CN109453892B - Method for efficiently utilizing stone sawing mud containing tin and iron - Google Patents
Method for efficiently utilizing stone sawing mud containing tin and iron Download PDFInfo
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- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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Abstract
The invention provides a method for efficiently utilizing stone sawing mud containing tin and iron, which comprises the following steps: 1) screening: uniformly stirring stone saw mud slurry, and then screening to obtain screened coarse particles and screened fine particles; 2) desliming: carrying out desliming treatment on the screened fine particles obtained in the step 1) to obtain deslimed coarse particles and fine mud; 3) magnetic separation: magnetically separating the deslimed coarse particles obtained in the step 2) to obtain a magnetic substance and a ceramic raw material. The invention treats the stone saw mud through the processes of screening, desliming, magnetic separation and the like, recovers the high-whiteness ceramic raw material, and can also recover valuable metals such as tin and iron, thereby realizing the effective utilization of waste resources and the comprehensive recovery of metal resources, reducing the waste of resources, reducing the emission and protecting the environment.
Description
Technical Field
The invention relates to a method for utilizing stone saw mud containing tin and iron, in particular to a method for recycling stone saw mud resources, and belongs to the technical field of resource recycling and useful metal utilization.
Background
With the rapid development of urbanization in China, the demand for various building materials is continuously increased, and the stone processing industry is rapidly developed. During the process of mining and processing, a large amount of waste stone powder slurry can be generated, and the particle size of the waste stone powder slurry is very fine. In actual production, the waste stone powder slurry with extremely fine granularity is discharged randomly without treatment, which not only engulfs a large amount of fertile farmlands and reduces the yield of agricultural products, but also the waste stone powder finally flows into rivers to form colloidal stone powder particles in the water to pollute water sources, and the deposited part of the colloidal stone powder particles influences the smoothness of the river channels. If the waste stone powder slurry is transported to other places for landfill, dehydration treatment is needed firstly, which not only increases the treatment cost and the transportation cost, but also further causes environmental pollution and resource waste.
In recent years, in order to meet the requirements of energy conservation and environmental protection, the recycling technology of waste stone powder is developed. The new material corpus (2010) discloses a 'stone bonding and repairing technology' sentence, which indicates that marble waste stone powder can play a role of an adhesive as a filler, and further achieves the effects of reducing the volume shrinkage rate of stone products and repairing traces. Stone (2002, 5 months) discloses a comprehensive utilization technology of industrial wastes of stone, which indicates that the bionic coating with single color tone, low price, bright color and strong natural stone feeling can be obtained by using waste stone powder to produce the bionic coating. The 7 th (2009) of commercial concrete discloses the 'influence research of waste stone powder on concrete performance', and indicates that the workability of concrete mixtures can be improved by partially replacing cement with the waste stone powder, and the concrete anti-permeability performance is well improved. The 34 th volume of building technology, 6 th (2003), discloses the article "application research of stone powder in anti-seismic grouting reinforcement", which indicates that the stone powder is used to replace fine sand as aggregate, thus greatly improving the water retention and fluidity of grout, improving the grouting property, further greatly improving the grouting fullness (more than 90%), and obviously improving the anti-seismic performance of the masonry structure. The 7 th year (2009) of Guangdong building materials discloses the article "producing resin type artificial marble from stone waste", which points out that the production of resin type artificial stone from stone powder has the characteristics of high strength, good toughness, easy processing, etc. Chinese patent publication No. CN105013796A discloses a method for processing waste granite materials into raw materials for ceramic tiles, which comprises the steps of crushing, pulping, permanent magnet iron removal device, vertical ring electromagnetic iron removal device, and box type electromagnetic iron removal device, and processing fine stone powder of 80 meshes or more into raw materials for ceramic tiles.
At present, the utilization status of stone sawing slurry mainly focuses on the aspects of manufacturing the stone sawing slurry into building materials and the like, but no comprehensive recycling process exists for potential recyclable resources such as tin and iron metals, and the recyclable resources are discarded, so that the waste of resources is caused.
In addition, the yield of the plate which is usually used in the day of mining the mountain stone is very low and is only between 20 percent and 25 percent, in addition, 20 percent of the plate becomes saw mud, and the saw mud has very fine granularity of-0.048 mm and accounts for 95 percent. At present, the saw mud is mainly used for manufacturing building materials, or is used as a ceramic raw material after impurity removal by using a strong magnetic separation process, but the lower limit of the granularity selected by a strong magnetic separator is +0.02mm, the saw mud with the granularity of-0.02 mm has no separation effect, the granularity of the saw mud is as fine as-0.048 mm and accounts for 95%, a single strong magnetic separation process is adopted, magnetic substances in the saw mud with the granularity of-0.02 mm cannot be removed, the whiteness of the saw mud after impurity removal is less than 60%, and the saw mud cannot meet the standard of high-grade ceramic raw materials and can only be used as a raw material of low-grade ceramic.
Disclosure of Invention
Aiming at the utilization of the waste stone slurry generated in the stone processing process in the prior art, the waste stone slurry is mainly prepared into building materials, but no comprehensive recycling process exists for potential recyclable resources such as tin and iron metals; in addition, the ceramic raw material recovered by the prior art has low whiteness. The invention treats the stone saw mud through the processes of screening, desliming, magnetic separation and the like, recovers the high-whiteness ceramic raw material, and can also recover valuable metals such as tin and iron, thereby realizing the effective utilization of waste resources and the comprehensive recovery of metal resources, reducing the waste of resources, reducing the emission and protecting the environment.
