CN103263977A - Process for recovering iron and rare earth in baotite low-intensity magnetic separation tailings - Google Patents
Process for recovering iron and rare earth in baotite low-intensity magnetic separation tailings Download PDFInfo
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Abstract
The invention belongs to the technical field of mineral engineering and aims at providing a process for recovering iron and rare earth in baotite low-intensity magnetic separation tailings. Iron content in the tailings in the existing technological process of a bayan obo iron mine is about 13% ordinarily, dissemination particles of iron minerals are fine, and the recovering difficulty of the iron minerals in the tailings is caused. The rare earth content is 7%-8% ordinarily, so that the rare earth resource recovering value exists. Rare earth concentrate is obtained from the low-intensity magnetic separation tailings in the existing technological process by adopting a rare earth separation process including primary roughing and a tertiary roughing. Rare earth tailings and middlings 1 in the rare earth recovering process serve as raw materials for recovering the iron minerals, and the raw materials are mixed and grinded to be 96-97% of -325 meshes and then are subjected to magnetic separation at the magnetic field intensity of 600-650kA/m. Magnetic separation rough concentrate serves as iron flotation feeds, ammonium fluosilicate is used as an inhibitor and a potential of hydrogen (pH) regulator, and oxidized paraffin soap and alkyl hydroximic acid with the mass ratio of 8-10:1 serve as collecting agents to perform direct iron flotation to obtain iron ore concentrate.
Description
Technical field
The invention belongs to the mineral engineering field, be specifically related to the recovery technology of iron and rare earth in a kind of baotite low intensity magnetic separation mine tailing.
Background technology
Baiyunebo iron mine now adopts low intensity magnetic separation-reverse flotation ore-dressing technique to reclaim the magnetic iron ore mineral.The low intensity magnetic separation mine tailing iron content that produces in the technical process is generally about 13%, iron mineral disseminated grain size wherein is very thin, and with contain the tight symbiosis of gangue mineral such as ferrosilicate, carbonate, cause the secondary recovery difficulty of iron mineral in the mine tailing bigger, reclaim at present always.Content of rare earth is higher, generally between 7%～8%, has only reclaimed the rare-earth mineral in the overflow by graded operation at present, and directly enters the mine tailing storehouse for the more coarsely graded rare-earth mineral of major part owing to recovery difficult great thing mine tailing.This mine tailing produces 3,560,000 tons every year approximately, is rare earth resources and the secondary iron ore deposit that has recovery value.Therefore, reclaim the technology of iron mineral and rare-earth mineral in the exploitation low intensity magnetic separation mine tailing, particulate iron mineral in the mine tailing is carried out secondary recovery, simultaneously more coarsely graded rare-earth mineral is recycled, to the comprehensive utilization ratio that improves mineral resources with utilize level to have great importance.
Summary of the invention
The recovery technology that the purpose of this invention is to provide iron and rare earth in a kind of baotite low intensity magnetic separation mine tailing.
Purpose of the present invention realizes as follows.
1, the processing of raw material
To show in the technical process weakly magnetic tailings through air dry, pulverize, mix.
2, the recovery technology of rare earth
With above-mentioned raw materials as the rare earth flotation feed, composite collecting agent with the bigcatkin willow hydroximic acid of mass ratio 6-9:1 and alkyl hydroximic acid is that collecting agent, waterglass serve as to adjust agent, be that 4.8-5.2kg/t, collector dosage are to carry out one roughing under the condition of 3.2-3.8kg/t at slurry temperature 40-50 ℃, pH value 9-9.5, waterglass consumption, obtain rare earth rough concentrate and rare-earth tailing; Under slurry temperature 40-50 ℃, the condition of pH value 9-9.5, collector dosage 0.6-0.8kg/t, waterglass consumption 1.0-1.2kg/t, the rare earth rough concentrate is carried out primary cleaning, obtain concentrate 1 and chats 1; Under slurry temperature 40-50 ℃, the condition of pH value 8.5-9, collector dosage 0-0.2kg/t, waterglass consumption 0.2-0.4kg/t, rare earth ore concentrate 1 is carried out recleaning, obtain concentrate 2 and chats 2; Under slurry temperature 40-50 ℃, the condition of pH value 8.5-9, waterglass consumption 0.1-0.2kg/t, rare earth ore concentrate 2 is carried out triple cleaning, obtain final rare earth ore concentrate and chats 3.Adopt the collecting agent of high selectivity and the easily medicament of row combination rationally, under preferable flotation conditions, rare earth sorting process by one roughing, triple cleaning, realized effective recovery of more coarsely graded rare-earth mineral in the low intensity magnetic separation mine tailing, final from the mine tailing that contains rare earth 7-8%, obtain the rare earth grade greater than 50%, the rate of recovery is greater than 70% rare earth ore concentrate.
