CN113843183B - Fluorite sorting method for Baiyunebo iron-containing surrounding rock - Google Patents
Fluorite sorting method for Baiyunebo iron-containing surrounding rock Download PDFInfo
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- CN113843183B CN113843183B CN202111180585.6A CN202111180585A CN113843183B CN 113843183 B CN113843183 B CN 113843183B CN 202111180585 A CN202111180585 A CN 202111180585A CN 113843183 B CN113843183 B CN 113843183B
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- fluorite
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- surrounding rock
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
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- 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
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
-
- 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
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a fluorite sorting method of a Baiyunebo iron-containing surrounding rock, which comprises the following steps: s1, crushing and screening tailings after iron separation of the baiyunebo iron-containing surrounding rock to obtain a mineral sample; s2, carrying out primary separation on the ore sample obtained in the step S1 to obtain fluorite rough concentrate and tailings; s3, grinding and secondarily floating the fluorite rough concentrate obtained in the step S2 to obtain fluorite concentrate. According to the invention, coarse separation is performed through photoelectric intelligent separation, and then secondary flotation is performed, and in the flotation process, through the synergistic effect of sodium silicate, sodium carbonate, sodium petroleum sulfonate, dodecyl amine and vegetable oil, on one hand, the doping entrainment of rare earth and iron in the flotation process can be effectively reduced; on the other hand, the method has better floatation capability on fluorite, and achieves the purpose of improving the grade of fluorite concentrate while improving the yield of fluorite concentrate.
Description
Technical Field
The invention belongs to the technical field of mineral separation, and particularly relates to a fluorite separation method of a Baiyunebo iron-containing surrounding rock.
Background
The Baiyunebo mine is the largest rare earth deposit in the world, which is a multi-metal complex refractory mineral, such as iron, rare earth, niobium, manganese, phosphorus, fluorine, etc., the surrounding rock of the iron ore body mainly consists of dolomite, magnetite, hematite, columbite and silicate, and the main chemical components are CaO25-30%, mgO 10-15% and SiO 2 4-10%, rare earth oxide total (RExOy) 2-6%, nb 2 O 5 0.004-0.15%, TFe4-24%, mnO < 2%, P0.2-1.0%, F2-4% (where Nb is an enriched zone of niobium) 2 O 5 Up to 1%).
In recent years, work done from the aspect of comprehensive utilization of the bayan obo minerals is never stopped, and currently, an iron selecting production line, a fluorite selecting production line, a rare earth selecting production line, a niobium selecting production line and a scandium selecting production line are selected for the production line for comprehensive utilization of the bayan obo minerals.
The fluorite in the bayan obo ore mainly appears in the form of accompanied iron minerals, and the associated fluorite has the characteristics of low grade, multiple types and fine mineral embedding granularity, and the characteristics of the special multiple, lean, impurity and fine of the bayan obo ore increase the difficulty for comprehensive utilization of useful minerals despite the fact that the ore is rich in fluorite.
In the existing Baiyunebo-based fluorite production line, the ore feeding grade of raw ore is only 10% -15%, a large amount of rare earth minerals enter fluorite concentrate in the fluorite flotation process through a coarse seven-concentrate ore dressing process, rare earth minerals are seriously mixed in the fluorite concentrate, the grade of the fluorite concentrate is reduced, meanwhile, iron-containing impurity minerals are entrained into the fluorite concentrate, the grade of the fluorite concentrate is further reduced, the grade of the selected fluorite concentrate is generally about 80%, and the product value, the utilization rate and the added value of the fluorite concentrate are lower.
Therefore, there is a need to develop a new fluorite separation method that can improve the grade of fluorite concentrate in the iron-bearing surrounding rock of bayan obo iron ore.
Disclosure of Invention
In order to solve the technical problems, the invention provides a fluorite sorting method for a Bayan obo iron-containing surrounding rock.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a fluorite sorting method of a bayan obo iron-containing surrounding rock, which is characterized by comprising the following steps:
s1, crushing and screening tailings after iron separation of the baiyunebo iron-containing surrounding rock to obtain a mineral sample;
s2, carrying out primary separation on the ore sample obtained in the step S1 to obtain fluorite rough concentrate and tailings;
s3, grinding and secondarily floating the fluorite rough concentrate obtained in the step S2 to obtain fluorite concentrate.
Preferably, the particle size of the mineral sample in step S1 is less than 40mm.
