CN213967132U - Ultra-lean magnetite high-pressure roller mill-relaxation sieve combined pretreatment system - Google Patents
Ultra-lean magnetite high-pressure roller mill-relaxation sieve combined pretreatment system Download PDFInfo
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- CN213967132U CN213967132U CN202022059786.8U CN202022059786U CN213967132U CN 213967132 U CN213967132 U CN 213967132U CN 202022059786 U CN202022059786 U CN 202022059786U CN 213967132 U CN213967132 U CN 213967132U
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Abstract
The utility model relates to a super poor magnetite high pressure roller mill-relaxation sieve combined pretreatment system, include coarse crushing equipment, screening equipment in advance, well garrulous equipment, inspection screening equipment, high pressure roller mill, double-deck relaxation sieve, magnetic pulley, dry-type magnet separator, grit storehouse and ball mill. According to the principle that the ore dressing process can throw early, the characteristics of the double-layer sieve are combined, the materials of the middle grain size fraction are thrown to waste in advance to produce broken stones, and the circulating load of the middle grain size fraction returning to the high-pressure roller mill is reduced. The process is suitable for processing the ore dressing of the ultra-lean magnetite with large comprehensive concentration ratio, and the concentration ratio is reduced from 17 to 6 through the operation of producing broken stones and throwing waste before grinding, so that the ore grinding and magnetic separation cost of the ultra-lean magnetite is greatly reduced.
Description
Technical Field
The utility model relates to a mineral processing technology field, concretely relates to super poor magnetite high pressure roller mill-relaxation sieve combined pretreatment system.
Background
Along with the low grade of the iron ore resources of the magnetite mine, the beneficiation ratio is high, for example, 1200 ten thousand tons of iron ore is processed in a certain magnetite mine in Hebei province, the processing capacity of the magnetite mine reaches the upper limit at present, and the concentrate yield is gradually reduced due to the high beneficiation ratio. In order to solve the problems, ensure the yield of the concentrate and improve the production efficiency, thereby providing a magnetite high-pressure roller mill-pre-screening treatment system before milling and a process thereof.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, provide a super poor magnetite high pressure roller mill-relaxation sieve combined pretreatment system. In order to solve the technical problem, the utility model discloses a following technical scheme:
a high-pressure roller mill-relaxation sieve combined pretreatment system for ultra-lean magnetite ores comprises coarse crushing equipment, pre-screening equipment, intermediate crushing equipment, inspection screening equipment, a high-pressure roller mill, a double-layer relaxation sieve, a magnetic pulley, a dry magnetic separator, a gravel warehouse and a ball mill, wherein a feeding port of the coarse crushing equipment is communicated with a raw ore feeding system, a discharging port of the coarse crushing equipment is communicated with a feeding port of the pre-screening equipment, an oversize discharging port of the pre-screening equipment is communicated with a feeding port of the intermediate crushing equipment, an undersize discharging port of the pre-screening equipment is communicated with a feeding port of the high-pressure roller mill, a discharging port of the intermediate crushing equipment is communicated with a feeding port of the inspection screening equipment, an oversize discharging port of the inspection screening equipment is communicated with a feeding port of the intermediate crushing equipment, an undersize discharging port of the inspection screening equipment is communicated with a feeding port of the high-pressure roller mill, the discharge port of the high-pressure roller mill is communicated with the feeding port of the double-layer relaxation sieve, the upper discharge port of the upper-layer sieve of the double-layer relaxation sieve is communicated with the feeding port of the high-pressure roller mill, the upper discharge port of the lower-layer sieve of the double-layer relaxation sieve is communicated with the feeding port of the magnetic pulley, and the lower discharge port of the lower-layer sieve is communicated with the feeding port of the dry magnetic separator.
Furthermore, a tailing discharge port of the magnetic pulley is communicated with a feeding system of the gravel warehouse, and a concentrate discharge port of the magnetic pulley is communicated with a feeding port of the high-pressure roller mill.
Furthermore, a tailing discharge port of the dry magnetic separator is communicated with a feeding system of a waste dump, and a concentrate discharge port of the dry magnetic separator is communicated with a feeding port of ore grinding equipment.