3, the recovery technology of iron
With the rare-earth tailing in the recovery technology of above-mentioned rare earth and chats 1 as the raw material that reclaims iron mineral,-325 order 96-97% are arrived in two kinds of raw material mixing fine grindings, under the condition of magnetic field intensity 600-650 kA/m, carry out magnetic separation, obtain magnetic separation iron rough concentrate and magnetic tailing; Adjusting agent, the oxidized paraffin wax soap of mass ratio 8-10:1 and the composite collecting agent of alkyl hydroximic acid with ammonium fluosilicate as the inhibitor of iron flotation and pH is the collecting agent of iron mineral, be that 2.2-2.8kg/t, collector dosage are under the condition of 0.8-1.2kg/t the magnetic separation rough concentrate to be carried out iron direct flotation one roughing at slurry temperature 30-35 ℃, pH value 5-6, ammonium fluosilicate consumption, obtain roughly selecting iron ore concentrate and rougher tailings; Be that 0.4-0.6kg/t, collector dosage are will roughly select iron ore concentrate under the condition of 0.1-0.2kg/t to carry out primary cleaning at slurry temperature 30-35 ℃, pH value 5-6, ammonium fluosilicate consumption, obtain iron ore concentrate 1 and chats 1; Be under the condition of 0.1-0.2kg/t iron ore concentrate 1 to be carried out recleaning at slurry temperature 30-35 ℃, pH value 5-6, ammonium fluosilicate consumption, obtain final iron ore concentrate and chats 2.By reclaiming the further fine grinding of iron mineral raw material, make most of iron mineral obtain monomer dissociation, for the secondary recovery of iron mineral has been created condition.Adopt the iron sorting process of magnetic separation, one roughing, recleaning, can be from the mine tailing of iron content 13-15%, obtain the iron grade greater than 62%, the rate of recovery is greater than 20% iron ore concentrate.
Effect: present technique at first adopts the rare earth flotation sorting process of one roughing, triple cleaning to reclaim rare-earth mineral, by collecting agent and the easily medicament of the row combination rationally of adopting high selectivity, under preferable flotation conditions, obtained the rare earth ore concentrate of high-recovery and grade; Rare earth is reclaimed rare-earth tailing in the technology and chats 1 as the raw material that reclaims iron mineral, by further fine grinding, make most of iron mineral obtain monomer dissociation, through magnetic separation, the grade of magnetic separation iron rough concentrate is improved greatly, created condition for next step direct flotation selects iron; Adopt simple, rationally, high selectivity select iron floating agent system, obtained than the high-grade iron ore concentrate, realized the secondary recovery of the iron mineral of iron grade 13-15%.Solved the problem that from baotite low intensity magnetic separation mine tailing, reclaims iron and rare earth simultaneously.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
The present invention will be further described with instantiation below.
The recovery technology of iron and rare earth in a kind of baotite low intensity magnetic separation mine tailing mainly comprises following components:
1, will show in the technical process low intensity magnetic separation mine tailing through air dry, pulverize, mix.
2, with above-mentioned raw materials as the rare earth flotation feed, at first slurry temperature is controlled at 44-46 ℃, add water glass 5.0kg/t then, adjusting the pH value is 9-9.5, add again with the bigcatkin willow hydroximic acid of mass ratio 7.5:1 and the composite collecting agent 3.5kg/t of alkyl hydroximic acid, under preferable flotation conditions, carry out rare earth and roughly select, obtain rare earth rough concentrate and rare-earth tailing; The slurry temperature of rare earth rough concentrate is adjusted to 44-46 ℃, add water glass 1.1kg/t then, adjusting the pH value is 9-9.5, add again with the bigcatkin willow hydroximic acid of mass ratio 7.5:1 and the composite collecting agent 0.7kg/t of alkyl hydroximic acid, under preferable flotation conditions, carry out the rare earth primary cleaning, obtain concentrate 1 and chats 1; The slurry temperature of concentrate 1 is adjusted to 44-46 ℃, add water glass 0.34kg/t then, adjusting the pH value is 8.5-9, add again with the bigcatkin willow hydroximic acid of mass ratio 7.5:1 and the composite collecting agent 0.05kg/t of alkyl hydroximic acid, under preferable flotation conditions, carry out the rare earth recleaning, obtain concentrate 2 and chats 2; The slurry temperature of concentrate 1 is adjusted to 44-46 ℃, add water glass 0.12kg/t then, adjusting the pH value is 8.5-9, carries out the rare earth triple cleaning under preferable flotation conditions, obtains final rare earth ore concentrate and chats 3.
