CN101435660B - Masonry method of stainless steel smelting GOR furnace bottom - Google Patents
Masonry method of stainless steel smelting GOR furnace bottom Download PDFInfo
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- CN101435660B CN101435660B CN 200810249737 CN200810249737A CN101435660B CN 101435660 B CN101435660 B CN 101435660B CN 200810249737 CN200810249737 CN 200810249737 CN 200810249737 A CN200810249737 A CN 200810249737A CN 101435660 B CN101435660 B CN 101435660B
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Abstract
The invention discloses a method for bricking the furnace bottom of a stainless steel smelting GOR furnace. The method comprises the following steps: (1) a bottom case of the furnace is placed into a bricking region; a seat brick is placed in a windhole; and the windhole of the seat brick and a windhole of the bottom case of the furnace are aligned; (2) a layer of joint filler is paved on the bottom case of the furnace; (3) two layers of small magnesia carbon bricks are flatly bricked on the joint filler; (4) a layer of magnesia carbon bricks are flatly bricked on the small magnesia carbon bricks; (5) a windhole brick is placed on the seat brick; and a ring of the magnesia carbon bricks are vertically and outwardly bricked and cling to the windhole brick; (6) further, the magnesia carbon bricks are vertically bricked from inside to outside; (7) when the magnesia carbon bricks are bricked to reach the diameter of a working layer, the magnesia carbon bricks are outwardly and vertically bricked; and (8) bricks are bricked on the edge of the furnace bottom according to residual dimension; block bricks with proper dimension are cut for filling; and the gap of the edge is filled and tamped through the joint filler. The method has the advantages that the method improves the capacity for damp resistance of the furnace bottom, effectively prolongs the service life of the furnace bottom, reduces cost and a working procedure of bricking, saves time and improves efficiency.
Description
Technical field
The present invention relates to the GOR stove masonry of well method that a kind of iron and steel metallurgical industry is used for stainless steel smelting.
Background technology
The GOR stove that stainless steel smelting uses gas oxygen to smelt usually, the GOR stove is the bottom-blown converter of various energy medium top-bottom blowing, and three bushing type nozzles by being installed in converter bottom are blown into oxygen, nitrogen, the argon gas of adjustable composition, the mist of natural gas (or other hydrocarbon) to the molten bath.Present employed GOR converter furnace bottom is to be built by laying bricks or stones and formed by joint filler, little magnesia brick, magnesia-calcium-carbon brick, and its process is the joint filler of 15-25mm for elder generation's place mat one deck thickness on bearth shell; Build one deck magnesia-calcium-carbon brick on joint filler by laying bricks or stones, its thickness is 100m, and the little MAG block brick that will cut suitable dimension is in addition filled around the furnace bottom chamber; Place three wind eye bricks then, again by the interior magnesia-calcium-carbon brick of building by laying bricks or stones outward as working lining, its height equal with wind eye brick; Build magnesia-calcium-carbon brick by laying bricks or stones in the furnace bottom periphery at last.There is following shortcoming in this building method:
1 in building process clip more, cause building process consuming time in a large number, efficient is not high, and dust is more;
2 owing to used magnesia-calcium-carbon brick building materials, and the easy powder that makes moist must dryly be placed, thereby caused can not shifting to an earlier date in the production process at the bottom of the masonry heater, and is bigger to the influence of GOR stove operating rate;
3 owing to the magnesia-calcium-carbon brick longer dimension that is adopted, and its length is 870mm, and relatively is afraid of tide again, so disconnected brick phenomenon in use often appears in furnace bottom, greatly reduces the service life of furnace bottom;
4 because furnace bottom is afraid of tide, when not producing, needs regularly to add the lime protection against the tide in stove, and operation is numerous and diverse and cost is higher.
Summary of the invention
The present invention is directed to the problem that the masonry of well technology of existing stainless steel smelting GOR furnace exists, provide a kind of and build that efficient height, cost are low, the building method of the stainless steel smelting GOR furnace furnace bottom of furnace bottom long service life by laying bricks or stones.
