Sorting system for petalite-containing pegmatite spodumene ore
By using a heavy medium pressure three-product sorting system and a flotation joint sorting system in the spodumene ore process during the spodumene ore dressing process, the problems of high cost and poor efficiency of spodumene flotation process in the existing technology are solved, and efficient recovery of lithium resources and the improvement of ore comprehensive utilization rate is achieved.
Patent Information
- Application Number
- CN202420373335.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The existing spodumene flotation process has problems such as high production costs, poor economic benefits and low resource recovery. In particular, the poor floating ability of lithium feldspar, resulting in waste of lithium resources.
The heavy medium pressure three-product sorting system and the flotation joint sorting system are adopted. Through the combination of the grading screen, the heavy medium pressure three-product sorting system and the flotation system, the efficient sorting of lithosparia and spodumene is achieved.
It improves the comprehensive utilization rate of ore, reduces production costs, increases economic benefits, realizes efficient recycling of lithium resources, and reduces the amount of incoming grinding, which is energy-saving and environmentally friendly.
Smart Images
Figure CN222817009U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ore dressing of petalite-containing pegmatite spodumene ore, in particular to a petalite-containing pegmatite spodumene ore sorting system which adopts a heavy medium pressurized three-product sorting system and flotation combined sorting. Background Art
[0002] As we all know, the lithium resources currently mined and utilized in the world are mainly pegmatite deposits and brine deposits. About 20 types of lithium minerals have been discovered in the world. Typical lithium minerals include spodumene, petalite, lepidolite, lithium aluminum phosphate, and eucryptite.
[0003] With the rapid development of emerging industries such as new energy and new materials, the demand for lithium resources has also increased dramatically. Pegmatite lithium mines with symbiotic petalite and spodumene have also begun to be developed and utilized. At present, the most common beneficiation process for spodumene mines is flotation process. However, there are many problems in the recovery of spodumene minerals from pegmatite containing petalite using the original traditional single flotation process:
[0004] 1. The floatability of petalite is poor and the flotation is difficult. The flotation effect of petalite is not ideal, resulting in a waste of lithium resources;
[0005] 2. The "inevitable ions" such as Ca2+ and Mg2+ produced by gangue minerals during grinding and flotation will contaminate the mineral surface, making the difference in floatability between useful minerals and gangue minerals smaller, resulting in poor flotation effect;
[0006] 3. The flotation spodumene process uses a large amount of flotation reagents throughout the entire process, has high production costs and is difficult to manage.
[0007] In summary, the spodumene flotation process has problems such as high production cost, poor economic benefits, and low resource recovery rate. Summary of the invention
[0008] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and to provide a spodumene ore sorting system containing petalite feldspar pegmatite, which has high comprehensive utilization rate of ore, high economic benefit, fast capital return, small amount of spodumene ore entering the mill, energy saving and environmental protection.
[0009] The technical solution adopted by the utility model to solve its technical problems is:
[0010] A petalite-containing pegmatite spodumene ore sorting system is characterized in that the sorting system comprises a grading screen, a heavy medium pressurized three-product sorting system and a flotation system, the screen outlet of the grading screen is a qualified particle size outlet, the screen outlet of the grading screen is a fine particle size outlet, the qualified particle size outlet is connected to the inlet of the heavy medium pressurized three-product sorting system, the outlet of the heavy medium pressurized three-product sorting system is divided into a petalite concentrate outlet, a petalite tailings outlet and a re-selected spodumene outlet, the petalite concentrate outlet and the tailings outlet respectively obtain petalite concentrate and petalite tailings, the re-selected spodumene outlet and the fine particle size outlet are respectively connected to the inlet of the flotation system, the outlet of the flotation system is a flotation concentrate outlet and a flotation tailings outlet, the flotation concentrate outlet obtains a flotation concentrate, and the flotation tailings outlet obtains a flotation tailings.
