CN112403666A - Flotation process flow configuration method for refractory collophanite - Google Patents
Flotation process flow configuration method for refractory collophanite Download PDFInfo
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- CN112403666A CN112403666A CN202011190246.1A CN202011190246A CN112403666A CN 112403666 A CN112403666 A CN 112403666A CN 202011190246 A CN202011190246 A CN 202011190246A CN 112403666 A CN112403666 A CN 112403666A
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- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Abstract
The invention discloses a method for configuring a flotation process flow of refractory collophanite, and relates to the technical field of collophanite flotation. The preparation method specifically comprises the steps that flotation machines with the same specification are arranged in parallel according to series of flotation devices, each series of flotation devices is composed of a roughing flotation machine and a concentrating flotation machine, and the number of the roughing flotation machines and the quantity of the concentrating flotation machines in adjacent series are respectively the same; the collophanite pulp from the size mixing tank is uniformly distributed to each series of flotation devices for roughing and fine selection; and after rough concentration, the underflow enters fine concentration, the overflow foam is used as tailings, the underflow after fine concentration is phosphate concentrate, and the overflow foam is used as middlings and is completely returned to the 1 st rough concentration tank for secondary flotation. The original series connection mode is changed into the parallel connection mode, the flotation time of ore pulp on each flotation machine is prolonged, the refractory collophanite is subjected to parallel shunting flotation, the flotation time of roughing operation can be doubled or more, the total flotation time is increased by more than 6 minutes, and tailings P are floated2O5The content is reduced by 1-3%, and the consumption of the medicament is reduced by 10-30%.
Description
Technical Field
The invention relates to the technical field of collophanite flotation, in particular to a method for configuring a flotation process flow of refractory collophanite.
Background
Phosphate rock is an important component in agricultural fertilizers and phosphorus-based chemical preparations as a non-renewable resource. With the development of economy, the demand for phosphate ore is also continuously and rapidly increasing. Although China is a large country of phosphorite resources, among the proven phosphorites, mainly sedimentary phosphorite (collophanite) accounts for 80% of the total amount, and most of the phosphorite is medium-low grade collophanite. The ore has the characteristics of low grade, complex structure, fine embedded granularity, difficult dissociation and the like. And with the continuous exploitation and utilization of phosphorite resources, the properties of ores become increasingly poor, fine and miscellaneous, so that the ores are more difficult to select. Among them, flotation is the most effective beneficiation process of collophanite. The conventional flotation process flow configuration is characterized in that flotation cells with different specifications or the same specifications are connected in series one by one, the classified ore pulp flows through the cells in sequence, and the flotation cells finish roughing, fine selection, scavenging and recleaning of collophanite from front to back in sequence to obtain qualified phosphate concentrate.
Because the collophanite is difficult to grind, the composition range of each grade is narrow, the conventional classification concentration classification efficiency is poor, and the coarse and fine grade impurities are serious, so that the flotation fineness requirement is difficult to meet, therefore, the classification feeding water quantity needs to be increased, the feeding concentration is reduced, the classification efficiency is improved, and the ore pulp meeting the flotation fineness requirement is obtained. The conventional classification concentration is about 28 percent, but in order to improve the classification efficiency, the concentration of the collophanite pulp entering the flotation after classification is generally 25 percent, and the total volume of the pulp can be increased by 20 to 30m when the pulp concentration is reduced by 1 percent in the process3H, the flow rate of the pulp entering the flotation cell per unit time is increased under the condition of ensuring that the daily treatment capacity is not reduced and the number of the flotation cells or the total volume is not changed, so that the adjustment capacity of the flotation cell is poor, particularly in the flotationUnder the condition that the volume of the tank is relatively small, the increase of the flow velocity of ore pulp can cause the increase of the consumption of the medicament and the fluctuation of flotation indexes, impurities are difficult to effectively remove, and the quality of flotation products is difficult to control.