According to a first embodiment of the present invention, there is provided a method for efficiently using stone sawn mud containing tin and iron, the method comprising the steps of:
1) screening: uniformly stirring stone saw mud slurry containing tin and iron, and adopting a classification granularity of SIs divided intoIs sieved to obtain oversize coarse sieved particles (P0) and undersize fine sieved particles (P1), wherein SIs divided intoIs between 0.12mm and 0.26mm, preferably between 0.14mm and 0.22mm, preferably between 0.16mm and 0.20mm, more preferably 0.18 mm;
2) desliming: subjecting the undersize screened fine particles (P1) obtained in step 1) to a desliming treatment, thereby obtaining fine mud (otherwise known as "ultra-fine mud") and deslimed screened fine particles (P2);
3) magnetic separation of fine particle materials: the deslimed screened fine particles (P2) are subjected to at least one medium magnetic rougher flotation to obtain a medium magnetic rougher concentrate and at least one high magnetic scavenger concentrate to obtain a high magnetic scavenger concentrate, respectively, to obtain a magnetically selected magnetic material (W) (i.e. the medium magnetic rougher concentrate and the high magnetic scavenger concentrate) and a remaining fine material (preferably, the fine material is used as a china clay raw material or a ceramic raw material).
Preferably, the method further comprises:
4) and (3) recovering iron ore concentrate: carrying out at least one weak magnetic concentration on the magnetic material (W) obtained in the step 3) to respectively obtain iron ore concentrate (W1) and residual weak magnetic concentration tailings;
5) and (3) recovering tin concentrate: carrying out strong magnetic separation on the iron separation tailings obtained in the step 4) at least once to obtain primary tin concentrate and strong magnetic separation tailings, and then carrying out table concentration on the primary tin concentrate at least once to obtain tin concentrate (W2) and gravity tailings (or called as concentration tailings).
Preferably, the at least one strong magnetic scavenging in the step 3) comprises one strong magnetic scavenging and two strong magnetic scavenging. Wherein, the first strong magnetic scavenging obtains the first strong magnetic scavenging concentrate (namely, the magnetic material W) and the residual first tailing material, and then the second strong magnetic scavenging is carried out on the first tailing material to obtain the second strong magnetic scavenging concentrate (namely, the magnetic material W) and the residual fine material. Here, the primary strong magnetic scavenged concentrate (i.e., magnetic material W) and the secondary strong magnetic scavenged concentrate (i.e., magnetic material W) may be combined into the magnetic material (W).
Preferably, the at least one weak magnetic concentration in step 4) includes one weak magnetic concentration and two weak magnetic concentrations. The method comprises the steps of carrying out primary weak magnetic concentration on a magnetic material (W) to obtain primary iron ore concentrate and primary weak magnetic concentration tailings, then carrying out secondary weak magnetic concentration on the primary iron ore concentrate to obtain secondary iron ore concentrate (W1) and secondary weak magnetic concentration tailings, and combining the primary weak magnetic concentration tailings and the secondary weak magnetic concentration tailings to obtain iron ore dressing tailings.
Or, the at least one weak magnetic selection in the step 4) comprises one weak magnetic selection, two weak magnetic selections and three weak magnetic selections. The method comprises the steps of carrying out primary weak magnetic concentration on a magnetic material (W) to obtain primary iron ore concentrate and primary weak magnetic concentration tailings, then carrying out secondary weak magnetic concentration on the primary iron ore concentrate to obtain secondary iron ore concentrate and secondary weak magnetic concentration tailings, then carrying out tertiary weak magnetic concentration on the secondary iron ore concentrate to obtain tertiary iron ore concentrate (W1) and tertiary weak magnetic concentration tailings, and combining the primary weak magnetic concentration tailings, the secondary weak magnetic concentration tailings and the tertiary weak magnetic concentration tailings to obtain iron ore concentrate.
Preferably, the sieved coarse sieved particles (P0) obtained in step 1) above are combined with the fine mud obtained in step 2) before the grinding operation is carried out, the resulting finely ground material being incorporated as starting material in the process of the invention into a stone saw mud slurry containing tin and iron. Preferably, the grinding fineness of the iron ore concentrate recovery operation is preferably-0.045 mm and more than or equal to 80%.
Preferably, the screening in the step 1) adopts a high-frequency fine screen. The high-frequency sieve has high efficiency, small amplitude and high sieving frequency. The process is used as coarse screening equipment for screening coarse grains so as to be beneficial to the subsequent sorting operation, and the high-frequency fine screen is the equipment commonly used in the prior art.
Preferably, the desliming in step 2) is treated by a cyclone.
Preferably, the medium magnetic rough separation in the step 3) adopts a wet permanent magnet semi-countercurrent magnetic separator.
Preferably, the magnetic separation equipment for medium magnetic roughing in the operation of recovering the porcelain clay raw material from the stone sawing slurry adopts a wet permanent magnet semi-countercurrent magnetic separator. The surface magnetic induction intensity of the wet permanent magnet semi-countercurrent magnetic separator is 0.1-2T, preferably 0.2-1.8T, and more preferably 0.3-1.6T.
Preferably, the magnetic separation equipment for strong magnetic scavenging (such as primary strong magnetic scavenging and secondary strong magnetic scavenging) can adopt a medium net strong magnetic machine or a wet type electromagnetic iron remover.
Preferably, the surface magnetic induction of the medium net strong magnetic machine or the wet type electromagnetic iron remover is 0.6 to 6T, preferably 0.7 to 5T, and more preferably 0.8 to 4T.
