scavenged concentrate to obtain the final coarse-grained tin concentrate (the tin grade is 38-45%).
After the method is applied to the cassiterite multi-metal sulfide ore, the recovery rate of tin concentrate is improved by 4.59 percent compared with that before the application, and the technical effect is obvious.
Example 4: the method of the embodiment is the same as that in the embodiment 3, except that in the step (4), the tin rough concentrate I is concentrated and then subjected to flotation desulfurization treatment, and primary roughing, secondary scavenging and secondary concentration are performed, wherein the addition amount of each reagent in the roughing operation is 80% of the total consumption amount of each reagent, the addition amount of each reagent in the secondary scavenging operation is 20% of the total consumption amount of each reagent, and no reagent is added in the secondary concentration, so that a sulfur concentrate II and a desulfurized tin rough concentrate II are obtained.
After the treatment of the embodiment, the recovery rate of the finally obtained tin concentrate is obviously improved by 4.69 percent compared with the recovery rate of the tin concentrate before the application of the invention.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. The beneficiation method for the coarse-grained cassiterite in the tin-containing multi-metal sulphide ore is characterized by comprising the following steps of firstly pre-grading the tin-containing multi-metal sulphide ore, enabling the graded fine-grained cassiterite to enter a fine-grained cassiterite grading system, enabling the graded coarse-grained cassiterite to enter a coarse-grained cassiterite grading process, and finally grading coarse-grained tin concentrate with a tin grade of 38-45% through coarse-grained desulfurization flotation, vibrating screen grading, spiral chute grading, shaking table coarse scavenging, tin coarse concentrate flotation and desulfurization and shaking table concentration in the coarse-grained cassiterite grading process, wherein the specific steps of the beneficiation method are as follows:
(1) firstly, adjusting the weight concentration of tin-containing polymetallic sulphide ore materials to 17-25%, then carrying out +/-0.037 mm size fraction pre-classification by using a cyclone, ensuring the operating pressure of the cyclone to be 0.05-0.15 Mpa, obtaining +0.037mm materials and-0.037 mm materials, and enabling the-0.037 mm materials to enter a fine-grain cassiterite sorting system;
(2) performing coarse grain desulfurization flotation on the material with the grain size of +0.037mm obtained in the step (1) to obtain sulfur concentrate A and tailings, performing classification operation on the tailings by using a vibrating screen, selecting the classification size of the vibrating screen to be 0.106-0.180 mm to obtain an oversize coarse grain gangue material and an undersize tin-containing material, and directly discarding the oversize coarse grain gangue material;
(3) performing spiral chute sorting, enrichment and grading on the undersize stanniferous materials obtained in the step (2) to obtain chute concentrates, chute middlings and chute tailings, enabling the chute tailings to enter a fine-grain cassiterite sorting system, enabling the chute concentrates and the chute middlings to enter shaking table rough scavenging operation to finally obtain stannum rough concentrates A and shaking table rough scavenging tailings, and directly throwing tails by using the shaking table rough scavenging tailings;
(4) and (3) concentrating the tin rough concentrate A in the step (3), and then carrying out flotation desulfurization treatment to obtain a sulfur concentrate B and a desulfurized tin rough concentrate B, mixing the sulfur concentrate A and the sulfur concentrate B to obtain a final sulfur concentrate, carrying out table concentration operation on the tin rough concentrate B to obtain coarse-grained tin concentrate with tin grade of 38-45% and table concentration tailings, and returning the table concentration tailings to the table rough scavenging operation in the step (3) to form closed cycle.
