CN112760478A - High-clay polymetallic ore pulp thickening method - Google Patents

High-clay polymetallic ore pulp thickening method Download PDF

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Publication number
CN112760478A
CN112760478A CN202011451725.4A CN202011451725A CN112760478A CN 112760478 A CN112760478 A CN 112760478A CN 202011451725 A CN202011451725 A CN 202011451725A CN 112760478 A CN112760478 A CN 112760478A
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ore pulp
flocculating agent
product
clay
phi
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CN112760478B (en
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刘会武
苏学斌
向秋林
师留印
刘康
刘忠臣
程浩
王桂硕
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Beijing Research Institute of Chemical Engineering and Metallurgy of CNNC
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Beijing Research Institute of Chemical Engineering and Metallurgy of CNNC
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D3/00—Differential sedimentation
    • B03D3/06—Flocculation
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The invention relates to the field of wet metallurgy, in particular to a high-clay polymetallic ore pulp thickening method. The method comprises the following steps: performing ball milling treatment on the ore, and then grading to obtain product ore pulp; mixing the product ore pulp with a flocculating agent, and settling the fully flocculated ore pulp to obtain a flocculating body and supernatant; the supernatant liquid flows back to be mixed with the product pulp and a flocculating agent; squeezing and dehydrating the flocculating body to obtain underflow and water with the solid mass fraction of 55-60%; and the water overflows from the flocculation layer, enters supernatant liquor under the filtering action of the flocculation layer, returns to be used for ball milling and grading, and partially returns to be used for being mixed with the product ore pulp and the flocculating agent. The invention improves the flocculation sedimentation speed of ore pulp, reduces the consumption of flocculating agent, obviously improves the production capacity of the thickener, solves the bottleneck technical problem restricting the production of high clay content polymetallic ore and achieves the purpose of quality and efficiency improvement.

Description

High-clay polymetallic ore pulp thickening method
Technical Field
The invention relates to the field of wet metallurgy, in particular to a high-clay polymetallic ore pulp thickening method.
Background
Along with the continuous development of mineral resources, the refractory mineral resources are more and more applied to production. The refractory ore includes ore coated with certain target minerals or ore with fine particle size and high clay content. For the effective decomposition of this kind of ore, the degree of dissociation of the ore must be increased by grinding the ore. After the raw ore is ground, the ore pulp is usually subjected to solid-liquid separation by using filter equipment such as a filter press, a belt filter and the like so as to meet the ore pulp concentration requirement of a subsequent leaching process and reduce the subsequent feed liquid treatment capacity. Because the ground slurry is fine and the clay content is high, the phenomena of long filtering time and filter cloth adhesion exist in the production process of the filter, and meanwhile, the filtered filter cake needs to be further subjected to size mixing, and the problems of high energy consumption, complex process and the like exist. And the separation of the subsidiary industry can also be carried out by adopting a dense method. The thickening method is generally applied to the fields of mineral dressing concentrate, tailings, leached ore pulp countercurrent washing, wastewater treatment and the like, and can generally carry out thickening or countercurrent washing on the pulp with the mass concentration of less than 20%.
In the prior art, the 'model selection test research on neutral pulp flocculating agent of uranium molybdenum ore from source' discloses a test research on flocculating and settling conditions of pulp with high clay content, the settling performance of the pulp is improved by adding a special-effect flocculating agent, but the problems of large using amount of the flocculating agent and small settling speed of the pulp still exist without detailed research on a flocculating agent adding mode; the application of a high-efficiency deep cone thickener in a certain uranium water smeltery in China discloses a process and a device for carrying out flocculation and sedimentation on neutral ore pulp by adopting the deep cone thickener, and realizes the industrial application of the flocculation and thickening of the neutral ore pulp. However, the problems of low production efficiency and high consumption of flocculating agent of the thickener are still not solved because the concentration of the fed ore pulp is high.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for thickening the high-clay polymetallic ore pulp improves the flocculation sedimentation speed of the pulp, reduces the consumption of a flocculating agent, obviously improves the production capacity of a thickener, solves the bottleneck technical problem restricting the production of the polymetallic ore with high clay content, and achieves the purposes of quality improvement and efficiency improvement.
