CN217069174U - Dry impurity removal treatment system for low-grade bauxite - Google Patents
Dry impurity removal treatment system for low-grade bauxite Download PDFInfo
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- CN217069174U CN217069174U CN202122475890.XU CN202122475890U CN217069174U CN 217069174 U CN217069174 U CN 217069174U CN 202122475890 U CN202122475890 U CN 202122475890U CN 217069174 U CN217069174 U CN 217069174U
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Abstract
The utility model belongs to the technical field of bauxite beneficiation, in particular to a low-grade bauxite dry impurity removal processing system, which comprises an ore crushing and grinding system, an ore roasting and desulfurization system, a dry magnetic separation system and a leaching and desiliconization system which are connected in sequence; the ore crushing and grinding system comprises a crushing and screening system and a grinding and selecting system; the crushing and screening system comprises a crusher and a screening machine which are connected in a circulating manner; the grinding and sorting system comprises an ore grinding machine and a winnowing machine which are connected in a circulating manner; the ore roasting and desulfurizing system comprises a No. 1 feeder, a cyclone preheater, a suspension roasting furnace and a cyclone cooler which are sequentially connected through pipelines; the rear end of the cyclone cooler is connected with a concentrate bin; the dry magnetic separation system comprises a No. 2 feeder and a dry magnetic separator which are connected in sequence. The utility model discloses realize the low-grade complicated difficult edulcoration and the grade promotion of utilizing bauxite, finally generate high-quality low sulphur low silicon low iron bauxite concentrate and by-product magnetism thing.
Description
Technical Field
The utility model belongs to the technical field of bauxite beneficiation, specifically be a low-grade bauxite dry process edulcoration processing system.
Background
Along with social development, continuous development and utilization of resources and gradual exhaustion of domestic high-grade bauxite, most of the existing ores have the composite characteristics of high sulfur, high silicon and high iron, and in order to efficiently remove impurities such as sulfur, silicon, iron and the like on line, a low-grade bauxite dry-method impurity removal treatment system is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low-grade bauxite dry process edulcoration processing system breaks through the ore and grinds comprehensive processing of system, ore calcination desulfurization system, dry process magnetic separation system, alkali leaching desiliconization system, realizes the complicated difficult bauxite edulcoration of low-grade and grade promotion.
The technical scheme is as follows:
a low-grade bauxite dry impurity removal processing system comprises an ore crushing and grinding system, an ore roasting and desulfurization system, a dry magnetic separation system and an alkaline leaching and desiliconization system; forming a process chain which is difficult to utilize ore for desulfurization, deironing and desiliconization.
The ore crushing and grinding system comprises a crushing and screening system and a grinding and selecting system; the crushing and screening system comprises a crusher and a screening machine which are connected in a circulating manner; the grinding and sorting system comprises an ore grinding machine and a winnowing machine which are connected in a circulating manner; the screening machine and the ore grinding machine are connected through a belt, and the rear end of the air separation machine is connected with a powder bin;
the ore roasting desulfurization system comprises a first feeder, a cyclone preheater, a suspension roaster and a cyclone cooler which are sequentially connected through pipelines; the feeding machine is connected with the powder bin; the cyclone preheater is also connected with a flue gas purification device, the suspension roasting furnace is connected with a hot blast stove, and the hot blast stove is connected with the flue gas purification device to realize the comprehensive treatment of the flue gas; the cyclone cooler is circularly connected with the cyclone preheater through a pipeline, so that the comprehensive utilization of heat is improved; the rear end of the cyclone cooler is connected with a concentrate bin;
the dry magnetic separation system comprises a second feeder and a dry magnetic separator which are connected in sequence; the magnetic separation deironing and impurity removal can be realized through a dry magnetic separator, and by-product magnetic substances are obtained.