Preferably, in step 4), the magnetic separation equipment for weak magnetic separation (such as primary weak magnetic separation, secondary weak magnetic separation and tertiary weak magnetic separation) can adopt a drum magnetic separator.
Preferably, the magnetic induction of the magnetic separation device for weak magnetic concentration is 0.07-0.13T, preferably 0.07-0.12T, more preferably 0.09-0.11T, such as 0.1T.
Preferably, in the step 5), the magnetic separation equipment for the strong magnetic separation of the tin concentrate recovery operation adopts a pulsating high-gradient wet strong magnetic separator.
Preferably, the surface magnetic induction intensity of the magnetic separation equipment with strong magnetic separation is 0.50-1.2T, preferably 0.60-1.0T, and more preferably 0.75-0.95T. The number of pulsation is 120 to 170 times/min, preferably 130 to 160 times/min, and more preferably 140 to 150 times/min. The ring rotation speed is 1-5 r/min, preferably 1-3 r/min.
In the step 5), the shaking table stroke of shaking table concentration is 6-24 mm, preferably 7-20 mm, and more preferably 8-16 mm. The washing times of the table concentrator selection are 280-360 times/min, and preferably 300-340 times/min. The slope of the bed surface is 0-10 degrees, and preferably 0-5 degrees.
In the present invention, preferably, in step 1), a high-frequency fine sieve is used for classification to obtain coarse sieved particles and fine sieved particles. The particle size of the screened coarse particles is more than 0.18mm, and the particle size of the screened fine particles is less than or equal to 0.18 mm.
In the present invention, it is further preferable that when the desliming is further performed in step 1), the desliming treatment is performed using a cyclone. The lower limit of the particle size sorted by the cyclone is +0.005 mm. The grain diameter of the deslimed coarse grains is more than 0.005mm, and the grain diameter of the deslimed fine grains is less than or equal to 0.005 mm. Because the granularity of magnetic separation is off-line of +0.02mm, and magnetic particles with the granularity less than 0.02mm in the saw mud can not be removed by magnetic separation, aiming at the defect of the existing strong magnetic separation process, the invention adopts the cyclone to separate the ultrafine saw mud, and the lower limit of the granularity of the cyclone separation is +0.005mm, thus the defect of the existing strong magnetic separation process is exactly overcome. And after the coarse saw mud is separated into ultra-fine mud by the cyclone, medium magnetic roughing, primary strong magnetic scavenging and secondary strong magnetic scavenging are respectively carried out.
In the invention, the stone sawn mud is treated, and valuable materials in the stone sawn mud are completely treated and recovered by a physical method. The method of the invention does not use any chemical reagent, ensures the purity of the raw materials and protects the environment. Firstly, the particles with larger particle size in the saw mud are removed through screening, thereby facilitating the subsequent magnetic separation and simultaneously ensuring the whiteness of the obtained ceramic raw material. Then, desliming the screened fine particles by a cyclone through desliming treatment to remove particles with undersize particle sizes; when the magnetic particles with the undersize particle size are subjected to magnetic separation, magnetic separation equipment (medium magnetic roughing equipment and strong magnetic scavenging equipment) cannot adsorb the magnetic particles with the undersize particle size, so that a cyclone with the lower separation particle size limit of +0.005mm is adopted for desliming, and the particles with the undersize particle size in the screened fine particles are separated out. If the part of the sexual particles with the too small particle size can not be separated out after magnetic separation, the sexual particles enter the final ceramic raw material; the substances influencing the whiteness of the ceramic raw materials are just magnetic particles; therefore, the invention adopts the cyclone to carry out desliming treatment to remove magnetic particles with small particle size in the screened fine particles and avoid entering the ceramic raw material, thereby improving the whiteness of the obtained ceramic raw material and improving the economic value of the ceramic raw material. And finally, carrying out magnetic separation treatment on the deslimed coarse particles subjected to desliming treatment to remove magnetic substances in the deslimed coarse particles and improve the whiteness of the ceramic raw material.
In the invention, the weak magnetic substances in the saw mud are removed by adopting gravity separation and strong magnetic separation processes, so that the whiteness of the saw mud reaches over 65 percent, and the saw mud is used as a high-grade ceramic raw material. Aiming at the defect that the existing strong magnetic separation process can not remove magnetic substances in the ultrafine grain saw mud, the invention adopts the cyclone to separate the ultrafine grain saw mud, and the lower limit of the granularity separated by the cyclone is +0.005mm, thus just making up the defects in the existing strong magnetic separation process. Separating the coarse saw mud by a cyclone to obtain ultra-fine mud, and then performing medium magnetic roughing and strong magnetic scavenging respectively to finally obtain a magnetic material and a ceramic raw material with whiteness not less than 65%.
In the invention, the magnetic separation can comprise multi-section medium magnetic rough separation and multi-section strong magnetic scavenging, and can be set according to actual process conditions and product requirements. The more sections are passed by the medium magnetic rough separation and the strong magnetic scavenging, the higher the quality of the obtained ceramic raw material is. According to the medium-magnetic roughing and the strong-magnetic scavenging, the obtained concentrate is magnetic substances, and the medium-magnetic roughing or the strong-magnetic scavenging of the next stage is to treat the tailings obtained by the medium-magnetic roughing or the strong-magnetic scavenging of the previous stage, so that the magnetic substances in the tailings are reduced step by step, the content of the magnetic substances in the ceramic raw material obtained by the strong-magnetic scavenging process is extremely low, and the whiteness of the ceramic raw material is improved.