Disclosure of Invention
The invention aims to provide a method for configuring a flotation process flow of refractory collophanite, which solves the problems of increased consumption of flotation reagents and difficult control of flotation quality when the concentration of ore pulp is reduced.
In order to solve the technical problems, the invention adopts the following technical scheme: a flotation process flow configuration method for refractory collophanite is characterized by comprising the following steps:
(1) the flotation machines with the same specification are arranged in parallel according to series of flotation devices, each series of flotation devices consists of a roughing flotation machine and a concentrating flotation machine, and the number of the roughing flotation machines and the quantity of the concentrating flotation machines in adjacent series are respectively the same;
(2) the collophanite pulp from the size mixing tank is uniformly distributed to each series of flotation devices for roughing and fine selection;
(3) and after rough concentration, the underflow enters fine concentration, the overflow foam is used as tailings, the underflow after fine concentration is phosphate concentrate, and the overflow foam is used as middlings and is completely returned to the 1 st rough concentration tank for secondary flotation.
The further technical proposal is that P in the collophanite is2O518-28 percent of MgO, 2-10 percent of SiO2The content is more than 13 percent, the concentration of the collophanite pulp is 20 to 28 percent, and the content of ore grinding fineness of-0.074 mm is more than 70 percent.
The further technical proposal is that the specification of the flotation machine is 30m3One table or 50m3A table.
The further technical scheme is that the series of flotation devices are arranged into a double series, wherein in a single series, 2-3 roughing flotation machines and 3 concentrating flotation machines are arranged.
A further technical scheme is that a collector YP6 is used in the flotation process, and the using amount of the collector YP6 is 0.3-2.0 kg/t of raw ore.
The working mechanism is as follows: for refractory collophanite, the number and volume of the cells are the sameIn case of evenly dividing the pulp into 2 or more parallel series for parallel flotation, the flow rate of the pulp per unit time is shortened to 1/2 and 1/3 … due to the multiple series of branches, and the flotation time is increased by 2 times and 3 times … respectively in one operation. Because the ore pulp is shunted in parallel and the flow velocity is reduced, the flotation time is prolonged, the foam mechanical inclusion is reduced, the flotation selectivity is improved, and compared with the series connection, the flotation tailings P2O5The content is reduced by 1-3%, the flotation process is optimized from one-time roughing and one-time concentrating and one-time scavenging operation to one-time roughing and one-time concentrating operation, and the middling return amount is reduced by 20-50%. After series of flotation devices are connected in parallel, the use amounts of the flotation regulator and the collector are respectively reduced by 10-30%.
Compared with the prior art, the invention has the beneficial effects that:
1. the flotation time of the ore pulp on each flotation machine is prolonged, the flotation quality is improved, the medicament consumption and the tailing grade are reduced, the flotation process flow is short, the configuration is simple, and the operation and the control are easy.
2. To P2O518-28 percent of content, 2-10 percent of MgO content and SiO2The refractory collophanite with the content of more than 13 percent can improve the flotation time of the roughing operation by more than one time, increase the total flotation time by more than 6 minutes and float the tailings P by parallel shunt flotation2O5The content is reduced by 1-3%, and the consumption of the medicament is reduced by 10-30%.
Drawings
Fig. 1 is a flow chart of a prior art series flotation process.
FIG. 2 is a flow diagram of a parallel flotation process of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
To P2O5The average content is about 22 percent, the average content of MgO is 5 to 6 percent, and SiO is2Content is equalThe refractory carbonate collophanite with 13-15% of ore fineness of 80-85% and flotation pulp concentration of 20-26% is prepared by coarse flotation and fine flotation in 30m3The flotation machines are arranged in series, wherein 3 roughing, 7 concentrating and 2 scavenging are carried out, and when the treatment capacity is 130 tons/hour and the flotation concentration is 25 percent, the pulp volume is 436.34m3The flotation time is 8.57min, the total flotation time is 36min, and the consumption of the collector YP6 is 1.4kg/t of raw ore.
