CN101649368B - Method for integrally pouring mixer furnace - Google Patents
Method for integrally pouring mixer furnace Download PDFInfo
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- CN101649368B CN101649368B CN2009100639334A CN200910063933A CN101649368B CN 101649368 B CN101649368 B CN 101649368B CN 2009100639334 A CN2009100639334 A CN 2009100639334A CN 200910063933 A CN200910063933 A CN 200910063933A CN 101649368 B CN101649368 B CN 101649368B
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Abstract
The invention provides a method for integrally pouring a mixer furnace. The method comprises the following steps: (1) adopting pouring materials of different varieties (three varieties together) for different original parts, namely a furnace bottom, a furnace body (a slag line and a tapping spout) and a furnace top respectively, wherein the technique of the invention reduces the pouring materialsto one variety and the pouring materials comprise the following components in percentage by weight: 80-94% of Al2O3 and 6-20% of SiC; (2) optimizing and adjusting a roasting system comprising a heating curve, a heating speed, heat-preservation time, total roasting time and the like; and (3) solving a maintenance technique of key parts comprising the tapping spout and the slag line which influencethe service life of the mixer furnace after inside lining pouring materials are simplified. In the roasting technology, the heating speed needs to be controlled at 15+/-2 DEG C/hour at each heating stage before the temperature of 450 DEG C, otherwise, a condition that water in the inside lining pouring materials is not removed in time to cause collapse can occur. After the temperature of 750 DEG C, the heating speed can be controlled according to an upper limit of 50 DEG C/hour, and the pouring materials can be directly put into use and operation after being directly heated to a maximum temperature (about 1,250 DEG C).
Description
Technical field
The present invention relates to a kind of method for integrally pouring mixer furnace, be applied to the integrated poured field of steelworks hot metal mixer liner.
Background technology
Before 2002, the hot metal mixer furnace lining is built by laying and is all adopted the refractory brick brick-building art, and its shortcoming is that maintenance duration is long, and hot metal mixer is low work-ing life, and comprehensive cost is high.Engendered by brick and changed into integrated poured practice thereafter, integrated poured technology is different according to the working conditions at positions such as furnace bottom, shaft (slag line with tap a blast furnace chew), furnace roof and service requirements on the selection thinking of furnace lining mould material, selects mould material of different nature respectively.Be in molten iron immersion and the covering infiltration and the extruding of bearing high temperature liquid iron in the normal productive process midium or long term as the hot metal mixer furnace bottom; In advancing the iron process, convert the iron side bottom and be subjected to molten iron and wash away.Therefore, this part material select for use possess the refractoriness under load height, high grade bauxite and fused white corundum that hot strength is high.Facts have proved that this technology has played the effect that improves the hot metal mixer life-span.But further practice manifests some defectives of this technology gradually: the one, leave multiple mould material of different nature in narrow working-yard during construction, and cause easily to obscure and misuse; The 2nd, differing materials need be poured into a mould in different positions, and batch mixing is stirred increases difficulty, and prolong the duration of pouring, and maintenance duration increases than brick not anti-reflection; The 3rd, differing materials has different creep propertiess and line velocity of variation characteristic, and the baking difficulty is increased, and storing time prolongs, and holds bad meeting and produces the liner explosion.
It is main raw material that former integrated poured technology furnace bottom is selected high grade bauxite, fused white corundum for use, adopts low cement bonded mullite pouring material, and partly adds three stone raw materials in matrix; Shaft aluminium silicon carbide castable; Furnace roof selects for use matrix group to become the low cement deposit material of mullite.
Summary of the invention
The objective of the invention is:
1) former different sites is that furnace bottom, shaft (slag line with tap a blast furnace chew), furnace roof adopt different sorts mould material (totally three kinds) respectively, and the technology of the present invention will reduce to a kind of with the pouring material feeding;
2) optimize and revise the baking system, comprise heating curve, heat-up rate, soaking time, baking total time etc.;
3) tapping a blast furnace after solving the liner mould material and simplifying chewed with slag line these maintenance technologies that influences the key position in hot metal mixer work-ing life.
