CN103601172A - Anode carbon block roasting furnace maintenance method - Google Patents
Anode carbon block roasting furnace maintenance method Download PDFInfo
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- CN103601172A CN103601172A CN201310602082.2A CN201310602082A CN103601172A CN 103601172 A CN103601172 A CN 103601172A CN 201310602082 A CN201310602082 A CN 201310602082A CN 103601172 A CN103601172 A CN 103601172A
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- wall
- flue wall
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- path wall
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Abstract
The invention relates to the field of anode carbon block roasting and particularly relates to an anode carbon block roasting furnace maintenance method. The anode carbon block roasting furnace maintenance method provided by the invention is used for solving the problem that ventilating holes are subjected to blockage and bending deformation after a flame path wall of a roasting furnace is used. The method comprises the following steps: (A) after furnace discharging operation is completed, taking out filler, and cleaning bonding materials and scaling materials from the surface of the wall by using a flame path wall cleaning machine; (B) checking the deformation degree of the flame path wall: if the deformation degree is relatively large, repeatedly carrying out straightening and joint loosening on the flame path wall by using a flame path wall straightening machine so as to reduce the deformation degree of the flame path wall, and enabling coked materials inside the ventilating holes of the flame path wall to fall off through the repeated expansion and contraction of the wall, so as to guarantee the smoothness of the ventilating holes; if the deformation degree is relatively small, sucking accumulated materials from the ventilating holes of the flame path wall by using a negative-pressure suction system. The method has the advantages that after the flame path wall is subjected to maintenance, the wall is more regular, the ventilating holes are more smooth, the quality of the flame path wall can be guaranteed during next use, and the roasting energy cannot be increased.
Description
Technical field
The present invention relates to anode carbon block roasting field, especially a kind of anode carbon block stoving oven maintaining method.
Background technology
1, sinter process brief introduction
Anode is the heart of prebaked cell Aluminium Electrolysis, it is the main consumable material in Aluminum Electrolysis Production, in the electrochemical reaction of electrolysis, participate in reacting and consuming, the quality of quality of anode directly has influence on the technico-economical comparisones such as the stably manufactured of electrolyzer and the output of electrolysis and quality.Within 2013, national electrolytic aluminum production capacity will reach more than 3,000 ten thousand tons, and year needs 1,500 ten thousand tons of left and right of anode.Anode-baking is the important procedure that electrolytic aluminium anode is produced, and object is to make pitch coking, improve anode mechanical property, improve the oxidizing reaction rate of electroconductibility that anode is good and thermal conductivity, reduction anode carbon block.
The equipment that anode-baking is used is ring-form calcining furnace, open type ring type anode-baking furnace, adopt fuelled with natural gas, every stoving oven has two flame systems, 36 furnace chambers, each furnace chamber has 8 hoppers and 9 quirks, every flue wall has 4 vision slits, adopt vertical dress pattern, each furnace chamber is placed 3 layers of anode, place 7 for every layer, anode covers stopping composition around, play isolated air, solid shape, heat transfer effect, when roasting, the heat that combustion of natural gas produces, by the conduction of flue wall and stopping composition, green anode is heated, after pitch in anode is heated, variation along with temperature, there is physics, chemical transformation, produce volatile matter, volatile matter is by flue wall breather hole, enter flue wall, participate in burning, the firing cycle adopting in roasting is 168 hours, within every 28 hours, firing system equipment need to move forward a furnace chamber, furnace chamber is through roasting-cooling-come out of the stove-furnace chamber maintenance-shove charge-roasting links, go round and begin again, cyclic production.
2, the problem that baking furnace flame path wall exists at present
2.1 baking furnace flame path walls are shorter work-ing life, and maintenance cost is higher
The stoving oven that domestic carbon element industry is used, use procedure because of flexural deformation, subside, the situation such as poorly sealed, breather hole obstruction, safeguard not in place, can cause in roasting process flue wall seriously uneven in next firing cycle temperature, affect its work-ing life, after using 3-4, need to carry out large repairs, and wall scroll flue wall overhaul cost is about 70,000 yuan.
