CN103084266A - Smelting steel tailings micro-powder production method and apparatus thereof - Google Patents
Smelting steel tailings micro-powder production method and apparatus thereof Download PDFInfo
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- CN103084266A CN103084266A CN2011103330781A CN201110333078A CN103084266A CN 103084266 A CN103084266 A CN 103084266A CN 2011103330781 A CN2011103330781 A CN 2011103330781A CN 201110333078 A CN201110333078 A CN 201110333078A CN 103084266 A CN103084266 A CN 103084266A
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- steel tailings
- powder
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- 239000000843 powder Substances 0.000 title claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 238000003723 Smelting Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 230000005291 magnetic effect Effects 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000000227 grinding Methods 0.000 claims abstract description 29
- 238000007885 magnetic separation Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000003068 static effect Effects 0.000 claims abstract description 18
- 238000005303 weighing Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 239000000047 product Substances 0.000 claims description 28
- 239000002994 raw material Substances 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 14
- 235000012054 meals Nutrition 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 5
- 239000011265 semifinished product Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000013467 fragmentation Methods 0.000 claims description 4
- 238000006062 fragmentation reaction Methods 0.000 claims description 4
- 206010013786 Dry skin Diseases 0.000 claims description 3
- 230000001351 cycling effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000004087 circulation Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 2
- 238000003825 pressing Methods 0.000 abstract 1
- 239000012856 weighed raw material Substances 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000009700 powder processing Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Abstract
The present invention relates to the field of steel tailings micro-powder utilization, particularly to a smelting steel tailings micro-powder production method and an apparatus thereof. The method comprises steps such as material feeding and weighing, and is characterized in that weighed raw materials sequentially form process connections with a magnetic device, a static separator, a dynamic powder selection device, a high pressure roller press and a finished product warehouse, wherein a material outlet of the high pressure roller press is connected with a material feeding port of the magnetic device through a bucket elevator so as to achieve multiple material external circulations, multiple material magnetic separations, and efficient roller pressing crushing. Compared with the method and the apparatus in the prior art, the method and the apparatus of the present invention have the following beneficial effects that: 1) with the magnetic device, it can be effectively ensured that magnetic substances can be separated at the same quality; 2) with the static separator, half finished products are primarily separated, such that powder selection efficiency of the follow-up dynamic powder selection device is increased, and the condition that a specific surface area of the finished product is more than or equal to 450 m<2>/kg is met; 3) the high pressure roller press has characteristics of high operation rate and low power consumption so as to substantially improve steel tailings powdering efficiency; and 4) influence on the high pressure roller press service life by the magnetic substances is reduced.
Description
Technical field
The present invention relates to steel tailings micro mist and utilize the field, relate in particular to a kind of production method and device of smelting steel tailings miropowder.
Background technology
At present the slag micro powder processing technology is normally with the advanced row of raw material slag iron removal by magnetic separation, then enters in pre-flour mill grinding and makes the steel-making slag powder semi-finished product, then enter after an iron removal by magnetic separation and carry out whole grinding in desk-top ball mill, finally makes specific area greater than 400m
2The steel-making slag powder product of/kg.In the middle of general magnetic plant, magnetic field is high, magnetic field, both sides is low, change rate of magnetic density reaches 40%, the slag steel iron content rate that magnetic field in the middle of will causing is selected is lower, and the slag steel iron content rate of selecting of both sides is higher, and the slag steel iron content rate that same equipment is selected is inconsistent, and raw meal particle size is better in the above effect of 10mm, relatively poor to the following effect of 10mm, if the bed of material is thicker, effect can be poorer.
Although milling system has simple to operate, system run all right, to the advantage such as the adaptability of material is good, its capacity usage ratio only has 1% left and right, and power consumption is too high, reaches 90kW/h, and large-scale grinding system does not generally adopt.
