CN114700180B - Method for recycling rare earth components in waste polishing powder - Google Patents
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- CN114700180B CN114700180B CN202210279767.7A CN202210279767A CN114700180B CN 114700180 B CN114700180 B CN 114700180B CN 202210279767 A CN202210279767 A CN 202210279767A CN 114700180 B CN114700180 B CN 114700180B
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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- B03D2201/04—Frothers
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
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Abstract
According to the reason of failure of the polishing powder, the rare earth oxide is exposed through crushing and crushing processes, other pollutants on the surface of the rare earth oxide are further removed through oxalic acid cleaning, crystal faces of the rare earth oxide are exposed, and then the rare earth oxide is collected in a flotation process through an efficient collector, so that the recovery of the rare earth component is realized. The rare earth components in the waste polishing powder are separated as concentrate through the procedures of drying, dewatering, crushing, ore grinding, cleaning, floatation, dewatering, filtering, drying and the like, and can be used as the recycling of the polishing powder. Meanwhile, after the rare earth component is floated out, most of the remaining tailings are SiO 2 And Al 2 O 3 With the development of technology, the method can be used for synthesizing and manufacturing sodalite in future, and realizes tailing-free production.
Description
Technical Field
The invention belongs to the technical field of rare earth material recovery, and particularly relates to a method for recovering rare earth components in waste polishing powder.
Background
With the current increasing demands on the performance of the polishing products, the polishing technology and polishing materials are continuously being deeply and improved. In particular to a rare earth polishing powder polishing material used in the glass industry, wherein the rare earth oxide has the advantages of moderate hardness, strong cutting capability, short polishing time, high polishing precision, long service life, clean and environment-friendly operation environment and the like by virtue of the similar hardness and unique crystal structure of the rare earth oxide and glass. Therefore, the rare earth polishing powder is widely used in the polishing industry. The statistics shows that the yield of the rare earth polishing powder in 2016 years reaches 2.2 ten thousand tons, and the yield of the rare earth polishing powder is increased at a rate of 10-20% per year.
In the polishing process of polishing powder, the polishing powder is gradually invalidated under the combined action of physical grinding and chemical grinding, about 70% of the invalidated rare earth polishing powder is converted into waste rare earth polishing powder, and the waste rare earth polishing powder is enriched and accumulated to form industrial waste, and the main components of the waste rare earth polishing powder are rare earth compounds; organic matters such as precipitants, flocculating agents and the like; waste residues generated by the polished workpiece; polishing pad casts, etc.
With rare earth resources as mineral resources which are strategically developed in China, the economic value and social status of the rare earth resources are remarkably improved. The rare earth resources in China are limited, and a large amount of waste rare earth polishing powder is produced every year, so that the recycling of the rare earth polishing powder waste is increased. At present, the recycling range of polishing powder in China is small, and the method is limited in the research and development stage of a laboratory, and most of the methods are acid-base leaching combined roasting treatment. If the method is applied to actual industrial production, a large amount of acid and alkali have great potential safety hazards in production and use, and a large amount of waste gas and waste liquid can be generated to pollute the environment. Meanwhile, the high-temperature roasting has high energy consumption and generates a large amount of harmful gas. The methods have high cost and large harm, and are not suitable for recycling in actual industrialization.
Disclosure of Invention
The invention aims to provide a method for recycling rare earth components in waste polishing powder, which has the advantages of simple process, low cost and high grade of recycled products.
The method for recycling the rare earth component in the waste polishing powder comprises the following steps:
1) Collecting polished polishing powder waste residues, and then drying at a set temperature to obtain dried polishing powder waste residues;
2) Primary crushing is carried out on the dried polishing powder waste residue in the step 1), and after crushing, ore grinding is further carried out in ore grinding equipment to obtain the ground waste residue;
3) Placing the waste residue after ore grinding in the step 2) into oxalic acid solution for cleaning, and filtering after cleaning to obtain cleaned waste residue;
4) Placing the waste residue cleaned in the step 3) into a flotation tank, adding a flotation reagent, and adjusting a flotation process to perform flotation, wherein the obtained concentrate is the rare earth component.
In the step 1), the drying temperature is 80-90 ℃ and the drying time is 7-8 h.