2.2 baking furnace flame path wall flexural deformations, subside, poorly sealed, breather hole stops up and hopper bottom coking, stopping composition be inhomogeneous etc., and situation has increased the energy consumption in roasting process, has reduced quality product.
2.3 is shorter work-ing life because of stoving oven, and the waste residue amount producing after overhaul is larger, do not meet the requirement of country to energy-saving and emission-reduction.
2.4 after the flue wall flexural deformation of domestic many producers or breather hole stop up, generally take to use drill rod to remove bonding material, or because carrying out alignment and pine seam to flue wall without equipment, the inequality of being heated while causing flue wall roasting, has shortened work-ing life.
The mode that 2.5 general employings of the same trade are built by laying bricks or stones is on the spot carried out flue wall overhaul, adopt which to organize overhaul, because of the duration tight, construction environment is severe, construction quality is difficult to guarantee, and the flue wall after overhaul just enters Production Flow Chart within the short period, flue wall, through drying fully, does not easily occur bending and deformation and causes flue wall shorter work-ing life.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of obstruction of baking furnace flame path wall breather hole after use, diastrophic anode carbon block stoving oven maintaining method of solving.
The present invention solves the anode carbon block stoving oven maintaining method that its technical problem adopts, and comprises the following steps:
After A, the operation of coming out of the stove complete, take out stopping composition, application flue wall descaling machine is cleared up the bonding material of surface of wall and fouling material;
The deformation extent of B, inspection flue wall:
If deformation extent is larger, apply flue wall straightener flue wall is carried out to alignment, pine seam repeatedly, reduce the deformation extent of flue wall, process body of wall is enlargement and contraction repeatedly, and the inner coking material of flue wall breather hole is come off, and guarantees that breather hole is unimpeded;
If deformation extent is less, use negative pressure-pumping system, the buildup of flue wall breather hole is aspirated.
Further, after B step, also comprise C step: roasting furnace chamber bottom coking material piece is cleared up, and roasting oven top cover block, flue wall and cross wall angle seam are repaired to sealing.
Further, after taking out stopping composition, roasting is carried out to crushing and screening with stopping composition, make stopping composition epigranular.
Further, described stopping composition is burnt grain for roasting, and its granularity requirements is that 1～6mm accounts for more than 90%.
Further, after A step, judge whether well damage of flue wall, if not, carry out B step; If so, carry out D step: flue wall integral hoisting is carried out to strange land overhaul.
The invention has the beneficial effects as follows: due to the bonding material on flue wall surface and fouling material are cleared up, according to the deformation extent of flue wall, select to be worth and negative pressure-pumping simultaneously, this makes flue wall safeguard that back wall is more regular, breather hole is more unobstructed, this makes flue wall also can ensure the quality of products while once using upper, can not increase roasting energy, therefore can in long-term use procedure, improve the quality of products, reduce waste residue discharge capacity, solved baking furnace flame path wall shorter problem in work-ing life.When safeguarding, can also carry out crushing and screening to the stopping composition of roasting, thereby improve the quality of next roasting.
Accompanying drawing explanation
Fig. 1 is schema of the present invention;
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Flow process of the present invention is shown in Figure 1, comprises the following steps:
After A, the operation of coming out of the stove complete, take out stopping composition, application flue wall descaling machine is cleared up the bonding material of surface of wall and fouling material;
The deformation extent of B, inspection flue wall:
If deformation extent is larger, apply flue wall straightener flue wall is carried out to alignment, pine seam repeatedly, reduce the deformation extent of flue wall, process body of wall is enlargement and contraction repeatedly, and the inner coking material of flue wall breather hole is come off, and guarantees that breather hole is unimpeded;
If deformation extent is less, use negative pressure-pumping system, the buildup of flue wall breather hole is aspirated.
Wherein, the steps A operation of coming out of the stove completes the personnel of Hou， teams and groups according to the bonding situation of furnace chamber, employ flue wall descaling machine surface of wall sizing is cleared up, carrying out furnace chamber while cleaning operation with water, brusher is to corresponding furnace chamber, brusher enters furnace chamber inside, each brush of brusher is with retractor device, and under the effect of cylinder, brush is near baking furnace flame path wall, under motor effect, brush drives brush to rotate together, can effectively clean whole flue wall surface with water, removes its foulant.
