CN105435939A - Grinding and separation system of low-strength reduced iron - Google Patents
Grinding and separation system of low-strength reduced iron Download PDFInfo
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- CN105435939A CN105435939A CN201511022404.1A CN201511022404A CN105435939A CN 105435939 A CN105435939 A CN 105435939A CN 201511022404 A CN201511022404 A CN 201511022404A CN 105435939 A CN105435939 A CN 105435939A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a grinding and separation system of low-strength reduced iron, and belongs to the field of iron powder processing. The grinding and separation system sequentially comprises a crushing mechanism, a slurry making device and a first grinding mechanism, wherein a first magnetic separation mechanism is arranged at the lower stream of the first grinding mechanism, and is communicated with a spiral classifier and a tailing pond; a second grinding mechanism and a middling ore pond are arranged at the lower stream of the spiral classifier; a second magnetic separation mechanism is arranged at the lower stream of the second grinding mechanism; a shaking table is arranged at the lower stream of the second magnetic separation mechanism, and is communicated with the middling ore pond and a dehydration mechanism; a drying mechanism and a packing mechanism are arranged at the lower stream of the dehydration mechanism; and the middling ore pond is provided with a discharge port communicated with the second grinding mechanism. The grinding and separation system adopts a magnetic separation and gravity separation and classification united method, so that the content of impurities in iron powder is reduced to the greatest extent, and high-quality iron powder with the content of iron being above 95% can be obtained.
Description
Technical field
The present invention relates to iron powder and manufacture field, refer to that a kind of mill of low-intensity reduced iron selects system especially.
Background technology
The preparation method of current iron-based powder mainly comprises: atomization, electrolysis, chemical method, polishing and steel powder processing method.
Traditional grinding is the shock relying on ball mill steel ball, produces impulsive force and shearing force, makes the material particles be polished rupture, be out of shape, thus make raw meal particle size grind thinner and thinner, obtain corresponding powder.
There is one to be commonly called as " sponge iron " for low-intensity coal based ferrum redactum, in mini porous structures, if produce iron-based powder as raw material, because the mechanical strength of raw material own is lower, then no longer need powerful impulsive force and shearing force to make it fracture during grinding.But there is no suitable production equipment.
Summary of the invention
The mill that the present invention proposes a kind of low-intensity reduced iron selects system, and it adopts the way of magnetic separation, gravity treatment, graded combination, reduces iron powder impurity content to greatest extent, can obtain the high-quality iron powder of iron content more than 95%.
Technical scheme of the present invention is achieved in that
The mill of low-intensity reduced iron selects a system, and it comprises successively according to Raw material processing order:
Crushing mechanism, in order to be broken for particle by low-intensity reduced iron;
Pulp making device, is mixed into ore pulp by low-intensity reduced iron particle and water;
First grinding mechanism, its downstream is provided with the first magnetic separation mechanism, and described first magnetic separation mechanism is communicated to spiral classifier and tailing pit respectively;
Described spiral classifier downstream is provided with the second grinding mechanism and chats pond;
Described second grinding mechanism downstream is provided with the second magnetic separation mechanism;
Described second magnetic separation mechanism downstream is provided with shaking table;
Described shaking table is communicated to chats pond and dewatering device respectively, and described dewatering device downstream is provided with drying mechanism and package mechanism;
Described chats pond is provided with the discharging opening that is communicated to the second grinding mechanism.
In technique scheme, described crushing mechanism is jaw crusher.
In technique scheme, described first magnetic separation mechanism is two-stage magnetic separation mechanism, comprises 700 Gauss's magnetic separators and 1200 Gauss's magnetic separators;
The charging aperture of described 700 Gauss's magnetic separators connects the first grinding mechanism, and discharging opening is connected to described spiral classifier, and tailing mouth is connected to 1200 Gauss's magnetic separators;
The discharging opening of described 1200 Gauss's magnetic separators is connected to described spiral classifier, and its tailing mouth is communicated to tailing pond.