Preferably, the primary sorting in step S2 is: the photoelectric intelligent separator is utilized to separate, specifically, the intelligent photoelectric separator is utilized to scan a part of raw ores to obtain ore data, and different waste throwing rates are set from low to high through an intelligent recognition algorithm until a preset concentrate index is obtained.
Preferably, the tailings in step S2 have a particle size of 0-10mm.
Preferably, the particle size of the grinding in the step S3 is required to be more than 95% of-200 meshes.
Preferably, the addition amount of the flotation reagent in the secondary flotation process in step S3 is as follows: 0.2-0.5kg of flotation reagent is added to each ton of fluorite rough concentrate.
Further preferably, the flotation reagent consists of acid water glass, sodium carbonate, sodium petroleum sulfonate, dodecyl amine and vegetable oil.
Further preferably, the vegetable oil is at least one of peanut oil, soybean oil, rapeseed oil and corn oil; most preferably the mass ratio is 3:1 soybean oil and corn oil.
Further preferably, the preparation method of the acid water glass comprises the following steps: adding 3-8% of water glass solution by mass percent into 3-8% of sulfuric acid aqueous solution by mass percent according to the weight ratio of 1:1, and stirring and mixing for 20-30min.
Further preferably, the mass ratio of the acid water glass to the sodium carbonate to the sodium petroleum sulfonate to the dodecyl amine to the vegetable oil is 3-5:1-3:1-3:2-6:0.1-0.5.
Preferably, the flotation conditions of the secondary flotation in step S3 are: the weight percentage concentration of the flotation ore pulp is 30-40%, the flotation temperature is 30-35 ℃, and the pH value is 6.8-7.2.
Further preferably, the flotation reagents are added in the following order: water glass, sodium carbonate, sodium petroleum sulfonate, dodecyl amine and vegetable oil.
Compared with the prior art, the invention has the following advantages and effects:
(1) According to the fluorite separation method of the bayan obo surrounding rock, through photoelectric intelligent separation and secondary flotation, impurity doping and entrainment in the flotation process can be effectively reduced, and the purpose of improving the grade of fluorite concentrate is achieved.
(2) According to the flotation reagent, on one hand, the doping entrainment of rare earth and iron in the flotation process can be effectively reduced through the synergistic effect of sodium silicate, sodium carbonate, sodium petroleum sulfonate, dodecyl amine and vegetable oil; on the other hand, the method has better floatation capability on fluorite, and achieves the purpose of improving the grade of fluorite concentrate while improving the yield of fluorite concentrate.
(3) The preparation has the advantages of wide sources of main raw materials, environmental friendliness, simple preparation process, stable performance and strong adaptability, and is suitable for popularization and application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention are further described in detail below.
Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
If no special description exists, the raw materials adopted by the invention are all common commercial products, the solvents in the solution are all water, and in order to reduce the cost, the vegetable oil in the invention is the vegetable oil with the quality guarantee period.
Example 1
A fluorite sorting method of a bayan obo iron-containing surrounding rock, which is characterized by comprising the following steps:
s1, crushing and screening tailings after iron separation of the baiyunebo iron-containing surrounding rock to obtain a mineral sample with the particle size smaller than 40mm.
S2, carrying out primary separation on the ore sample obtained in the step S1 by using a photoelectric intelligent separator to obtain fluorite rough concentrate and tailings with the particle size of 0-10 mm;
specifically, an intelligent photoelectric separator is used for scanning a part of raw ores to obtain ore data, and different waste throwing rates are set from low to high through an intelligent recognition algorithm until a preset concentrate index is obtained.
S3, grinding the fluorite rough concentrate obtained in the step S2 until the granularity is more than 95% of-200 meshes, and adding 0.5kg of flotation reagent/ton of fluorite rough concentrate for secondary flotation to obtain fluorite concentrate;
the weight percentage concentration of the ore pulp in the secondary flotation is 30%, the flotation temperature is 30-35 ℃, the pH value is 6.8-7.2, and the addition sequence of the flotation reagents is as follows: water glass, sodium carbonate, sodium petroleum sulfonate, dodecyl amine and vegetable oil;
specifically, the mass ratio of the acid water glass to the sodium carbonate to the petroleum sodium sulfonate to the dodecyl amine to the vegetable oil is 3:1:3:2:0.5;
the vegetable oil is prepared from the following components in percentage by mass: 1 soybean oil and corn oil;
the preparation method of the acid water glass comprises the following steps: adding 8% sodium silicate solution by mass percent into 8% sulfuric acid aqueous solution by mass percent according to the weight ratio of 1:1, and stirring and mixing for 20-30min.