In recent years, the vertical mill grinding slag is at home and abroad developed faster, and this system flow is simple, and Vertical Mill integrates oven dry, grinding, selects powder.Mill efficiency is higher, and unit power consumption is low, and drying capacity is strong.But because metals content impurity in the slag raw material is higher, wherein iron exists in the slag raw material with forms such as metallic iron, iron oxide, ferrous oxides respectively, also contains some non-ferromagnetic type impurity in slag, not easy-clear.Must remove as far as possible in feeding and grinding process for the metal impurities in the slag raw material, otherwise, can make equipment attrition serious, normal operating is affected and even can't produces, and the quality of slag micro powder product also can be affected.In vertical mill system, the grinding charge material on mill by crush and grind repeatedly for several times, through operation after a while, enrichment phenomenon can appear in the ferrous contaminants in the grinding charge material on mill, ferrous contaminants enrichment meeting on mill is sharply accelerated equipment attrition, power consumption increases, and finally needs to stop to remove, and production efficiency is low and work situation is poor.
Summary of the invention
The purpose of this invention is to provide a kind of production method and device of smelting steel tailings miropowder, overcome the deficiencies in the prior art, for the material characteristic of smelting steel tailings, adopt a novel device combination of cover, produce specific area greater than 450m
2The high-quality slag micro powder product of/kg.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of production method of smelting steel tailings miropowder comprises feed and the step of weighing, and its postorder also comprises magnetic separation, dry static rank, dynamic classification, roller crushing, finished product collection step successively, and each step parameter is controlled as follows:
1) magnetic separation, employing is with the magnetisable material in magnetic machine separation of steel tailings, described magnetic field with the magnetic machine is evenly distributed on conveyor belt surface, on width, rate of change is no more than 10%, iron content rate before assurance is broken in raw material≤2%, along with reducing and the magnetic separation that repeatedly circulates of raw meal particle size, can guarantee the iron content rate≤1% in finished product;
2) dry static rank, the steel tailings after magnetic separation enters the static separation device, and material carries out classification after by 700 ℃ of-800 ℃ of thermal current dryings and selects powder, and the steel tailings is divided into specific area 〉=200m
2/ kg than fine powder and specific area≤200m
2Meal one and the specific area 〉=450m of/kg
2Three kinds of grade semi-finished product of the fine powder of/kg, this step can improve the dynamic grinding efficiency of postorder;
3) dynamic classification is with above-mentioned steps 2) in separate send into dynamic powder concentrator than fine powder, further be separated into specific area≤450m
2Meal two and the specific area 〉=450m of/kg
2The fine powder of/kg, this size indicator can be according to the customer requirements adjustment;
4) roller crushing, with above-mentioned steps 2) and step 3) in the meal one separated send into high pressure roll press with meal two, two of high pressure roll press reverse rotation grinding rollers carry out roller crushing to material, and the material after fragmentation is carried with the raw material that replenishes through bucket from the high pressure roll press bottom and got back to band magnetic machine repeating step 1) to step 4) cycling;
5) finished product is collected, with above-mentioned steps 2) and step 3) in separate the specific area 〉=450m that meets the finished product requirement
2The fine powder of/kg is collected warehouse for finished product as micro powder product.
Realize the process units of a kind of smelting steel tailings miropowder of aforementioned production method, comprise feed hopper, raw material scale, be connected with band magnetic machine, static separation device, dynamic powder concentrator, high pressure roll press, finished bin technique successively after the raw material scale, the high pressure roll press discharging opening is also carried with being with magnetic machine feeding port through bucket and being connected.
Described conveyor belt surface magnetic field with the magnetic machine is even, and on width, change rate of magnetic density is no more than 10%.
Specific area 〉=the 450m of the finished product index of described static separation device and dynamic powder concentrator
2/ kg.
The grinding pressure of two reverse rotation grinding rollers of described high pressure roll press is not less than 12500KN.
Compared with prior art, the invention has the beneficial effects as follows:
1) carry out magnetic separation aloft after band magnetic function is thrown the following material of 10mm, effectively guarantee to isolate magnetisable material with identical grade, the magnetic separation effect is very good.