The leaching desiliconization system comprises a size mixing barrel, a stirring leaching tank and a filter which are connected in sequence; the filter is also sequentially connected with the waste alkali liquor treatment device, the alkali liquor storage tank and the stirring leaching tank in a circulating manner through pipelines; the comprehensive utilization of the alkali liquor is realized, and the resources are saved.
The crushing and screening system is a three-stage screening system and comprises a primary crusher, a primary screening machine, a secondary crusher, a secondary screening machine, a three-stage crusher and a three-stage screening machine; one-level breaker and one-level screening machine cyclic connection, second grade breaker and second grade screening machine cyclic connection, tertiary breaker and tertiary screening machine cyclic connection, through multistage crushing screening system, improve the broken condition of raw ore deposit.
The low-grade complex difficult-to-utilize bauxite ore is sent into a primary crusher from a raw ore bin through a forklift and a belt, the bauxite ore is coarsely crushed and then is screened through a primary screening machine, the oversize part returns to the primary crusher, the undersize part enters a secondary crusher to be finely crushed, the undersize part is screened through the secondary screening machine, the oversize part returns to the secondary crusher, the undersize part enters a tertiary crusher to be finely crushed, the finely crushed ore is screened through the tertiary screening machine, the oversize part returns to the tertiary crusher, the undersize part enters a grinding machine to be ground to obtain raw powder ore, the raw powder ore is separated through a winnowing machine, the coarse particles return to the grinding machine to be ground again, and the fine powder ore meeting the requirements is conveyed to a powder bin through a pipeline and then temporarily stored in a buffer bin.
The raw powder ore produced by the ore crushing and grinding system is fed from the buffer bin through the first feeding machine of the pipeline, then enters the suspension roasting furnace supplied with heat through the hot blast stove after being preheated by the cyclone preheater to be roasted and desulfurized, and the generated high-temperature mineral powder is cooled by the cyclone cooler to obtain low-temperature low-sulfur fine powder ore and is sent to the fine ore bin through the pipeline. Meanwhile, high-temperature flue gas generated by the suspension roasting furnace and hot air replaced in the cyclone cooler return to the preheater to preheat raw ore powder, and flue gas generated by the cyclone preheater and the hot blast stove is purified by a flue gas purification device and then discharged.
The low-sulfur fine ore obtained through the ore roasting desulfurization system is conveyed to the first feeder from the fine ore bin through a pipeline, then is subjected to magnetic separation and deironing through a dry magnetic separator, and low-sulfur and low-iron concentrate mixed materials and magnetic substances are obtained after deironing, and the magnetic substances are stored as byproducts.
Sending the low-sulfur low-iron concentrate obtained by the dry magnetic separation system into a pulp mixing barrel through a pipeline to prepare pulp, then sending the pulp into a stirring leaching tank, adding alkali liquor into an alkali liquor storage tank, carrying out alkali leaching desilicification, and filtering the pulp by a No. 2 filter to obtain a low-sulfur low-silicon low-iron concentrate finished product and waste alkali liquor; the waste alkali liquor is treated by the waste alkali liquor treatment device and then returns to the alkali liquor storage tank for recycling in the alkali leaching desilicication.
The utility model discloses realize the complicated difficult edulcoration and the grade promotion of utilizing the bauxite of low grade, finally generate high-quality low sulphur low silicon low iron bauxite concentrate and by-product magnetism thing, the cyclic utilization of heat energy and the cyclic utilization of alkali lye in whole system realize the comprehensive utilization of resource simultaneously.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention.
Detailed Description
With reference to the exemplary embodiments, technical problems, aspects, and advantages of the present invention will be clarified. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in different forms. The description is merely exemplary in nature and is intended to provide a thorough understanding of the present invention by those of ordinary skill in the relevant art.
The utility model discloses a low-grade bauxite dry process edulcoration processing system, including broken system, ore calcination desulfurization system, dry process magnetic separation system and the alkaline leaching desiliconization system of grinding of the ore that connects gradually.