In the invention, the magnetic substances obtained by magnetic separation are screened again, and tin concentrate of iron concentrate is screened out respectively. Because the magnetism of iron is stronger than that of tin, the iron concentrate in the magnetic substance obtained by magnetic separation can be screened out by weak magnetic separation. And (4) screening out the iron ore concentrate to obtain the tin-containing ore, and carrying out strong magnetic separation on the tin-containing ore to obtain the tin ore concentrate.
In the invention, the screened coarse particles in the step 1), the desliming fine particles in the step 2) and the tailings in the step 5) are combined to form the total tailings, and the total tailings can be used for other purposes such as construction and the like.
In the invention, aiming at the magnetic substances obtained in the step 3), multistage weak magnetic separation can be adopted to screen out iron ore concentrate. In multiple times of weak magnetic separation, the concentrate obtained in the previous section of weak magnetic separation is processed in the next section of weak magnetic separation, and the iron concentrate with higher quality is finally obtained through multiple times of processing of the concentrate.
In the invention, the tailings after multiple times of weak magnetic separation treatment are combined to obtain the tin-containing ore. And (4) carrying out multistage strong magnetic separation on the tin-containing ore to screen out tin concentrate. In multiple times of strong magnetic separation, the concentrate obtained in the previous section of strong magnetic separation is treated in the next section of strong magnetic separation, and tin concentrate with higher quality is finally obtained through multiple times of treatment on the concentrate.
The method utilizes the waste stone saw mud resources to recycle and obtain the ceramic raw material with high whiteness and simultaneously obtain the high-grade iron ore concentrate and tin ore concentrate through a proper process.
Because the granularity of magnetic separation is +0.02mm, the magnetic particles with the granularity of less than 0.02mm in the saw mud can not be removed by magnetic separation, and in the prior art, the magnetic particles with the granularity of less than 0.02mm enter the finally obtained ceramic raw material, thereby seriously influencing the whiteness of the ceramic raw material and reducing the quality of the ceramic raw material. The process for treating the stone saw mud skillfully removes the magnetic particles with the undersize particle diameters in the screened fine particles through desliming treatment, reduces the magnetic substances in the finally obtained ceramic raw materials, improves the whiteness of the ceramic raw materials, and also improves the quality of the ceramic raw materials.
In addition, in the prior art, the magnetic substances obtained by magnetic separation are a mixture of iron ore concentrate, tin ore concentrate and other impurities, the method utilizes the magnetic difference of iron and tin, adopts weak magnetic separation and strong magnetic separation to treat the magnetic substances, firstly separates the iron ore concentrate from the magnetic substances by the weak magnetic separation, then separates the tin ore concentrate from the magnetic substances by the strong magnetic separation, and finally, the rest is tailings, so that the method is used for other fields such as buildings. The magnetic materials are treated by the process to obtain high-grade iron ore concentrate and tin ore concentrate; greatly improving the utilization value of the recovered substances.
Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
1. the process can obtain high-quality porcelain clay raw material with the yield of more than 50 percent, the TFe content of less than 0.20 percent and the whiteness of more than 60 percent.
2. The process can obtain iron ore concentrate with iron grade higher than 60% and recovery rate higher than 30%.
3. The process can obtain tin concentrate with tin grade higher than 15% and recovery rate higher than 30%.
4. Compared with the existing stone processing waste material utilization process, the invention recovers the valuable metals of tin and iron while recovering the high-whiteness ceramic raw material from the stone sawing slurry, realizes the effective utilization of waste resources and the comprehensive recovery of metal resources, reduces the waste of resources, reduces the emission and protects the environment.
Drawings
FIG. 1 is a process flow chart of a method for efficiently utilizing stone sawn mud containing tin and iron according to the invention;
FIG. 2 is a process flow diagram of example 2 of the present invention;
FIG. 3 is a flow chart of a process for screening magnetic substances in example 3 of the present invention;
FIG. 4 is a flow chart of the magnetic substance screening process in example 4 of the present invention.
Detailed Description
According to a first embodiment of the present invention, there is provided a method for efficiently using stone sawn mud containing tin and iron, the method comprising the steps of:
1) screening: uniformly stirring stone saw mud slurry containing tin and iron, and adopting a classification granularity of SIs divided intoSieving with a sieve to obtainObtaining the oversize coarse particles (P0) and undersize fine particles (P1), wherein SIs divided intoIs between 0.12mm and 0.26mm, preferably between 0.14mm and 0.22mm, preferably between 0.16mm and 0.20mm, more preferably 0.18 mm;
2) desliming: subjecting the undersize screened fine particles (P1) obtained in step 1) to a desliming treatment, thereby obtaining fine mud (otherwise known as "ultra-fine mud") and deslimed screened fine particles (P2);
3) magnetic separation of fine particle materials: the deslimed screened fine particles (P2) are subjected to at least one medium magnetic rougher flotation to obtain a medium magnetic rougher concentrate and at least one high magnetic scavenger concentrate to obtain a high magnetic scavenger concentrate, respectively, to obtain a magnetically separated magnetic material (W) (i.e. a medium magnetic rougher concentrate and a high magnetic scavenger concentrate) and a remaining fine material (preferably, it is used as a china clay or ceramic raw material).