Further, the ore grinding equipment is a ball mill.
The utility model discloses owing to adopted above technical scheme, have apparent technological effect: (1) according to the principle of 'throwing early throwing' of the mineral separation process and the characteristics of the double-layer sieve, the materials of the middle grain size fraction are thrown to waste in advance to produce broken stones, and the circulating load of the middle grain size fraction returning to the high-pressure roller mill is reduced. (2) The magnetic field force of the magnetic pulley on the coarse-grained materials is not enough to overcome the gravity of the materials, so that the phenomenon that the loss of the secondary particles in waste-throwing metal is large is easily caused, and the materials on the upper-layer screen directly return to the high-pressure roller mill to form a closed circuit without waste throwing. (3) The process is suitable for processing the ore dressing of the ultra-lean magnetite with large comprehensive concentration ratio, and the concentration ratio is reduced from 17 to 6 through the operation of producing broken stones and throwing waste before grinding, so that the ore grinding and magnetic separation cost of the ultra-lean magnetite is greatly reduced. (4) Aiming at the problem of large comprehensive ore dressing ratio, the relaxation sieve is used for closed-circuit screening, and the requirement of high treatment capacity of the fine sieve pores can be met.
Drawings
Fig. 1 is a first schematic structural diagram of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected to the inside of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Example 1
A high-pressure roller mill-relaxation sieve combined pretreatment system for ultra-lean magnetite ores is shown in a figure 1-2 and comprises coarse crushing equipment, pre-screening equipment, intermediate crushing equipment, inspection screening equipment, a high-pressure roller mill, a double-layer relaxation sieve, a magnetic pulley, a dry magnetic separator, a gravel warehouse and a ball mill, wherein a feeding port of the coarse crushing equipment is communicated with a raw ore feeding system, a discharging port of the coarse crushing equipment is communicated with a feeding port of the pre-screening equipment, an upper discharging port of the pre-screening equipment is communicated with a feeding port of the intermediate crushing equipment, a lower discharging port of the pre-screening equipment is communicated with a feeding port of the high-pressure roller mill, a discharging port of the intermediate crushing equipment is communicated with a feeding port of the inspection screening equipment, an upper discharging port of the inspection screening equipment is communicated with a feeding port of the intermediate crushing equipment, a lower discharging port of the inspection screening equipment is communicated with a feeding port of the high-pressure roller mill, the discharge port of the high-pressure roller mill is communicated with the feeding port of the double-layer relaxation sieve, the upper discharge port of the upper-layer sieve of the double-layer relaxation sieve is communicated with the feeding port of the high-pressure roller mill, the upper discharge port of the lower-layer sieve of the double-layer relaxation sieve is communicated with the feeding port of the magnetic pulley, and the lower discharge port of the lower-layer sieve is communicated with the feeding port of the dry magnetic separator.
The tailing discharge port of the magnetic pulley is communicated with a feeding system of a gravel warehouse, and the concentrate discharge port of the magnetic pulley is communicated with a feeding port of the high-pressure roller mill;
the tailings discharge port of the dry magnetic separator is communicated with a feeding system of a waste dump, and the concentrate discharge port of the dry magnetic separator is communicated with a feeding port of ore grinding equipment;
the ore grinding equipment is a ball mill.
The ore in the utility model is subjected to two-stage one-closed crushing process, and pre-screening (45mm) operation is arranged before intermediate crushing; crushed products (-45mm, pre-screened and inspected undersize) enter a high pressure roller mill, and roller mill products (-45mm) enter a double-layer relaxation screen. Returning the product (20-45mm) on the upper screen to the high-pressure roller mill to form a closed circuit; enabling products (5-20mm) on the lower-layer screen to enter a magnetic pulley waste throwing process, enabling waste throwing tailings to serve as broken stones to enter a broken stone product warehouse, and returning waste throwing concentrate to the high-pressure roller mill to form a closed circuit; the minus product (-5mm) enters into dry magnetic separation operation; conveying the dry magnetic separation tailings to a dumping site, and enabling concentrate to enter ore grinding operation;
according to the principle of 'throwing early throwing' of the mineral separation process and the characteristics of the double-layer sieve, the materials of the middle grain size fraction are thrown to waste in advance to produce broken stones, and the circulating load of the middle grain size fraction returning to the high-pressure roller mill is reduced.