After step B roasting oven chamber removal treatment completes, furnace chamber distortion and breather hole are stopped up to serious flue wall; The distortion of furnace chamber can rule of thumb judge, also can judge according to standard specifications, and the deformation extent of furnace chamber has made flue wall not reach corresponding national standard or service requirements.Now, the personnel of teams and groups operate loose seam machine, from bottom, middle part, proofread and correct repeatedly to body of wall at San Ge position, top and pine seam, on the one hand, flue wall is proofreaied and correct, made deformation of wall degree within limit of error, on the other hand, process body of wall is enlargement and contraction repeatedly, the inner coking material of flue wall breather hole is come off, keep breather hole unimpeded, while making roasting, volatile matter can enter in time flue wall and participate in burning, thereby guarantee that flue wall internal temperature is even, extend flue wall work-ing life.
For part, distortion gentlier or is not out of shape, its breather hole stops up more serious flue wall, the negative pressure-pumping system of application multifunction crane, obstruction material to part flue wall breather hole aspirates, thereby keep ventilating pit unimpeded, while making roasting, volatile matter can enter in time flue wall and participate in burning, thereby guarantees that flue wall internal temperature is even, extends flue wall work-ing life.
Above-mentioned steps can be repaired flue wall, and it carries out different processing according to different situations to flue wall, has improved the efficiency of safeguarding, has also guaranteed the repairing quality of flue wall.
After above-mentioned B step, can also implement following C step: establishment officer, stoving oven hopper bottom coking material piece is cleared up, and roasting oven top cover block and angle seam breakage are repaired, sealing, prevent that in roasting process, negative pressure is revealed, cause flue wall internal temperature inhomogeneous, affect furnace chamber flue wall work-ing life and quality product.Such processing can indirectly be protected flue wall, makes stoving oven still can keep good state after repeatedly using.
Roasting process is stricter to the requirement of stopping composition, granularity 1～6mm requires more than 90%, if stopping composition granularity is excessive, in roasting process, easily there is red eye phenomenon, cause stopping composition oxidation, cause being oxidized position flue wall upper temp higher, if stopping composition granularity is meticulous, powder is more, and during roasting, a large amount of stopping composition enters flue wall by breather hole or top cover brick breakage and angle seam place and participates in burning, causes flue wall internal temperature inhomogeneous; If stopping composition size-grade distribution is inhomogeneous, by affecting volatile matter, enter in quirk the degree that participates in burning, cause flue wall temperature distributing disproportionation even, affect flue wall work-ing life, need carry out crushing and screening to stopping composition, make stopping composition epigranular.
When baking furnace flame path wall well damage, while really needing overhaul, the integral hoisting tool of employing company's exploitation carries out strange land overhaul, improves flue wall overhaul masonry quality and air-dry quality, thus the work-ing life of flue wall after prolonging overhaul.
By in time baking furnace flame path wall bonding material being cleaned with water, diastrophic flue wall is carried out to alignment, breather hole is stopped up to serious carrying out pine seam simultaneously, damaged top cover is turned, angle seam is repaired in time, stoving oven hopper bed material is cleared up in time, and to roasting stopping composition homogenizing, can reach long-term maintenance flue wall surface cleaning, breather hole is unimpeded, crooked little object, Application and Development integral hoisting tool realize the overhaul of flue wall strange land, improved masonry quality and the air-dry quality in overhaul, pass through aforesaid method, reduced roasting energy consumption, improved quality product, reduced waste residue discharge capacity, solved baking furnace flame path wall shorter problem in work-ing life.
Flue wall adopts the present invention to compare with Traditional Man simple-to-maintain, and its result is as shown in the table:
Technico-economical comparison contrast table
Claims (5)
1. anode carbon block stoving oven maintaining method, is characterized in that comprising the following steps:
After A, the operation of coming out of the stove complete, take out stopping composition, application flue wall descaling machine is cleared up the bonding material of surface of wall and fouling material;
The deformation extent of B, inspection flue wall:
If deformation extent is larger, apply flue wall straightener flue wall is carried out to alignment, pine seam repeatedly, reduce the deformation extent of flue wall, process body of wall is enlargement and contraction repeatedly, and the inner coking material of flue wall breather hole is come off, and guarantees that breather hole is unimpeded;
If deformation extent is less, use negative pressure-pumping system, the buildup of flue wall breather hole is aspirated.