Preferably, the method further comprises:
4) and (3) recovering iron ore concentrate: carrying out at least one weak magnetic concentration on the magnetic material (W) obtained in the step 3) to respectively obtain iron ore concentrate (W1) and residual weak magnetic concentration tailings;
5) and (3) recovering tin concentrate: carrying out strong magnetic separation on the iron separation tailings obtained in the step 4) at least once to obtain primary tin concentrate and strong magnetic separation tailings, and then carrying out table concentration on the primary tin concentrate at least once to obtain tin concentrate (W2) and gravity tailings (or called as concentration tailings).
Preferably, the at least one strong magnetic scavenging in the step 3) includes one strong magnetic scavenging and two strong magnetic scavenging, wherein the one strong magnetic scavenging obtains one strong magnetic scavenging concentrate (i.e. magnetic material) and the rest of the primary tailings material, and then the two strong magnetic scavenging is performed on the primary tailings material to obtain two strong magnetic scavenging concentrates (i.e. magnetic material) and the rest of the fine material.
Preferably, the at least one weak magnetic concentration in the step 4) comprises a primary weak magnetic concentration and a secondary weak magnetic concentration, wherein the primary weak magnetic concentration of the magnetic material (W) obtains a primary iron concentrate and a primary weak magnetic concentration tailing, the secondary weak magnetic concentration of the primary iron concentrate obtains a secondary iron concentrate (W1) and a secondary weak magnetic concentration tailing, and the primary weak magnetic concentration tailing and the secondary weak magnetic concentration tailing are combined to obtain the iron concentration tailing.
Or, the at least one weak magnetic concentration in the step 4) comprises one weak magnetic concentration, two weak magnetic concentrations and three weak magnetic concentrations, wherein the one weak magnetic concentration of the magnetic material (W) is carried out to obtain one iron ore concentrate and one weak magnetic concentration tailings, then the two weak magnetic concentrations of the one iron ore concentrate are carried out to obtain two iron ore concentrates and two weak magnetic concentration tailings, then the three weak magnetic concentrations of the two iron ore concentrates are carried out to obtain three iron ore concentrates (W1) and three weak magnetic concentration tailings, and the one weak magnetic concentration tailings, the two weak magnetic concentration tailings and the three weak magnetic concentration tailings are combined to obtain iron ore concentrate.
Preferably, the sieved coarse sieved particles (P0) obtained in step 1) above are combined with the fine mud obtained in step 2) before the grinding operation is carried out, the resulting finely ground material being incorporated as starting material in the process of the invention into a stone saw mud slurry containing tin and iron. Preferably, the grinding fineness of the iron ore concentrate recovery operation is preferably-0.045 mm and more than or equal to 80%.
Preferably, the screening in the step 1) adopts a high-frequency fine screen.
Preferably, the desliming in step 2) is treated by a cyclone.
Preferably, the medium magnetic rough separation in the step 3) adopts a wet permanent magnet semi-countercurrent magnetic separator.
Preferably, the magnetic separation equipment for medium magnetic roughing in the operation of recovering the porcelain clay raw material from the stone sawing slurry adopts a wet permanent magnet semi-countercurrent magnetic separator. The surface magnetic induction intensity of the wet permanent magnet semi-countercurrent magnetic separator is 0.1-2T, preferably 0.2-1.8T, and more preferably 0.3-1.6T.
Preferably, the magnetic separation equipment for strong magnetic scavenging (such as primary strong magnetic scavenging and secondary strong magnetic scavenging) can adopt a medium net strong magnetic machine or a wet type electromagnetic iron remover.
Preferably, the surface magnetic induction of the medium net strong magnetic machine or the wet type electromagnetic iron remover is 0.6 to 6T, preferably 0.7 to 5T, and more preferably 0.8 to 4T.
Preferably, in step 4), the magnetic separation equipment for weak magnetic separation (such as primary weak magnetic separation, secondary weak magnetic separation and tertiary weak magnetic separation) can adopt a drum magnetic separator.
Preferably, the magnetic induction of the magnetic separation device for weak magnetic concentration is 0.07-0.13T, preferably 0.08-0.12T, more preferably 0.09-0.11T, such as 0.1T.
Preferably, in the step 5), the magnetic separation equipment for the strong magnetic separation of the tin concentrate recovery operation adopts a pulsating high-gradient wet strong magnetic separator.
Preferably, the surface magnetic induction intensity of the magnetic separation equipment with strong magnetic separation is 0.50-1.2T, preferably 0.60-1.0T, and more preferably 0.75-0.95T. The number of pulsation is 120 to 170 times/min, preferably 130 to 160 times/min, and more preferably 140 to 150 times/min. The ring rotation speed is 1-5 r/min, preferably 1-3 r/min.
In the step 5), the shaking table stroke of shaking table concentration is 6-24 mm, preferably 7-20 mm, and more preferably 8-16 mm. The washing times of the table concentrator selection are 280-360 times/min, and preferably 300-340 times/min. The slope of the bed surface is 0-10 degrees, and preferably 0-5 degrees.