[0011] The heavy medium pressurized three-product separation system described in the utility model comprises a heavy medium combined medium barrel, a pressurized three-product heavy medium cyclone, a light product fixed screen, a light product de-mediation screen, a medium ore fixed screen, a medium ore de-mediation screen, a heavy product fixed screen, a heavy product de-mediation screen and a magnetic separator, wherein the qualified particle size outlet of the grading screen is connected to the feed port of the heavy medium combined medium barrel via a chute, the discharge port of the heavy medium combined medium barrel is connected to the feed port of the pressurized three-product heavy medium cyclone via a slurry pump, the light product outlet, the medium ore product outlet and the heavy product outlet of the pressurized three-product heavy medium cyclone are respectively connected to the inlets of the light product fixed screen, the medium ore fixed screen and the heavy product fixed screen, and the screen outlets of the light product fixed screen, the medium ore fixed screen and the heavy product fixed screen are respectively connected to the feed port of the pressurized three-product heavy medium cyclone. The inlets of the light product de-media screen, the medium ore de-media screen and the heavy product de-media screen are connected, the under-screen outlets of the light product fixed screen, the medium ore fixed screen and the heavy product fixed screen are respectively connected to the heavy medium combination barrel via pipelines, the under-screen product outlets of the light product de-media screen, the medium ore de-media screen and the heavy product de-media screen are connected to the magnetic separator, the magnetic product outlet of the magnetic separator is connected to the heavy medium combination barrel via pipelines, and the non-magnetic product outlet of the magnetic separator is transported to the return water pool via pipelines; the over-screen product of the light product de-media screen is petalite concentrate, the over-screen product of the medium ore de-media screen is petalite tailings, the over-screen product of the heavy product de-media screen is spodumene after gravity selection, and the over-screen spodumene outlet of the heavy product de-media screen is connected to the flotation system via a belt.
[0012] The pressurized three-product heavy medium cyclone described in the utility model comprises a first cyclone and a second cyclone, the feed port of the first cyclone is connected with the discharge port of the heavy medium combination barrel, the overflow outlet of the first cyclone is connected with the light product fixed screen through a pipeline, the underflow outlet of the first cyclone is connected with the feed port of the second cyclone, the overflow outlet of the second cyclone is connected with the medium ore fixed screen, and the underflow outlet of the second cyclone is connected with the heavy product fixed screen.
[0013] The flotation system of the utility model comprises a ball mill, a flotation stirring barrel and a flotation unit, wherein the inlet of the ball mill is connected to the outlet of the reselected spodumene via a belt, the discharge port of the ball mill is connected to the feed port of the flotation stirring barrel via a pipeline, and the discharge port of the flotation stirring barrel is connected to the feed port of the flotation unit via a pipeline.
[0014] The flotation unit described in the utility model comprises a first flotation unit, a second flotation unit, a third flotation unit, a fourth flotation unit, a fifth flotation unit and a sixth flotation unit. The discharge port of the flotation stirring barrel is connected to the feed port of the first flotation unit through a pipeline, the in-tank product outlet of the first flotation unit is connected to the feed port of the second flotation unit through a pipeline, the in-tank product of the second flotation unit is connected to the feed port of the third flotation unit, and the in-tank product of the third flotation unit is a flotation tailing; the foam product outlet of the first flotation unit is connected to the feed port of the fourth flotation unit through a pipeline, the foam product outlet of the fourth flotation unit is connected to the feed port of the fifth flotation unit through a pipeline, the foam product outlet of the fifth flotation unit is connected to the feed port of the sixth flotation unit through a pipeline, and the foam product of the sixth flotation unit is a flotation concentrate.