In the step 2), the waste residues of the polishing powder are primarily crushed until the granularity of the waste residues of the polishing powder is 0.5-1.5 cm; grinding the ground ore until the granularity of the ground ore product is less than 0.038mm and more than 75%.
In the step 3), the solid-liquid ratio of the waste residue after ore grinding to the oxalic acid solution is 1 (1-3), and the mass concentration of the oxalic acid solution is 10-20%; the cleaning is stirring cleaning, and the cleaning time is 8-12 min.
In the step 4), a coarse, four fine and three-sweep flotation process is adopted for flotation; the flotation reagent comprises: pH adjusters, inhibitors, collectors, and foaming agents; the pH regulator is sulfuric acid, the inhibitor is sodium fluosilicate, the collector is a combined medicament consisting of (3-5): 0.5-1.5, and the foamer is No. 2 oil; the concentration of the ore pulp for floatation is 20-40%; the rotating speed during floatation is 1200-1600 r/min.
Preferably, the specific process of the flotation is as follows:
s1, adding a flotation reagent to perform roughing, and obtaining roughing concentrate and roughing tailings;
s2, scavenging the roughing tailings in the step S1 for 3 times.
S3: and (3) carrying out four times of concentration on the rough concentration concentrate in the step S1 to obtain concentrate containing rare earth components.
In the step S1, the roughing agent system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 1.8-2.2 kg/t, the addition amount of the collector to the raw ore is 1.8-2.2 kg/t, and the addition amount of the foaming agent to the raw ore is 0.1-0.3 kg/t.
In the step S2, the first scavenging and the second scavenging need to add the medicament, and the third scavenging does not add the medicament; the first scavenging medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 1.0-1.4 kg/t, the addition amount of the collector to the raw ore is 1.2-1.6 kg/t, and the addition amount of the foaming agent to the raw ore is 0.08-0.12 kg/t; the second scavenging medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 0.8-1.2 kg/t, the addition amount of the collector to the raw ore is 1.0-1.2 kg/t, and the addition amount of the foaming agent to the raw ore is 0.05-0.08 kg/t.
In the step S3, the medicines are required to be added in the first to third selection, the medicines are not required to be added in the fourth selection, and the medicine system of the first selection is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 1.4-1.8 kg/t, the addition amount of the collector to the raw ore is 1.6-2.0 kg/t, and the addition amount of the foaming agent to the raw ore is 0.1-0.2 kg/t; the second carefully chosen medicament regimen is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 1.0-1.4 kg/t, the addition amount of the collector to the raw ore is 1.2-1.5 kg/t, and the addition amount of the foaming agent to the raw ore is 0.09-0.12 kg/t; the third carefully chosen medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 0.8-1.0 kg/t, the addition amount of the collector to the raw ore is 1.0-1.2 kg/t, and the addition amount of the foaming agent to the raw ore is 0.05-0.08 kg/t.
In the steps S2 and S3, the crude middling product obtained in the scavenging process is returned to the previous stage flotation to be used as a feed; the concentrate product obtained in the beneficiation process is returned to the last stage of flotation as feed.
The tailings produced by the flotation process can be used as a raw material for preparing sodalite.
The principle of the invention is as follows: the invention focuses on the search for optimal selection of agents and the mechanism of action of agents. According to the failure reason of the polishing powder, impurity particles generated in the polishing process can be accumulated on the surface of the rare earth oxide, so that Si-OH is coated on CeO 2 Particle surface, and surface Ce 3+ Forming Ce-O-Si. Meanwhile, other additives are polluted in the polishing process, so that the raw waste material after ore grinding is cleaned by oxalic acid, and the purpose is to clean the pollutants coated on rare earth oxide, expose the crystal surfaces of cerium oxide and lanthanum oxide and enable flotation agents to be better selected and collected; benzohydroxamic acid, sodium oleate, cocoamine and betaine according to the following formulaThe combination is used as a collecting combination medicament, and has good effect on recycling rare earth from waste residues of polishing powder. The benzohydroxamic acid forms five-membered chelate rings with metal ions on the surface of minerals through O atoms on carbonyl groups and O atoms on N, and generates characteristic adsorption on the surface of rare earth oxide, so that the selectivity is better; sodium oleate is used as a fatty acid collector, has a longer carbon chain, good hydrophobicity, is beneficial to the froth flotation of rare earth, and has strong capability of collecting rare earth elements; the cocoamine and the betaine have excellent emulsifying, dispersing and solubilizing effects. In particular, betaine, which is an amphoteric surfactant, has a high foaming property in addition to the above-mentioned effects, and is useful as a foaming agent or foam stabilizer. When the modified starch is compounded with an anionic surfactant, strong interaction is generated between molecules, and the foam-increasing and viscosity-increasing effects are obviously improved.