The invention provides a high-clay polymetallic ore pulp thickening method, which comprises the following steps of:
step S1: performing ball milling treatment on the ore, and then grading to obtain product ore pulp;
step S2: mixing the product ore pulp with a flocculating agent, and settling the fully flocculated ore pulp to obtain a flocculating body and supernatant;
the supernatant liquid flows back to be mixed with the product pulp and a flocculating agent;
step S3: squeezing and dehydrating the flocculating body to obtain underflow and water with the solid mass fraction of 55-60%; the water overflows from the flocculation layer, enters supernatant liquor under the filtering action of the flocculation layer, returns to the step S1 for ball milling and classification, and partially returns to the step S2 for mixing with the product pulp and the flocculating agent;
the flocculant comprises: amphoteric polyacrylamide flocculant or mixture of amphoteric polyacrylamide flocculant and anionic polyacrylamide.
Preferably, the diameters of the steel balls selected during the ball milling treatment are phi 100, phi 80, phi 60 and phi 40 respectively;
the steel ball proportion of phi 100, phi 80, phi 60 and phi 40 is 20%: 25%: 35%: 20 percent;
the classification is spiral classification, and the mass concentration of overflow ore pulp of a spiral classifier is 20-40%;
in the obtained product ore pulp, the proportion of 0.180 mm-0.208 mm mineral powder is 25% -40%, and the proportion of-0.045 mm mineral powder is 30% -45%.
Preferably, a deep cone thickener is used for thickening the product ore pulp, the product ore pulp and a flocculating agent are fully mixed in a flocculation barrel, then the mixture enters a central feeding barrel, and the ore pulp is settled to obtain a flocculating body and supernatant;
and a supernatant liquid return pipe is arranged on a supernatant liquid layer on the upper part of the deep cone thickener, an automatic gate valve is arranged on the supernatant liquid return pipe, and the return flow is automatically controlled according to the concentration and the flow of the product ore pulp, so that a part of the supernatant liquid returns to the feeding cylinder of the thickener to be mixed with the product ore pulp.
Preferably, the reflux amount is 0.3m3～1.6m3/tMine。
Preferably, the addition amount of the flocculating agent is 40g/tMine～80g/tMine。
Preferably, the flocculating agent is added in two parts, one part is added through an ore pulp feeding pipe, and the included angle between a flocculating agent adding pipe and the ore pulp feeding pipe is 10-30 degrees;
the other part is added by the supernatant liquid return pipe, and the included angle between the flocculant adding pipe and the supernatant liquid return pipe is 10-30 degrees.
Preferably, the port of the flocculant adding pipe is located at the upper part of the central axis of the ore pulp feeding pipe or the supernatant liquid return pipe by 20-100 mm.
Preferably, the concentration of the flocculating agent added from the pulp feeding pipe is 0.05-0.2%, and the addition amount is 30-60% of the total addition amount.
Preferably, the concentration of the flocculating agent added from the upper part of the supernatant liquid return pipe is 0.2-0.5%, and the addition amount is 40-70% of the total addition amount.
Preferably, in the settling compression zone of the deep cone thickener, the floccules are dewatered by pressing.
Compared with the prior art, the high-clay polymetallic ore pulp thickening method disclosed by the invention strengthens the mixing and reaction process of ore pulp particles and the flocculating agent on the premise of meeting the mass concentration and granularity of subsequent leached ore pulp, obviously improves the settling speed of the ore pulp, further reduces the using amount of the flocculating agent by 20-60% in the thickening process, and realizes the efficient thickening of the ore pulp with high clay content and high mass concentration.
Drawings
FIG. 1 shows a schematic structural view of a deep cone thickener;
FIG. 2 shows a schematic diagram of a flocculant dosing line.
Detailed Description
For a further understanding of the invention, embodiments of the invention are described below in conjunction with the examples, but it should be understood that these descriptions are included merely to further illustrate features and advantages of the invention, and are not intended to limit the invention.