3, return rare earth after chats 2 and chats 3 mix and roughly select operation, the raw material that rare earth rougher tailings and chats 1 sort as iron.
4, sort rare earth by one roughing, triple cleaning floatation process after, can be from the mine tailing that contains rare earth 7.25%, obtain the rare earth ore concentrate of rare earth grade 52.90%, the rate of recovery 71.39%.
5, with the rare-earth tailing in the recovery technology of above-mentioned rare earth and chats 1 as the raw material that reclaims iron mineral ,-325 orders 96.5% are arrived in two kinds of raw material mixings fine grindings, when magnetic field intensity is 636.8 kA/m, carry out magnetic separation then and obtain magnetic separation rough concentrate and magnetic tailing.
6, give the ore deposit with the magnetic separation rough concentrate as the iron flotation, adjusting slurry temperature is 30-35 ℃, add ammonium fluosilicate 2.5kg/t then, adjusting the pH value is 5-6, the oxidized paraffin wax soap and the alkyl hydroximic acid 1.4kg/t that add mass ratio 8.5:1 again carry out iron direct flotation one roughing, obtain roughly selecting iron ore concentrate and rougher tailings; The slurry temperature that iron ore concentrate is roughly selected in control is 30-35 ℃, add ammonium fluosilicate 0.5kg/t then, adjusting the pH value is 5-6, adds the oxidized paraffin wax soap of mass ratio 8.5:1 and alkyl hydroximic acid 0.12kg/t again and will roughly select iron ore concentrate and carry out primary cleaning, obtains iron ore concentrate 1 and chats 1; The slurry temperature of control iron ore concentrate 1 is 30-35 ℃, adds ammonium fluosilicate 0.15kg/t then, and adjusting the pH value is 5-6, and iron ore concentrate 1 is carried out recleaning, obtains final iron ore concentrate and chats 2.
7, chats 1 and chats 2 are back to iron flotation one roughing operation and primary cleaning operation successively, and rougher tailings is as true tailings.
8, after the technology by ore grinding, magnetic separation, one roughing, recleaning sorts iron mineral, can from being 13.10% mixing mine tailing, iron content obtain the iron ore concentrate of productive rate 4.70%, iron grade 63.22%, the rate of recovery 22.67%.
The above is best mode for carrying out the invention, and technological process of the present invention and parameter all are contained in the patent claim of the present invention.
Claims (1)
1. the recovery technology of iron and rare earth in the baotite low intensity magnetic separation mine tailing, it is characterized in that, adopt flotation-magnetic separation-floatation process, namely at first obtain rare earth ore concentrate by flotation, rare-earth tailing and chats obtain to give the ore deposit than the iron flotation of high-grade by strong magnetic operation, select iron to obtain iron ore concentrate through direct flotation again:
1) rare earth reclaims technology: adopt the rare earth sorting process of one roughing, triple cleaning, step is as follows:
A. roughly select: be rare earth catching agent with the bigcatkin willow hydroximic acid of mass ratio 6-9:1 and the composite collecting agent of alkyl hydroximic acid, waterglass is that ore pulp is adjusted agent, be that 4.8-5.2kg/t, collector dosage are to carry out one roughing under 3.2-3.8kg/t, slurry temperature 40-50 ℃, the condition of pH value 9-9.5 at the waterglass consumption, obtain rare earth rough concentrate and rare-earth tailing;
B. primary cleaning: under collector dosage 0.6-0.8kg/t, waterglass consumption 1.0-1.2kg/t, slurry temperature 40-50 ℃, the condition of pH value 9-9.5, the rare earth rough concentrate is carried out primary cleaning, obtain concentrate 1 and chats 1;
C. recleaning: under collector dosage 0-0.2kg/t, waterglass consumption 0.2-0.4kg/t, slurry temperature 40-50 ℃, the condition of pH value 8.5-9, rare earth ore concentrate 1 is carried out recleaning, obtain concentrate 2 and chats 2;
D. triple cleaning: under waterglass consumption 0.1-0.2kg/t, slurry temperature 40-50 ℃, the condition of pH value 8.5-9, rare earth ore concentrate 2 is carried out triple cleaning, obtain final rare earth ore concentrate and chats 3;
E. return rare earth after chats 2 and chats 3 mix and roughly select operation, the raw material that rare earth rougher tailings and chats 1 sort as iron;