[0015] The utility model adopts the system, and has the advantages of high comprehensive utilization rate of ore, high economic benefit, fast capital return, less spodumene ore flotation amount entering the mill, energy saving and environmental protection, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0017] The utility model is further described below in conjunction with the accompanying drawings:
[0018] As shown in the accompanying drawings, a petalite-containing pegmatite spodumene ore sorting system is characterized in that the sorting system comprises a grading screen 1, a heavy medium pressurized three-product sorting system and a flotation system, the upper screen outlet of the grading screen 1 is a qualified particle size outlet, the lower screen outlet of the grading screen 1 is a fine particle size outlet, the qualified particle size outlet is connected to the inlet of the heavy medium pressurized three-product sorting system, the outlet of the heavy medium pressurized three-product sorting system is divided into a petalite concentrate outlet, a petalite tailings outlet and a re-selected spodumene outlet, the petalite concentrate outlet and the tailings outlet respectively obtain petalite concentrate and petalite tailings, the re-selected spodumene outlet and the fine particle size outlet are respectively connected to the inlet of the flotation system, the outlet of the flotation system is a flotation concentrate outlet and a flotation tailings outlet, the flotation concentrate outlet obtains a flotation concentrate, and the flotation tailings outlet obtains a flotation tailings.
[0019] Furthermore, the heavy medium pressurized three-product separation system comprises a heavy medium combined medium barrel 2, a pressurized three-product heavy medium cyclone 3, a light product fixed screen 4, a light product de-mediation screen 5, a medium ore fixed screen 6, a medium ore de-mediation screen 7, a heavy product fixed screen 8, a heavy product de-mediation screen 9 and a magnetic separator 10, the qualified particle size outlet of the grading screen 1 is connected to the feed port of the heavy medium combined medium barrel 2 via a chute, the discharge port of the heavy medium combined medium barrel 2 is connected to the feed port of the pressurized three-product heavy medium cyclone 3 via a slurry pump, the light product outlet, the medium ore product outlet and the heavy product outlet of the pressurized three-product heavy medium cyclone 3 are respectively connected to the inlets of the light product fixed screen 4, the medium ore fixed screen 6 and the heavy product fixed screen 8, and the upper screen outlets of the light product fixed screen 4, the medium ore fixed screen 6 and the heavy product fixed screen 8 are respectively connected to the light product fixed screen 4, the medium ore fixed screen 6 and the heavy product fixed screen 8. The inlets of the product de-media screen 5, the medium ore de-media screen 7 and the heavy product de-media screen 9 are connected, and the under-screen outlets of the light product fixed screen 4, the medium ore fixed screen 6 and the heavy product fixed screen 8 are respectively connected to the heavy medium combination barrel 2 through pipelines, the under-screen product outlets of the light product de-media screen 5, the medium ore de-media screen 7 and the heavy product de-media screen 9 are connected to the magnetic separator 10, the magnetic product outlet of the magnetic separator 10 is connected to the heavy medium combination barrel 2 through a pipeline, and the non-magnetic product outlet of the magnetic separator 10 is transported to the return water pool through a pipeline; the over-screen product of the light product de-media screen 5 is petalite concentrate, the over-screen product of the medium ore de-media screen 7 is petalite tailings, and the over-screen product of the heavy product de-media screen 9 is spodumene after gravity selection, and the over-screen spodumene outlet of the heavy product de-media screen 9 is connected to the flotation system through a belt.
[0020] Furthermore, the pressurized three-product heavy medium cyclone 3 includes a first cyclone and a second cyclone, the feed port of the first cyclone is connected to the discharge port of the heavy medium combination barrel 2, the overflow outlet of the first cyclone is connected to the light product fixed screen 4 through a pipeline, the underflow outlet of the first cyclone is connected to the feed port of the second cyclone, the overflow outlet of the second cyclone is connected to the medium ore fixed screen 6, and the underflow outlet of the second cyclone is connected to the heavy product fixed screen 8.
[0021] Furthermore, the flotation system includes a ball mill 11, a flotation stirring barrel 12 and a flotation unit, the inlet of the ball mill 11 is connected to the outlet of the re-selected spodumene via a belt, the discharge port of the ball mill 11 is connected to the feed port of the flotation stirring barrel 12 via a pipeline, and the discharge port of the flotation stirring barrel 12 is connected to the feed port of the flotation unit via a pipeline.