The embodiment of the invention discloses a high-clay polymetallic ore pulp thickening method, which comprises the following steps:
step S1: performing ball milling treatment on the ore, and then grading to obtain product ore pulp;
step S2: mixing the product ore pulp with a flocculating agent, and settling the fully flocculated ore pulp to obtain a flocculating body and supernatant;
the supernatant liquid flows back to be mixed with the product pulp and a flocculating agent;
step S3: squeezing and dehydrating the flocculating body to obtain underflow and water with the solid mass fraction of 55-60%; the water overflows from the flocculation layer, enters supernatant liquor under the filtering action of the flocculation layer, returns to the step S1 for ball milling and classification, and partially returns to the step S2 for mixing with the product pulp and the flocculating agent;
the flocculant comprises: amphoteric polyacrylamide flocculant or mixture of amphoteric polyacrylamide flocculant and anionic polyacrylamide.
In the invention, the thickening method is preferably matched with a deep cone thickener to carry out thickening treatment on the high-clay polymetallic ore pulp.
According to the present invention, in step S1, preferably, the steel balls used in the ball milling process have diameters of phi 100, phi 80, phi 60, and phi 40, respectively;
the steel ball proportion of phi 100, phi 80, phi 60 and phi 40 is 20%: 25%: 35%: 20 percent;
the classification is spiral classification, and the mass concentration of overflow ore pulp of a spiral classifier is 20-40%;
in the obtained product ore pulp, the proportion of 0.180 mm-0.208 mm mineral powder is 25% -40%, and the proportion of-0.045 mm mineral powder is 30% -45%.
Through steel ball proportioning and control of the feeding concentration of the classifier, on the premise of meeting the granularity requirement of the leaching process, the yield of fine mud is reduced, the settling speed of ore pulp is further improved, and the using amount of a flocculating agent is reduced.
Preferably, both of the step S2 and the step S3 are performed by using a deep cone thickener.
Step S2, carrying out thickening treatment on the product ore pulp by using a deep cone thickener, fully mixing the product ore pulp and a flocculating agent in a flocculation barrel, then feeding the mixture into a central feeding barrel, and settling the ore pulp to obtain a flocculating body and supernatant;
and a supernatant liquid return pipe is arranged on a supernatant liquid layer on the upper part of the deep cone thickener, an automatic gate valve is arranged on the supernatant liquid return pipe, and the return flow is automatically controlled according to the concentration and the flow of the product ore pulp, so that a part of the supernatant liquid returns to the feeding cylinder of the thickener to be mixed with the product ore pulp.
Preferably, the reflux amount is 0.3m3～1.6m3/tMine。
Preferably, the addition amount of the flocculating agent is 40g/tMine～80g/tMine。
The flocculant is added in two parts, one part is added through an ore pulp feeding pipe, and the included angle between a flocculant adding pipe and the ore pulp feeding pipe is 10-30 degrees; the concentration of the flocculating agent added from the ore pulp feeding pipe is 0.05-0.2 percent, and the adding amount is 30-60 percent of the total adding amount.
The other part is added by the supernatant liquid return pipe, and the included angle between the flocculant adding pipe and the supernatant liquid return pipe is 10-30 degrees. The concentration of the flocculating agent added from the upper part of the supernatant liquid return pipe is 0.2 to 0.5 percent, and the adding amount is 40 to 70 percent of the total adding amount.
The port of the flocculating agent adding pipe is located at the upper part of the central axis of the ore pulp feeding pipe or the upper clear liquid return pipe by 20-100 mm.
And step S3, squeezing and dewatering the floccule in a settling and compressing area of the deep cone thickener.
The method of the invention is matched with the deep cone thickener, and adopts the measures of ore grinding grading control, ore pulp feeding process regulation and control, flocculating agent feeding mode control and the like, so that the mixing and reaction process of ore pulp particles and flocculating agent is strengthened, the ore pulp sedimentation speed is obviously improved, the flocculating agent consumption in the thickening process is reduced by 20-60%, the production capacity of the deep cone thickener is improved by 20-50%, and the high-efficiency thickening of the ore pulp with high clay content and high quality concentration is realized.