2. The method for beneficiating coarse fraction cassiterite from tin-bearing polymetallic sulphide ores according to claim 1, characterized in that: the concrete flow of the chute concentrate and the chute middlings entering the table rough scavenging operation in the step (3) is as follows:
firstly, carrying out table roughing on chute concentrates to respectively obtain tin rough concentrates I, inferior concentrates I, middlings I and tailings I, carrying out table roughing on chute middlings to respectively obtain tin rough concentrates II, inferior concentrates II, middlings II and tailings II, then mixing the chute concentrates and the middlings I and II obtained by table roughing of the chute middlings and entering a comprehensive middling bed for scavenging to obtain tin rough concentrates III, inferior concentrates III, middlings III and tailings III, mixing the chute concentrates and the tailings I and II obtained by table roughing of the chute middlings and the tailings II and entering a tailing bed for scavenging to obtain tin rough concentrates IV, inferior concentrates IV, middlings IV and tailings IV, wherein the middlings III, the middlings IV, the middlings III, the tailings III and the tailings IV are combined to form table roughing tailings, directly throwing tailings, the inferior concentrates I, the inferior concentrates II, the inferior concentrates III and the inferior concentrates IV are mixed and then enter the inferior concentrates bed for primary scavenging, obtaining a tin rough concentrate V, a secondary concentrate V, a middling V and a tailing V, mixing the middling V and the tailing V, and then feeding the mixture into a secondary concentrate secondary bed for scavenging to obtain a tin rough concentrate VI, a secondary concentrate VI, a middling VI and a tailing VI; then mixing the middling VI and the tailings VI, and then entering a comprehensive middling bed for circular recleaning, wherein the secondary concentrate V and the secondary concentrate VI are both returned to the primary concentrate for circular recleaning on a first-stage bed; and finally, combining the tin rough concentrates I-VI obtained by the rough sweeping operation shaking tables to obtain tin rough concentrate A, wherein materials entering the first-stage bed of the secondary concentrate and the comprehensive middle ore bed are concentrated by adopting a thickener or a thickening box before entering, the bottom flow of the thickener or the thickening box is classified by adopting a cyclone respectively, the settled sand of the cyclone after classification is further reground by adopting a vertical stirring mill, the overflow of the cyclone is combined with the ore discharge of the vertical stirring mill and then enters the first-stage bed of the secondary concentrate and the middle ore bed respectively.
3. The method for beneficiating coarse-grained cassiterite from tin-bearing polymetallic sulphide ores according to claim 2, characterized in that:
when the chute concentrate is subjected to table roughing, the granularity of the selected material of the chute concentrate is controlled to be-0.180 mm- +0.063mm, the selected weight concentration is 30-38%, and a coarse sand bed is selected: a wave-shaped bed: fine sand bed: configuring and sorting a cloud tin type shaking table with a grooved bed =1:2:2: 2;
when the chute middlings are subjected to table roughing, the granularity of selected materials of the chute middlings is controlled to be-0.063 mm- +0.037mm, the selected weight concentration is 27-32%, and a wave-shaped bed is selected: fine sand mold: groove carving: carrying out configuration and sorting on a cloud tin type shaking table with the fine mud bed =1:1:2: 3;
the concentration by weight of the material entering the comprehensive middling bed scavenging is 25-32%, and a coarse sand bed is selected: fine sand mold: groove carving: configuring and sorting a cloud tin type shaking table with a fine mud bed =1:3:2:1, wherein the selected weight concentration of materials entering a tailing bed is 15-23%, and a fine sand mold is selected: groove carving: carrying out configuration and sorting on a cloud tin type shaking table with the fine mud bed =2:3: 2;
the concentration by weight of the selected materials entering the first-stage bed separation of the secondary concentrate is 28-35%, and a coarse sand bed is selected: a wave-shaped bed: groove carving: configuring and sorting a fine mud bed =2:2:2:1 cloud tin type table concentrator, wherein the selected weight concentration of the materials entering the secondary concentrate secondary bed for sorting is 20-27%, and a coarse sand bed is selected: fine sand bed: groove carving: and (4) carrying out configuration and sorting on a cloud tin type shaking table with the fine mud bed =1:2:3: 1.
4. The method for beneficiating coarse fraction cassiterite from tin-bearing polymetallic sulphide ores according to claim 1, characterized in that: the specific process of the tin rough concentrate B entering the table concentration operation in the step (4) is as follows:
and (3) carrying out primary roughing and two scavenging by adopting a tin cloud shaking table, wherein the concentration of the selected material of the primary shaking table roughing is 15-20%, roughing concentrate and roughing tailings are obtained through the primary shaking table roughing, the roughing tailings are concentrated and then adjusted to have the concentration of 13-20%, the concentrated material enters a scavenging first shaking table operation to obtain scavenging first concentrate and scavenging first tailings, the scavenging first tailings are concentrated and then adjusted to have the concentration of 10-15%, the scavenging first tailings enter a scavenging second shaking table operation to obtain scavenging second concentrate and scavenging second tailings, the scavenging second tailings are returned to the secondary concentrate in the shaking table roughing operation in the step (3), and the roughing concentrate, the scavenging first concentrate and the scavenging second concentrate are mixed to be used as final coarse tin concentrate.
