CN104390461B - Energy-saving cement rotary kiln lining and masonry process thereof - Google Patents
Energy-saving cement rotary kiln lining and masonry process thereof Download PDFInfo
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- CN104390461B CN104390461B CN201410346476.0A CN201410346476A CN104390461B CN 104390461 B CN104390461 B CN 104390461B CN 201410346476 A CN201410346476 A CN 201410346476A CN 104390461 B CN104390461 B CN 104390461B
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Abstract
An energy-saving cement rotary kiln lining and a masonry process thereof belong to the field of rotary kiln lining structure and construction. The kiln comprises a kiln body, wherein an inner lining layer is attached to the inner wall of the kiln body, and is characterized in that the inner lining layer is formed by building precast bricks and castable at intervals; the prefabricated brick comprises a working surface body and a non-working surface body, wherein the low-heat-conduction heat insulation plate layer is embedded into the non-working surface body and the casting material of the prefabricated brick respectively, and the low-heat-conduction heat insulation layer in the non-working surface body and the low-heat-conduction heat insulation layer in the casting material are distributed in a staggered mode in the kiln body. The rotary kiln prepared by the invention is wear-resistant, energy-saving and durable, can prevent the fire leaping phenomenon, and has high heat insulation performance and long service life. The rotary kiln is more environment-friendly, does not cause pollution to the environment, and is convenient and high in quality in masonry construction.
Description
Technical field
The invention belongs to structure and the construction field of inner liner of rotary kiln, be specifically related to a kind of energy saving cement inner liner of rotary kiln and brick-building art thereof.
Background technology
Rotary kiln is Thermal Equipment conventional in cement production process, and in kiln, the structure of refractory material, distribution and performance affect kiln service life, cement products quality and production efficiency to a great extent.General isometrical parcel one deck continuous print heat-insulation layer in the kiln body of tradition rotary kiln, play the effect preventing heat loss in kiln, this heat-insulation layer is once be lighted by stove fire, namely can burn totally comprehensively, not only cannot continue insulation, also can make to occur between brick body to loosen, fall brick, serious damage is caused to kiln body.
Rotary kiln clinkering zone work under bad environment, its refractory material need have good thermal shock resistance, corrosion resistance and hang kliner coating etc.The sixties in last century rises, and magnesite-chrome brick is just widely used in cement kiln clinkering zone, but it contains Cr, easy contaminated environment.Material in cement kiln is generally alkalescence, thus first-selected magnesia refractories, due to the hypertoxic Cr VI being dissolved in water can be produced after cement kiln clinkering zone magnesite-chrome brick use, serious environmental pollution can be caused, do not meet the production requirement of present stage energy-conserving and environment-protective, adopt non-chromium alkaline refractory material progressively to replace Cr2O3-containing refractories imperative.
Rotary kiln mostly adopts the refractory brick of sinter molding to build by laying bricks or stones, achieves certain result of use.But rotary kiln is in rotation status in operation process, the stress between liner and the collision of material, make refractory brick vertical and horizontal play, and construction joint gap becomes large, and kiln temperature raises, and occur kiln body rubescent and brick-dropping phenomenon time serious, heat loss is serious.Have part producer to adopt unshape refractory to solve this problem, but effect is not ideal.Compared with sizing refractory material, the resistance to material production technology of indefinite form is simple, good integrity, economize energy, becomes one of focus.It is thing in recent years that unsetting resistance to material is applied to new dry process rotary kiln clinkering zone, and its building method is still one of difficult problem.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of energy saving cement inner liner of rotary kiln and brick-building art thereof, and obtained rotary kiln is wear-resisting, energy-saving durable, and the generation of the fiery phenomenon that can also prevent from leaping up, heat-insulating property is high, long service life.Another goal of the invention of the present invention is the rotary kiln environmental protection more that order obtains, and does not pollute environment.3rd goal of the invention of the present invention is that building construction is convenient, high-quality.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of energy saving cement inner liner of rotary kiln described in invention, comprises kiln body, with inner liner on kiln body inwall, it is characterized in that inner liner is built by laying bricks or stones by preformed bricks and castable interval and forms; Preformed bricks comprises working face body and non-working surface body, and working face body is inner wearing layer, and non-working surface body is peripheral insulating; In the non-working surface body and castable of preformed bricks, embed the adiabatic flaggy of low heat conduction respectively, the low heat conduction heat insulation layer in non-working surface body and the low heat conduction heat insulation layer staggered floor in kiln body in castable distribute.
The interior pre-buried anchoring piece of preformed bricks; Preformed bricks and castable are connected and fixed by anchoring piece and kiln body.