For further understanding of the present invention, the following detailed description is given to a method for thickening a high-clay polymetallic ore slurry according to the present invention with reference to the following examples, and the scope of the present invention is not limited by the following examples.
Example 1
The content of clay minerals in the uranium molybdenum polymetallic ore with high clay content is 30 percent. The raw ore is crushed in three stages and then enters an ore grinding system consisting of a ball milling-spiral classifier. Through test optimization, the proportion of steel balls in the ball mill is adjusted to be phi 100 to phi 80 to phi 60 to phi 40 to 20 percent to 25 percent to 35 percent to 20 percent, the mass concentration of an ore grinding product obtained by overflowing the spiral classifier is 35 percent, the proportion of 0.180 mm-0.208 mm ore powder is 35 percent, and the proportion of-0.045 mm ore powder is 40 percent.
And conveying the ground product ore pulp to a deep cone thickener by a slurry pump for flocculation thickening operation, wherein the deep cone thickener is shown as figure 1. The prepared amphoteric flocculant FZ3802 solution has the concentration of 0.1 percent, and the adding amount is measured according to 20g/t ore. The first flocculating agent pipe 1 is inserted into the upper part of the central shaft of the pulp feeding pipe 2 by 40mm and is inclined forward by 15 degrees, as shown in figure 2. The flocculating agent in the first flocculating agent pipe 1 and the ore pulp in the ore pulp feeding pipe 2 are fully mixed in the flocculating barrel 3 and then enter the central feeding barrel 4 of the deep cone thickener. According to the concentration and flow of the fed ore pulp, the backflow amount of the backflow pipe gate valve is automatically adjusted to be 1.0m3/tMine. The second flocculating agent pipe 5 is also amphoteric flocculating agent FZ3802 solution with concentration of 0.25%, and the adding amount is 20g/tMine. The second flocculating agent pipe 5 is inserted into the upper part of the central shaft of the overflow return liquid pipe 6 by 50mm and is inclined forwards by 20 degrees. The reflux solution and the pre-flocculated ore pulp are fully and uniformly mixed in a central feeding cylinder 4 of the deep cone thickener,After the reaction, discharging the reaction product from the bottom of the feeding cylinder to a sedimentation compression area 7 of a thickener, and extruding and dehydrating the flocculating constituent in the compression area to obtain underflow with the mass fraction of 55% of solid; the water separated from the floc rises from the flocculation layer and overflows, enters the upper clarification zone 8 under the filtering action of the flocculation layer, and overflows and returns to the ore grinding process, so that the solid content in the water can be reduced to 0.08%.
On the premise of meeting the requirement of the granularity of subsequent leached ore pulp, the concentration of the ore pulp before leaching the uranium-molybdenum polymetallic ore with high clay content is improved by 5 percent, the using amount of a flocculating agent is reduced by 40 percent, the production capacity of a deep cone thickener is improved by 20 percent, and the high-efficiency thickening of the ore pulp with high clay content and high mass concentration is realized.
Example 2
The raw ore of a certain weathered uranium-rare earth polymetallic ore is crushed in three sections and then enters an ore grinding system consisting of a ball milling-spiral classifier. Through test optimization, the proportion of steel balls in the ball mill is adjusted to be phi 100 to phi 80 to phi 60 to phi 40 to 20 percent to 28 percent to 34 percent to 18 percent, the mass concentration of an ore grinding product obtained by overflowing the spiral classifier is 33 percent, the proportion of 0.180 mm-0.208 mm ore powder is 40 percent, and the proportion of-0.045 mm ore powder is 34 percent.