5. The method according to claim 4, characterized in that: the primary shaking table rough selection adopts a coarse sand bed: a wave-shaped bed: a grooving bed: sorting is carried out by configuring a cloud tin type shaking table with fine mud bed =1:3:2:1, and a wave-shaped bed is selected for the operation of a shaking table: fine sand bed: a grooving bed: sorting by configuration of a cloud tin type shaking table with a fine mud bed =2:2:2:1, and selecting a wave-shaped bed by operation of a second sweeping shaking table: a grooving bed: sorting by configuration of a yunxin type shaking table with fine mud bed =3:3: 1.
6. The method for beneficiating coarse fraction cassiterite from tin-bearing polymetallic sulphide ores according to claim 1, characterized in that: the coarse grain desulfurization flotation in the step (2) and the flotation desulfurization treatment of the tin rough concentrate A in the step (4) comprise primary roughing, at least secondary scavenging and at least secondary concentration, and the reagents used in each flotation process comprise activating agent concentrated sulfuric acid, desulfurization collecting agent DF-336 and foaming agent pine oil, wherein the total consumption of the activating agent concentrated sulfuric acid is 1000-4000g/t in terms of the amount of dry ores to be selected, the total consumption of the DF-336 desulfurization collecting agent is 40-200g/t in terms of the amount of dry ores to be selected, the total consumption of the foaming agent of the pine oil is 30-100g/t in terms of the amount of dry ores to be selected, the addition amount of each reagent in the roughing operation is 60-85% of the total consumption of each reagent, and the addition amount of each reagent in at least secondary scavenging operation is 15-40% of the total consumption of each reagent.
7. The method according to claim 6, characterized in that: the addition amount of each medicament in the primary roughing operation is 75-80% of the total consumption amount of each medicament, and the addition amount of each medicament in at least the secondary scavenging operation is 20-25% of the total consumption amount of each medicament.
8. The method according to claim 6, characterized in that: the flotation time of the primary roughing, the at least secondary scavenging and the at least secondary concentrating is 4-12min, and the concentration of the selected materials in the primary roughing is 37-50%.
9. The method of beneficiation of coarse fraction cassiterite from tin-containing polymetallic sulphide ores according to claim 8, characterized in that: the flotation time of the primary roughing, the at least secondary scavenging and the at least secondary concentrating is 6-8 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910170405.2A CN109847924B (en) | 2019-03-07 | 2019-03-07 | Beneficiation method for coarse-grained cassiterite in tin-containing polymetallic sulfide ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910170405.2A CN109847924B (en) | 2019-03-07 | 2019-03-07 | Beneficiation method for coarse-grained cassiterite in tin-containing polymetallic sulfide ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109847924A CN109847924A (en) | 2019-06-07 |
| CN109847924B true CN109847924B (en) | 2020-07-28 |
Family
ID=66900091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910170405.2A Active CN109847924B (en) | 2019-03-07 | 2019-03-07 | Beneficiation method for coarse-grained cassiterite in tin-containing polymetallic sulfide ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109847924B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495574A (en) * | 2020-03-05 | 2020-08-07 | 云南锡业研究院有限公司 | Novel low-grade ore preselection process |
| CN111974539B (en) * | 2020-08-24 | 2021-10-29 | 昆明理工大学 | Method for improving quality and reducing impurities of tin concentrate |
| CN112237985B (en) * | 2020-10-09 | 2021-08-24 | 昆明理工大学 | Method for recovering cassiterite from tin-containing sulfide ore |
| CN114308368B (en) * | 2021-07-01 | 2023-02-03 | 中南大学 | Copper-tin ore separation process |
| CN114453126B (en) * | 2021-12-21 | 2023-09-29 | 云南锡业股份有限公司大屯锡矿 | Tin-containing oxidized vein ore preselection waste disposal method |