Technical scheme of the present invention:
Based on taking all factors into consideration of aspects such as cost, life-span and easy construction, after Study on Process, decision is unified adopts a kind of mould material, and adjusts the physical and chemical index (as following table) of determining this mould material, and its component and weight percent are Al
2O
3: 80～94, SiC:6～20, the whole cast duration reduces 2 days.
Adjust and determine new baking process (seeing the following form 1):
1) heating-up time 19-21 hour, heat-up rate was 10 ℃/hour, was incubated 11～13 hours from normal temperature to 100 ℃ ± 10 first temperature rise period;
2) second temperature rise period to 150 ℃, heating-up time 9-11 hour, heat-up rate was 5 ℃/hour, was incubated 59～61 hours;
3) the 3rd temperature rise period to 200 ℃, heating-up time 4-6 hour, heat-up rate was 10 ℃/hour, was incubated 11～13 hours;
4) the 4th temperature rise period to 350 ℃, heating-up time 9-11 hour, heat-up rate was 15 ℃/hour, was incubated 47～49 hours;
5) 350 ℃ to 450 ℃ of the 5th temperature rise periods, heating-up time 6-8 hour, heat-up rate was 15 ℃/hour, was incubated 35～37 hours;
6) 450 ℃ to 750 ℃ of the 6th temperature rise periods, heating-up time 11-13 hour, heat-up rate was 25 ℃/hour, was incubated 35～37 hours;
7) 750 ℃ of the 7th temperature rise periods to top temperature about 1250 ℃, 10 hours heating-up times, heat-up rate is 50 ℃/hour, need not be incubated and directly comes into operation.
In the baking process, 450 ℃ of each temperature rise periods in the past, heat-up rate must be controlled at 15 ℃ ± 2/ hour, gets rid of too late and situation that burst apart otherwise liner mould material moisture content can occur.After 750 ℃, heat-up rate can be by 50 ℃ of/hour controls of the upper limit, directly be warming up to top temperature (about 1250 ℃) after, the operation of directly coming into operation.
Baking system before and after table 1 adjustment is improved (the control curve heats up) contrast
Beneficial effect of the present invention:
Integrated poured technology of the present invention all adopts a kind of mould material, overhauls more former saving of total duration 2 days, and the time between overhaul (life-span) improves 13%, and the comprehensive cost expense reduces by 30%.
Description of drawings
Fig. 1 is a former baking curve synoptic diagram (319 hours): transverse axis is represented to heat up and the insulation period, and 6 sections (oblique line section) that heat up are wherein arranged, 6 holding-zones (horizontal line section), and the time of each liter, holding-zone is not equalization; The longitudinal axis is represented temperature, and unit is degree centigrade.
Fig. 2 baking curve synoptic diagram of the present invention (278 hours total times): transverse axis is represented to heat up and the insulation period, and 7 sections (oblique line section) that heat up are wherein arranged, 6 holding-zones (horizontal line section), and liter, holding-zone time are not equalization; The longitudinal axis is represented temperature, and unit is degree centigrade.(storing temperature control of the present invention is an interval range, and this figure belongs to one of them)
Embodiment
The method for integrally pouring mixer furnace that the present invention relates to comprises the cast of preparation mould material, baking process, taps a blast furnace and chew the position maintenance, and the component of its mould material and weight percent are Al
2O
3: 80～94, SiC:6～20; Baking process is as follows:
1) heating-up time 19-21 hour, heat-up rate was 10 ℃/hour, was incubated 11～13 hours from normal temperature to 100 ℃ ± 10 first temperature rise period;
2) second temperature rise period to 150 ℃, heating-up time 9-11 hour, heat-up rate was 5 ℃/hour, was incubated 59～61 hours;
3) the 3rd temperature rise period to 200 ℃, heating-up time 4-6 hour, heat-up rate was 10 ℃/hour, was incubated 11～13 hours;
4) the 4th temperature rise period to 350 ℃, heating-up time 9-11 hour, heat-up rate was 15 ℃/hour, was incubated 47～49 hours;
5) 350 ℃ to 450 ℃ of the 5th temperature rise periods, heating-up time 6-8 hour, heat-up rate was 15 ℃/hour, was incubated 35～37 hours;
6) 450 ℃ to 750 ℃ of the 6th temperature rise periods, heating-up time 11-13 hour, heat-up rate was 25 ℃/hour, was incubated 35～37 hours;
7) 750 ℃ of the 7th temperature rise periods to top temperature about 1250 ℃, 10 hours heating-up times, heat-up rate is 50 ℃/hour, need not be incubated and directly comes into operation.
