CN102786963A - Method for improving high-temperature metallurgical property of coke - Google Patents
Method for improving high-temperature metallurgical property of coke Download PDFInfo
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- CN102786963A CN102786963A CN2012102730654A CN201210273065A CN102786963A CN 102786963 A CN102786963 A CN 102786963A CN 2012102730654 A CN2012102730654 A CN 2012102730654A CN 201210273065 A CN201210273065 A CN 201210273065A CN 102786963 A CN102786963 A CN 102786963A
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- coke
- boric acid
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Abstract
The invention provides a method for improving the high-temperature metallurgical property of coke. The method is characterized in that on the condition that 1-2.5 tons of water are consumed by per ton of coke, a boric acid solution with the mass concentration of 0.5-1.5 percent is sprayed on the coke at the temperature of 950-1050 DEG C at a time at the flow of 1,260 m<3>/h to quench the coke for 110-160 seconds, so as to enable the temperature of the coke to be reduced to 50-80 DEC G. Due to the adoption of the method, not only the thermal strength index of the coke is greatly improved, but also the cold strength index of the coke is improved, and at the same time, the high-temperature alkali-resistance of the coke is improved. Moreover, the shortcomings that boric acid is difficult to fuse and the consumption is high are overcome, the optimization of technological parameters is realized, and the high-temperature metallurgical property of coke can be improved to the utmost through the boric acid.
Description
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Technical field
The present invention relates to a kind of method of improving high temperature metallurgical properties of coke, belong to technical field of coal chemical industry.
Background technology
The fast development of Iron industry characterizes coke performance in blast furnace fine or not reactive CRI of high temperature metallurgical properties hot strength and post-reaction strength CSR index, and cold strength shatter strength M
40With abrasive wear resistance M
10Index has more and more received ironmaking worker's great attention; Especially coke reactivity and post-reaction strength are especially as the important indicator of estimating coke metallurgical performance quality, and the improvement of this index of metallurgical coke has important effect to promoting large blast furnace strengthening smelting, stable furnace condition.Years of researches are the result show; The high temperature metallurgical properties of coke index depends on the quality of coking coal quality to a great extent; But the influence that changed by the coal market; The buying day of high-quality caking coal is difficulty more, only relies on to improve the coal blending structure to improve the difficulty of high temperature metallurgical properties of coke increasing.Show through production practice; Conditions of blast furnace is not normal, outside the Pass having with the coal resource quality, also handles closely related with the coke postorder; Under the situation that externally resources supplIes is very severe; How effectively to utilize other technique means to improve the high temperature metallurgical properties of coke index, reduce the coke production cost simultaneously, seem particularly important.
Summary of the invention
The object of the present invention is to provide a kind of method of improving high temperature metallurgical properties of coke.
The present invention is to provide a kind of like this method of improving high temperature metallurgical properties of coke, it is characterized in that:, be 0.5～1.5% boric acid water with mass concentration, with 1260m by the amount of 1～2.5 ton of burnt water of ton
3The flow of/h, 110～160 seconds quenching time, once spray on temperature is 1000 ± 50 ℃ coke, make coke be cooled to 50～80 ℃, promptly accomplish the quenching operation.
Said quenching operation is accomplished in conventional coke quenching tower.
Said spray is to accomplish through the shower group that is installed in the coke quenching tower top.
Said mass concentration is that 0.5～1.5%% boric acid water obtains through following method: boric acid is invested in the coke quenching tower backwater ditch, together gets into the coke breeze settling tank with the water in the coke quenching tower backwater ditch, after to mix into mass concentration be 0.5～1.5% boric acid water; Accomplish the spray quenching by the shower group that is pumped to the coke quenching tower top; So that in spray quenching process, make boron vapour under " steam cushion " effect, go deep into coke inside; Form the C-B complex compound, pass through B again
2O
3Stop up reaction channel, let boric acid get into coke inside as much as possible, thereby improve high temperature metallurgical properties of coke, but use the boric acid water of excessive concentrations, let B easily prematurely
2O
3Stop up reaction channel, it is inner to be unfavorable for that boric acid gets into coke, and the boric acid water of crossing lower concentration then is difficult to improve the high temperature metallurgical properties of coke, and therefore, suitable concentration is 0.5～1.5%.
The present invention compared with prior art has following beneficial effect: because the improvement effect of boric acid STRENGTH ON COKE hot strength index, the past rests on the laboratory test conceptual phase always, really is not applied to the report of production practice.The present invention is through scheduling to last trimestral industrialness production practice, and the result shows: the inventive method not only can significantly be improved the hot strength of coke index, and can also improve the cold strength index of coke, and the high temperature alkali resistance that improves coke.The present invention has effectively overcome boric acid refractory, the high deficiency of loss in addition, has realized the optimization of technical data, and the improvement that helps to realize boric acid STRENGTH ON COKE high temperature metallurgical properties reaches maximization.
Embodiment
Below in conjunction with embodiment the present invention is done and to further describe.
Embodiment 1
The method of improving high temperature metallurgical properties of coke provided by the invention is following:
A, boric acid is invested in the coke quenching tower backwater ditch, together gets into the coke breeze settling tank, after to mix into mass concentration be 0.5% boric acid water, by the shower group that is pumped to the coke quenching tower top with the water in the coke quenching tower backwater ditch;
B, being that 1000 ± 50 ℃ coke send in the conventional coke quenching tower with temperature, by the amount of 1 ton of the burnt water of ton, by the shower group of coke quenching tower top, is 0.5%% boric acid water with mass concentration, with 1260m
3The flow of/h, 160 seconds quenching time, once spray on this coke, make coke be cooled to 80 ℃, let boron vapour under " steam cushion " effect, get into coke inside as much as possible, form the C-B complex compound, pass through B again
2O
3Stop up reaction channel, gained coke M
40On average improved 0.39 percentage point, M
100.35 percentage point of average improvement; New reactivity of coke CRI on average reduces by 0.90 percentage point, and post-reaction strength CSR on average improves 1.67 percentage points, and behind the participation blast-furnace smelting, average daily output improves 19t, and coke ratio reduces 17kg/t.