The ore crushing and grinding system comprises a primary crusher 2, a primary vibrating screening machine 3, a secondary crusher 4, a secondary vibrating screening machine 5, a tertiary crusher 6, a tertiary vibrating screening machine 7, an ore grinding machine 8 and a winnowing machine 9 which are connected in sequence; the primary crusher 2 is circularly connected with the primary vibrating screening machine 3 through a belt, the secondary crusher 4 is circularly connected with the secondary vibrating screening machine 5 through a belt, the tertiary crusher 6 is circularly connected with the tertiary vibrating screening machine 7 through a belt, and the ore grinding machine 8 is circularly connected with the air separation machine 9 through a pipeline; the rear end of the winnowing machine 9 is connected with a powder bin 10.
The ore roasting desulfurization system comprises a feeder 15, a cyclone preheater 16, a suspension roasting furnace 17 and a cyclone cooler 18 which are connected in sequence through pipelines; the cyclone preheater 16 is also connected with a flue gas purification device 20, the suspension roasting furnace 17 is connected with a hot blast stove 19, the hot blast stove 19 is connected with the flue gas purification device 20, and the cyclone cooler 18 is circularly connected with the cyclone preheater 16 through a pipeline; the rear end of the cyclone cooler 18 is connected with a concentrate bin 21;
the dry magnetic separation system comprises a second feeder 30 and a dry magnetic separator 31 which are connected in sequence; the second feeder 30 is connected with the concentrate bin 21;
the leaching desiliconization system comprises a size mixing barrel 36, a stirring leaching tank 37 and a filter 38 which are connected in sequence; the filter 38 is also sequentially connected with a waste alkali liquor treatment device 39, an alkali liquor storage tank 40 and a stirring leaching tank 37 in a circulating way through pipelines;
conveying low-grade complex and difficult-to-utilize bauxite ore from a raw ore bin 1 to a primary crusher 2 through a forklift and a belt to be crushed to be less than 150mm, screening the coarsely crushed ore by a primary vibrating screening machine 3, and returning the ore with the granularity of more than 150mm to the primary crusher 2 through the belt to be crushed again; ore with the granularity of less than 150mm enters a secondary crusher 4 through a belt, the ore after secondary crushing is screened by a secondary vibrating screening machine 5, and the ore with the granularity of more than 50mm returns to the secondary crusher 4 through the belt to be crushed again; ore with the granularity of less than 50mm enters a three-stage crusher 6 through a belt to be finely crushed, the finely crushed ore is screened by a three-stage vibrating screening machine 7, and the ore with the granularity of more than 5mm returns to the three-stage crusher 6 through the belt to be crushed again; ore with the particle size smaller than 5mm enters an ore grinding machine 8 through a belt to be ground into mineral powder, the mineral powder is separated by a winnowing machine, and the ore with the particle size larger than 0.15mm returns to the ore grinding machine 8 through a pipeline; the particle size less than 0.15mm enters the powder bin 10 through a pipeline and then is sent to the buffer bin 14.
Raw powder ore produced by an ore crushing and grinding system is fed from a buffer bin 14 through a pipeline No. 1 feeder 15, is preheated by a cyclone preheater 16, enters a suspension roasting furnace 17 supplied with heat through a hot blast furnace 19, is roasted and desulfurized at the temperature of 950 ℃ of 500 plus materials, and the produced high-temperature ore powder is cooled by a cyclone cooler 18 to obtain low-temperature low-sulfur fine powder ore which is sent to a fine ore bin 21 through a pipeline. Meanwhile, the high-temperature flue gas generated by the suspension roasting furnace 17 and the hot air displaced in the cyclone cooler 18 return to the preheater 16 to preheat the raw ore powder, and the flue gas generated by the cyclone preheater 16 and the hot blast stove 19 is purified by a flue gas purification device 20, namely a desulfurizing tower, and then is discharged.