The magnetic field force of the magnetic pulley on the coarse-grained materials is not enough to overcome the gravity of the materials, so that the phenomenon that the loss of the secondary particles in waste-throwing metal is large is easily caused, and the materials on the upper-layer screen directly return to the high-pressure roller mill to form a closed circuit without waste throwing.
The process is suitable for processing the ore dressing of the ultra-lean magnetite with large comprehensive concentration ratio, and the concentration ratio is reduced from 17 to 6 through the operation of producing broken stones and throwing waste before grinding, so that the ore grinding and magnetic separation cost of the ultra-lean magnetite is greatly reduced.
Aiming at the problem of large comprehensive ore dressing ratio, the relaxation sieve is used for closed-circuit screening, and the requirement of high treatment capacity of the fine sieve pores can be met.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features of the embodiments described above are not described, but should be considered as within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (4)
1. A combined pretreatment system of a high-pressure roller mill and a relaxation sieve for ultra-lean magnetite ore is characterized in that: the high-pressure magnetic separator comprises coarse crushing equipment, pre-screening equipment, intermediate crushing equipment, inspection screening equipment, a high-pressure roller mill, a double-layer relaxation screen, a magnetic pulley, a dry magnetic separator, a gravel warehouse and a ball mill, wherein a feeding port of the coarse crushing equipment is communicated with a raw ore feeding system, a discharging port of the coarse crushing equipment is communicated with a feeding port of the pre-screening equipment, an oversize discharging port of the pre-screening equipment is communicated with a feeding port of the intermediate crushing equipment, an undersize discharging port of the pre-screening equipment is communicated with a feeding port of the high-pressure roller mill, a discharging port of the intermediate crushing equipment is communicated with a feeding port of the inspection screening equipment, an oversize discharging port of the inspection screening equipment is communicated with a feeding port of the intermediate crushing equipment, an undersize discharging port of the inspection screening equipment is communicated with a feeding port of the high-pressure roller mill, a discharging port of the high-pressure roller mill is communicated with a feeding port of the double-layer relaxation screen, the upper screen discharge port of the upper layer of the double-layer relaxation screen is communicated with the feeding port of the high-pressure roller mill, the upper screen discharge port of the lower layer of the double-layer relaxation screen is communicated with the feeding port of the magnetic pulley, and the lower screen discharge port of the lower layer is communicated with the feeding port of the dry magnetic separator.
2. The combined pretreatment system of the ultra-lean magnetite high-pressure roller mill and the relaxation screen according to claim 1, wherein the combined pretreatment system comprises: and a tailing discharge port of the magnetic pulley is communicated with a feeding system of the gravel warehouse, and a concentrate discharge port of the magnetic pulley is communicated with a feeding port of the high-pressure roller mill.
3. The combined pretreatment system of the ultra-lean magnetite high-pressure roller mill and the relaxation screen according to claim 1, wherein the combined pretreatment system comprises: the tailings discharge port of the dry magnetic separator is communicated with a feeding system of a waste dump, and the concentrate discharge port of the dry magnetic separator is communicated with a feeding port of ore grinding equipment.
4. The combined pretreatment system of the ultra-lean magnetite high-pressure roller mill and the relaxation screen according to claim 3, wherein the combined pretreatment system comprises: the ore grinding equipment is a ball mill.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112170001A (en) * | 2020-09-18 | 2021-01-05 | 滦平建龙矿业有限公司 | Ultra-lean magnetite high-pressure roller mill-relaxation sieve combined pretreatment system and process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112170001A (en) * | 2020-09-18 | 2021-01-05 | 滦平建龙矿业有限公司 | Ultra-lean magnetite high-pressure roller mill-relaxation sieve combined pretreatment system and process |
| CN112170001B (en) * | 2020-09-18 | 2023-12-19 | 滦平建龙矿业有限公司 | Ultra-lean magnetite high-pressure roller mill-relaxation sieve combined pretreatment system and process |
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