Embodiment 2
The method of improving high temperature metallurgical properties of coke provided by the invention is following:
A, boric acid is invested in the coke quenching tower backwater ditch, together gets into the coke breeze settling tank, after to mix into mass concentration be 1.5% boric acid water, by the shower group that is pumped to the coke quenching tower top with the water in the coke quenching tower backwater ditch;
B, being that 1000 ± 50 ℃ coke send in the conventional coke quenching tower with temperature, by the amount of 2.5 tons of the burnt waters of ton, by the shower group of coke quenching tower top, is 1.5% boric acid water with mass concentration, with 1260m
3The flow of/h, 110 seconds quenching time, once spray on this coke, make coke be cooled to 50 ℃, let boron vapour under " steam cushion " effect, get into coke inside as much as possible, form the C-B complex compound, pass through B again
2O
3Stop up reaction channel, gained coke M
40On average improved 0.80 percentage point, M
100.40 percentage point of average improvement; New reactivity of coke CRI on average reduces by 1.93 percentage points, and post-reaction strength CSR on average improves 2.80 percentage points.After participating in blast-furnace smelting, average daily output improves 630t, and coke ratio reduces 65kg/t.
Embodiment 3
The method of improving high temperature metallurgical properties of coke provided by the invention is following:
A, boric acid is invested in the coke quenching tower backwater ditch, together gets into the coke breeze settling tank, after mixing into the boric acid water that mass concentration is 1 %, by the shower group that is pumped to the coke quenching tower top with the water in the coke quenching tower backwater ditch;
B, being that 1000 ± 50 ℃ coke send in the conventional coke quenching tower with temperature, by the amount of 1.8 tons of the burnt waters of ton, by the shower group of coke quenching tower top, is 1% boric acid water with mass concentration, with 1260m
3The flow of/h, 130 seconds quenching time, once spray on this coke, make coke be cooled to 65 ℃, let boron vapour under " steam cushion " effect, get into coke inside as much as possible, form the C-B complex compound, pass through B again
2O
3Stop up reaction channel, gained coke M
40On average improved 0.20 percentage point, M
100.10 percentage point of average improvement; New reactivity of coke CRI on average reduces by 0.72 percentage point, and post-reaction strength CSR on average improves 1.15 percentage points, and behind the participation blast-furnace smelting, average daily output improves 18t, and coke ratio reduces 13kg/t.
Claims (4)
1. method of improving high temperature metallurgical properties of coke is characterized in that: by the amount of 1～2.5 ton of the burnt water of ton, be 0.5～1.5% boric acid water with mass concentration, with 1260m
3The flow of/h, 110～160 seconds quenching time, once spray on temperature is 1000 ± 50 ℃ coke, make coke be cooled to 50～80 ℃, promptly accomplish the quenching operation.
2. the method for improving high temperature metallurgical properties of coke as claimed in claim 1 is characterized in that said quenching operation accomplishes in conventional coke quenching tower.
3. the method for improving high temperature metallurgical properties of coke as claimed in claim 1 is characterized in that said spray is to accomplish through the shower group that is installed in the coke quenching tower top.
4. the method for improving high temperature metallurgical properties of coke as claimed in claim 1; It is characterized in that said mass concentration is 0.5～1.5%% the following method acquisition of boric acid water process: boric acid is invested in the coke quenching tower backwater ditch; Water with in the coke quenching tower backwater ditch together gets into the coke breeze settling tank; After to mix into mass concentration be 0.5～1.5% boric acid water,, accomplish the spray quenching by the shower group that is pumped to the coke quenching tower top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102730654A CN102786963A (en) | 2012-08-02 | 2012-08-02 | Method for improving high-temperature metallurgical property of coke |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102730654A CN102786963A (en) | 2012-08-02 | 2012-08-02 | Method for improving high-temperature metallurgical property of coke |
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| CN102786963A true CN102786963A (en) | 2012-11-21 |
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| CN2012102730654A Pending CN102786963A (en) | 2012-08-02 | 2012-08-02 | Method for improving high-temperature metallurgical property of coke |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1392223A (en) * | 2002-04-30 | 2003-01-22 | 重庆大学 | Coke modifying process |
| CN1990838A (en) * | 2005-12-28 | 2007-07-04 | 中国科学院兰州化学物理研究所 | Coke heat stability composition |
| CN102453488A (en) * | 2011-08-10 | 2012-05-16 | 王长龙 | Environmental protection type economic formulation of coke strength enhancer of water-quenched coke |
-
2012
- 2012-08-02 CN CN2012102730654A patent/CN102786963A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1392223A (en) * | 2002-04-30 | 2003-01-22 | 重庆大学 | Coke modifying process |
| CN1990838A (en) * | 2005-12-28 | 2007-07-04 | 中国科学院兰州化学物理研究所 | Coke heat stability composition |
| CN102453488A (en) * | 2011-08-10 | 2012-05-16 | 王长龙 | Environmental protection type economic formulation of coke strength enhancer of water-quenched coke |
Non-Patent Citations (1)
| Title |
|---|
| 杨雪峰等: "昆钢熄焦水添加硼酸工业试验", 《2006年全国炼铁生产技术会议暨炼铁年会文集》, 1 April 2006 (2006-04-01) * |
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Application publication date: 20121121 |