2) the static separation device makes semi-finished product carry out initial gross separation according to granularity requirements, can improve the grinding efficiency of postorder dynamic powder concentrator, thereby has guaranteed simultaneously the quality of micro mist finished product enhancing productivity, and realizes the specific area index 〉=450m of finished product
2/ kg.
3) high pressure roll press counter-rotates rolling of grinding rollers by two, realizes the effect of efficient grinding fragmentation, and running rate is high, and for ease of maintenaince, low energy consumption has improved the efficient of slag efflorescence greatly.
4) by adopting repeatedly outer circulation of material, repeatedly magnetic separation mode, reduce the gathering of magnetisable material in high pressure roll press, in the service life of having improved high pressure roll press, satisfied simultaneously iron content index request in product.
Description of drawings
Fig. 1 is technique for producing miropowder schematic flow sheet of the present invention;
Fig. 2 is that apparatus of the present invention are arranged block diagram;
Fig. 3 is high pressure roll press smashing principle schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
See Fig. 1, it is smelting steel tailings miropowder technological process of production schematic diagram of the present invention, this production method comprises feed and the step of weighing, its postorder also comprises magnetic separation, dry static rank, dynamic classification, roller crushing, finished product collection step successively, supplied materials is the steel tailings after preliminary treatment, iron content rate≤5%, to produce 500000 tons of micro mist production lines per year as example, each step parameter is controlled as follows:
1) magnetic separation, employing is with the magnetisable material in magnetic machine separation of steel tailings, band magnetic machine is patented product (patent No. ZL 200920014727.x), this magnetic field with the magnetic machine is evenly distributed on conveyor belt surface, on width, rate of change is no more than 10%, and carry out magnetic separation aloft after the following material of 10mm being thrown, can not be subjected to the thickness of feed layer factor to affect the magnetic separation effect, iron content rate before assurance is broken in raw material≤2%, along with reducing and the magnetic separation that repeatedly circulates of raw meal particle size, can guarantee the iron content rate≤1% in finished product;
Adapt to slag particle diameter 0～10mm, flow process feeding coal 70t/h carries bandwidth 1200mm,
Cold conditions power: exciting power 14KW;
Gradient strength: main magnetic is E1=1400GS
Secondary magnetic is E2=1100GS
2) dry static rank, the steel tailings after magnetic separation enters the static separation device, and material carries out classification after by 700 ℃ of-800 ℃ of thermal current dryings and selects powder, and the steel tailings is divided into specific area 〉=200m
2/ kg than fine powder and specific area≤200m
2Meal one and the specific area 〉=450m of/kg
2Three kinds of grade semi-finished product of the fine powder of/kg, this step can improve the dynamic grinding efficiency of postorder;
3) dynamic classification is with above-mentioned steps 2) in separate send into dynamic powder concentrator than fine powder, further be separated into specific area≤450m
2Meal two and the specific area 〉=450m of/kg
2The fine powder of/kg, this size indicator can be according to the customer requirements adjustment, and this dynamic powder concentrator guide vane (patent No. ZL 200720185095.4) can obviously improve grinding efficiency;
4) roller crushing, with above-mentioned steps 2) and step 3) in the meal one separated send into high pressure roll press with meal two, two reverse rotation grinding rollers of high pressure roll press carry out roller crushing to material, material after fragmentation is carried with the raw material that replenishes through bucket from the high pressure roll press bottom and is got back to band magnetic machine repeating step 1) to step 4) cycling, according to the quality condition of raw material, every batch materials circulation 1-6 time can be fully levigate;
This high pressure roll press production capacity: 70t/h
Roller footpath: 1,740 millimeter
Roller is wide: 1,000 millimeter
Material passes through granularity: 0-10mm
The grinding pressure of two reverse rotation grinding rollers of high pressure roll press is not less than 12500KN.
5) finished product is collected, with above-mentioned steps 2) and step 3) in separate the specific area 〉=450m that meets the finished product requirement
2The fine powder of/kg is collected warehouse for finished product as micro powder product.
