CN101913784B - Dry method granulating and waste heat recovering process of blast-furnace slag - Google Patents
Dry method granulating and waste heat recovering process of blast-furnace slag Download PDFInfo
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- CN101913784B CN101913784B CN201010279119.9A CN201010279119A CN101913784B CN 101913784 B CN101913784 B CN 101913784B CN 201010279119 A CN201010279119 A CN 201010279119A CN 101913784 B CN101913784 B CN 101913784B
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- blast
- slag
- furnace slag
- waste heat
- solid particulate
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- 239000002893 slag Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000002918 waste heat Substances 0.000 title claims abstract description 27
- 239000007787 solid Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000011324 bead Substances 0.000 claims abstract description 11
- 230000001788 irregular Effects 0.000 claims abstract description 11
- 238000007908 dry granulation Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract 4
- 238000007599 discharging Methods 0.000 abstract 1
- 238000005469 granulation Methods 0.000 description 8
- 230000003179 granulation Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000796 flavoring agent Substances 0.000 description 2
- 235000019634 flavors Nutrition 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 meanwhile Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- Furnace Details (AREA)
- Processing Of Solid Wastes (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a dry method granulating and waste heat recovering process of blast-furnace slag, relating to a treatment process of the blast-furnace slag and aiming at providing the dry method granulating and waste heat recovering process of the blast-furnace slag, which has low energy consumption, low water consumption, low emission of harmful gas and high waste heat recovery rate. The dry method granulating and waste heat recovering process of the blast-furnace slag comprises the following steps of: (1) discharging the blast-furnace slag from a blast furnace, reducing the thickness of a slag layer and introducing less amount of water so as to allow high-temperature furnace slag to fully contact with the air to quickly expand, cool and form irregular slag beads; (2) quickly throwing the irregular slag beads in a cast way so as to be cooled in the air and form solid granules containing gas; (3) allowing the solid granules to fully contact with a heat exchanger and reducing the temperature of the solid granules to be 150-200DEG C by heat exchange; and (4) utilizing the waste heat absorbed by the heat exchanger and collecting the solid granules subjected to the heat exchange.
Description
Technical field
The present invention relates to a kind of blast furnace slag treating process, particularly relate to a kind of by the technique of liquid high temperature furnace slag employing dry granulation and the method that its waste heat is reclaimed.
Background technology
Blast-furnace slag is a kind of well behaved silicate material, by processing, can be used as the raw material of producing material of construction and chemical fertilizer, meanwhile, liquid high temperature furnace slag temperature is between 1350 ℃ to 1500 ℃, belong to high-grade residual heat resources, there is very high recycling and be worth.The liquid blast-furnace slag of China mainly adopts flush slag quenching at present, and the blast-furnace slag after water-cooled can be used for manufacturing the material of construction such as cement, and the subject matter that water cooling exists has: water consumption is serious, processes 1 ton of slag water consumption per ton; In water cooling process, produce a large amount of hydrogen sulfide and sulfur oxide gas enters atmosphere with water vapour, cause environmental pollution, process slag per ton and produce 800m
3water vapour, wherein H
2s content 19mg/m
3, SO
2content 4.3mg/m
3; The waste heat of slag is not effectively recycled; Grain slag water ratio is high, as cement raw material, still needs drying treatment, need to consume certain energy; Investment and the running cost of system are high, and the blast furnace that day output is 2500 tons will be built two cover flush slag equipment, and construction investment is 40,000,000 yuan of left and right; In flush slag process, the slag that iron content is higher easily sets off an explosion; And the purposes of grain slag is more single.
Shortcoming for blast-furnace slag water cooling; abroad the begun one's study method of dry type chilling granulation blast-furnace slag of 20 century 70s; mainly contain wind quench method and centrifugal granulation method; both first by liquid blast-furnace slag quick crashing, be solidified as small-particle, then adopt technique means to reclaim the method for its waste heat.The wind method of quenching be with high-power granulation blower fan produce high pressure, high velocity air by slag stream dispel, the method for granulation, main drawback is that power consumption is large, equipment bulky complex, floor space are large, investment and working cost high.Centrifugal granulation method is to rely on centrifugal force that the high speed rotating of rotating disk or revolving cup produces by liquid blast furnace slag granulation; although do not need the such highly energy-consuming equipment of granulation blower fan; and the size distribution of grain slag is also less; but at high temperature the mechanical reliability of high speed rotating granulating device is poor, it also needs to be confirmed to the adaptability of load change.