2. anode carbon block stoving oven maintaining method as claimed in claim 1, is characterized in that: after B step, also comprise C step: roasting furnace chamber bottom coking material piece is cleared up, and roasting oven top cover block, flue wall and cross wall angle seam are repaired to sealing.
3. anode carbon block stoving oven maintaining method as claimed in claim 1, is characterized in that: after taking out stopping composition, roasting is carried out to crushing and screening with stopping composition, make stopping composition epigranular.
4. anode carbon block stoving oven maintaining method as claimed in claim 3, is characterized in that: described stopping composition is burnt grain for roasting, and its granularity requirements is that 1～6mm accounts for more than 90%.
5. the anode carbon block stoving oven maintaining method as described in claim as arbitrary in claim 1 to 4, is characterized in that: after A step, judge whether well damage of flue wall, if not, carry out B step; If so, carry out D step: flue wall integral hoisting is carried out to strange land overhaul.
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| CN201310602082.2A CN103601172B (en) | 2013-11-21 | 2013-11-21 | Anode carbon block stoving oven maintaining method |
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| CN201310602082.2A CN103601172B (en) | 2013-11-21 | 2013-11-21 | Anode carbon block stoving oven maintaining method |
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| CN103601172A true CN103601172A (en) | 2014-02-26 |
| CN103601172B CN103601172B (en) | 2016-01-27 |
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Citations (6)
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|---|---|---|---|---|
| US6093304A (en) * | 1994-09-08 | 2000-07-25 | Moltech Invent S.A. | Cell for aluminium electrowinning |
| CN101294774A (en) * | 2008-05-23 | 2008-10-29 | 贵州莱利斯机械设计制造有限责任公司 | Cleaning method and device for anode roasting fire path wall |
| CN202339109U (en) * | 2011-11-14 | 2012-07-18 | 王国强 | Wall correcting machine for correcting deformation fire path wall of roaster |
| CN102601171A (en) * | 2012-03-16 | 2012-07-25 | 济南海川投资集团有限公司 | Straightening method of fire channel wall deformation of carbon calcinator and device |
| CN203024590U (en) * | 2012-12-24 | 2013-06-26 | 四川启明星铝业有限责任公司 | Flame path cleaner for roasting furnaces |
| CN103386667A (en) * | 2013-07-18 | 2013-11-13 | 济南海川投资集团有限公司 | Miniature straightening device for flame path wall of baking furnace |
-
2013
- 2013-11-21 CN CN201310602082.2A patent/CN103601172B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6093304A (en) * | 1994-09-08 | 2000-07-25 | Moltech Invent S.A. | Cell for aluminium electrowinning |
| CN101294774A (en) * | 2008-05-23 | 2008-10-29 | 贵州莱利斯机械设计制造有限责任公司 | Cleaning method and device for anode roasting fire path wall |
| CN202339109U (en) * | 2011-11-14 | 2012-07-18 | 王国强 | Wall correcting machine for correcting deformation fire path wall of roaster |
| CN102601171A (en) * | 2012-03-16 | 2012-07-25 | 济南海川投资集团有限公司 | Straightening method of fire channel wall deformation of carbon calcinator and device |
| CN203024590U (en) * | 2012-12-24 | 2013-06-26 | 四川启明星铝业有限责任公司 | Flame path cleaner for roasting furnaces |
| CN103386667A (en) * | 2013-07-18 | 2013-11-13 | 济南海川投资集团有限公司 | Miniature straightening device for flame path wall of baking furnace |
Non-Patent Citations (1)
| Title |
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| 郎光辉等，: "《铝电解用炭素材料技术与工艺》", 31 October 2012, article "铝电解用预焙炭阳极制造技术与工艺", pages: 160-164 * |
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