See Fig. 2, the process units that is the present invention's a kind of smelting steel tailings miropowder of realizing aforementioned production method is arranged block diagram, comprise feed hopper, raw material scale, be connected with band magnetic machine, static separation device, dynamic powder concentrator, high pressure roll press, finished bin technique successively after the raw material scale, the high pressure roll press discharging opening is also carried with being with magnetic machine feeding port through bucket and being connected.
Conveyor belt surface magnetic field with the magnetic machine is even, and on width, change rate of magnetic density is no more than 10%.
Specific area 〉=the 450m of the finished product index of static separation device and dynamic powder concentrator
2/ kg.
Seeing Fig. 3, is high pressure roll press smashing principle schematic diagram, and two reverse rotation grinding rollers of high pressure roll press are realized rolling the crushing grinding effect, and this structure energy consumption is low, and crush efficiency is high.
Technological process of the present invention has the advantages such as mill efficiency is high, good energy-conserving effect, high, the newly-increased waste water of operation rate is few, operating cost is low.By adopting repeatedly outer circulation of material, repeatedly magnetic separation mode, can obviously reduce the gathering of magnetisable material in grinding machine, improve service life and the crushing efficiency of grinding machine.
Claims (5)
1. the production method of a smelting steel tailings miropowder, comprise feed and the step of weighing, and it is characterized in that, its postorder also comprises magnetic separation, dry static rank, dynamic classification, roller crushing, finished product collection step successively, and each step parameter is controlled as follows:
1) magnetic separation, employing is with the magnetisable material in magnetic machine separation of steel tailings, described magnetic field with the magnetic machine is evenly distributed on conveyor belt surface, on width, rate of change is no more than 10%, iron content rate before assurance is broken in raw material≤2%, along with reducing and the magnetic separation that repeatedly circulates of raw meal particle size, can guarantee the iron content rate≤1% in finished product;
2) dry static rank, the steel tailings after magnetic separation enters the static separation device, and material carries out classification after by 700 ℃ of-800 ℃ of thermal current dryings and selects powder, and the steel tailings is divided into specific area 〉=200m
2/ kg than fine powder and specific area≤200m
2Meal one and the specific area 〉=450m of/kg
2Three kinds of grade semi-finished product of the fine powder of/kg, this step can improve the dynamic grinding efficiency of postorder;
3) dynamic classification is with above-mentioned steps 2) in separate send into dynamic powder concentrator than fine powder, further be separated into specific area≤450m
2Meal two and the specific area 〉=450m of/kg
2The fine powder of/kg, this size indicator can be according to the customer requirements adjustment;
4) roller crushing, with above-mentioned steps 2) and step 3) in the meal one separated send into high pressure roll press with meal two, two of high pressure roll press reverse rotation grinding rollers carry out roller crushing to material, and the material after fragmentation is carried with the raw material that replenishes through bucket from the high pressure roll press bottom and got back to band magnetic machine repeating step 1) to step 4) cycling;
5) finished product is collected, with above-mentioned steps 2) and step 3) in separate the specific area 〉=450m that meets the finished product requirement
2The fine powder of/kg is collected warehouse for finished product as micro powder product.
2. realize the process units of a kind of smelting steel tailings miropowder of the described production method of claim 1, comprise feed hopper, raw material scale, it is characterized in that, be connected with band magnetic machine, static separation device, dynamic powder concentrator, high pressure roll press, finished bin technique successively after the raw material scale, the high pressure roll press discharging opening is also carried with being with magnetic machine feeding port through bucket and being connected.
3. the process units of a kind of smelting steel tailings miropowder according to claim 2, is characterized in that, described conveyor belt surface magnetic field with the magnetic machine is even, and on width, change rate of magnetic density is no more than 10%.
4. the process units of a kind of smelting steel tailings miropowder according to claim 2, is characterized in that, the specific area 〉=450m of the finished product index of described static separation device and dynamic powder concentrator
2/ kg.