The invention has the beneficial effects that: according to the method, according to the failure cause of polishing powder, the rare earth oxide is exposed through crushing and crushing processes, other pollutants on the surface of the rare earth oxide are further removed through oxalic acid cleaning, crystal faces of the rare earth oxide are exposed, and then the rare earth oxide is collected in a flotation process through an efficient collector, so that the recovery of rare earth components is realized. The rare earth components in the waste polishing powder are separated as concentrate through the procedures of drying, dewatering, crushing, ore grinding, cleaning, floatation, dewatering, filtering, drying and the like, and can be used as the recycling of the polishing powder. Meanwhile, after the rare earth component is floated out, most of the remaining tailings are SiO 2 And Al 2 O 3 With the development of technology, the method can be used for synthesizing and manufacturing sodalite in future, and realizes tailing-free production. The method fully recycles the waste polishing powder waste, greatly saves rare earth resources, reduces recycling cost, simultaneously has low harm to the environment in the whole production process, effectively solves the problem of treating the polishing powder waste in the prior industry, and achieves the sustainable healthy development ambitious goal advocated by China.
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FIG. 1 is a specific process flow diagram of example 1.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention more apparent, the following detailed description will be provided with reference to specific embodiments, but the scope of the present invention is not limited to the following specific embodiments.
Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present invention.
Unless otherwise specifically indicated, various raw materials, reagents, instruments, equipment, etc. used in the present invention are commercially available.
Example 1
The raw materials used in this example were obtained from Changsha blue Cisco technology Co., ltd, and the polished and ground production waste was taken. Wherein the grade of cerium oxide is 46.64%, the grade of lanthanum oxide is 13.55%, and other main impurities are SiO 2 And Al 2 O 3 The grades are 15.67% and 11.99% respectively. The process is shown in fig. 1, and specifically comprises the following steps:
the collected original waste polishing powder is baked at 80 ℃ for 8 hours and then is completely dehydrated and is broken. Crushing the waste materials to 0.5-1.5 cm by a crusher, grinding the waste materials by using a vibration mill, and controlling conditions so that the granularity of the ground products is less than 0.038mm and accounts for more than 75%. And then placing the ground waste residue into a stirrer, adding oxalic acid with the mass concentration of 15% according to the solid-to-liquid ratio of 1g to 2mL, stirring and cleaning for 10 minutes under the condition of the rotating speed of 400-500 r/min. After oxalic acid is cleaned and stirred, the oxalic acid is dehydrated and filtered, and then cleaned waste is put into a flotation machine to start flotation.
The flotation adopts a closed flotation process of one coarse, four fine and three sweeps, the slurry concentration is controlled at 30% by controlling the feeding speed and adjusting the water adding amount, and the rotating speed is controlled at 1500r/min during flotation. Adding sulfuric acid solution to adjust pH=3.0, sequentially adding inhibitor sodium fluosilicate (2 kg/t relative to the addition amount of raw ore), and inhibiting SiO 2 And Al 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the Adding the benzohydroxamic acid, sodium oleate and the sodium oleate which are combined according to the mass ratio of 4:4:1:1 into the mixture,The combination of cocoamine and betaine (the addition amount of the cocoamine and betaine relative to the raw ore is 2 kg/t) is used for collecting rare earth oxide (CeO) 2 、La 2 O 3 、CeOF 2 LaOF); and then adding a foaming agent 2# to foam (the addition amount of the foaming agent is 0.2kg/t relative to the raw ore), and starting roughing after aerating to obtain rough concentrate and rough tailings.
The method comprises the steps of (1) carrying out scavenging on coarse tailings for 3 times, sequentially returning scavenging coarse middlings to the previous stage of floatation to serve as feeding, adding a medicament for each scavenging and the second scavenging, and adding no medicament for the third scavenging; the first scavenging medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3.0; the addition amount of the inhibitor to the raw ore is 1.2kg/t, the addition amount of the collector to the raw ore is 1.5kg/t, and the addition amount of the foaming agent to the raw ore is 0.1kg/t; the second scavenging medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3; the addition amount of the inhibitor to the raw ore was 1.0kg/t, the addition amount of the collector to the raw ore was 1.2g/t, and the addition amount of the foaming agent to the raw ore was 0.08kg/t.