Preformed bricks side is provided with groove, and castable embeds in groove and is connected and fixed with preformed bricks.
The percent mass of the working face body of liner tile is composed as follows:
Highly-purity magnesite 30-35;
Electricity Rong Magnesium iron sand 55-60;
Fused hercynite 6-10;
Silicon powder 3-6;
Calgon water reducer 0.10-0.20;
Explosion-proof fiber 0.05-0.15.
Non-working surface body adopts light heat-insulating material;
The percent mass of castable is composed as follows:
Highly-purity magnesite 30-35;
Electricity Rong Magnesium iron sand 55-60;
Fused hercynite 6-10;
Silicon powder 3-6;
Calgon water reducer 0.10-0.20;
Explosion-proof fiber 0.05-0.15.
The brick-building art of energy saving cement inner liner of rotary kiln of the present invention, is characterized in that comprising the steps:
(1) rotary kiln in all kiln footpaths be all that relative axisymmetric shape arranges four road reinforcing bands by the preformed bricks of band anchoring piece along axis, respectively reserves reducing end to end and to construct Distance geometry space;
(2) according to different kiln footpath, in conjunction with the total line number of building brick by laying bricks or stones drafted with reasonably build tolerance by laying bricks or stones, determine each size of preformed bricks and castable, and then determine the size of fore shaft brick;
(3), when building by laying bricks or stones, first draw line vertically, determine Article 1 reinforcing band and carry out welding building construction;
(4), after treating the construction of Article 1 reinforcing band, then once built the line number should built by laying bricks or stones between twice reinforcing band by laid dry method by laying bricks or stones, then carried out the construction of second reinforcing band, the like;
(5) during last time brick, reinforcing band and the space fore shaft brick of building by laying bricks or stones between brick locked, construct complete.
Compared with prior art, the invention has the beneficial effects as follows:
1. the working face body of preformed bricks and non-working surface body, working face body is solid wear-resisting, and non-working surface body adopts light heat-insulating material, heat-insulation and heat-preservation.Inner liner is built by laying bricks or stones by preformed bricks and castable interval and is formed, and adopts anchoring piece and kiln body to be connected and fixed, ensure that the globality of masonry, fastness, avoid the vertical and horizontal play of refractory material, ensure that the whole structure of kiln body.Structure of the present invention, under guarantee bulk strength and the prerequisite in service life, alleviates resistance to material overall weight on the one hand, reduces the load of rotary kiln, save power consumption; Greatly reduce heat transfer intensity on the other hand, decrease heat loss, energy-saving effect is remarkable, compared with traditional kiln lining, and energy-conservation more than 15%.
2. in the non-working surface body and castable of preformed bricks, embed the adiabatic flaggy of low heat conduction respectively; this structure also solves the problem of the low easy destruction of insulation material compression strength; thus the lower heat-barrier material of thermal conductivity factor can be chosen as heat-insulation layer; this structural defence heat-insulation layer material; reduce damage, rational kiln temperature can be ensured.Low heat conduction heat insulation layer in non-working surface body and the low heat conduction heat insulation layer staggered floor in kiln body in castable distribute, as the low heat conduction heat-insulating shield of heat-insulation layer, can when leaping up fire, only there is combustion to damage in its position, and can not spread to whole heat-insulation layer, ensure that heat-insulating property and the service life of kiln body.
3. the magnesium iron aluminium unshape refractory adopting highly-purity magnesite or electric smelting high ferro magnesia and fused hercynite material and auxiliary material to be prepared from can be used for cement kiln clinkering zone, and product has excellent extension kliner coating performance, reaches environmental protection, energy-conservation effect.
4. preformed bricks side is provided with groove, so that castable embeds, increases inner liner intensity, when turning round operation, combining closely, not easily occur loosening brick phenomenon between each component of inner liner.
5. use prefabricated component to replace burnt brick, decrease operating cost not only energy-conservation but also efficient, greatly reduce energy consumption.In rotary kiln operation process, under hot conditions, unshape refractory reacts and generates the magnesium iron aluminium refractory brick of spinel structure, reduces production cost.Adopt building method of the present invention, there is the advantages such as easy construction, obtained rotary kiln be durable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of preformed bricks of the present invention;
Fig. 3 is the top view of Fig. 2;
Fig. 4 is the left view of Fig. 2;
Fig. 5 is the rearview of Fig. 2;
Mark in figure: 1, kiln body; 2, anchoring piece; 3, preformed bricks; 4, the adiabatic flaggy of low heat conduction; 5, castable; 6, the adiabatic flaggy of low heat conduction; 7, anchoring piece; 8, groove.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail.