During concrete production, first the iron powder through the first grinding mechanism grinding enters 700 Gauss's magnetic separators, and the iron powder magneticly elected enters described spiral classifier; And the mine tailing of 700 Gauss's magnetic separators enters 1200 Gauss's magnetic separators, the iron powder again magneticly elected also enters spiral classifier and 700 Gauss's iron powders converge; The mine tailing of described 1200 Gauss's magnetic separators passes into tailing pit.
In technique scheme, the second magnetic separation mechanism is 400 Gauss's magnetic separators.
In technique scheme, described shaking table downstream is also communicated to the 3rd grinding mechanism;
Described 3rd grinding mechanism downstream arranges two-stage screw rinsing mechanism, dewatering device, drying mechanism.
In technique scheme, described first grinding mechanism, the second grinding mechanism, the 3rd grinding mechanism all preferably adopt ball mill.
In technique scheme, described crushing mechanism downstream can also arrange the feed bin storing low-intensity reduced iron particle.
Compared with prior art, the present invention be directed to the equipment that low-intensity reduced iron realizes scum separation.The degree of metalization of low-intensity sponge iron is more than 90%, but iron crystal grain does not have Overgrowth, and therefore intensity is low, legibility is broken, and therefore ball mill type selecting does not need too large, reduces equipment investment on the one hand, cuts down finished cost on the other hand.
In the process that the present invention purifies at iron powder, adopt the way of magnetic separation, gravity treatment, graded combination, reduce iron powder impurity content to greatest extent, the high-quality iron powder of iron content more than 95% can be obtained.
The present invention adopts three sections of ball milling designs, and each section of ball mill is divided the work clearly, worked in coordination, can according to the flexible adjusting process flow process of material quality situation.Improve the adaptability of technological process to raw material on the one hand, reduce production cost on the other hand.
The present invention presses iron powder grade height, and being designed with two kinds of specification iron powders, is the high-quality iron powder of iron content more than 95% respectively, and the chemical industry iron powder of iron content more than 80%, improves metal and iron powder recovery rate.
Chats pond enters second segment ball milling separately again, repeatedly grinds choosing, also can further improve chemical industry iron powder iron powder quality, increases chemical industry iron powder added value.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the frame structure schematic diagram that low-intensity reduced iron of the present invention mill selects system.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the mill of low-intensity reduced iron of the present invention selects system, and its structure comprises successively according to Raw material processing order:
Crushing mechanism, in order to be broken for particle by low-intensity reduced iron;
Pulp making device, is mixed into ore pulp by low-intensity reduced iron particle and water;
First grinding mechanism, its downstream is provided with the first magnetic separation mechanism, and described first magnetic separation mechanism is communicated to spiral classifier and tailing pit respectively;
Described spiral classifier downstream is provided with the second grinding mechanism and chats pond;
Described second grinding mechanism downstream is provided with the second magnetic separation mechanism;
Described second magnetic separation mechanism downstream is provided with shaking table;
Described shaking table is communicated to chats pond and dewatering device respectively, and described dewatering device downstream is provided with drying mechanism and package mechanism;
Described chats pond is provided with the discharging opening that is communicated to the second grinding mechanism.
In technique scheme, described crushing mechanism is jaw crusher.
In technique scheme, described first magnetic separation mechanism is two-stage magnetic separation mechanism, comprises 700 Gauss's magnetic separators and 1200 Gauss's magnetic separators;
The charging aperture of described 700 Gauss's magnetic separators connects the first grinding mechanism, and discharging opening is connected to described spiral classifier, and tailing mouth is connected to 1200 Gauss's magnetic separators;
The discharging opening of described 1200 Gauss's magnetic separators is connected to described spiral classifier, and its tailing mouth is communicated to tailing pond.
During concrete production, first the iron powder through the first grinding mechanism grinding enters 700 Gauss's magnetic separators, and the iron powder magneticly elected enters described spiral classifier; And the mine tailing of 700 Gauss's magnetic separators enters 1200 Gauss's magnetic separators, the iron powder again magneticly elected also enters spiral classifier and 700 Gauss's iron powders converge; The mine tailing of described 1200 Gauss's magnetic separators passes into tailing pit.