The building method of stainless steel smelting GOR furnace furnace bottom of the present invention may further comprise the steps:
(1) bearth shell is positioned over builds the district by laying bricks or stones, after placing steadily, lay at the eye of wind place specification for the wide * of long * thick=brick cup of 250mm*250mm*245mm (model is MG7R5#), when laying the eye of wind on the brick cup and the eye of wind on the bearth shell are aligned, and insert and build the false rifle checking that stove is used, reference standard is that false rifle can be inserted into the bearth shell eye of wind smoothly from the brick cup eye of wind;
(2) put brick cup well after, place mat one deck thickness is the joint filler of 10mm--20mm on bearth shell, requires joint filler to be tiled on the bearth shell, and spreads evenly the maintenance level out;
(3) with the fine rule two ends earn directly hang respectively with the furnace bottom both sides as horizontal reference, on joint filler flat build two-layer specification for the wide * of long * thick=the little magnesia brick of 230mm*115mm*65mm (model is M1), carbon content is less than 4% in the quality of this little magnesia brick, guarantee little magnesia brick laying level, and should guarantee that brickwork joint does not closely have vertical masonry joint, fill with joint filler at the place, slit;
(4) according to the described method production technique of step (3) benchmark, on little magnesia brick flat build one deck specification for the wide * of long * thick=magnesia carbon brick of 300mm*150mm*100mm (model is MG3R2#), carbon content is less than 4% in the quality of this magnesia carbon brick, guarantee magnesia brick laying level, and should guarantee that brickwork joint is tight and vertical masonry joint can not occur, fill with joint filler at the place, slit;
(5) on brick cup, lay specification for the wide * of long * thick=wind eye brick of 810mm*150mm*100mm (model is MG7R4#), the eye of wind of wind eye brick will align with the eye of wind of brick cup, to correction method and standard as described in the step (1), be close to wind eye brick outwards perpendicular build a circle specification for the wide * of long * thick=magnesia carbon brick of 810mm*150mm*100mm (model is MG7R3#), guarantee that brickwork joint does not closely have vertical masonry joint;
(6) further perpendicular from inside to outside build specification for the wide * of long * thick=magnesia carbon brick of 750mm*150mm*100mm (model is MG3R1#), guarantee that brickwork joint does not closely have vertical masonry joint;
(7) when the magnesia carbon brick of step (6) is built the working lining diameter, outwards laid on end build specification for the wide * of long * thick=magnesia carbon brick of 300mm*150mm*100mm (model is MG3R2#), guarantee the laying level, and should guarantee that brickwork joint does not closely have vertical masonry joint;
(8) in furnace bottom edge, carry out clip according to surplus size, suitable piece brick is filled up to cut size, and dozen reality is filled with joint filler by place, slit, edge.
In the said method, lay bricks material and specification of furnace bottom working lining improved, corresponding used part is laid bricks and is highly adjusted; Wind eye brick is built by laying bricks or stones by original overall structure and is changed a kind of new structure into and build by laying bricks or stones.Furnace bottom operational layer brick bottom is built into by the flat magnesia brick of building of joint sealing material, the little magnesia brick of two-layer flat block and one deck respectively from the bottom to top, makes working lining magnesia carbon brick height be not more than 750mm.Wind eye brick changes brick cup into by original overall structure and two kinds of brick type combinations of wind eye brick are built by laying bricks or stones.
The present invention adopts magnesia carbon brick to replace magnesia-calcium-carbon brick in the past, has improved the moisture resistance of furnace bottom, can avoid the disconnected brick of furnace bottom in use, effectively prolongs the life of bottom, reduces cost; Adopt the combination of brick cup and wind eye brick to replace a monoblock wind eye brick, and only use a kind of magnesia carbon brick of model to replace the magnesia-calcium-carbon brick of two kinds of models in the past, reduced and built operation by laying bricks or stones, save time, improved efficient; Owing to reduced the frequency of clip in the process, not only save time but also can effectively avoid airborne dust in addition.Simultaneously, reduced the length of working lining, also can avoid production process to interrupt the appearance of brick phenomenon, be beneficial to and reduce cost; The present invention has increased the thickness of permanent layer, reduced the height of working lining, and bottom blowing rifle overall length is constant, and it is apparent in view that working lining exhausts the back tomography in process of production, can in time judge the furnace bottom operating position, so that furnace bottom in time rolls off the production line, safety coefficient is higher.