And conveying the ground product ore pulp to a deep cone thickener by a slurry pump to perform flocculation thickening operation. The first flocculating agent pipe is internally provided with a prepared amphoteric polyacrylamide flocculating agent WZ944 solution with the concentration of 0.1 percent, and the adding amount is 30g/tMineAnd (6) metering. The first flocculating agent pipe is inserted into the upper part of the center of the pulp feeding pipe by 30mm and is inclined forward by 15 degrees. The flocculating agent in the first flocculating agent pipe and the ore pulp in the ore pulp feeding pipe are fully mixed in the flocculating barrel and then enter the central feeding barrel of the deep cone thickener. According to the concentration and flow of the fed ore pulp, the backflow amount of the backflow pipe gate valve is automatically adjusted to be 1.2m3/tMine. The second flocculating agent pipe is internally provided with an anionic polyacrylamide flocculating agent AZ5002 solution with the concentration of 0.3 percent and the adding amount of 35g/tMine. The second flocculating agent pipe is inserted into the upper part of the center of the overflow return liquid pipeline by 50mm and is inclined forward by 25 degrees. The reflux solution and the pre-flocculated ore pulp are fully mixed and reacted in a central feeding cylinder of a deep cone thickener, then the mixture is discharged from the bottom of the feeding cylinder to a sedimentation compression area of the thickener, and a flocculating body is extruded and dehydrated in the compression area to obtain 5Underflow at 2% solids mass fraction; the water separated from the floc rises from the flocculation layer and overflows, enters the upper clarification area under the filtering action of the flocculation layer, overflows and returns to the ore grinding process, and the solid content in the water can be reduced to 0.06%.
On the premise of meeting the requirement of the granularity of the subsequently leached ore pulp, the concentration of the ore pulp before leaching the weathered uranium-rare earth polymetallic ore is improved by 6 percent, the dosage of a flocculating agent is reduced by 35 percent, and the production capacity of a deep cone thickener is improved by 40 percent.
Example 3
The content of clay mineral in uranium vanadium polymetallic ore with high clay content is 20 percent. The raw ore is crushed in three stages and then enters an ore grinding system consisting of a ball milling-spiral classifier. Through test optimization, the proportion of steel balls in the ball mill is adjusted to be phi 100 to phi 80 to phi 60 to phi 40 to 20 percent to 25 percent to 35 percent to 20 percent, the mass concentration of an ore grinding product obtained by overflowing the spiral classifier is 40 percent, the proportion of 0.180 mm-0.208 mm ore powder is 42 percent, and the proportion of-0.045 mm ore powder is 30 percent.
And conveying the ground product ore pulp to a deep cone thickener by a slurry pump to perform flocculation thickening operation. The first flocculating agent pipe is internally provided with a prepared amphoteric polyacrylamide flocculating agent FZ3802 solution with the concentration of 0.2 percent, and the adding amount is 42g/tMineAnd (6) metering. The first flocculating agent pipe is inserted into the upper part of the center of the pulp feeding pipe by 40mm and is inclined forward by 25 degrees. The flocculating agent in the first flocculating agent pipe and the ore pulp in the ore pulp feeding pipe are fully mixed in the flocculating barrel and then enter the central feeding barrel of the deep cone thickener. According to the concentration and flow of the fed ore pulp, the backflow amount of the backflow pipe gate valve is automatically adjusted to be 1.6m3/tMine. The concentration of the anionic polyacrylamide flocculant AZ5005 solution in the second flocculant tube is 0.35 percent, and the addition amount is 35g/tMine. The second flocculating agent pipe is inserted into the upper part of the central shaft of the overflow return liquid pipeline by 60mm and is inclined forwards by 20 degrees. The reflux solution and the pre-flocculated ore pulp are fully and uniformly mixed and reacted in a central feeding cylinder of a deep cone thickener, then the mixture is discharged from the bottom of the feeding cylinder to a sedimentation compression area of the thickener, and a flocculating body is extruded and dehydrated in the compression area to obtain underflow with the solid mass fraction of 60 percent; the water separated from the floc rises from the flocculation layer and overflows into the upper clarification area under the filtering action of the flocculation layerReturning to the ore grinding process, the solid content in the water can be reduced to 0.1%.