Example 1
As shown in fig. 1, a method for efficiently using stone sawing mud includes the following steps:
1) screening: 60kg of stone saw mud slurry containing tin and iron is uniformly stirred and then the classification granularity (cut size) is SIs divided intoIs sieved to obtain oversize coarse sieved particles (P0) and undersize fine sieved particles (P1), wherein SIs divided intoIs 0.18mm (i.e., the cut-off size); wherein: the particle size of the sieved coarse particles is more than 0.18mm, and the particle size of the sieved fine particles (P1) is less than or equal to 0.18 mm;
2) desliming: carrying out desliming treatment on the screened fine particles (P1) obtained in the step 1) by adopting a cyclone to obtain fine mud and desliming screened fine particles (P2); wherein: the lower limit of the particle size sorted by the cyclone is +0.005 mm. The particle size of the deslimed screened fine particles (P2) is more than 0.005mm, and the particle size of the fine mud is less than or equal to 0.005 mm;
3) magnetic separation: the deslimed screened fine particles (P2) are subjected to a medium magnetic rougher flotation to obtain a medium magnetic rougher concentrate and a strong magnetic scavenger concentrate, respectively, to obtain a magnetically selected magnetic material (W) (i.e., the medium magnetic rougher concentrate and the strong magnetic scavenger concentrate) and a remaining fine material (preferably, it is used as a china clay raw material or a ceramic raw material).
The whiteness of the obtained ceramic raw material (44.8kg) reaches 63 percent by treating the stone saw mud through the process method.
Example 2
Example 1 is repeated except that the process further comprises:
4) and (3) recovering iron ore concentrate: carrying out primary weak magnetic concentration on the magnetic material (W) obtained in the step 3) to respectively obtain iron ore concentrate (W1) and residual iron ore tailings;
5) and (3) recovering tin concentrate: carrying out primary strong magnetic separation on the iron separation tailings obtained in the step 4) to obtain primary tin concentrate and strong magnetic separation tailings, and then carrying out primary table concentration on the primary tin concentrate to obtain tin concentrate (W2) and gravity tailings.
Example 3
Example 2 is repeated except that the strong magnetic scavenging of step 3) comprises primary strong magnetic scavenging and secondary strong magnetic scavenging, wherein the primary strong magnetic scavenging obtains primary strong magnetic scavenging concentrate (i.e. magnetic material) and residual primary tailing material, and then the secondary strong magnetic scavenging is carried out on the primary tailing material to obtain secondary strong magnetic scavenging concentrate (i.e. magnetic material) and residual fine material.
Wherein: the medium magnetic roughing adopts a wet permanent magnet semi-countercurrent magnetic separator, and the surface magnetic induction intensity of the wet permanent magnet semi-countercurrent magnetic separator is 1.0T. The strong magnetic scavenging adopts a medium net strong magnetic machine, and the surface magnetic induction intensity of the medium net strong magnetic machine is 3.2T.
The whiteness of the obtained ceramic raw material reaches 65 percent by treating the stone saw mud through the process method.
Example 4
As shown in fig. 2, example 3 is repeated except that the weak magnetic concentration in step 4) includes primary weak magnetic concentration and secondary weak magnetic concentration, wherein the primary weak magnetic concentration on the magnetic material (W) obtains primary iron concentrate and primary weak magnetic concentration tailings, then the secondary weak magnetic concentration on the primary iron concentrate obtains secondary iron concentrate (W1) and secondary weak magnetic concentration tailings, and the primary weak magnetic concentration tailings and the secondary weak magnetic concentration tailings are combined to obtain iron concentration tailings.
Wherein: the magnetic separation equipment for weak magnetic concentration can adopt a drum type magnetic separator; the magnetic induction intensity of the drum magnetic separator is 0.1T. The magnetic separation equipment for the strong magnetic separation of the tin concentrate recovery procedure adopts a pulsating high-gradient wet strong magnetic separator, and the surface magnetic induction intensity of the pulsating high-gradient wet strong magnetic separator is 0.8T.
The stone sawing mud is treated by the process, and the iron ore concentrate with the iron grade reaching 62% and the recovery rate of 35% is obtained. Obtaining tin concentrate with 23% tin grade and 39% recovery rate.
Example 5
Example 3 is repeated except that the weak magnetic concentration in step 4) includes primary weak magnetic concentration, secondary weak magnetic concentration and tertiary weak magnetic concentration, wherein the primary weak magnetic concentration of the magnetic material (W) obtains primary iron concentrate and primary weak magnetic concentration tailings, the secondary weak magnetic concentration of the primary iron concentrate obtains secondary iron concentrate and secondary weak magnetic concentration tailings, the tertiary weak magnetic concentration of the secondary iron concentrate obtains tertiary iron concentrate (W1) and tertiary weak magnetic concentration tailings, and the primary weak magnetic concentration tailings, the secondary weak magnetic concentration tailings and the tertiary weak magnetic concentration tailings are combined to obtain iron concentrate tailings.
Wherein: the magnetic separation equipment for weak magnetic concentration can adopt a drum type magnetic separator; the magnetic induction intensity of the drum magnetic separator is 0.08T. The magnetic separation equipment for the strong magnetic separation of the tin concentrate recovery procedure adopts a pulsating high-gradient wet strong magnetic separator, and the surface magnetic induction intensity of the pulsating high-gradient wet strong magnetic separator is 1.0T.
The stone sawing mud is treated by the process, and the iron ore concentrate with the iron grade of 65 percent and the recovery rate of 31 percent is obtained. Obtaining the tin concentrate with 23% tin grade and 36% recovery rate.
Example 6
Example 5 is repeated except that the tin concentrate is further refined to obtain refined tin concentrate and refined tailings; the concentration tailings are incorporated into tailings.
Wherein: and (4) selecting by adopting a shaking table. The stroke of the shaking table is 12mm, the stroke frequency is 320 times/min, and the gradient of the bed surface is 4 ℃.
The stone sawing mud is treated by the process, and the tin concentrate with the tin grade of 25% and the recovery rate of 33% is obtained.