Description of drawings
Fig. 1 utilizes cutaway view at the bottom of the GOR refining furnace that the present invention makes;
Fig. 2 is that bottom brick is arranged schematic diagram;
Wherein, 1, brick cup, 2, wind eye brick, 3, the eye of wind, 4, working lining, 5, bearth shell, 6, furnace lining.
The specific embodiment
Below 60 tons of GOR masonry of wells be example describes stainless steel smelting GOR furnace of the present invention in detail in conjunction with Fig. 1 masonry of well method.
As shown in Figure 1, the refractory material of building by laying bricks or stones of bearth shell 5 is made up of the magnesia brick of joint filler, two kinds of models and wind eye brick etc.Adopt carbon containing less than 4% magnesia carbon brick as furnace bottom working lining 4.The furnace bottom working lining is built into by the flat magnesia brick of building of joint filler, the little magnesia brick of two-layer flat block and one deck respectively below 4 from the bottom to top, and the magnesia carbon brick height in the working lining 4 is not more than 750mm.Wind eye brick 2 changes combining structure into by original overall structure and builds by laying bricks or stones, is divided into 2 two kinds of brick types of brick cup 1 and wind eye brick.Material usage such as following table:
Specifically may further comprise the steps when building by laying bricks or stones:
1. bearth shell 5 is positioned over and builds the district by laying bricks or stones, after placing steadily, the brick cup 1 that to lay three models at three eye of wind 3 places be MG7R5#, when laying the eye of wind of brick cup 1 and the eye of wind 3 on the bearth shell 5 are aligned, and insert to build false rifle that stove uses with checking, reference standard is in false rifle can be inserted into the eye of wind 1 on the bearth shell 5 smoothly from the brick cup eye of wind;
2. after putting brick cup well, place mat one deck thickness is the joint filler of 10mm-20mm on bearth shell 5, requires joint filler will be tiled on the bearth shell 5, and spreads evenly the maintenance level out;
3. hang finger stone with the fine rule two ends, hang and the furnace bottom both sides respectively, fine rule is earned directly as horizontal reference, the two-layer model of flat block is the magnesia carbon brick of M1 on joint filler, guarantee magnesia carbon brick laying level, and should guarantee that brickwork joint is tight and vertical masonry joint can not occur, fill with joint filler at the place, slit, and the arrangement of furnace bottom magnesia carbon brick as shown in Figure 2;
According to the said method of step 3 as horizontal reference, flat on model is the magnesia carbon brick of M1 to build one deck model be the magnesia carbon brick of MG3R2#, guarantees magnesia carbon brick laying level, and should guarantee brickwork joint closely and vertical masonry joint can not occur, fill with joint filler at the place, slit;
5. on brick cup 1, lay wind eye brick 2, its model is MG7R4#, and wind eye brick 2 will align with brick cup 1, to correction method and standard as described in the step 1, being close to the outwards perpendicular block one circle model of wind eye brick 2 is the magnesia carbon brick of MG7R3#, guarantees that brickwork joint is tight and vertical masonry joint can not occur;
6. further perpendicular from inside to outside block model is the magnesia carbon brick of MG3R1#, guarantees that brickwork joint is tight and vertical masonry joint can not occur;
7. when the magnesium carbon of MG3R1# reached the working lining diameter, outwards the laid on end model was the magnesia carbon brick of MG3R2#, guarantees the laying level, and should guarantee that brickwork joint is tight and vertical masonry joint can not occur;
8. furnace bottom 5 edges carry out clip according to surplus size, and suitable piece brick is filled up to cut size, and dozen reality is filled with joint filler by place, slit, edge.
60 tons of GOR furnace bottoms of building by laying bricks or stones are as stated above compared with previous methods, and direct benefit is:
Press 4950 yuan/ton on magnesia brick, 3500 yuan/ton of magnesia-calcium bricks, 6000 yuan of/ton meters of magnesia carbon brick, calculate with 60 tons of every furnace gauges of steel: with used in the past building method, each furnace bottom approximately uses about 25 stoves, anti-material is 27.783 tons, and wind eye brick weight is 0.56 ton, and then the loss per ton steel of anti-the material is (27.783 * 3500+0.560 * 4950)/(60 * 25)=66.68 yuan; And adopt new masonry of well technology, and each furnace bottom service life, about about 40 stoves, anti-material was 28.223 tons greatly, loss per ton steel is (28.223 * 3500+0.560 * 2 * 4950)/(60 * 40)=43.47 yuan.