On the premise of meeting the requirement of the granularity of subsequent leached ore pulp, the concentration of the ore pulp before leaching the uranium vanadium polymetallic ore with high clay content is improved by 8 percent, the dosage of a flocculating agent is reduced by 22 percent, and the production capacity of a deep cone thickener is improved by 50 percent.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A high-clay polymetallic ore pulp thickening method is characterized by comprising the following steps:
step S1: performing ball milling treatment on the ore, and then grading to obtain product ore pulp;
step S2: mixing the product ore pulp with a flocculating agent, and settling the fully flocculated ore pulp to obtain a flocculating body and supernatant;
the supernatant liquid flows back to be mixed with the product pulp and a flocculating agent;
step S3: squeezing and dehydrating the flocculating body to obtain underflow and water with the solid mass fraction of 55-60%; the water overflows from the flocculation layer, enters supernatant liquor under the filtering action of the flocculation layer, returns to the step S1 for ball milling and classification, and partially returns to the step S2 for mixing with the product pulp and the flocculating agent;
the flocculant comprises: amphoteric polyacrylamide flocculant or mixture of amphoteric polyacrylamide flocculant and anionic polyacrylamide.
2. The high-clay polymetallic ore pulp thickening method according to claim 1, wherein the diameters of the selected steel balls are phi 100, phi 80, phi 60 and phi 40 respectively during ball milling treatment;
the steel ball proportion of phi 100, phi 80, phi 60 and phi 40 is 20%: 25%: 35%: 20 percent;
the classification is spiral classification, and the mass concentration of overflow ore pulp of a spiral classifier is 20-40%;
in the obtained product ore pulp, the proportion of 0.180 mm-0.208 mm mineral powder is 25% -40%, and the proportion of-0.045 mm mineral powder is 30% -45%.
3. The high clay polymetallic ore pulp thickening process according to claim 2,
carrying out thickening treatment on the product ore pulp by using a deep cone thickener, fully mixing the product ore pulp and a flocculating agent in a flocculation barrel, then feeding the mixture into a central feeding barrel, and settling the ore pulp to obtain a flocculating body and a supernatant;
and a supernatant liquid return pipe is arranged on a supernatant liquid layer on the upper part of the deep cone thickener, an automatic gate valve is arranged on the supernatant liquid return pipe, and the return flow is automatically controlled according to the concentration and the flow of the product ore pulp, so that a part of the supernatant liquid returns to the feeding cylinder of the thickener to be mixed with the product ore pulp.
4. The high clay polymetallic ore pulp thickening process according to claim 3, wherein the amount of backflow is 0.3m3～1.6m3/tMine。
5. The high clay polymetallic ore pulp thickening method according to claim 1, wherein the addition amount of the flocculating agent is 40g/tMine～80g/tMine。
6. The high-clay polymetallic ore pulp thickening method according to any one of claims 3 to 5, wherein the flocculating agent is added in two parts, one part is added through an ore pulp feeding pipe, and the included angle between a flocculating agent adding pipe and the ore pulp feeding pipe is 10-30 degrees;
the other part is added by the supernatant liquid return pipe, and the included angle between the flocculant adding pipe and the supernatant liquid return pipe is 10-30 degrees.
7. The high-clay polymetallic ore pulp thickening method according to claim 6, wherein the port of the flocculating agent adding pipe is located at the upper part of the central axis of the ore pulp feeding pipe or the supernatant liquid return pipe by 20-100 mm.
8. The high clay polymetallic ore pulp thickening method according to claim 6, characterized in that the flocculant added from the pulp feed pipe has a concentration of 0.05-0.2% and an addition amount of 30-60% of the total addition amount.
9. The high clay polymetallic ore pulp thickening method according to claim 6, characterized in that the flocculant added from the upper part of the supernatant liquid reflux pipe has a concentration of 0.2-0.5% and an addition amount of 40-70% of the total addition amount.
10. The high clay polymetallic ore pulp thickening process according to claim 3, wherein the flocculants are press dewatered in the settling compression zone of the deep cone thickener.
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