In the baking process, 450 ℃ of each temperature rise periods in the past, heat-up rate must be controlled at 15 ℃ ± 2/ hour, gets rid of too late and situation that burst apart otherwise liner mould material moisture content can occur.After 750 ℃, heat-up rate can be by 50 ℃ of/hour controls of the upper limit, directly be warming up to top temperature (about 1250 ℃) after, the operation of directly coming into operation.
The main modification point of the baking system after the optimization shows the following aspects: A) soaking time before 350 ℃ reduces 12 hours.B) heat-up rate before 350 ℃ slows down, and reduces to 5 ℃ by former 10 ℃.C) 750 ℃ soaking time increases by 24 hours.D) no longer insulation after 750 ℃ is raised to directly come into operation after the highest 10 hours to about 1250 ℃ (seeing Table 1) continuously
The silicon carbide Gunning refractory of the maintaining employing of chewing and the identical material of hot metal mixer furnace charge of tapping a blast furnace; Slag lining is safeguarded: in stove labour early stage (6 months sections), the iron deposit amount is by upper limit control in the stove; In stove labour later stage (after 18 months sections), the iron deposit amount is pressed lower limit control in the stove.In the whole stove labour phase, the erosion condition of the slag lining that arrives is according to the observation realized dynamically adjusting to iron deposit amount in the stove, makes slag line reach even erosive effect in the position up and down.
Embodiment and actual effect:
1, the component of mould material and weight percent are Al
2O
3: 75, SiC:25; And adopt the former baking control curve (actual temperature control sees Table 2, total storing time 319 hours) that heats up to toast, an overhaul in month use that puts into operation that finishes, operation life 19 months.
Annotate: under the mould material and baking process of this component, hot metal mixer operation life has only 18 months, does not reach 24 months target of expection.
2, enforcement is integrated poured, and the component of employed mould material and weight percent are Al
2O
3: 85, SiC:15; And adopt the adjusted new baking control curve (actual temperature control sees Table 3, total storing time 265 hours) that heats up to toast, the overhaul use that puts into operation that finishes, 30 days durations; Operation life 24 months.
3, enforcement is integrated poured, and the component of employed mould material and weight percent are Al
2O
3: 90, SiC:10; And adopt adjusted new baking intensification control curve (actual temperature control sees Table 4, total storing time 291 hours) to toast 30 days durations; Operation life 24 months.
4 enforcements are integrated poured, and the component of employed mould material and weight percent are Al
2O
3: 94, SiC:6; And adopt the adjusted new baking control curve (actual temperature control sees Table 5, total storing time 278 hours) that heats up to toast, the overhaul use that puts into operation that finishes, 30 days durations; Operation life has reached 22 months, and also in normal use, any unusual to not seeing at present, predicted life can be above 24 months.
5, enforcement is integrated poured, and the component of employed mould material and weight percent are Al
2O
3: 80, SiC:20; And adopt the adjusted new baking control curve (actual temperature control sees Table 5, total storing time 278 hours) that heats up to toast, the overhaul use that puts into operation that finishes, 30 days durations; Operation life has reached 14 months, and also in normal use, any unusual to not seeing at present, predicted life can be above 24 months.