[0022] Furthermore, the flotation unit comprises a first flotation unit 13, a second flotation unit 14, a third flotation unit 15, a fourth flotation unit 16, a fifth flotation unit 17 and a sixth flotation unit 18, the discharge port of the flotation mixing barrel 12 is connected to the feed port of the first flotation unit 13 via a pipeline, the product outlet of the tank of the first flotation unit 13 is connected to the feed port of the second flotation unit 14 via a pipeline, the product outlet of the tank of the second flotation unit 14 is connected to the feed port of the third flotation unit 1 5 feed port, the product in the tank of the third flotation unit 15 is flotation tailings; the foam product outlet of the first flotation unit 13 is connected to the feed port of the fourth flotation unit 16 through a pipeline, the foam product outlet of the fourth flotation unit 16 is connected to the feed port of the fifth flotation unit 17 through a pipeline, the foam product outlet of the fifth flotation unit 17 is connected to the feed port of the sixth flotation unit 18 through a pipeline, and the foam product of the sixth flotation unit 18 is flotation concentrate.
[0023] The heavy medium in the heavy medium barrel 2 is ferrosilicon powder, the magnetic content of the ferrosilicon powder is ≥99%, the fineness is 90%≥-325≥85%, the density of the heavy medium suspension in the heavy medium barrel 2 is 1.7-3.2g / m³, and the pressure of the slurry pump is 0.15Mpa-0.25Mpa.
[0024] The utility model has the following beneficial effects:
[0025] (1) The heavy medium pressurized three-product heavy medium cyclone can select three products, namely, petalite concentrate, tailings and spodumene, at one time, which greatly reduces the investment cost and operation cost of the plant;
[0026] (2) Heavy medium pressurized three-product heavy medium cyclone The first stage cyclone can complete the separation of petalite concentrate and make the product meet the sales grade requirements, which can quickly complete the capital return and increase the comprehensive utilization rate of the ore;
[0027] (2) Heavy medium pressurized three-product heavy medium cyclone 3 The two-stage cyclone can complete the separation of spodumene associated minerals and can directly throw out tailings that are lower than the spodumene industry standard. First, it reduces the amount of ore entering the mill flotation process and reduces production costs; second, it reduces the generation of secondary ore mud and reduces the "unavoidable ions" (Ca 2+ , Fe 3+ Mg 2+ The interference of flotation operation by the flotation system can be reduced, and the flotation concentrate grade can be improved. The produced gravity separation tailings can be stored or sold directly, so as to quickly complete the capital return.
[0028] (3) The combined heavy medium separation and flotation separation system can increase the flotation concentrate grade by 15% to 20%, reduce the tailings grade by 15% to 25%, and increase the concentrate recovery rate by more than 15%.
[0029] In some embodiments of the present application, the heavy medium suspension and the ore on the screen of the grading screen 1 are fed into the pressurized three-product heavy medium cyclone 3 at a pressure of 0.15MPa~0.25MPa through a slurry pump, and are sorted under the action of centrifugal force and gravity. The overflow of the first stage of the pressurized three-product heavy medium cyclone 3 is stored or sold as petalite, and the overflow of the second stage cyclone is sold as tailings. The bottom flow product of the second stage cyclone enters the subsequent flotation process, and is finally floated as spodumene concentrate and tailings. The slurry pump is connected to the frequency conversion motor, and its feed pressure is achieved by adjusting the frequency of the slurry pump by the frequency conversion motor. The tailings after fine-grained heavy medium sorting are fed into the ball mill 11, and the tailings are ground to -200 mesh, accounting for 60%~90%. The adjusting agent, collecting agent and frother are added to the flotation stirring barrel 1212 in sequence, and after stirring for a certain period of time, they are fed into the flotation machine for recovery. Example
[0030] A spodumene mine containing petalite feldspar in Africa has an original ore with a Li2O grade of 1.50%. The pegmatite is sorted using a heavy medium pressure three-product sorting system and a flotation combined sorting system. The specific steps are as follows: First, the original ore -6mm is fed from the silo to the grading screen 1 through a feeder for screening. After screening by the grading screen 1, 0.5-6mm particle size and -0.5mm or less particle size are obtained. The 0.5-6mm particle size product is used as the feed for the heavy medium sorting system, and the -0.5mm particle size product is fed to the subsequent grinding and flotation operation.
