CN218210694U - Novel ultra-wide tunnel kiln applied to roasting lithium ores - Google Patents
Novel ultra-wide tunnel kiln applied to roasting lithium ores Download PDFInfo
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- CN218210694U CN218210694U CN202222407101.3U CN202222407101U CN218210694U CN 218210694 U CN218210694 U CN 218210694U CN 202222407101 U CN202222407101 U CN 202222407101U CN 218210694 U CN218210694 U CN 218210694U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 42
- 238000001354 calcination Methods 0.000 claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims description 81
- 239000010959 steel Substances 0.000 claims description 81
- 230000009970 fire resistant effect Effects 0.000 claims description 43
- 238000004321 preservation Methods 0.000 claims description 26
- 229920000742 Cotton Polymers 0.000 claims description 15
- 230000005484 gravity Effects 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 7
- 239000011449 brick Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 235000019362 perlite Nutrition 0.000 claims description 3
- 239000010451 perlite Substances 0.000 claims description 3
- 238000003306 harvesting Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000004927 clay Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052629 lepidolite Inorganic materials 0.000 description 2
- 229910052642 spodumene Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
The utility model relates to a be applied to novel super wide body tunnel cave of lithium ore calcination, its characteristics lie in including super wide body tunnel cave body, wherein have seted up the calcination chamber on the super wide body tunnel cave body to make the front and back end in calcination chamber run through respectively to the front and back of super wide body tunnel cave body on the surface, the transverse width in calcination chamber is 4 ~ 16 meters, be provided with 6 ~ 24 last nozzles that transversely arrange side by side on the last chamber wall in calcination chamber. The utility model has the advantages of large working section, high productivity, high reliability, high roasting quality, high lithium extraction rate, small management difficulty, strong applicability and the like.
Description
Technical Field
The utility model relates to a lithium ore deposit calcination technical field, especially a be applied to tunnel cave of lithium ore deposit calcination.
Background
At present, the roasting technical field of lithium ore and lithium-containing clay (raw ore and concentrate containing lepidolite, spodumene or/and lithium clay or lithium-containing industrial tailings thereof) adopts a tunnel kiln based on a traditional ceramic tunnel kiln, and the tunnel kiln is applied to roasting of lithium ore and cannot meet the requirement of expanding the capacity due to the narrow structural section of the tunnel kiln which is not more than 3.5 meters. Because the combustion system of the existing narrow tunnel kiln only adopts a mode of arranging burners on the side wall, the flame coverage length cannot exceed 4.0 m, otherwise, a large horizontal temperature difference can be generated, and the subsequent lithium extraction process is adversely affected, so that the width of the kiln is limited. If the capacity is enlarged, the aim can be achieved only by increasing the length of the kiln or increasing the number of the kilns and increasing the number of the kiln cars, which obviously increases the investment of upstream customers on fields, workshops and kilns, the management difficulty of production and is difficult to adapt to the requirement of the market on the rapid development of lithium ore roasting. Therefore, it is necessary to redesign the tunnel kiln facing the lithium ore firing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve above-mentioned problem and not enough, provide a be applied to novel super broad tunnel cave of lithium ore calcination, this novel super broad tunnel cave has that work section is big, the productivity is high, the reliability is high, calcination high quality is high, can improve the lithium rate of carrying, the management degree of difficulty is little, the suitability advantage such as strong.
The technical scheme of the utility model is realized like this:
the utility model provides a be applied to novel super wide body tunnel cave of lithium ore calcination which characterized in that includes super wide body tunnel cave body, wherein has seted up the calcination chamber on the super wide body tunnel cave body to make the front and back end in calcination chamber run through respectively to the front and back of super wide body tunnel cave body on the surface, the transverse width in calcination chamber is 4 ~ 16 meters, be provided with 6 ~ 24 last nozzles that transversely arrange side by side on the upper chamber wall in calcination chamber.
Preferably, the ultra-wide tunnel kiln body comprises a kiln top and two kiln walls, wherein the two kiln walls are arranged side by side from left to right, the kiln top comprises a double-layer steel frame, a light-weight fire-resistant layer, a first heat-preserving layer and a light-weight pouring layer, the left end and the right end of the double-layer steel frame are respectively connected with the upper ends of the two kiln walls, the light-weight fire-resistant layer is hung below the double-layer steel frame, the left end and the right end of the light-weight fire-resistant layer are respectively connected with the two kiln walls, the light-weight fire-resistant layer and the two kiln walls jointly enclose to form a roasting cavity, and the first heat-preserving layer and the light-weight pouring layer are sequentially arranged on the top surface of the light-weight fire-resistant layer; each upper burner is arranged on the double-layer steel frame, and the fire-jet ports of the upper burners are arranged in the roasting cavity in a penetrating manner.