Example 2
A fluorite sorting method of a bayan obo iron-containing surrounding rock, which is characterized by comprising the following steps:
s1, crushing and screening tailings after iron separation of the baiyunebo iron-containing surrounding rock to obtain a mineral sample with the particle size smaller than 40mm.
S2, carrying out primary separation on the ore sample obtained in the step S1 by using a photoelectric intelligent separator to obtain fluorite rough concentrate and tailings with the particle size of 0-10 mm;
specifically, an intelligent photoelectric separator is used for scanning a part of raw ores to obtain ore data, and different waste throwing rates are set from low to high through an intelligent recognition algorithm until a preset concentrate index is obtained.
S3, grinding the fluorite rough concentrate obtained in the step S2 until the granularity is more than 95% of-200 meshes, and adding 0.4kg of flotation reagent/ton of fluorite rough concentrate for secondary flotation to obtain fluorite concentrate;
the weight percentage concentration of the ore pulp in the secondary flotation is 40%, the flotation temperature is 30-35 ℃, the pH value is 6.8-7.2, and the addition sequence of the flotation reagents is as follows: acidic water glass, sodium carbonate, sodium petroleum sulfonate, dodecyl amine and vegetable oil;
specifically, the mass ratio of the acid water glass to the sodium carbonate to the petroleum sodium sulfonate to the dodecyl amine to the vegetable oil is 5:3:1:6:0.1;
the vegetable oil is prepared from the following components in percentage by mass: 1 soybean oil and corn oil;
the preparation method of the acid water glass comprises the following steps: adding 3% sodium silicate solution by mass percent into 3% sulfuric acid aqueous solution by mass percent according to the weight ratio of 1:1, stirring and mixing for 20-30min.
Example 3
A fluorite sorting method of a bayan obo iron-containing surrounding rock, which is characterized by comprising the following steps:
s1, crushing and screening tailings after iron separation of the baiyunebo iron-containing surrounding rock to obtain a mineral sample with the particle size smaller than 40mm.
S2, carrying out primary separation on the ore sample obtained in the step S1 by using a photoelectric intelligent separator to obtain fluorite rough concentrate and tailings with the particle size of 0-10 mm;
specifically, an intelligent photoelectric separator is used for scanning a part of raw ores to obtain ore data, and different waste throwing rates are set from low to high through an intelligent recognition algorithm until a preset concentrate index is obtained.
S3, grinding the fluorite rough concentrate obtained in the step S2 until the granularity is more than 95% of-200 meshes, and adding 0.2kg of flotation reagent/ton of fluorite rough concentrate for secondary flotation to obtain fluorite concentrate;
the weight percentage concentration of the ore pulp in the secondary flotation is 35%, the flotation temperature is 30-35 ℃, the pH value is 6.8-7.2, and the addition sequence of the flotation reagents is as follows: acidic water glass, sodium carbonate, sodium petroleum sulfonate, dodecyl amine and vegetable oil;
specifically, the mass ratio of the acid water glass to the sodium carbonate to the petroleum sodium sulfonate to the dodecyl amine to the vegetable oil is 4:2:2:3:0.3;
the vegetable oil is prepared from the following components in percentage by mass: 1 soybean oil and corn oil;
the preparation method of the acid water glass comprises the following steps: adding 6% sulfuric acid aqueous solution into the water glass solution with the mass percentage of 6% according to the weight ratio of 1:1, and stirring and mixing for 20-30min.
Comparative example 1
The difference between this comparative example and example 3 is that: the mass ratio of the acid sodium silicate to the sodium carbonate to the petroleum sodium sulfonate to the dodecyl amine to the vegetable oil in the flotation reagent is 4:4:4:1:0.8.
comparative example 2
The difference between this comparative example and example 3 is that: the mass ratio of the acid sodium silicate to the sodium carbonate to the petroleum sodium sulfonate to the dodecyl amine to the vegetable oil in the flotation reagent is 4:2:0.5:8:0.3.
comparative example 3
The difference between this comparative example and example 3 is that: sodium oleate is used for replacing dodecyl amine, and the second flotation oil is used for replacing vegetable oil.