[0031] In the heavy medium mixing barrel 2, ferrosilicon powder (magnetic content ≥ 95%, fineness 90% ≥ -325 ≥ 85%) is mixed with water to form a heavy medium suspension with a density of 1.85 g / m3, and after being evenly mixed with the 0.5-6 mm particle size ore on the grading screen 1, it is sent to the pressurized three-product heavy medium cyclone 3 for sorting by a slurry pump to obtain light product, medium ore and heavy product. The light products after sorting are passed through the light product fixed screen 4 and the light product de-mediating screen 5 in turn, and after being rinsed with water, the heavy medium is removed, and the screen product of the light product de-mediating screen 5 is obtained as petalite concentrate, with a Li2O grade of 3.20% and an operating yield of 12%; the medium ore products after sorting are passed through the medium ore fixed screen 6 and the medium ore de-mediating screen 7 in turn, and after being rinsed with water, the heavy medium is removed, and the screen product of the medium ore de-mediating screen 7 is obtained as tailings, with an operating yield of 25% and a tailings grade of 0.3%; the heavy products after sorting are passed through the heavy product fixed screen 8 and the heavy product de-mediating screen 9 in turn, and after being rinsed with water, the heavy medium is removed, and the screen product of the heavy product de-mediating screen 9 is obtained as spodumene concentrate, with a Li2O grade of 2.90% and an operating yield of 63%;
[0032] The fine-grained tailings after the fine-grained heavy medium separation are fed into the ball mill 11 for grinding, and the tailings are ground to -200 mesh, accounting for 75%;
[0033] The fine-grained material after grinding is adjusted to a pulp concentration of about 32%, and is fed into the flotation mixing barrel 12. The adjusting agent, the collecting agent, and the frother are added in sequence. After being fully stirred, the material is fed into the flotation operation. After the flotation process of six groups of flotation units, the final spodumene concentrate is obtained. Its indicators are shown in the table below.
[0034] Technology Li2O grade of concentrate Concentrate recovery rate / % Flotation 4.65 75.30 Heavy media separation-flotation 5.57 85.42
[0035] From the above comparison, it can be seen that compared with the simple flotation process and the heavy medium pressurized three-product sorting-flotation combined sorting system of the present application, the present application can directly sort out qualified petalite concentrate for sale before entering the flotation system, and throw out a large amount of tailings, reduce the amount of dry ore entering flotation, thereby reducing the flotation cost and tailings treatment cost. At the same time, the grade and total recovery rate of the spodumene concentrate after heavy medium sorting-flotation are significantly higher than the product grade and total recovery rate obtained by the simple flotation process. Therefore, the utility model has the advantages of high comprehensive utilization rate of ore, high economic benefit, fast capital return, small amount of spodumene ore entering the mill for flotation, energy saving and environmental protection, etc. due to the adoption of the above system.