The rough concentrate is subjected to four times of concentration, the concentrate selected each time is used as the feed for the next concentration, the concentrated middling is returned to the previous stage of flotation, the medicaments are required to be added for the first to third times of concentration, the medicaments are not required to be added for the fourth time of concentration, and the medicament system for the first time of concentration is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3.0; the addition amount of the inhibitor to the raw ore is 1.6kg/t, the addition amount of the collector to the raw ore is 1.8kg/t, and the addition amount of the foaming agent to the raw ore is 0.15kg/t; the second carefully chosen medicament regimen is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3.0; the addition amount of the inhibitor to the raw ore is 1.2kg/t, the addition amount of the collector to the raw ore is 1.5kg/t, and the addition amount of the foaming agent to the raw ore is 0.1kg/t; the third carefully chosen medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3.0; the addition amount of the inhibitor to the raw ore was 1.0kg/t, the addition amount of the collector to the raw ore was 1.2kg/t, and the addition amount of the foaming agent to the raw ore was 0.08kg/t. Finally, the rare earth component concentrate is obtained.
The content of rare earth components in the concentrate is detected, and the total grade of cerium oxide and lanthanum oxide is 90%. Meanwhile, the recovery rate of the rare earth component is calculated to be higher than 70%, which shows that the recovery of the waste polishing powder by adopting a flotation method is a feasible and effective means.
Example 2
The raw materials used in this example were obtained from Changsha blue Cisco technology Co., ltd, and the polished and ground production waste was taken. Wherein the grade of cerium oxide is 42.35%, the grade of lanthanum oxide is 15.56%, and other main impurities are SiO 2 And Al 2 O 3 The grades are 17.54% and 13.87%, respectively.
The collected original waste polishing powder is baked at 80 ℃ for 8 hours and then is completely dehydrated and is broken. Crushing the waste materials to 0.5-1.5 cm by a crusher, grinding the waste materials by using a vibration mill, and controlling conditions so that the granularity of the ground products is less than 0.038mm and accounts for more than 75%. And then placing the ground waste residue into a stirrer, adding oxalic acid with the mass concentration of 15% according to the solid-to-liquid ratio of 1g to 3mL, stirring and cleaning for 8 minutes under the condition of the rotating speed of 400-500 r/min. After oxalic acid is cleaned and stirred, the oxalic acid is dehydrated and filtered, and then cleaned waste is put into a flotation machine to start flotation.
The flotation adopts a closed flotation process of one coarse, four fine and three sweeps, the slurry concentration is controlled at 25% by controlling the feeding speed and adjusting the water adding amount, and the rotating speed is controlled at 1600r/min during flotation. Adding sulfuric acid solution to adjust pH=3.5, sequentially adding inhibitor sodium fluosilicate (2.2 kg/t relative to the addition amount of raw ore), and inhibiting SiO 2 And Al 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the Adding a combination of benzoic hydroxamic acid, sodium oleate, cocoamine and betaine (the addition amount of the sodium oleate is 2.2kg/t relative to the raw ore) with the mass ratio of the combined collector of 3:5:1.5:1.5:1.5, and collecting rare earth oxide (CeO) 2 、La 2 O 3 、CeOF 2 LaOF); and then adding a foaming agent 2# to foam (the addition amount of the foaming agent is 0.1kg/t relative to the raw ore), and starting roughing after aerating to obtain rough concentrate and rough tailings.
The method comprises the steps of (1) carrying out scavenging on coarse tailings for 3 times, sequentially returning scavenging coarse middlings to the previous stage of floatation to serve as feeding, adding a medicament for each scavenging and the second scavenging, and adding no medicament for the third scavenging; the first scavenging medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3.5; the addition amount of the inhibitor to the raw ore is 1.0kg/t, the addition amount of the collector to the raw ore is 1.2kg/t, and the addition amount of the foaming agent to the raw ore is 0.08kg/t; the second scavenging medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3.5; the addition amount of the inhibitor to the raw ore was 0.8kg/t, the addition amount of the collector to the raw ore was 1.0g/t, and the addition amount of the foaming agent to the raw ore was 0.06kg/t.