Claims (5)
1. a method for integrally pouring mixer furnace comprises the cast of preparation mould material, baking process, taps a blast furnace and chew the position maintenance, and it is characterized in that: the component of mould material and weight percent are Al
2O
3: 80～94, SiC:6～20; Baking process is as follows:
1) 19～21 hours heating-up times, heat-up rate was 5 ℃/hour, was incubated 11～13 hours from normal temperature to 100 ℃ ± 10 ℃ first temperature rise period;
2) 100 ℃ ± 10 ℃ to 150 ℃ of second temperature rise periods, heating-up time 9-11 hour, heat-up rate was 5 ℃/hour, was incubated 59～61 hours;
3) 150 ℃ to 200 ℃ of the 3rd temperature rise periods, heating-up time 4-6 hour, heat-up rate was 10 ℃/hour, was incubated 11～13 hours;
4) 200 ℃ to 350 ℃ of the 4th temperature rise periods, heating-up time 9-11 hour, heat-up rate was 15 ℃/hour, was incubated 47～49 hours;
5) 350 ℃ to 450 ℃ of the 5th temperature rise periods, heating-up time 6-8 hour, heat-up rate was 15 ℃/hour, was incubated 35～37 hours;
6) 450 ℃ to 750 ℃ of the 6th temperature rise periods, heating-up time 11-13 hour, heat-up rate was 25 ℃/hour, was incubated 35～37 hours;
7) 10 hours heating-up times, heat-up rate is 50 ℃/hour to 1250 ℃ of top temperatures 750 ℃ of the 7th temperature rise periods, need not be incubated and directly comes into operation.
2. method for integrally pouring mixer furnace according to claim 1 is characterized in that: the component of mould material and weight percent are Al
2O
3: 85, SiC:15.
3. method for integrally pouring mixer furnace according to claim 1 is characterized in that: the component of mould material and weight percent are Al
2O
3: 90, SiC:10.
4. method for integrally pouring mixer furnace according to claim 1 is characterized in that: the component of mould material and weight percent are Al
2O
3: 94, SiC:6.
5. method for integrally pouring mixer furnace according to claim 1 is characterized in that: the silicon carbide Gunning refractory spray repair of tap a blast furnace the maintaining employing of chewing and the identical material of hot metal mixer furnace charge.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100639334A CN101649368B (en) | 2009-09-10 | 2009-09-10 | Method for integrally pouring mixer furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100639334A CN101649368B (en) | 2009-09-10 | 2009-09-10 | Method for integrally pouring mixer furnace |
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| CN101649368A CN101649368A (en) | 2010-02-17 |
| CN101649368B true CN101649368B (en) | 2011-04-06 |
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| CN2009100639334A Expired - Fee Related CN101649368B (en) | 2009-09-10 | 2009-09-10 | Method for integrally pouring mixer furnace |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988177B (en) * | 2010-09-21 | 2012-03-28 | 浙江华达钢业有限公司 | Zinc port inductor baking technology on hot-dip-Al-Zn steel sheet production line |
| CN106839778A (en) * | 2017-01-14 | 2017-06-13 | 安徽芜湖海螺建筑安装工程有限责任公司 | Castable preliminary drying roasting method and application apparatus in a kind of cement rotary kiln |
| CN111908904A (en) * | 2020-07-30 | 2020-11-10 | 海城市金福锋科技有限公司 | Stone castable for kiln and preparation method thereof |
| CN112325653B (en) * | 2020-09-28 | 2022-09-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Repairing method of metal mixer lining |
| CN113606941A (en) * | 2021-08-06 | 2021-11-05 | 江苏隆达超合金航材有限公司 | Brick crucible for vacuum induction furnace and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2312946Y (en) * | 1997-10-27 | 1999-04-07 | 包头铝厂 | Noval aluminium-liquid mixing furnace |
| CN1361292A (en) * | 2000-12-29 | 2002-07-31 | 河南省耕生实业(集团)有限公司 | Integrated metal mixer depositing process |
| CN1736954A (en) * | 2005-07-15 | 2006-02-22 | 鞍山市民兴特种耐火材料厂 | Blast furnace mixer casting material |
-
2009
- 2009-09-10 CN CN2009100639334A patent/CN101649368B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2312946Y (en) * | 1997-10-27 | 1999-04-07 | 包头铝厂 | Noval aluminium-liquid mixing furnace |
| CN1361292A (en) * | 2000-12-29 | 2002-07-31 | 河南省耕生实业(集团)有限公司 | Integrated metal mixer depositing process |
| CN1736954A (en) * | 2005-07-15 | 2006-02-22 | 鞍山市民兴特种耐火材料厂 | Blast furnace mixer casting material |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2006-111501A 2006.04.27 |
| 权芳民等.混铁炉整体浇注方案的研究与应用.《冶金能源》.2005,第24卷(第3期),47-49. * |
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