In technique scheme, the second magnetic separation mechanism is 400 Gauss's magnetic separators.
In technique scheme, described shaking table downstream is also communicated to the 3rd grinding mechanism;
Described 3rd grinding mechanism downstream arranges two-stage screw rinsing mechanism, dewatering device, drying mechanism.
In technique scheme, described first grinding mechanism, the second grinding mechanism, the 3rd grinding mechanism all preferably adopt ball mill.
In technique scheme, described crushing mechanism downstream can also arrange the feed bin storing low-intensity reduced iron particle.
The concrete production process of this system is as follows:
First low-intensity reduced iron adopts a jaw crusher to be crushed to below 50mm, loads in the feed bin of sealing for subsequent use.The low-intensity reduced iron particle being crushed to suitable particle size enters pulp making device, in pulp making device, be fully mixed to get the ore pulp that concentration is about 10% with water.Ore pulp enters in the first grinding mechanism and grinds 10 ~ 20 minutes, and low-intensity reduced iron particle elementary solution is broken.Separate broken after low-intensity reduced iron enter 700 Gauss's magnetic separators, the iron powder magneticly elected enters spiral classifier, and mine tailing enters 1200 Gauss's magnetic separators and scans.The iron powder of 1200 Gauss's magnetic separator magnetic separation also enters spiral classifier and 700 Gauss's iron powders converge, and its mine tailing enters tailing pit and throws tail.
Iron powder enters spiral classifier rinsing, concentrated after, from screw classifying chain-drive section out, then after rinsing pulping with clear water, enter the second grinding mechanism.The mine tailing that spiral classifier afterbody is separated enters chats pond, pending.Iron powder is purified grind 15 ~ 20 minutes in the second grinding mechanism after further.The iron powder ground from the second grinding mechanism out after, adopt 400 Gauss's magnetic separators to sort, on the iron powder selected, shaking table carries out rinsing upgrading.Mine tailing enters chats pond, pending.Iron powder after rinsing upgrading, can obtain the iron powder product of grade more than 95% on shaking table, through dehydration, dries, just can sell after packing, or enter next procedure and carry out deep processing.
Mine tailing iron content in chats pond is higher, after more than 80%, picking up, dewater, drying, can be used as chemical industry iron powder and sells; Also can return second segment ball milling, carry out upgrading and increase iron powder recovery rate.
To reduce the content of its hydrochloric acid insoluble substance of iron powder that shaking table is received further, the 3rd grinding mechanism can be entered and process further.Iron powder after 3rd grinding mechanism grinds, then after two-stage screw rinsing, removal of impurities, dehydration, oven dry, the iron powder of standard-required can be met.Its hydrochloric acid insoluble substance content of iron powder through processing can be reduced to less than 0.3%.
Compared with prior art, the present invention be directed to the equipment that low-intensity reduced iron realizes scum separation.The degree of metalization of low-intensity sponge iron is more than 90%, but iron crystal grain does not have Overgrowth, and therefore intensity is low, legibility is broken, and therefore ball mill type selecting does not need too large, reduces equipment investment on the one hand, cuts down finished cost on the other hand.
In the process that the present invention purifies at iron powder, adopt the way of magnetic separation, gravity treatment, graded combination, reduce iron powder impurity content to greatest extent, the high-quality iron powder of iron content more than 95% can be obtained.
The present invention adopts two sections/tri-sections ball milling designs, and each section of ball mill is divided the work clearly, worked in coordination, can according to the flexible adjusting process flow process of material quality situation.Improve the adaptability of technological process to raw material on the one hand, reduce production cost on the other hand.
The present invention presses iron powder grade height, and being designed with two kinds of specification iron powders, is the high-quality iron powder of iron content more than 95% respectively, and the chemical industry iron powder of iron content more than 80%, improves metal and iron powder recovery rate.