5. the process units of a kind of smelting steel tailings miropowder according to claim 2, is characterized in that, the grinding pressure of two reverse rotation grinding rollers of described high pressure roll press is not less than 12500KN.
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| CN201110333078.1A CN103084266B (en) | 2011-10-28 | 2011-10-28 | A kind of production method of smelting steel tailings miropowder and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103555867A (en) * | 2013-10-31 | 2014-02-05 | 中冶南方工程技术有限公司 | System and method for converting steel slag into renewable resources |
| CN105312142A (en) * | 2015-11-26 | 2016-02-10 | 鞍山钢铁集团公司矿渣开发公司 | Method for final powder grinding of metallurgical steel slag and production line thereof |
| CN109055634A (en) * | 2018-06-22 | 2018-12-21 | 深圳市颐泰中和科技有限公司 | Separate the method and separation system of reactive powder and inert powder in slag micro powder |
| CN117696174A (en) * | 2024-02-04 | 2024-03-15 | 哈尔滨商业大学 | Rice milling device for rice flour processing and using method thereof |
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| CN109055634B (en) * | 2018-06-22 | 2019-11-22 | 深圳市颐泰中和科技有限公司 | Separate the method and separation system of reactive powder and inert powder in slag micro powder |
| CN117696174A (en) * | 2024-02-04 | 2024-03-15 | 哈尔滨商业大学 | Rice milling device for rice flour processing and using method thereof |
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| CN103084266B (en) | 2016-05-18 |
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Owner name: CINDER COMPANY OF ANSHAN IRON + STEEL GROUP CORPOR Free format text: FORMER OWNER: ANSTEEL ENGINEERING TECHNOLOGY CORPORATION LIMITED Effective date: 20150129 Owner name: ANSTEEL ENGINEERING TECHNOLOGY CORPORATION LIMITED Free format text: FORMER OWNER: ANSHAN STEEL COMPANY LIMITED Effective date: 20150129 |
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Inventor after: Su Xingwen Inventor after: Song Wu Inventor after: Gu Jinsheng Inventor after: Li Yi Inventor after: Li Xiaoyang Inventor after: Pan Jinhui Inventor after: Zhang Zhibiao Inventor after: Cui Jiuxiao Inventor after: Cao Xin Inventor before: Su Xingwen Inventor before: Feng Zhanli Inventor before: Gu Jinsheng Inventor before: Li Xiaoyang Inventor before: Song Wu Inventor before: Wu Zhenguo Inventor before: Zeng Tao Inventor before: Zhou Wei |
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Free format text: CORRECT: INVENTOR; FROM: SU XINGWEN FENG ZHANLI GU JINSHENG LI XIAOYANG SONG WU WU ZHENGUO CENG TAO ZHOU WEI TO: SU XINGWEN SONG WU GU JINSHENG LI YI LI XIAOYANG PAN JINHUI ZHANG ZHIBIAO CUI JIUXIAO CAO XIN |
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Effective date of registration: 20150129 Address after: 114000, Anshan iron and steel plant in Liaoning Province Applicant after: SLAG DEVELOPMENT COMPANY OF ANSHAN IRON AND STEEL GROUP CORPORATION Applicant after: Ansteel Engineering Technology Corporation Limited Address before: 114000 Tiexi District, Anshan City, No. 1 Ring Road, No. Applicant before: Ansteel Engineering Technology Corporation Limited Applicant before: Anshan Steel Company Limited |
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Effective date of registration: 20180808 Address after: 114000 Anshan Iron and steel plant, Tiexi District, Anshan, Liaoning Co-patentee after: Ansteel Engineering Technology Corporation Limited Patentee after: Angang Green Resources Technology Co., Ltd. Address before: 114000 Liaoning Anshan iron and steel plant area Co-patentee before: Ansteel Engineering Technology Corporation Limited Patentee before: SLAG DEVELOPMENT COMPANY OF ANSHAN IRON AND STEEL GROUP CORPORATION |