The rough concentrate is subjected to four times of concentration, the concentrate selected each time is used as the feed for the next concentration, the concentrated middling is returned to the previous stage of flotation, the medicaments are required to be added for the first to third times of concentration, the medicaments are not required to be added for the fourth time of concentration, and the medicament system for the first time of concentration is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3.5; the addition amount of the inhibitor to the raw ore is 1.4kg/t, the addition amount of the collector to the raw ore is 1.6kg/t, and the addition amount of the foaming agent to the raw ore is 0.1kg/t; the second carefully chosen medicament regimen is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3.5; the addition amount of the inhibitor to the raw ore is 1.0kg/t, the addition amount of the collector to the raw ore is 1.2kg/t, and the addition amount of the foaming agent to the raw ore is 0.09kg/t; the third carefully chosen medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 3.5; the addition amount of the inhibitor to the raw ore is 0.8kg/t, the addition amount of the collector to the raw ore is 1.0kg/t, and the addition amount of the foaming agent to the raw ore is 0.05 kg/t. Finally, the rare earth component concentrate is obtained.
The content of rare earth components in the concentrate is detected, and the total grade of cerium oxide and lanthanum oxide is 88.79%. Meanwhile, the recovery rate of the rare earth component is calculated to be higher than 72%, which shows that the recovery of the waste polishing powder by adopting a flotation method is a feasible and effective means.
The above examples are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the technical scope of the present invention, should make equivalents and modifications according to the technical scheme of the present invention and the concept thereof, and should be covered by the scope of the present invention.
Claims (8)
1. A method for recovering rare earth components in waste polishing powder, comprising the following steps:
1) Collecting polished polishing powder waste residues, and then drying at a set temperature to obtain dried polishing powder waste residues;
2) Primary crushing is carried out on the dried polishing powder waste residue in the step 1), and after crushing, crushing is further carried out in ore grinding equipment, so as to obtain the ground waste residue;
3) Placing the waste residue after ore grinding in the step 2) into oxalic acid solution for cleaning, and filtering after cleaning to obtain cleaned waste residue;
4) Placing the waste residue cleaned in the step 3) into a flotation tank, adding a flotation reagent, and adjusting a flotation process to perform flotation, wherein the obtained concentrate is the rare earth component;
in the step 3), the solid-liquid ratio of the waste residue after ore grinding to the oxalic acid solution is 1 (1-3), and the mass concentration of the oxalic acid solution is 10-20%; the cleaning is stirring cleaning, and the cleaning time is 8-12 min;
in the step 4), a coarse, four fine and three-sweep flotation process is adopted for flotation; the flotation reagent comprises: pH adjusters, inhibitors, collectors, and foaming agents; the pH regulator is sulfuric acid, the inhibitor is sodium fluosilicate, the collector is a combined medicament consisting of (3-5): 0.5-1.5 by mass ratio of benzoic hydroxamic acid, sodium oleate, cocoamine and betaine, and the foaming agent is No. 2 oil; the concentration of the ore pulp in flotation is 20-40%; the rotating speed during floatation is 1200-160 r/min.
2. The method for recycling rare earth components in waste polishing powder according to claim 1, wherein in the step 1), the drying temperature is 80-90 ℃ and the drying time is 7-8 hours.
3. The method for recycling rare earth components in waste polishing powder according to claim 1, wherein in the step 2), primary crushing is performed until the granularity of the waste polishing powder residue is 0.5-1.5 cm; grinding the ground ore until the granularity of the ground ore product is less than 0.038mm and more than 75%.
4. The method for recycling rare earth components in waste polishing powder according to claim 1, wherein the specific process of flotation is as follows:
s1, adding a flotation reagent to perform roughing, and obtaining roughing concentrate and roughing tailings;
s2, scavenging the roughing tailings in the step S1 for 3 times;
and S3, carrying out four times of concentration on the rough concentration concentrate in the step S1 to obtain concentrate containing rare earth components.
5. The method for recycling rare earth components in waste polishing powder as set forth in claim 4, wherein in the step S1, the roughing agent regimen is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 1.8-2.2 kg/t, the addition amount of the collector to the raw ore is 1.8-2.2 kg/t, and the addition amount of the foaming agent to the raw ore is 0.15-0.25 kg/t.