The low-sulfur fine ore obtained by the ore roasting desulfurization system is conveyed from the fine ore bin 21 to the second feeder 30 through a pipeline, then is subjected to magnetic separation and iron removal through the dry magnetic separator 31, and a low-sulfur low-iron concentrate mixed material and a magnetic substance are obtained after iron removal, and the magnetic substance is stored as a byproduct.
Sending the low-sulfur low-iron ore concentrate obtained by the dry magnetic separation system into a pulp mixing barrel 36 through a pipeline, adding a certain proportion of water to prepare ore pulp with a liquid-solid ratio of 6:1-10:1, then sending the ore pulp into a stirring leaching tank 37, adding alkali liquor into an alkali liquor storage tank 40, carrying out alkali leaching desiliconization, and filtering the mixture by a No. 2 filter 38 to obtain a low-sulfur low-silicon low-iron ore concentrate finished product and waste alkali liquor; the waste alkali liquor is treated by a waste alkali liquor treatment device 39, namely a glycerol pot, and then returns to an alkali liquor storage tank 40 for circulation use in alkaline leaching desilication.
It should be noted that: in the present invention, the mentioned devices or equipments are all products in the prior art, and all the devices or equipments can be purchased from the market.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention. The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A low-grade bauxite dry-method impurity removal processing system is characterized in that: the system comprises an ore crushing and grinding system, an ore roasting and desulfurizing system, a dry magnetic separation system and a leaching and desiliconizing system which are sequentially connected;
the ore crushing and grinding system comprises a crushing and screening system and a grinding and selecting system; the crushing and screening system is a three-stage screening system consisting of a crusher and a screening machine; the grinding and sorting system comprises a grinding machine (8) and a winnowing machine (9) which are connected in a circulating way; the sieving machine and the ore grinding machine (8) are connected through a belt, and the rear end of the air separation machine is connected with a powder bin (10);
the ore roasting desulfurization system comprises a first feeder (15), a cyclone preheater (16), a suspension roasting furnace (17) and a cyclone cooler (18) which are connected in sequence through pipelines; the first feeder (15) is connected with the powder bin (14); the cyclone preheater (16) is also connected with a flue gas purification device (20), the suspension roasting furnace (17) is connected with a hot blast furnace (19), the hot blast furnace (19) is connected with the flue gas purification device (20), and the cyclone cooler (18) is circularly connected with the cyclone preheater (16) through a pipeline; the rear end of the cyclone cooler (18) is connected with a concentrate bin (21);
the dry magnetic separation system comprises a second feeder (30) and a dry magnetic separator (31) which are connected in sequence;
the leaching and desiliconizing system comprises a size mixing barrel (36), a stirring leaching tank (37) and a filter (38) which are connected in sequence; the filter (38) is also connected with the waste lye treatment device (39), the lye storage tank (40) and the agitation leaching tank (37) in turn through pipelines.
2. The dry impurity removal processing system for low-grade bauxite according to claim 1, characterized in that: the tertiary screening system includes: a primary crusher (2), a primary screening machine (3), a secondary crusher (4), a secondary screening machine (5), a tertiary crusher (6) and a tertiary screening machine (7); the primary crusher (2) is circularly connected with the primary screening machine (3), the secondary crusher (4) is circularly connected with the secondary screening machine (5), and the tertiary crusher (6) is circularly connected with the tertiary screening machine (7).
3. The dry impurity removal processing system for low-grade bauxite according to claim 1, characterized in that: the flue gas purification device (20) is a desulfurizing tower.
4. The dry impurity removal processing system for low-grade bauxite according to claim 1, characterized in that: the waste alkali liquid treatment device (39) is a glycerol pot.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122475890.XU CN217069174U (en) | 2021-10-14 | 2021-10-14 | Dry impurity removal treatment system for low-grade bauxite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122475890.XU CN217069174U (en) | 2021-10-14 | 2021-10-14 | Dry impurity removal treatment system for low-grade bauxite |
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