| CN115055277B (en) * | 2022-04-27 | 2023-10-13 | 四川化工职业技术学院 | Process for recovering kaolin, sulfur concentrate and titanium concentrate from pyrite tailings |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1174405A (en) * | 1966-10-26 | 1969-12-17 | Nat Res Dev | Improvements relating to the Treatment of Suspensions. |
| SU234967A1 (en) * | 1967-08-23 | 1973-01-26 | С. Н. Сутурин, Р. В. Кожнова, Л. Б. Дев това, Н. С. Клещенко, В. Е. ков, А. Е. Семенов , П. П. Пулькнн | METHOD OF PROCESSING TIN-CONTAINING PRODUCTS |
| CN100558468C (en) * | 2007-05-23 | 2009-11-11 | 华锡集团车河选矿厂 | Novel technics of cassiterite clay flotation |
| CN103433122B (en) * | 2013-09-12 | 2016-04-20 | 广西华锡集团股份有限公司车河选矿厂 | A kind of medium tin ore sub-prime classification and sorting technique |
| CN104941780B (en) * | 2015-07-02 | 2017-05-31 | 中国瑞林工程技术有限公司 | A kind of ore-dressing technique for efficiently separating tantalum, tin and zinnwaldite |
| CN108212507B (en) * | 2016-12-14 | 2020-02-18 | 有研工程技术研究院有限公司 | Mineral processing technology for recovering fine grains and micro-fine grains of cassiterite from tailings |
| CN106861927A (en) * | 2017-01-10 | 2017-06-20 | 广西高峰矿业有限责任公司 | A kind of beneficiation method of micro fine particle |
| CN107413515B (en) * | 2017-08-30 | 2019-06-11 | 昆明理工大学 | A kind of fine grain teeth cloth cassiterite beneficiation method |
-
2019
- 2019-03-07 CN CN201910170405.2A patent/CN109847924B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109847924A (en) | 2019-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109847924B (en) | Beneficiation method for coarse-grained cassiterite in tin-containing polymetallic sulfide ore | |
| CN101884951B (en) | Combined mineral dressing technology of fine grain and micro grain cassiterite | |
| CN101081378B (en) | Novel technics of rough-flotation high concentration high-efficient flotation | |
| CN103182344B (en) | Ore dressing combination process for processing high-slime lead-zinc oxide and sulfide mixed ore | |
| CN106984425B (en) | A kind of sub-prime classification diversion processing method of Lower Grade Micro-fine Grain tin ore | |
| CN102764690B (en) | Separation method for treating low-grade refractory zinc lead oxide ores | |
| CN109675712B (en) | Mineral processing technology for treating high-sulfur hematite-magnetic mixed iron ore | |
| CN111495788B (en) | Method for intelligently and preferentially selecting copper-blue-containing copper sulfide ore by X-ray | |
| CN105435957A (en) | Mineral separation technology for recovering low-grade marmatite and cassiterite minerals from copper separation tailings | |
| CN111495574A (en) | Novel low-grade ore preselection process | |
| CN112237985B (en) | Method for recovering cassiterite from tin-containing sulfide ore | |
| CN102151607A (en) | Joint magnetic flotation sorting method for complex magnetic pyrite copper-containing pyrite ore | |
| CN112221699B (en) | Clean and efficient beneficiation method for complex gold, silver, copper, lead and zinc-containing composite ore | |
| CN1943869A (en) | Step branched ore milling and milling and dressing circular new technology | |
| CN110586336A (en) | Low-alkali ore dressing method for pyrite containing magnetism and floating after magnetism | |
| CN105327771A (en) | Fine grinding and comprehensive recycling beneficiation process of copper-containing sulfur concentrate | |
| CN106583023A (en) | Beneficiation method for microgranular cassiterite | |
| CN111068897A (en) | Fine particle magnetite beneficiation process | |
| CN106861927A (en) | A kind of beneficiation method of micro fine particle | |
| CN114308368B (en) | Copper-tin ore separation process | |
| CN103433122A (en) | Quality-separating, grading and sorting process for tin middlings | |
| CN113304875B (en) | Dolomite-barite lead-zinc ore full-recycling method | |
| CN114453127B (en) | Copper-tin symbiotic sulfide ore preselection grading beneficiation method | |
| CN111940126B (en) | Heavy magnetic suspension combined recovery method for low-grade tin-containing tailings | |
| CN111282710B (en) | Asynchronous simultaneous separation process for poor and refractory nickel-copper ores |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |