CN216779070U - System for pulp bauxite concentrate - Google Patents
System for pulp bauxite concentrate Download PDFInfo
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- CN216779070U CN216779070U CN202122871828.2U CN202122871828U CN216779070U CN 216779070 U CN216779070 U CN 216779070U CN 202122871828 U CN202122871828 U CN 202122871828U CN 216779070 U CN216779070 U CN 216779070U
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Abstract
A system for slurrying bauxite concentrate comprises a feeding bin, a slurrying device, a slurrying gain tank and a rotary screen; the discharge hole of the feeding bin is opposite to the plate-type feeder, and the outlet of the plate-type feeder is opposite to the feeding hole of the slurrying device; the feeding port of the slurrying device is assembled at the top of the slurrying device, the discharging port of the slurrying device is fixedly arranged at the lower part of the slurrying device, the discharging port of the slurrying device is matched with the slurrying gain tank through a chute, a composite stirrer is arranged in the slurrying gain tank, the middle part of the slurrying gain tank is fixedly provided with a high-position discharging port, and the high-position discharging port is communicated with the inlet of the rotary screen through a pipeline provided with a slurry pump; the stirring paddle of the composite stirrer is positioned below the high-position discharge hole. The system ensures the slurrying time and effect of the filter cake; the discharging of the blending tank is high-level discharging, so that short-circuited small filter cakes are prevented from going out, and sundries are prevented from entering the main process.
Description
Technical Field
The utility model belongs to the technical field of bauxite beneficiation and alumina production, and particularly relates to a system for slurrying bauxite beneficiation concentrate.
Background
The bauxite concentrate is produced by grinding, floating and filter-pressing low-grade bauxite, has the characteristics of high alumina content, low silicon content, high aluminum-silicon ratio and the like, and is one of the better bauxite raw materials for producing alumina. At present, some enterprises adopt bauxite concentrate organization production, bauxite concentrate and raw ore are mixed all the time and then enter a production flow, and due to the fact that the water content of the concentrate is high and the viscosity of the concentrate is high, the phenomena that a grinding head ore bin feed opening and a belt feed opening are blocked and a mill lining plate bolt is broken loose and leaks are easily caused in the using process, excessive processing and the like exist, and the electricity consumption of a mill system and the waste of equipment productivity are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a system for pulping bauxite concentrate, which adopts the bauxite concentrate and circulating mother liquor to mix and pulp, and solves the problems of unsmooth blanking, fine fineness caused by excessive processing and the like in the process of preparing ore pulp slurry by using the bauxite concentrate by ore grinding equipment.
The system for slurrying the bauxite concentrate comprises a feeding bin 1, a slurry machine 4, a slurry gain tank 7 and a rotary screen 9; the discharge hole of the feeding bin 1 is opposite to the plate type feeder 2, and the outlet of the plate type feeder 2 is opposite to the feeding hole 3 of the slurrying device; the feeding port 3 of the slurrying device is assembled at the top of the slurrying device 4, the discharging port 5 of the slurrying device is fixedly arranged at the lower part of the slurrying device 4, the discharging port 5 of the slurrying device is matched with the slurrying gain tank 7 through a chute, the composite stirrer 6 is arranged in the slurrying gain tank 7, the middle part of the slurrying gain tank 7 is fixedly provided with a high-position discharging port 8, and the high-position discharging port 8 is communicated with the inlet of the rotary screen 9 through a pipeline provided with a slurry pump; the stirring paddle of the compound stirrer 6 is positioned below the high-level discharge hole 8.
The bottom of the stirring shaft of the composite stirrer 6 is provided with a stirring paddle, the bottom of the stirring shaft is also provided with a stirring rod, and the stirring rod is positioned between two adjacent paddles of the stirring paddle.
In the system, the feeding bin 1 is funnel-shaped, the top of the feeding bin is provided with a grating, and the grating is made of steel.
In the system, the inner wall of the feeding bin 1 is covered with the auxiliary sliding plate, and the auxiliary sliding plate is made of polytetrafluoroethylene.
In the system, the outer wall of the feeding bin 1 is provided with an electric rapping device.
In the system, a cutter is arranged in the feed inlet 3 of the slurry device, and the cutting edge of the cutter is upward and used for cutting the falling wet filter cake.
In the system, the outlet of the rotary screen 9 is matched with the inlet of the qualified slurry tank 10.
In the system, the included angle between the paddle and the stirring shaft is 5-25 degrees.
The method for slurrying the bauxite concentrate adopts the system and comprises the following steps:
1. grinding, floating and filter-pressing low-grade bauxite to generate a wet filter cake of bauxite concentrate, continuously loading the wet filter cake into a feeding bin 1 by using a forklift hopper, and feeding the wet filter cake into a feed inlet 3 of a pulpifying device by using a plate-type feeder 2 at the bottom of the feeding bin;
2. dividing the circulating mother liquor into a first part of mother liquor and a second part of mother liquor, wherein the first part of mother liquor accounts for 35-50% of the mass of the circulating mother liquor;
3. the wet filter cake enters the pulp maker 4 through the pulp maker feed inlet 3; continuously adding a first part of mother liquor into a slurrying device 4 through a slurrying device feeding hole 3; a first part of mother liquor and wet filter cakes form primary mixed slurry in a slurry machine 4; the solid content of the primary mixed material is 380-480 g/L; the primary mixed material enters a slurry gain tank 7 from a discharge hole 5 of the slurry machine through a chute, and at the moment, the second part of mother liquor also enters the slurry gain tank 7 from the chute at the same time and is mixed with the primary mixed slurry;
4. under the condition that the composite stirrer 6 is started, the primary mixed slurry and the second part of mother liquor continue to carry out slurrying reaction in the slurrying gain tank 7 to form secondary mixed slurry; with the increase of the secondary mixed slurry in the slurrying gain tank 7, the liquid level of the secondary mixed slurry reaches the high-level discharge port 8, and the secondary mixed slurry is conveyed to the rotary screen 9 from the high-level discharge port 8 through the slurry pump;
5. and separating impurities from the secondary mixed slurry entering the rotary screen 9 to obtain concentrate slurry.
In the step 1, the wet filter cake is cut by the grid at the top of the feeding bin 1, and the wet filter cake in the shape of a block enters the feeding bin 1.
In the step 1, when the bauxite concentrate falls on the inner wall of the feeding bin 1, the bauxite concentrate slides down from the sliding assisting plate on the inner wall.
In the step 1, an electric vibration beater outside the feeding bin 1 is started to accelerate the falling of the wet filter cake on the inside of the feeding bin 1.
In the step 3, when the bauxite concentrate enters the feed inlet 3 of the slurry device, the bauxite concentrate is cut by the cutting knife inside the feed inlet 3 of the slurry device and then enters the slurry device 4.
In the step 5, the obtained concentrate slurry is discharged from the outlet of the rotary screen 9 and enters the qualified slurry tank 10.
According to the system and the method, bauxite concentrate and circulating mother liquor are mixed and pulped, the problems that blanking is not smooth in the process of preparing ore pulp slurry by using the bauxite concentrate by ore grinding equipment, fineness is thin due to over processing and the like are solved, the bauxite concentrate is pulped to be used as a single flow, and the bauxite concentrate and the circulating mother liquor are fully stirred and blended in a pulper and then directly enter an alumina production system; the application of the system can save part of electric quantity of the concentrate matched with the mill for eating on one hand, can also reduce the pressure of insufficient ore milling yield of the raw material mill, improve the practical problems of belt sticking, feed opening blockage and the like in the ore feeding and raw material conveying processes, is beneficial to slurry production organization, improves the comprehensive aluminum-silicon ratio of ore for a production system, and fully exerts the advantages of high aluminum-silicon ratio of bauxite concentrate and fine granularity, thereby improving the yield, the cost and the efficiency.
Different from the traditional concentrate slurrying device for discharging, the slurrying discharging of the utility model is a bar screen controlled overflow discharging, thereby ensuring the high material level operation of a slurrying chamber and the difficult short circuit of a large filter cake, and ensuring the slurrying time and effect of the filter cake; the pulped concentrate pulp flows into a blending tank through a chute, and strong stirring pulp is configured in the blending tank for further pulping; the blending tank is further provided with a hanging chain on the powerful stirring paddle to form deep mixing slurrying of the hanging chain and the powerful stirring paddle; the discharging of the blending tank is high-level discharging, so that short-circuited small filter cakes are prevented from going out; discharging the material from the blending tank, feeding the material into a rotary screen at the top of the qualified raw ore pulp tank, and separating impurities by the rotary screen, wherein the qualified concentrate pulp enters a raw ore pulp storage tank of the production system; the prepared concentrate slurry enters the production flow through a rotary screen, and impurities in the process are prevented from entering the main flow.
Drawings
FIG. 1 is a schematic diagram of a system for slurrying bauxite concentrate in an embodiment of the present invention; in the figure, 1, a feeding bin, 2, a plate type feeder, 3, a slurry inlet, 4, a slurry, 5, a slurry outlet, 6, a composite stirrer and 7 are slurry gain tanks; 8. a high-level discharge hole; 9. rotating the screen; 10. and (5) qualified slurry tanks.
Detailed Description
In the embodiment of the utility model, the impurity content of the concentrate slurry is less than 1% by mass percent.
In the embodiment of the utility model, the aluminum-silicon mass ratio (A/S) of the wet filter cake of the bauxite concentrate is 4-6.
In the embodiment of the utility model, Na in the circulating mother liquor2OkThe concentration of (b) is 210-250 g/L.
The solid content of the concentrate slurry in the embodiment of the utility model is 300-400 g/L.
The treatment capacity of the slurrying system for the bauxite concentrate in the embodiment of the utility model is 50-100 t/h.
Example 1
The system structure of slurrying bauxite concentrate is shown in figure 1 and comprises a feeding bin 1, a slurrying device 4, a slurrying gain tank 7 and a rotary screen 9; the discharge hole of the bin 1 is opposite to the plate-type feeder 2, and the outlet of the plate-type feeder 2 is opposite to the feed inlet 3 of the pulpifying device;
the feed inlet 3 of the slurry machine is assembled at the top of the slurry machine 4, the discharge outlet 5 of the slurry machine is fixedly arranged at the lower part of the slurry machine 4, the discharge outlet 5 of the slurry machine is matched with the slurry gain tank 7 through a chute, a composite stirrer 6 is arranged in the slurry gain tank 7, a high-position discharge outlet 8 is fixedly arranged at the middle part of the slurry gain tank 7,
the high-level discharge port 8 is communicated with an inlet of a rotary screen 9 through a pipeline provided with a slurry pump; the stirring paddle of the composite stirrer 6 is positioned below the high-position discharge hole 8;
the bottom of a stirring shaft of the composite stirrer 6 is provided with a stirring paddle, the bottom of the stirring shaft is also provided with a stirring rod, and the stirring rod is positioned between two adjacent blades of the stirring paddle;
the feeding bin 1 is funnel-shaped, the top of the feeding bin is provided with a grid, and the grid is made of steel;
the inner wall of the feeding bin 1 is covered with an auxiliary sliding plate which is made of polytetrafluoroethylene;
an electric vibrator is arranged on the outer wall of the feeding bin 1
A cutting knife is arranged in the feed inlet 3 of the slurry device, and the cutting edge of the cutting knife is upward and is used for cutting a falling wet filter cake;
the outlet of the rotary screen 9 is matched with the inlet of the qualified slurry tank 10;
the included angle between the paddle and the stirring shaft is 5 degrees;
the method comprises the following steps:
the treatment capacity of the system is 50t/h, and the target solid content of the concentrate slurry is 320 g/L;
grinding, floating and filter-pressing low-grade bauxite to generate a wet filter cake of bauxite concentrate, continuously loading the wet filter cake into a feeding bin 1 by using a forklift hopper, feeding the wet filter cake into a feeding hole 3 of a pulpifying device by using a plate feeder 2 at the bottom of the feeding bin, and sliding down from a sliding assistant plate on the inner wall when the bauxite concentrate falls on the inner wall of the feeding bin 1; starting an electric vibration beater outside the feeding bin 1 to accelerate the falling of the wet filter cake on the inside of the feeding bin 1; after the wet filter cake is cut by a grid at the top of the feeding bin 1, the wet filter cake in a lump shape enters the feeding bin 1;
the quantity is quantified according to 50t/h by the running speed of the adjusting plate type feeder 2;
dividing the circulating mother liquor into a first part of mother liquor and a second part of mother liquor, wherein the first part of mother liquor accounts for 35% of the mass of the circulating mother liquor;
the wet filter cake enters the pulp maker 4 through the pulp maker feed inlet 3; continuously adding a first part of mother liquor into a slurrying device 4 through a slurrying device feeding hole 3; a first part of mother liquor and wet filter cakes form primary mixed slurry in a slurry machine 4; the solid content of the primary mixed material is 380 g/L; the primary mixed material enters a slurry gain tank 7 from a discharge hole 5 of the slurry machine through a chute, and at the moment, the second part of mother liquor also enters the slurry gain tank 7 from the chute at the same time and is mixed with the primary mixed slurry;
when the bauxite concentrate enters the feed inlet 3 of the slurry device, the bauxite concentrate is cut by a cutting knife inside the feed inlet 3 of the slurry device and then enters the slurry device 4, so that the impact of a large wet filter cake on the blades is relieved;
under the condition that the composite stirrer 6 is started, the primary mixed slurry and the second part of mother liquor continue to carry out slurrying reaction in the slurrying gain tank 7 to form secondary mixed slurry; along with the increase of the secondary mixed slurry in the slurrying gain tank 7, the liquid level of the secondary mixed slurry reaches a high-level discharge port 8, and the secondary mixed slurry is conveyed to a rotary screen 9 from the high-level discharge port 8 through a slurry pump;
separating impurities from the secondary mixed slurry entering the rotary screen 9 to obtain concentrate slurry;
the obtained concentrate slurry is discharged from an outlet of the rotary screen 9 and enters a qualified slurry tank 10;
the liquid-solid content of the pulped concentrate pulp is actually measured from the outlet of the rotary screen, the control plan target is met, the conversion number of the solid content of the selected concentrate which is measured from the slag discharged by the rotary screen at regular time and is not pulped is 0.05t/h, the effective pulping rate is 99.9%, and the pulping effect is good.
Example 2
The system structure of the slurried bauxite concentrate flotation is the same as that in the embodiment 1, and the difference is that:
the included angle between the paddle and the stirring shaft is 25 degrees;
the method comprises the following steps:
the treatment capacity of the system is 100t/h, and the target solid content of the concentrate slurry is 400 g/L;
grinding, floating and filter-pressing low-grade bauxite to generate a wet filter cake of bauxite concentrate, continuously loading the wet filter cake into a feeding bin 1 by using a forklift hopper, feeding the wet filter cake into a feeding hole 3 of a pulpifying device by using a plate feeder 2 at the bottom of the feeding bin, and sliding down from a sliding assistant plate on the inner wall when the bauxite concentrate falls on the inner wall of the feeding bin 1; starting an electric vibration beater outside the feeding bin 1 to accelerate the falling of the wet filter cake on the inside of the feeding bin 1; after the wet filter cake is cut by a grid at the top of the feeding bin 1, the wet filter cake which forms a lump shape enters the feeding bin 1;
the quantity is quantified according to 100t/h by the running speed of the adjusting plate type feeder 2;
dividing the circulating mother liquor into a first part of mother liquor and a second part of mother liquor, wherein the first part of mother liquor accounts for 50% of the mass of the circulating mother liquor;
the wet filter cake enters the pulp machine 4 through the feed inlet 3 of the pulp machine; continuously adding a first part of mother liquor into a slurrying device 4 through a slurrying device feeding hole 3; a first part of mother liquor and wet filter cakes form primary mixed slurry in a slurry machine 4; the solid content of the primary mixed material is 480 g/L; the primary mixed material enters a slurry gain tank 7 from a discharge hole 5 of the slurry machine through a chute, and at the moment, the second part of mother liquor also enters the slurry gain tank 7 from the chute at the same time and is mixed with the primary mixed slurry;
when the bauxite concentrate enters the feeding hole 3 of the slurrying device, the bauxite concentrate is cut by a cutting knife inside the feeding hole 3 of the slurrying device and then enters the slurrying device 4, and the bauxite concentrate is cut into small particles, so that the slurrying speed is accelerated, and the phenomenon that the slurrying device is stirred and stops due to the fact that a large wet filter cake is blocked by the slurrying device is avoided;
under the condition that the composite stirrer 6 is started, the primary mixed slurry and the second part of mother liquor continue to carry out slurrying reaction in the slurrying gain tank 7 to form secondary mixed slurry; along with the increase of the secondary mixed slurry in the slurrying gain tank 7, the liquid level of the secondary mixed slurry reaches a high-level discharge port 8, and the secondary mixed slurry is conveyed to a rotary screen 9 from the high-level discharge port 8 through a slurry pump;
separating impurities from the secondary mixed slurry entering the rotary screen 9 to obtain concentrate slurry;
the obtained concentrate slurry is discharged from an outlet of the rotary screen 9 and enters a qualified slurry tank 10;
the solid content of the slurried concentrate slurry is actually measured from the outlet of the rotary screen to be 395g/l, the control plan target is met, the conversion number of the solid content of the un-slurried concentrate from the slag discharged by the rotary screen is measured at regular time to be 0.85t/h, the effective slurrying rate is 99.2%, and the slurrying effect is good.
Claims (7)
1. A system for slurrying bauxite concentrate is characterized by comprising a feeding bin, a slurrying device, a slurrying gain tank and a rotary screen; the discharge hole of the feeding bin is opposite to the plate-type feeder, and the outlet of the plate-type feeder is opposite to the feeding hole of the slurrying device; the feeding port of the slurrying device is assembled at the top of the slurrying device, the discharging port of the slurrying device is fixedly arranged at the lower part of the slurrying device, the discharging port of the slurrying device is matched with the slurrying gain tank through a chute, a composite stirrer is arranged in the slurrying gain tank, the middle part of the slurrying gain tank is fixedly provided with a high-position discharging port, and the high-position discharging port is communicated with the inlet of the rotary screen through a pipeline provided with a slurry pump; the stirring paddle of the composite stirrer is positioned below the high-position discharge hole.
2. The system for slurrying bauxite concentrate of claim 1, wherein the feed bin is funnel shaped with a grate on top, the grate being made of steel.
3. The system for slurrying bauxite concentrate of claim 1, wherein the feed bin is covered on an inner wall with a sliding aid plate made of polytetrafluoroethylene.
4. The system for slurrying bauxite concentrate of claim 1, wherein the feed bin is provided with an electrical rapper on an outer wall thereof.
5. The system for slurrying bauxite concentrate of claim 1, wherein the slurry inlet is internally provided with a cutter, the cutter having an upward edge for cutting a falling wet cake.
6. The system for slurrying bauxite concentrate of claim 1, wherein the outlet of the rotary screen is coupled to the inlet of the accept chest.
7. The system for slurrying bauxite concentrate as claimed in claim 1, wherein a stirring paddle is mounted at the bottom of the stirring shaft of the composite stirrer, and a stirring rod is further mounted at the bottom of the stirring shaft and located between two adjacent paddles of the stirring paddle; the included angle between the paddle and the stirring shaft is 5-25 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122871828.2U CN216779070U (en) | 2021-11-22 | 2021-11-22 | System for pulp bauxite concentrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122871828.2U CN216779070U (en) | 2021-11-22 | 2021-11-22 | System for pulp bauxite concentrate |
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| Publication Number | Publication Date |
|---|---|
| CN216779070U true CN216779070U (en) | 2022-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122871828.2U Active CN216779070U (en) | 2021-11-22 | 2021-11-22 | System for pulp bauxite concentrate |
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| CN (1) | CN216779070U (en) |
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- 2021-11-22 CN CN202122871828.2U patent/CN216779070U/en active Active
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