Under the condition of unchanged number of flotation machines, the flotation process is optimized and reconstructed to be configured into two series of parallel flotation process flows, one roughing and one concentrating operation are carried out, and 30m is adopted3The flotation machines are configured in parallel, wherein 3 single-series roughers and 3 fine cleaners are adopted, collophanite pulp from the size mixing tank is uniformly distributed into a rougher 1 st tank in a double-series flotation device, the pulp is subjected to rougher flotation and fine cleaning in sequence, wherein underflow after rougher flotation enters fine cleaning, overflow foam enters a tailing pond as tailings, underflow after fine cleaning enters a finished product pond as phosphate concentrate after treatment, and overflow foam as middlings is completely returned to the rougher 1 st tank for flotation again.
When the treatment capacity is 130 tons/hour and the flotation concentration is 25 percent, the volume of the ore pulp is 218.17m3And h, the roughing flotation time is 17.14min, the total flotation time is 42min, and the consumption of the collector YP6 is 1.2kg/t of raw ore. P in tailings2O5The content is reduced from 6.72% to 5.41%.
Example 2
To P2O5About 21% of MgO, 5-6% of SiO2The refractory carbonate collophanite with an average content of 13-15% is prepared by the original serial flotation process including rough concentration once, fine concentration once and scavenging once under the conditions that the content of grinding fineness of-0.074 mm is 70-80% and the concentration of flotation pulp is 24-28%, and 50m is adopted3The flotation machines are arranged in series, wherein 3 roughing machines, 5 concentrating machines and 2 scavenging machines are arranged, when the treatment capacity is 140 tons/hour and the flotation concentration is 25 percent, the pulp volume is 470m3The roughing flotation time is 17min, the total flotation time is 56min, and the consumption of the collector YP6 is 1.6kgT raw ore.
Under the condition that the number of flotation machine tables is not changed, the flotation process is optimized and reconfigured into two series of operation of rough concentration and fine concentration in parallel, wherein 2 single series of rough concentration and 3 fine concentration are performed, collophanite pulp from a size mixing tank is uniformly distributed into a rough concentration 1 st tank in a double series of flotation devices, the pulp is subjected to rough concentration and fine concentration in sequence, wherein underflow after rough concentration enters fine concentration, overflow foam enters a tailing pond as tailings, the underflow after fine concentration enters a finished product pond as phosphate concentrate after treatment, and the overflow foam as middlings is completely returned to the rough concentration 1 st tank for flotation again.
When the treatment capacity is 140 tons/hour and the flotation concentration is 25 percent, the volume of the ore pulp is 235m3And h, the roughing flotation time is 34min, the total flotation time is 64min, and the consumption of the collector YP6 is 1.3kg/t of raw ore. P in tailings2O5The content is reduced from 6.45% to 4.64%.
Example 3
To P2O5About 19 percent, 2 to 3 percent of MgO and SiO2The refractory mixed collophanite with 28-35% content is produced through once coarse selection, once fine selection, once scavenging and once secondary selection in the original serial flotation process flow under the conditions of ore grinding fineness of-0.074 mm and content of more than 90% and flotation pulp concentration of 25-28%, and 30m flotation process flow is adopted3The flotation machines are arranged in series, wherein 3 roughing, 7 concentrating and 2 scavenging are carried out, when the treatment capacity is 150 tons/hour and the flotation concentration is 25 percent, the pulp volume is 504m3And h, the roughing flotation time is 20min, the total flotation time is 80min, and the consumption of the collector YP6 is 2kg/t of raw ore.
Under the condition that the number of flotation machine tables is not changed, optimizing and reconstructing the flotation process into two series of operation of roughing and concentrating once in parallel, wherein 3 roughing operation and 3 concentrating operation are performed in a single series, collophanite pulp from a size mixing tank is uniformly distributed into a roughing 1 st tank in a double series of flotation devices, the pulp is subjected to roughing and concentrating in sequence, underflow enters concentrating after roughing, overflow foam enters a tailing tank as tailings, the underflow enters a finished product tank after concentrating is treated as phosphate concentrate, and the overflow foam is completely returned to the roughing 1 st tank as middlings for flotation again.