Chats pond material enters second segment ball milling separately again, repeatedly grinds choosing, also can further improve chemical industry iron powder iron powder quality, increases chemical industry iron powder added value.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the mill of low-intensity reduced iron selects a system, it is characterized in that, comprises successively according to Raw material processing order:
Crushing mechanism, in order to be broken for particle by low-intensity reduced iron;
Pulp making device, is mixed into ore pulp by low-intensity reduced iron particle and water;
First grinding mechanism, its downstream is provided with the first magnetic separation mechanism, and described first magnetic separation mechanism is communicated to spiral classifier and tailing pit respectively;
Described spiral classifier downstream is provided with the second grinding mechanism and chats pond;
Described second grinding mechanism downstream is provided with the second magnetic separation mechanism;
Described second magnetic separation mechanism downstream is provided with shaking table;
Described shaking table is communicated to chats pond and dewatering device respectively, and described dewatering device downstream is provided with drying mechanism and package mechanism;
Described chats pond is provided with the discharging opening that is communicated to the second grinding mechanism.
2. the mill of low-intensity reduced iron according to claim 1 selects system, it is characterized in that:
Described crushing mechanism is jaw crusher.
3. the mill of low-intensity reduced iron according to claim 1 selects system, it is characterized in that:
Described first magnetic separation mechanism is two-stage magnetic separation mechanism, comprises 700 Gauss's magnetic separators and 1200 Gauss's magnetic separators;
The charging aperture of described 700 Gauss's magnetic separators connects the first grinding mechanism, and discharging opening is connected to described spiral classifier, and tailing mouth is connected to 1200 Gauss's magnetic separators;
The discharging opening of described 1200 Gauss's magnetic separators is connected to described spiral classifier, and its tailing mouth is communicated to tailing pond.
4. the mill of low-intensity reduced iron according to claim 1 selects system, it is characterized in that:
Second magnetic separation mechanism is 400 Gauss's magnetic separators.
5. the mill of low-intensity reduced iron according to claim 1 selects system, it is characterized in that:
Described shaking table downstream is also communicated to the 3rd grinding mechanism;
Described 3rd grinding mechanism downstream arranges two-stage screw rinsing mechanism, and is communicated to dewatering device, drying mechanism, package mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511022404.1A CN105435939B (en) | 2015-12-31 | 2015-12-31 | A kind of mill of low-intensity reduced iron selects system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511022404.1A CN105435939B (en) | 2015-12-31 | 2015-12-31 | A kind of mill of low-intensity reduced iron selects system |
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| CN105435939A true CN105435939A (en) | 2016-03-30 |
| CN105435939B CN105435939B (en) | 2018-04-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3905556A (en) * | 1974-05-20 | 1975-09-16 | Air Prod & Chem | Method and apparatus for recovery of metals from scrap |
| CN101890394A (en) * | 2009-05-23 | 2010-11-24 | 魏子贺 | Ore dressing process for weakly magnetic iron ore |
| CN102642027A (en) * | 2012-04-11 | 2012-08-22 | 莱芜钢铁集团有限公司 | Process for producing reduced iron powder |
| CN104190950A (en) * | 2014-07-25 | 2014-12-10 | 玉溪大红山矿业有限公司 | Iron powder production process |
| CN205462695U (en) * | 2015-12-31 | 2016-08-17 | 玉溪大红山矿业有限公司 | Mill of low -intensity reduced iron selects system |
-
2015
- 2015-12-31 CN CN201511022404.1A patent/CN105435939B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3905556A (en) * | 1974-05-20 | 1975-09-16 | Air Prod & Chem | Method and apparatus for recovery of metals from scrap |
| CN101890394A (en) * | 2009-05-23 | 2010-11-24 | 魏子贺 | Ore dressing process for weakly magnetic iron ore |
| CN102642027A (en) * | 2012-04-11 | 2012-08-22 | 莱芜钢铁集团有限公司 | Process for producing reduced iron powder |
| CN104190950A (en) * | 2014-07-25 | 2014-12-10 | 玉溪大红山矿业有限公司 | Iron powder production process |
| CN205462695U (en) * | 2015-12-31 | 2016-08-17 | 玉溪大红山矿业有限公司 | Mill of low -intensity reduced iron selects system |
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| CN105435939B (en) | 2018-04-27 |
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