As shown in Figure 1, a kind of energy saving cement inner liner of rotary kiln of the present invention, with inner liner on the inwall of kiln body 1, inner liner is built by laying bricks or stones by preformed bricks 3 and castable 5 interval and is formed. and preformed bricks 3 comprises working face body and non-working surface body, working face body is inner wearing layer, and non-working surface body is peripheral insulating.In the non-working surface body and castable 5 of preformed bricks 3, embed the adiabatic flaggy 4 and 6 of low heat conduction respectively, the low heat conduction heat insulation layer 4 in non-working surface body distributes with low heat conduction heat insulation layer 6 staggered floor in kiln body 1 in castable 5.
The interior pre-buried anchoring piece 2 of preformed bricks 3; Preformed bricks and castable are connected and fixed by anchoring piece 2 and 7 and kiln body 1.
As Figure 1-5, preformed bricks 3 side is provided with groove 8.Castable 5 embeds in groove 8, and with prefabricated, 3 are connected and fixed.Non-working surface body adopts light heat-insulating material;
As shown in Table 1, the percent mass of the working face body of liner tile is composed as follows:
Table one:
| Component (mass percent %) | Embodiment one | Embodiment two | Embodiment three | Embodiment four |
| Highly-purity magnesite | 30 | 35 | 31.65 | 31.7 |
| Electricity Rong Magnesium iron sand | 60 | 55.75 | 55 | 55 |
| Fused hercynite | 6 | 6 | 7 | 10 |
| Silicon powder | 3.85 | 3 | 6 | 3 |
| Calgon water reducer | 0.10 | 0.15 | 0.20 | 0.15 |
| Explosion-proof fiber | 0.05 | 0.10 | 0.15 | 0.15 |
As shown in Table 2, the percent mass of castable is composed as follows:
Table two:
| Component (mass percent %) | Embodiment one | Embodiment two | Embodiment three | Embodiment four |
| Highly-purity magnesite | 30 | 35 | 31.65 | 31.7 |
| Electricity Rong Magnesium iron sand | 60 | 55.75 | 55 | 55 |
| Fused hercynite | 6 | 6 | 7 | 10 |
| Silicon powder | 3.85 | 3 | 6 | 3 |
| Calgon water reducer | 0.10 | 0.15 | 0.20 | 0.15 |
| Explosion-proof fiber | 0.05 | 0.10 | 0.15 | 0.15 |
The brick-building art of energy saving cement inner liner of rotary kiln of the present invention, is characterized in that comprising the steps:
(1) rotary kiln in all kiln footpaths be all that relative axisymmetric shape arranges four road reinforcing bands by the preformed bricks of band anchoring piece along axis, respectively reserves reducing end to end and to construct Distance geometry space;
(2) according to different kiln footpath, in conjunction with the total line number of building brick by laying bricks or stones drafted with reasonably build tolerance by laying bricks or stones, determine each size of preformed bricks and castable, and then determine the size of fore shaft brick;
(3), when building by laying bricks or stones, first draw line vertically, determine Article 1 reinforcing band and carry out welding building construction;
(4), after treating the construction of Article 1 reinforcing band, then once built the line number should built by laying bricks or stones between twice reinforcing band by laid dry method by laying bricks or stones, then carried out the construction of second reinforcing band, the like;
(5) during last time brick, reinforcing band and the space fore shaft brick of building by laying bricks or stones between brick locked, construct complete.
Novelty of the present invention is:
1. heat-insulation layer unconventional anchor ring continuous distributed; once leap up, fire all burns; but adopt staggered floor distribution; even if the one piece low adiabatic flaggy ignition of heat conduction is also only limitted to local; can normally use by the whole heat-insulation layer of protection; but preformed bricks and castable large area can not be made to loosen brick, effectively extend the service life of rotary kiln.
2. adopt highly-purity magnesite or high ferro magnesia and hercynite material to prepare thermal shock resistance and hang the excellent magnesium iron aluminium prefabricated component of kliner coating, not only increasing material self performance, more significant to environmental protection.
3. use prefabricated component to replace burnt brick, decrease operating cost not only energy-conservation but also efficient, greatly reduce energy consumption, and easy construction.
4. use anchoring piece, ensure that the globality of masonry, fastness, there is vertical and horizontal play in the brick body solved in kiln, easily causes brick problem, and protect heat-insulation layer material, reduces damage, can ensure rational kiln temperature.
5. completing of this project will bring significant economic benefit and social benefit; And met the resistance to material demand for development of the energy-conservation novel green of national environmental protection.