Example 7
Example 6 was repeated except that the magnetic separation in step 3) included 3 stages of medium magnetic roughing and 5 stages of strong magnetic scavenging. The strong magnetic separation adopts a wet type electromagnetic iron remover. Wherein: the surface magnetic induction intensity of the wet permanent magnet semi-countercurrent magnetic separator is 1.5T, and the surface magnetic induction intensity of the wet electromagnetic iron remover is 4T.
Example 8
Example 6 was repeated except that the low magnetic separation in step 4) included 3 stages of low magnetic separation. The strong magnetic separation comprises 3 sections of strong magnetic separation. Wherein: the magnetic induction of the drum magnetic separator is 0.12T, and the surface magnetic induction of the pulsating high-gradient wet strong magnetic separator is 0.6T.
Application examples
The ceramic raw materials with different whiteness have larger price difference, and are shown in table 1.
6000 tons of sawn mud are produced per month by a certain mining company in unveiled Yang city, 4470 tons of ceramic raw materials are recovered, the ceramic raw materials with the whiteness of 55-60% can be obtained by adopting the original strong magnetic separation process, and the economic income is 581100 yuan-670500 yuan; the ceramic raw material with the whiteness of 65-70% can be obtained by adopting the gravity separation and strong magnetic separation process, the economic income reaches 894000 yuan, compared with the original process, the economic income can be increased by 223500 yuan-312900 yuan per month, and the economic benefit is greatly improved.
TABLE 1 ceramic raw material price table
| Whiteness (%) | 50 | 55 | 60 | 65 | 70 |
| Price (Yuan/t) | 100 | 130 | 150 | 200 | 200 |
Claims (25)
1. A method for efficiently utilizing stone sawing mud containing tin and iron comprises the following steps:
1) screening: uniformly stirring stone saw mud slurry containing tin and iron, and adopting a classification granularity of SIs divided intoIs sieved to obtain oversize coarse sieved particles (P0) and undersize fine sieved particles (P1), wherein SIs divided intoIs between 0.12mm and 0.26 mm;
2) desliming: subjecting the undersize screened fine particles (P1) obtained in step 1) to a de-sliming treatment, thereby obtaining fine slimes and de-slimed screened fine particles (P2);
3) magnetic separation of fine particle materials: subjecting the deslimed screened fine particles (P2) to at least one medium magnetic roughing to obtain a medium magnetic roughing concentrate and at least one strong magnetic scavenging to obtain a strong magnetic scavenging concentrate, thereby obtaining a magnetically sorted magnetic material (W) and a remaining fine material;
4) and (3) recovering iron ore concentrate: carrying out at least one weak magnetic concentration on the magnetic material (W) obtained in the step 3) to respectively obtain iron ore concentrate (W1) and residual iron ore tailings;
5) and (3) recovering tin concentrate: carrying out strong magnetic separation on the iron separation tailings obtained in the step 4) at least once to obtain primary tin concentrate and strong magnetic separation tailings, and then carrying out table concentration on the primary tin concentrate at least once to obtain tin concentrate (W2) and gravity tailings.
2. The method of claim 1, wherein: fractional particle size SIs divided intoIs between 0.14mm and 0.22 mm; the fine material is used as a porcelain clay raw material or a ceramic raw material.
3. The method of claim 1, wherein: fractional particle size SIs divided intoIs between 0.16mm and 0.20 mm.
4. The method according to any one of claims 1-3, characterized in that the at least one strong magnetic sweep in step 3) comprises a strong magnetic sweep and a secondary strong magnetic sweep, wherein the first strong magnetic sweep results in a primary strong magnetic sweep concentrate and the remaining primary tailings material, and the secondary strong magnetic sweep is performed on the primary tailings material to yield a secondary strong magnetic sweep concentrate and the remaining fine material.
5. The method according to claim 1, characterized in that the at least one weak magnetic concentration in step 4) comprises a primary weak magnetic concentration and a secondary weak magnetic concentration, wherein the primary weak magnetic concentration of the magnetic material (W) obtains a primary iron concentrate and a primary weak magnetic concentration tailings, the secondary weak magnetic concentration of the primary iron concentrate obtains a secondary iron concentrate (W1) and a secondary weak magnetic concentration tailings, and the primary weak magnetic concentration tailings and the secondary weak magnetic concentration tailings are combined to obtain the iron concentration tailings.
6. The method according to claim 1, wherein the at least one weak magnetic concentration in step 4) comprises one weak magnetic concentration, two weak magnetic concentrations and three weak magnetic concentrations, wherein the one weak magnetic concentration performed on the magnetic material (W) yields one iron concentrate and one weak magnetic concentration tailings, the one weak magnetic concentration is performed on the one iron concentrate to yield one iron concentrate and two weak magnetic concentration tailings, the two iron concentrate is performed on the one iron concentrate to yield one iron concentrate and two weak magnetic concentration tailings, the three weak magnetic concentration is performed on the one iron concentrate to yield one iron concentrate (W1) and three weak magnetic concentration tailings, and the one weak magnetic concentration tailings, the two weak magnetic concentration tailings and the three weak magnetic concentration tailings are combined to yield one iron concentrate.
7. The method according to any one of claims 1 to 3 and 5 to 6, wherein the sieving in step 1) is performed by using a high-frequency fine sieve; and/or
And 2) treating the desliming by adopting a cyclone.
8. The method according to claim 4, wherein the sieving in step 1) is performed by using a high-frequency fine sieve; and/or
And 2) treating the desliming by adopting a cyclone.