6. The method for recycling rare earth components in waste polishing powder as recited in claim 4, wherein in the step S2, the first and second sweeps require addition of a chemical agent, and the third does not require addition of a chemical agent; the first scavenging medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 1.0-1.4 kg/t, the addition amount of the collector to the raw ore is 1.2-1.6 kg/t, and the addition amount of the foaming agent to the raw ore is 0.08-0.1 kg/t; the second scavenging medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 0.8-1.0 kg/t, the addition amount of the collector to the raw ore is 1.0-1.2 kg/t, and the addition amount of the foaming agent to the raw ore is 0.05-0.08 kg/t.
7. The method for recycling rare earth components in waste polishing powder as set forth in claim 4, wherein in the step S3, the chemicals are added for the first to third time of concentration, the chemicals are not added for the fourth time of concentration, and the chemical system of the first time of concentration is: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 1.4-1.8 kg/t, the addition amount of the collector to the raw ore is 1.6-2.0 kg/t, and the addition amount of the foaming agent to the raw ore is 0.1-0.2 kg/t; the second carefully chosen medicament regimen is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 1.0-1.4 kg/t, the addition amount of the collector to the raw ore is 1.2-1.5 kg/t, and the addition amount of the foaming agent to the raw ore is 0.09-0.12 kg/t; the third carefully chosen medicament system is as follows: adding a pH regulator to regulate the pH value of the ore pulp to 2.5-3.5; the addition amount of the inhibitor to the raw ore is 0.8-1.0 kg/t, the addition amount of the collector to the raw ore is 1.0-1.2 kg/t, and the addition amount of the foaming agent to the raw ore is 0.05-0.08 kg/t.
8. The method for recycling rare earth components in waste polishing powder as set forth in claim 4, wherein in steps S2 and S3, the crude middling product obtained in the scavenging process is returned to the upper stage flotation as a feed; the concentrate product obtained in the beneficiation process is returned to the last stage of flotation as feed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210279767.7A CN114700180B (en) | 2022-03-21 | 2022-03-21 | Method for recycling rare earth components in waste polishing powder |
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| CN104087757A (en) * | 2014-07-12 | 2014-10-08 | 连云港健发磁性材料有限公司 | Simplified method for recovering rare earth elements from waste residues of rare earth polishing powder |
| KR101766788B1 (en) * | 2017-01-12 | 2017-08-11 | 대한민국 | Method of Separating Rare Earth Elements From Rare Earth Polishing Power Wastes |
| GB201809818D0 (en) * | 2018-06-15 | 2018-08-01 | Seren Tech Limited | Countercurrent rare earth separation process |
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| CN102319631B (en) * | 2011-07-28 | 2012-11-14 | 内蒙古科技大学 | Method for flotation of rare earth from Baiyunebo tailings |
| CN102886308B (en) * | 2012-10-15 | 2013-09-25 | 内蒙古科技大学 | Method for recycling waste rare-earth polishing powder |
| CN102886312A (en) * | 2012-10-15 | 2013-01-23 | 内蒙古科技大学 | Mineral sorting method for separating bastnaesite and monazite from high-grade mixed rare-earth concentrate |
| CN106563561A (en) * | 2016-08-31 | 2017-04-19 | 李梅 | Method of improving rare earth grade of hybrid rare earth ores |
| CN108359408A (en) * | 2017-01-26 | 2018-08-03 | 新岛世纪（北京）新型材料技术有限公司 | A method of recycling polishing powder from polishing powder from rare earth waste residue |
| CN114107668B (en) * | 2021-11-10 | 2023-11-17 | 北京工业大学 | Method for mechanically activating, reinforcing and leaching rare earth in waste polishing solution |
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| CN104087757A (en) * | 2014-07-12 | 2014-10-08 | 连云港健发磁性材料有限公司 | Simplified method for recovering rare earth elements from waste residues of rare earth polishing powder |
| KR101766788B1 (en) * | 2017-01-12 | 2017-08-11 | 대한민국 | Method of Separating Rare Earth Elements From Rare Earth Polishing Power Wastes |
| GB201809818D0 (en) * | 2018-06-15 | 2018-08-01 | Seren Tech Limited | Countercurrent rare earth separation process |
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