Claims
1. A petalite-containing pegmatite spodumene ore sorting system, characterized in that The sorting system comprises a grading screen, a heavy medium pressurized three-product sorting system and a flotation system. The upper outlet of the grading screen is a qualified particle size outlet, the lower outlet of the grading screen is a fine particle size outlet, the qualified particle size outlet is connected to the inlet of the heavy medium pressurized three-product sorting system, the outlet of the heavy medium pressurized three-product sorting system is divided into a petalite concentrate outlet, a petalite tailings outlet and a re-selected spodumene outlet, the petalite concentrate outlet and the tailings outlet respectively obtain petalite concentrate and petalite tailings, the re-selected spodumene outlet and the fine particle size outlet are connected to the inlet of the heavy medium pressurized three-product sorting system, the outlet of ... The particle size outlets are respectively connected to the inlet of the flotation system. The outlets of the flotation system are the flotation concentrate outlet and the flotation tailings outlet. The flotation concentrate outlet obtains the flotation concentrate, and the flotation tailings outlet obtains the flotation tailings. The heavy medium pressurized three-product sorting system comprises a heavy medium combined barrel, a pressurized three-product heavy medium cyclone, a light product fixed screen, a light product de-mediation screen, a medium ore fixed screen, a medium ore de-mediation screen, a heavy product fixed screen, a heavy product de-mediation screen and a magnetic separator. The qualified particle size outlet of the grading screen is connected to the feed port of the heavy medium combined barrel via a chute. The discharge port of the medium combination barrel is connected to the feed port of the pressurized three-product heavy medium cyclone through a slurry pump, and the light product outlet, medium ore product outlet and heavy product outlet of the pressurized three-product heavy medium cyclone are connected to the inlet of the light product fixed screen, medium ore fixed screen and heavy product fixed screen respectively. The upper screen outlets of the light product fixed screen, medium ore fixed screen and heavy product fixed screen are connected to the inlet of the light product de-mediation screen, medium ore de-mediation screen and heavy product de-mediation screen respectively, and the lower screen outlets of the light product fixed screen, medium ore fixed screen and heavy product fixed screen are connected to the heavy medium cyclone through pipelines respectively. The light product de-media screen, the medium ore de-media screen and the heavy product de-media screen are connected to the combined medium barrel, the under-screen product outlets of the light product de-media screen, the medium ore de-media screen and the heavy product de-media screen are connected to the magnetic separator, the magnetic product outlet of the magnetic separator is connected to the heavy medium combined medium barrel through a pipeline, and the non-magnetic product outlet of the magnetic separator is transported to the return water pool through a pipeline; the over-screen product of the light product de-media screen is petalite concentrate, the over-screen product of the medium ore de-media screen is petalite tailings, and the over-screen product of the heavy product de-media screen is spodumene after gravity separation, and the over-screen spodumene outlet of the heavy product de-media screen is connected to the flotation system through a belt.
2. A petalite-containing pegmatite spodumene ore sorting system according to claim 1, characterized in that The pressurized three-product heavy medium cyclone comprises a first cyclone and a second cyclone, the feed port of the first cyclone is connected to the discharge port of the heavy medium combination barrel, the overflow outlet of the first cyclone is connected to the light product fixed screen via a pipeline, the underflow outlet of the first cyclone is connected to the feed port of the second cyclone, the overflow outlet of the second cyclone is connected to the medium ore fixed screen, and the underflow outlet of the second cyclone is connected to the heavy product fixed screen.
3. A petalite-containing pegmatite spodumene ore sorting system according to claim 1, characterized in that The flotation system comprises a ball mill, a flotation stirring barrel and a flotation unit. The inlet of the ball mill is connected to the outlet of the reselected spodumene via a belt, the discharge port of the ball mill is connected to the feed port of the flotation stirring barrel via a pipeline, and the discharge port of the flotation stirring barrel is connected to the feed port of the flotation unit via a pipeline.
4. A petalite-containing pegmatite spodumene ore sorting system according to claim 3, characterized in that The flotation unit comprises a first flotation unit, a second flotation unit, a third flotation unit, a fourth flotation unit, a fifth flotation unit and a sixth flotation unit. The discharge port of the flotation stirring barrel is connected to the feed port of the first flotation unit via a pipeline, the in-tank product outlet of the first flotation unit is connected to the feed port of the second flotation unit via a pipeline, the in-tank product of the second flotation unit is connected to the feed port of the third flotation unit, and the in-tank product of the third flotation unit is flotation tailings; the foam product outlet of the first flotation unit is connected to the feed port of the fourth flotation unit via a pipeline, the foam product outlet of the fourth flotation unit is connected to the feed port of the fifth flotation unit via a pipeline, the foam product outlet of the fifth flotation unit is connected to the feed port of the sixth flotation unit via a pipeline, and the foam product of the sixth flotation unit is flotation concentrate.