9. The method of any one of claims 1-3, 5-6, 8, wherein: in the step 3), wet permanent magnet semi-countercurrent magnetic separator is adopted for medium magnetic roughing; and/or
In the step 3), a medium net strong magnet machine or a wet type electromagnetic iron remover is adopted for strong magnetic scavenging.
10. The method of claim 4, wherein: in the step 3), wet permanent magnet semi-countercurrent magnetic separator is adopted for medium magnetic roughing; and/or
In the step 3), a medium net strong magnet machine or a wet type electromagnetic iron remover is adopted for strong magnetic scavenging.
11. The method of claim 9, wherein: the surface magnetic induction intensity of the wet permanent magnet semi-countercurrent magnetic separator is 0.1-2T; and/or
The surface magnetic induction intensity of the medium net strong magnetic machine or the wet type electromagnetic iron remover is 0.6-6T.
12. The method of claim 10, wherein: the surface magnetic induction intensity of the wet permanent magnet semi-countercurrent magnetic separator is 0.1-2T; and/or
The surface magnetic induction intensity of the medium net strong magnetic machine or the wet type electromagnetic iron remover is 0.6-6T.
13. The method according to claim 11 or 12, characterized in that: the surface magnetic induction intensity of the wet permanent magnet semi-countercurrent magnetic separator is 0.2-1.8T; and/or
The surface magnetic induction intensity of the medium net strong magnetic machine or the wet type electromagnetic iron remover is 0.7-5T.
14. The method of claim 13, wherein: the surface magnetic induction intensity of the wet permanent magnet semi-countercurrent magnetic separator is 0.3-1.6T; and/or
The surface magnetic induction intensity of the medium net strong magnetic machine or the wet type electromagnetic iron remover is 0.8-4T.
15. The method according to any one of claims 1, 5, 6, wherein: in the step 4), the magnetic separation equipment for weak magnetic concentration adopts a drum magnetic separator.
16. The method of claim 15, wherein: the magnetic induction intensity of the magnetic separation equipment for weak magnetic concentration is 0.07-0.13T.
17. The method of claim 15, wherein: the magnetic induction intensity of the magnetic separation equipment for weak magnetic concentration is 0.07-0.12T.
18. The method of claim 15, wherein: the magnetic induction intensity of the magnetic separation equipment for weak magnetic concentration is 0.09-0.11T.
19. The method of claim 1, wherein: in the step 5), the magnetic separation equipment for strong magnetic separation in the tin concentrate recovery process adopts a pulsating high-gradient wet strong magnetic separator.
20. The method of claim 19, wherein: the surface magnetic induction intensity of the magnetic separation equipment with strong magnetic separation is 0.50-1.2T; the pulsation frequency of the magnetic separation equipment for strong magnetic separation is 120-170 times/min; the ring rotation speed is 1-5 r/min.
21. The method of claim 19, wherein: the surface magnetic induction intensity of the magnetic separation equipment with strong magnetic separation is 0.60-1.0T; the pulsation frequency of the magnetic separation equipment for strong magnetic separation is 130-160 times/min; the ring rotation speed is 1-3 r/min.
22. The method of claim 19, wherein: the surface magnetic induction intensity of the magnetic separation equipment with strong magnetic separation is 0.75-0.95T; the pulsation frequency of the magnetic separation equipment for strong magnetic separation is 140-150 times/min.
23. The method of any one of claims 1, 19-22, wherein: in the step 5), the shaking table stroke of shaking table fine selection is 6-24 mm; the washing times of the table concentrator are 280-360 times/min; the slope of the bed surface is 0-10 degrees.
24. The method of claim 23, wherein: in the step 5), the shaking table stroke of shaking table fine selection is 7-20 mm; the washing times of the table concentrator selection are 300-340 times/min; the slope of the bed surface is 0-5 degrees.
25. The method of claim 23, wherein: in the step 5), the shaking table stroke of shaking table fine selection is 8-16 mm.
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| CN102225357A (en) * | 2011-05-27 | 2011-10-26 | 云南锡业集团（控股）有限责任公司 | Branch gravity concentration method for recovering accompanying tin from semi-finished product of magnetic concentrated iron of iron-tin ore |
| CN103372498A (en) * | 2012-04-24 | 2013-10-30 | 李志铁 | Method for separating and treating granite saw powder and usage thereof |
| CN104941795A (en) * | 2015-07-15 | 2015-09-30 | 马凤祥 | Separation method for low-grade manganese ore with high silicon accompanying a little limonite and psilomelane |
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| CN102728478A (en) * | 2012-07-07 | 2012-10-17 | 蚌埠玻璃工业设计研究院 | Beneficiation method for extracting feldspar and quartz from granite |
| CN104646171B (en) * | 2014-07-30 | 2017-04-19 | 许树清 | Separation treatment method for granite powder and gold-iron deposit tailings |
| CN104492590B (en) * | 2014-12-12 | 2017-07-18 | 南京梅山冶金发展有限公司 | A kind of complex iron ore dressing method |
| CN104941780B (en) * | 2015-07-02 | 2017-05-31 | 中国瑞林工程技术有限公司 | A kind of ore-dressing technique for efficiently separating tantalum, tin and zinnwaldite |
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| CN103372498A (en) * | 2012-04-24 | 2013-10-30 | 李志铁 | Method for separating and treating granite saw powder and usage thereof |
| CN104941795A (en) * | 2015-07-15 | 2015-09-30 | 马凤祥 | Separation method for low-grade manganese ore with high silicon accompanying a little limonite and psilomelane |
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