The granulation of liquid blast-furnace slag is all significant to the recycling of the such solid waste of blast-furnace slag and liquid blast-furnace slag waste heat recovery.
Summary of the invention
It is low that the technical problem to be solved in the present invention is to provide a kind of energy consumption, and water consumption is little, and noxious gas emission is little, blast-furnace slag dry granulation and waste heat reclaiming process that waste heat recovery rate is high.
Blast-furnace slag dry granulation of the present invention and waste heat reclaiming process, comprise the steps:
(1) from blast furnace, derive blast-furnace slag, reduce thickness of slag layer, pass into a small amount of water, make high temperature furnace slag fully contact rapid expansion and cooling with air, form irregular slag beads;
(2) by irregular slag beads, the mode by impelling throws away rapidly, it is carried out cooling aloft, forms the solid particulate of gassiness;
(3) solid particulate is fully contacted with interchanger, by heat exchange, make the temperature of solid particulate be reduced to 150 to 200 ℃;
(4) waste heat that heat exchanger absorbs utilizes, and the solid particulate after heat exchanging is collected.
Blast-furnace slag dry granulation of the present invention and waste heat reclaiming process, when solid particulate and interchanger carry out heat exchange, vibrate solid particulate in wherein said step (3).
Blast-furnace slag dry granulation of the present invention and waste heat reclaiming process, the speed of impelling is 3 to 30m/s in wherein said step (2).
Blast-furnace slag dry granulation of the present invention and waste heat reclaiming process, in wherein said step (2), the particle diameter of solid particulate is 2mm to 20mm, temperature is 850 to 950 ℃.
Blast-furnace slag dry granulation of the present invention and waste heat reclaiming process, in wherein said step (1), the temperature of irregular slag beads is 1200 to 1400 ℃.
Blast-furnace slag dry granulation of the present invention and waste heat reclaiming process difference from prior art are that blast-furnace slag dry granulation of the present invention and waste heat reclaiming process make the less solid particulate of the cooling formation particle diameter of slag pearl after air-breathing expansion by the mode of impelling; and obnoxious flavour is wrapped in particle; then by interchanger and solid particulate, carry out heat exchange; because the particle diameter of particle is less; can fully contact with interchanger, make heat exchange efficiency higher.The slag water loss per ton of blast-furnace slag dry granulation of the present invention and waste heat reclaiming process is 15% left and right of flush slag technique; Sulfide emission amount is below 15% of flush slag technique; Equipment investment cost is approximately 1/4th of flush slag technique; In slag, allowing with iron amount is 10 times of flush slag technique, and the possibility of blast reduces greatly, and security of system improves greatly; The solid particulate finally obtaining does not need to be dried, and can directly process, and reduces the cost of subsequent technique; Except as replacing haydite to use as heat insulation, sound-proof material high trade mark cement raw material.
Embodiment
Blast-furnace slag dry granulation of the present invention and waste heat reclaiming process comprise the steps:
(1) from blast furnace, derive blast-furnace slag, reduce thickness of slag layer in expansion slot, pass into a small amount of water, make high temperature furnace slag fully contact rapid expansion and cooling with air, form irregular slag beads, the temperature of irregular slag beads is 1200 to 1400 ℃;
(2) irregular slag beads is flowed in the cylinder of rotation, the mode by impelling throws away rapidly, and the speed of impelling is 3 to 30m/s, it is carried out cooling aloft, the solid particulate of obnoxious flavour has been wrapped up in formation, and the particle diameter of solid particulate is 2mm to 20mm, and temperature is 850 to 950 ℃;
(3) solid particulate is fully contacted with vibratile interchanger, on one side a vibration of heat exchange, make solid particulate distributions uniform heat exchange abundant, by heat exchange, make the temperature of solid particulate be reduced to 150 to 200 ℃;
(4) interchanger is absorbed to remaining thermogenetic high temperature and high pressure steam and reclaim generating, the solid particulate after heat exchanging is collected, pack.
Blast-furnace slag dry granulation of the present invention and waste heat reclaiming process are processed 0.15 ton of slag water consumption per ton; Process slag per ton and produce 150m
3water vapour, wherein H
2s content 0.32mg/m
3, SO
2content 2.7mg/m
3; The whole treatment system of blast-furnace slag dry granulation of the present invention and waste heat reclaiming process is applied to produce daily the blast furnace of 2500 tons, and total investment for construction only needs 10,000,000 yuan of left and right.