In sum, this product and correlation technique can be widely used in the newly-built of cement rotary kiln or carry out energy-conservation upgrading to conventional cement rotary kiln.At present, domestic this type of cement rotary kiln more than 1000 bar existing, if carry out reducing energy consumption, with the novel 300-400 of the resistance to material ton of every bar kiln, service charge in addition, by 3,000,000 yuan, per time, this resistance to section product consumption potentiality were 30-40 ten thousand tons, and total market potential is more than 3,000,000,000 yuan.Along with the fast development of the industries such as building materials, annual new upper such kiln nearly hundred, and every bar kiln running is after about 2 years, just need carry out liner replacing, therefore, the potential market capacity of this project is huge, and social benefit is remarkable.
At present, the application of cement rotary kiln market of fire resisting material is still based on refractory product of shaping.But can predict, the advanced degree of the support of national policy, wide market prospects, technology is all that the develop and spread of this product provides powerful support.The appearance of this product and technology, will substitute original application to refractory to a certain extent in manufacture of cement industry, industrialization prospect is wide.This project reaches postpartum completely, can produce 30,000 tons of these products year, can meet 80-100 bar cement rotary kiln and use.
The above, it is only preferred embodiment of the present invention, be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be combined, change or retrofit and be Equivalent embodiments of the present invention.Everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (4)
1. an energy saving cement inner liner of rotary kiln, comprises kiln body, with inner liner on kiln body inwall, it is characterized in that inner liner is built by laying bricks or stones by preformed bricks and castable interval and forms; Preformed bricks comprises working face body and non-working surface body, and in the non-working surface body and castable of preformed bricks, embed the adiabatic flaggy of low heat conduction respectively, the low heat conduction heat insulation layer in non-working surface body and the low heat conduction heat insulation layer staggered floor in kiln body in castable distribute;
The interior pre-buried anchoring piece of preformed bricks; Preformed bricks and castable are connected and fixed by anchoring piece and kiln body;
Preformed bricks side is provided with groove, and castable embeds in groove and is connected and fixed with preformed bricks;
The percent mass of the working face body of preformed bricks is composed as follows:
2., according to energy saving cement inner liner of rotary kiln according to claim 1, it is characterized in that the non-working surface body of preformed bricks adopts light heat-insulating material.
3., according to energy saving cement inner liner of rotary kiln according to claim 1, it is characterized in that the percent mass of castable is composed as follows:
4., according to the brick-building art of the energy saving cement inner liner of rotary kiln described in claim 1 or 2 or 3, it is characterized in that comprising the steps:
(1) rotary kiln in all kiln footpaths be all that relative axisymmetric shape arranges four road reinforcing bands by the preformed bricks of band anchoring piece along axis, respectively reserves reducing end to end and to construct Distance geometry space;
(2) according to different kiln footpath, in conjunction with the total line number of building brick by laying bricks or stones drafted with reasonably build tolerance by laying bricks or stones, determine each size of preformed bricks and castable, and then determine the size of fore shaft brick;
(3), when building by laying bricks or stones, first draw line vertically, determine Article 1 reinforcing band and carry out welding building construction;
(4), after treating the construction of Article 1 reinforcing band, then once built the line number should built by laying bricks or stones between twice reinforcing band by laid dry method by laying bricks or stones, then carried out the construction of second reinforcing band, the like;
(5) during last time brick, reinforcing band and the space fore shaft brick of building by laying bricks or stones between brick locked, construct complete.
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| CN111807820B (en) * | 2020-07-18 | 2022-09-09 | 山东鲁铭新型材料股份有限公司 | Preparation method of composite prefabricated part lining for high-temperature lime rotary kiln |
| CN112050623A (en) * | 2020-08-10 | 2020-12-08 | 巩义市大润昌耐火材料有限公司 | Composite prefabricated member for lining of lime kiln and manufacturing method thereof |
| CN115650747B (en) * | 2022-11-16 | 2023-12-15 | 鞍山钢铁冶金炉材科技有限公司 | Magnesia-hercynite steel ladle wall gunning material and preparation method thereof |
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Address after: Wang Zhoucun towns Xi Yang Xi village 255300 Shandong city of Zibo province No. 1688 Patentee after: Shandong Lu Ming high temperature materials Limited by Share Ltd Address before: The Southern District of Zhoucun Xi Yang Xi Wang Cun village 255321 Shandong city of Zibo Province Patentee before: Shandong Luming High-temperature Material Technology Co., Ltd. |
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Address after: 255300 1688 Xiyang village, Wang Cun town, Zhoucun District, Zibo, Shandong Patentee after: Shandong Luming New Material Co.,Ltd. Address before: 255300 1688 Xiyang village, Wang Cun town, Zhoucun District, Zibo, Shandong Patentee before: SHANDONG LUMING HIGH-TEMPERATURE MATERIAL CO.,LTD. |