More than the visible new masonry of well method that adopts after improving, can obviously reduce the refractory consumption of ton steel, effectively reduce cost; In addition,, reduced the frequency of changing furnace bottom, thereby can win the more production time, improved economic benefit, reduced the discharging of solid waste simultaneously, protected environment owing to prolonged furnace bottom service life.
Claims (1)
1. the building method of a stainless steel smelting GOR furnace furnace bottom is characterized in that, may further comprise the steps:
(1) bearth shell is positioned over builds the district by laying bricks or stones, after placing steadily, lay at the eye of wind place specification for the wide * of long * thick=brick cup of 250mm*250mm*245mm, when laying the eye of wind on the brick cup and the eye of wind on the bearth shell are aligned, and insert and build the false rifle checking that stove is used, reference standard is that false rifle can be inserted into the bearth shell eye of wind smoothly from the brick cup eye of wind;
(2) put brick cup well after, place mat one deck thickness is the joint filler of 10mm--20mm on bearth shell, requires joint filler to be tiled on the bearth shell, and spreads evenly the maintenance level out;
(3) with the fine rule two ends earn directly hang respectively with the furnace bottom both sides as horizontal reference, on joint filler flat build two-layer specification for the wide * of long * thick=the little magnesia carbon brick of 230mm*115mm*65mm, carbon content is less than 4% in the quality of this little magnesia carbon brick, guarantee little magnesia carbon brick laying level, and should guarantee that brickwork joint does not closely have vertical masonry joint, fill with joint filler at the place, slit;
(4) according to the described method production technique of step (3) benchmark, on little magnesia carbon brick flat block one deck specification for the wide * of long * thick=magnesia carbon brick of 300mm*150mm*100mm, carbon content is less than 4% in the quality of this magnesia carbon brick, guarantee magnesia carbon brick laying level, and should guarantee that brickwork joint is tight and vertical masonry joint can not occur, fill with joint filler at the place, slit;
(5) on brick cup, lay specification for the wide * of long * thick=wind eye brick of 810mm*150mm*100mm, the eye of wind of wind eye brick will align with the eye of wind of brick cup, to correction method and standard as described in the step (1), be close to wind eye brick outwards perpendicular build a circle specification for the wide * of long * thick=magnesia carbon brick of 810mm*150mm*100mm, guarantee that brickwork joint does not closely have vertical masonry joint;
(6) further perpendicular from inside to outside build specification for the wide * of long * thick=magnesia carbon brick of 750mm*150mm*100mm, guarantee that brickwork joint does not closely have vertical masonry joint;
(7) when the magnesia carbon brick of step (6) is built the working lining diameter, outwards laid on end build specification for the wide * of long * thick=magnesia carbon brick of 300mm*150mm*100mm, guarantee the laying level, and should guarantee that brickwork joint does not closely have vertical masonry joint;
(8) in furnace bottom edge, carry out clip according to surplus size, suitable piece brick is filled up to cut size, and dozen reality is filled with joint filler by place, slit, edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810249737 CN101435660B (en) | 2008-12-30 | 2008-12-30 | Masonry method of stainless steel smelting GOR furnace bottom |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810249737 CN101435660B (en) | 2008-12-30 | 2008-12-30 | Masonry method of stainless steel smelting GOR furnace bottom |
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| Publication Number | Publication Date |
|---|---|
| CN101435660A CN101435660A (en) | 2009-05-20 |
| CN101435660B true CN101435660B (en) | 2011-01-19 |
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| CN 200810249737 Expired - Fee Related CN101435660B (en) | 2008-12-30 | 2008-12-30 | Masonry method of stainless steel smelting GOR furnace bottom |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269522B (en) * | 2011-06-28 | 2013-04-24 | 南京钢铁股份有限公司 | Building process of furnace bottom of electric furnace |
| CN102417947A (en) * | 2011-12-12 | 2012-04-18 | 莱芜钢铁股份有限公司 | Detachable furnace bottom and top and bottom combined blown converter comprising same |
| CN104762437B (en) * | 2015-04-14 | 2016-07-06 | 四川西南不锈钢有限责任公司 | A kind of modified model GOR converter |
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Granted publication date: 20110119 Termination date: 20161230 |