This processing method, except processing blast-furnace slag, can also be processed the metallurgical slags such as converter, electric furnace or refining furnace.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention, all should fall in the definite protection domain of the claims in the present invention book.
Claims (1)
1. blast-furnace slag dry granulation and a waste heat reclaiming process, is characterized in that: comprise the steps:
(1) from blast furnace, derive blast-furnace slag, reduce thickness of slag layer, pass into a small amount of water, make high temperature furnace slag fully contact rapid expansion and cooling with air, form irregular slag beads, the temperature of irregular slag beads is 1200 to 1400 ℃;
(2) by irregular slag beads, the mode by impelling throws away rapidly, it is carried out cooling aloft, forms the solid particulate of gassiness, and wherein the speed of impelling is 3 to 30m/s, and the particle diameter of solid particulate is 2mm to 20mm, and temperature is 850 to 950 ℃;
(3) solid particulate is fully contacted with interchanger, by heat exchange, make the temperature of solid particulate be reduced to 150 to 200 ℃, when solid particulate and interchanger carry out heat exchange, solid particulate is vibrated;
(4) waste heat that heat exchanger absorbs utilizes, and the solid particulate after heat exchanging is collected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010279119.9A CN101913784B (en) | 2010-09-13 | 2010-09-13 | Dry method granulating and waste heat recovering process of blast-furnace slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010279119.9A CN101913784B (en) | 2010-09-13 | 2010-09-13 | Dry method granulating and waste heat recovering process of blast-furnace slag |
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| Publication Number | Publication Date |
|---|---|
| CN101913784A CN101913784A (en) | 2010-12-15 |
| CN101913784B true CN101913784B (en) | 2014-05-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268495B (en) * | 2011-07-20 | 2013-01-02 | 北京中冶设备研究设计总院有限公司 | Process technology and equipment for granulating blast-furnace slag and utilizing waste heat |
| CN106986562B (en) * | 2017-03-31 | 2019-10-18 | 四川省劲腾环保建材有限公司 | Extruding dregs porcelain granule production method |
| CN107674929B (en) * | 2017-08-22 | 2019-04-30 | 上海驰春节能科技有限公司 | A kind of fused solution slag particle and the method and its system and device of heat exchange |
| CN110982968A (en) * | 2019-12-29 | 2020-04-10 | 秦皇岛点知汇科技有限公司 | Dry-process slag granulation system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1889820A1 (en) * | 2006-08-09 | 2008-02-20 | Council of Scientific and Industrial Research | An improved process for the production of portland slag cement using granulated blast furnace slag |
| CN101660014A (en) * | 2009-09-24 | 2010-03-03 | 中钢集团鞍山热能研究院有限公司 | Molten blast furnace slag sensible heat recovery method and device |
| CN101749688A (en) * | 2008-12-08 | 2010-06-23 | 姜学仕 | Steam recycle device for utilization and treatment of heat energy of blast furnace slag |
| CN101824499A (en) * | 2010-03-19 | 2010-09-08 | 昆明阳光基业股份有限公司 | Liquid blast furnace slag granulation device and granulation method thereof |
-
2010
- 2010-09-13 CN CN201010279119.9A patent/CN101913784B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1889820A1 (en) * | 2006-08-09 | 2008-02-20 | Council of Scientific and Industrial Research | An improved process for the production of portland slag cement using granulated blast furnace slag |
| CN101749688A (en) * | 2008-12-08 | 2010-06-23 | 姜学仕 | Steam recycle device for utilization and treatment of heat energy of blast furnace slag |
| CN101660014A (en) * | 2009-09-24 | 2010-03-03 | 中钢集团鞍山热能研究院有限公司 | Molten blast furnace slag sensible heat recovery method and device |
| CN101824499A (en) * | 2010-03-19 | 2010-09-08 | 昆明阳光基业股份有限公司 | Liquid blast furnace slag granulation device and granulation method thereof |
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| CN101913784A (en) | 2010-12-15 |
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Address after: 100093 Beijing City, Haidian District Sijiqing Zhen Bei Xin Zhuang Bei soft Shuangxin Kechuang West Garden Building 5 Patentee after: Beijing Luyuan Jingneng Energy Technology Co.,Ltd. Address before: 100083 Beijing University of Science and Technology Beijing Library (Zhang Liying, Haidian District) Patentee before: BEIJING HUIDESHENG ENERGY-SAVING TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20231218 Granted publication date: 20140507 |
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