2) iron reclaims technology: adopt the iron sorting process of ore grinding-magnetic separation-flotation, step is as follows:
A. magnetic separation: reclaim rare-earth tailing in the technology and chats 1 as the raw material of recovery iron mineral with rare earth,-325 order 96-97% are arrived in two kinds of raw material mixing fine grindings, when magnetic field intensity is 600-650 kA/m, carry out magnetic separation then, obtain magnetic separation iron rough concentrate and magnetic tailing;
B. roughly select: adjusting agent, the oxidized paraffin wax soap of mass ratio 8-10:1 and the composite collecting agent of alkyl hydroximic acid with ammonium fluosilicate as the inhibitor of iron flotation and pH is the collecting agent of iron mineral, be that 2.2-2.8kg/t, collector dosage are under the condition of 0.8-1.2kg/t the magnetic separation rough concentrate to be carried out iron direct flotation one roughing at slurry temperature 30-35 ℃, pH value 5-6, ammonium fluosilicate consumption, obtain roughly selecting iron ore concentrate and rougher tailings;
C. primary cleaning: be that 0.4-0.6kg/t, collector dosage are will roughly select iron ore concentrate under the condition of 0.1-0.2kg/t to carry out primary cleaning at slurry temperature 30-35 ℃, pH value 5-6, ammonium fluosilicate consumption, obtain iron ore concentrate 1 and chats 1;
D. recleaning: be under the condition of 0.1-0.2kg/t iron ore concentrate 1 to be carried out recleaning at slurry temperature 30-35 ℃, pH value 5-6, ammonium fluosilicate consumption, obtain final iron ore concentrate and chats 2;
E. chats 1 and chats 2 are back to iron flotation one roughing operation and primary cleaning operation successively, and rougher tailings is as true tailings.
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Cited By (7)
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| CN104475236A (en) * | 2014-12-04 | 2015-04-01 | 长沙矿冶研究院有限责任公司 | Combined beneficiation method for treating micro-fine grain disseminated iron ores |
| CN105107598A (en) * | 2015-08-31 | 2015-12-02 | 中南大学 | Method for preparing dense-medium fine powder through titaniferous magnetite with iron and titanium coexisting tightly |
| CN105597937A (en) * | 2015-08-31 | 2016-05-25 | 李梅 | Method for improving rare earth grade of low-grade rare earth ore |
| CN105597936A (en) * | 2015-08-31 | 2016-05-25 | 李梅 | Method for selecting high-grade rare-earth concentrates step by step |
| CN108246513A (en) * | 2018-01-25 | 2018-07-06 | 包头钢铁（集团）有限责任公司 | The process of iron direct flotation in a kind of oxide ore tailing |
| CN108580031A (en) * | 2018-07-19 | 2018-09-28 | 东北大学 | A kind of beneficiation method that more metal association iron selection tailings are roasted in advance |
| CN109821523A (en) * | 2019-01-23 | 2019-05-31 | 内蒙古科技大学 | A kind of preparation method and applications of rare-earth tailing base SCR catalyst |
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| CN104984824B (en) * | 2015-06-03 | 2018-02-09 | 张天昊 | A kind of method for grinding magnetic separation |
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| CN105597936A (en) * | 2015-08-31 | 2016-05-25 | 李梅 | Method for selecting high-grade rare-earth concentrates step by step |
| CN108246513A (en) * | 2018-01-25 | 2018-07-06 | 包头钢铁（集团）有限责任公司 | The process of iron direct flotation in a kind of oxide ore tailing |
| CN108580031A (en) * | 2018-07-19 | 2018-09-28 | 东北大学 | A kind of beneficiation method that more metal association iron selection tailings are roasted in advance |
| CN108580031B (en) * | 2018-07-19 | 2020-03-13 | 东北大学 | Mineral separation method for pre-roasting polymetallic associated iron tailings |
| CN109821523A (en) * | 2019-01-23 | 2019-05-31 | 内蒙古科技大学 | A kind of preparation method and applications of rare-earth tailing base SCR catalyst |
| CN109821523B (en) * | 2019-01-23 | 2021-10-08 | 内蒙古科技大学 | Preparation method and application of rare earth tailing-based SCR catalyst |
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Inventor after: Ji Junmei Inventor after: Li Chunlong Inventor after: Ou Junying Inventor after: Hou Wei Inventor after: Jiang Feng Inventor after: Lv Xiaoyan Inventor before: Ji Junmei Inventor before: Ou Junying Inventor before: Hou Wei Inventor before: Jiang Feng Inventor before: Lv Xiaoyan |
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