When the treatment capacity is 150 tons/hour and the flotation concentration is 25 percent, the pulp volume is 252m3The flotation time per hour of rough concentration is 40min, the total flotation time is 114min, and the consumption of the collector YP6 is 1.4kg/t of raw ore. P in tailings2O5The content is reduced from 7.45% to 6.44%.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts or arrangements, other uses will also be apparent to those skilled in the art.
Claims (5)
1. A flotation process flow configuration method for refractory collophanite is characterized by comprising the following steps:
(1) the flotation machines with the same specification are arranged in parallel according to series of flotation devices, each series of flotation devices consists of a roughing flotation machine and a concentrating flotation machine, and the number of the roughing flotation machines and the quantity of the concentrating flotation machines in adjacent series are respectively the same;
(2) the collophanite pulp from the size mixing tank is uniformly distributed to each series of flotation devices for roughing and fine selection;
(3) and after rough concentration, the underflow enters fine concentration, the overflow foam is used as tailings, the underflow after fine concentration is phosphate concentrate, and the overflow foam is used as middlings and is completely returned to the 1 st rough concentration tank for secondary flotation.
2. The method for configuring flotation process flow of refractory collophanite according to claim 1 is characterized in that: p in the collophanite2O518-28 percent of MgO, 2-10 percent of SiO2The content is more than 13 percent, the concentration of the collophanite pulp is 20 to 28 percent, and the content of ore grinding fineness of-0.074 mm is more than 70 percent.
3. The method for configuring flotation process flow of refractory collophanite according to claim 1 is characterized in that: the specification of the flotation machine is 30m3One table or 50m3A table.
4. The method for configuring flotation process flow of refractory collophanite according to claim 1 is characterized in that: the series of flotation devices are arranged into a double series, wherein in a single series, 2-3 roughing flotation machines and 3 concentrating flotation machines are arranged.
5. The method for configuring flotation process flow of refractory collophanite according to claim 1 is characterized in that: the collector YP6 is used in the flotation process, and the using amount is 0.3-2.0 kg/t of raw ore.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001039888A1 (en) * | 1999-11-30 | 2001-06-07 | Wmc Resources Limited | Improved flotation of sulphide minerals |
| US20080149536A1 (en) * | 2005-03-07 | 2008-06-26 | Outotec Oyj | Method of Floating and Flotation Circuit |
| CN102886306A (en) * | 2012-07-18 | 2013-01-23 | 云南磷化集团有限公司 | Column-slot combined technology for grading calcium collophanite |
| CN108144754A (en) * | 2017-02-25 | 2018-06-12 | 繁昌县聚成新能源有限责任公司 | Sulphur production technology is independently selected in a kind of flotation |
| CN108144755A (en) * | 2017-02-25 | 2018-06-12 | 繁昌县聚成新能源有限责任公司 | A kind of flotation machine production line for independently selecting sulphur |
-
2020
- 2020-10-30 CN CN202011190246.1A patent/CN112403666A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001039888A1 (en) * | 1999-11-30 | 2001-06-07 | Wmc Resources Limited | Improved flotation of sulphide minerals |
| US20080149536A1 (en) * | 2005-03-07 | 2008-06-26 | Outotec Oyj | Method of Floating and Flotation Circuit |
| CN102886306A (en) * | 2012-07-18 | 2013-01-23 | 云南磷化集团有限公司 | Column-slot combined technology for grading calcium collophanite |
| CN108144754A (en) * | 2017-02-25 | 2018-06-12 | 繁昌县聚成新能源有限责任公司 | Sulphur production technology is independently selected in a kind of flotation |
| CN108144755A (en) * | 2017-02-25 | 2018-06-12 | 繁昌县聚成新能源有限责任公司 | A kind of flotation machine production line for independently selecting sulphur |
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Application publication date: 20210226 |