In the embodiment and the comparative example, the grade of Fe in tailings after iron separation of the Bayan-obo iron-containing surrounding rock is 11.79 percent, and CaF 2 The resulting fluorite concentrate was subjected to chemical analysis after secondary flotation to a grade of 15.25%, and the results are shown in table 1 below.
Table 1 flotation results
As shown in Table 1, the fluorite content of the raw ore (tailings after iron separation of the Baiyunebo iron-containing surrounding rock) is 15.25%, the iron content is 11.79%, and after the fluorite separation method of the embodiment 1-3 is adopted, the fluorite concentrate grade is 95.88-97.18%, the second-level acid grade fluorite standard is reached, the yield is 10.80-10.91%, and the recovery rate is 31.11-31.56%; the fluorite separation method using comparative examples 1-3 cannot effectively improve the fluorite concentrate grade.
In conclusion, the fluorite separation method is utilized to separate tailings after the baiyunebo iron-containing surrounding rock is used for separating iron, and the fluorite concentrate grade can reach over 95 percent of secondary acid grade fluorite grade.
It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the invention includes, but is not limited to, the examples described in the detailed description, as other embodiments derived from the technical solutions of the invention by a person skilled in the art are equally within the scope of the invention.
Claims (1)
1. A fluorite sorting method of a bayan obo iron-containing surrounding rock, which is characterized by comprising the following steps:
s1, crushing and screening tailings after iron separation of the baiyunebo iron-containing surrounding rock to obtain a mineral sample with the particle size smaller than 40 mm;
s2, carrying out primary separation on the ore sample obtained in the step S1 by using a photoelectric intelligent separator to obtain fluorite rough concentrate and tailings with the particle size of 0-10 mm;
specifically, an intelligent photoelectric separator is used for scanning a part of raw ores to obtain ore data, and different waste throwing rates are set from low to high through an intelligent recognition algorithm until a preset concentrate index is obtained;
s3, grinding the fluorite rough concentrate obtained in the step S2 until the granularity is more than 95% of-200 meshes, and adding 0.2kg of flotation reagent/ton of fluorite rough concentrate for secondary flotation to obtain fluorite concentrate;
the weight percentage concentration of the ore pulp in the secondary flotation is 35%, the flotation temperature is 30-35 ℃, the pH value is 6.8-7.2, and the addition sequence of the flotation reagents is as follows: acidic water glass, sodium carbonate, sodium petroleum sulfonate, dodecyl amine and vegetable oil;
specifically, the mass ratio of the acid water glass to the sodium carbonate to the petroleum sodium sulfonate to the dodecyl amine to the vegetable oil is 4:2:2:3:0.3;
the vegetable oil is prepared from the following components in percentage by mass: 1 soybean oil and corn oil;
the preparation method of the acid water glass comprises the following steps: adding 6% sulfuric acid aqueous solution into the water glass solution with the mass percentage of 6% according to the weight ratio of 1:1, and stirring and mixing for 20-30min.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102294296A (en) * | 2011-06-30 | 2011-12-28 | 中蓝连海设计研究院 | Floatation and enrichment process for silicon-calcium mass type fluorite ores |
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| CN102886305B (en) * | 2012-10-19 | 2015-11-25 | 内蒙古科技大学 | A kind of Bayan Obo mine tailing selects scandium method |
| CN102886310B (en) * | 2012-10-19 | 2013-08-14 | 内蒙古科技大学 | Method for separating scandium concentrate from bayan obo tailings |
| CN103357508B (en) * | 2013-07-17 | 2015-02-18 | 内蒙古科技大学 | Method for flotation of fluorite in Baiyun obo tailing |
| CN103706485B (en) * | 2013-12-25 | 2016-02-24 | 昆明理工大学 | A kind of beneficiation method of high carbon acid calcium type fluorite ore |
| CN108654830B (en) * | 2018-04-28 | 2021-01-05 | 武汉科技大学 | Method for recycling fluorite and dolomite from dolomite magnetite magnetic separation tailings |
| CN110449255B (en) * | 2019-07-23 | 2021-06-18 | 中国地质科学院郑州矿产综合利用研究所 | Fluorite lean ore color separation upgrading-tailing discarding preselection method |
| CN111482264B (en) * | 2020-04-17 | 2021-12-28 | 包头稀土研究院 | Method for treating medium lean oxidized ore |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102294296A (en) * | 2011-06-30 | 2011-12-28 | 中蓝连海设计研究院 | Floatation and enrichment process for silicon-calcium mass type fluorite ores |
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