Preferably, the kiln wall comprises a fire-resistant inner layer, a second heat-insulating layer and a steel frame outer layer, the fire-resistant inner layer, the second heat-insulating layer and the steel frame outer layer are sequentially stacked together, the upper end of the fire-resistant inner layer is connected with the end part of the light fire-resistant layer, and the upper end of the steel frame outer layer is connected with the end part of the double-layer steel frame.
Preferably, the refractory inner layer is a light refractory standard brick with the specific gravity of 0.8-1.6T/m and is subjected to thin-wall transformation, and the thickness of the refractory inner layer is 330-700 mm; the second heat preservation layer is a heat preservation cotton blanket, a heat preservation cotton felt, a heat preservation cotton plate or a heat preservation cotton block which are used for carrying out high-speed transportation at a specific gravity of 0.080-0.250T/m.
Preferably, the kiln wall further comprises an overhead steel frame, the lower ends of the fire-resistant inner layer and the second heat-insulating layer are pressed on the top surface of the overhead steel frame, and the lower end of the outer layer of the steel frame is connected with the top of the overhead steel frame.
Preferably, the top surface of the second heat-insulating layer is higher than the top surface of the fire-resistant inner layer, a bearing notch is formed in the upper side edge of the fire-resistant inner layer, the end portion of the light fire-resistant layer is overlapped on the bearing notch, the first heat-insulating layer covers the top surface of the fire-resistant inner layer, the end face of the first heat-insulating layer is attached to the second heat-insulating layer, and the end face of the light pouring layer is attached to the second heat-insulating layer.
Preferably, the light refractory layer is a light refractory hanging brick with a specific gravity of 0.8T/m, and the thickness of the light refractory layer is 300-530 mm.
Preferably, the first heat preservation layer is a heat preservation cotton blanket with the specific gravity of 0.128T/m for high harvest; the light casting layer is a perlite light casting layer.
Preferably, at least one left burner is arranged on the left cavity wall of the roasting cavity, and at least one right burner is arranged on the right cavity wall of the roasting cavity.
Preferably, the roasting cavity comprises a preheating section and a middle-high temperature section which are communicated with each other, each left burner and each right burner are located in the preheating section, and each upper burner is located in the middle-high temperature section.
The utility model has the advantages that: the novel ultra-wide tunnel kiln adopts a roasting cavity with the width of 4-16 meters. The roasting cavity has an ultra-wide width, which can facilitate the improvement of the production capacity of the tunnel kiln and ensure the roasting quality. Like this when the productivity needs to be enlargied, just need not make the kiln overlength, need not increase the quantity of kiln car to can not increase the investment of upper reaches customer to place, workshop and kiln, and can avoid increasing the production management degree of difficulty, can reach the purpose of simplifying the technology overall arrangement and reduce the bare-brother factory building investment, this novel super wide body tunnel cave can adapt to the requirement of market to the rapid development of lithium mine calcination.
Through be provided with 6 ~ 24 last nozzles that transversely arrange side by side on the upper chamber wall in calcination chamber, this can be convenient for provide stable, even heat in to the calcination chamber to can guarantee that the calcination quality of lithium ore is very high, and then help improving and carry the lithium rate, this novel super broad tunnel cave's reliability is very high.
The novel ultra-wide tunnel kiln has the advantages of large working section, high productivity, high reliability, high roasting quality, capability of improving the lithium extraction rate, small management difficulty, strong applicability and the like.
Drawings
Fig. 1 is a schematic structural view of the novel medium-sized ultra-wide tunnel kiln of the present invention.
Fig. 2 is a schematic diagram of the distribution structure of the middle burner of the present invention.
Detailed Description
As shown in fig. 1, a be applied to novel super broad body tunnel cave of lithium ore calcination, including super broad body tunnel cave body 10, wherein seted up calcination chamber 101 on the super broad body tunnel cave body 10 to make the front and back end in calcination chamber 101 run through respectively to the front and back of super broad body tunnel cave body 10 on the surface, the transverse width in calcination chamber 101 is 4 ~ 16 meters, be provided with 6 ~ 24 last nozzles 20 that transversely arrange side by side on the last chamber wall in calcination chamber 101.
The novel ultra-wide tunnel kiln is provided with a roasting cavity 101 with the width of 4-16 m. The roasting cavity 101 has an ultra-wide width, which facilitates the improvement of the productivity of the tunnel kiln and the guarantee of the roasting quality. Like this when the productivity needs to be enlargied, just need not make the kiln overlength, need not increase the quantity of kiln car to can not increase the investment of upper reaches customer to place, workshop and kiln, and can avoid increasing the production management degree of difficulty, can reach the purpose of simplifying the technology overall arrangement and reduce the bare-brother factory building investment, this novel super wide body tunnel cave can adapt to the requirement of market to the rapid development of lithium mine calcination.
Through be provided with 6 ~ 24 horizontal last nozzles 20 of arranging side by side on the upper chamber wall in calcination chamber 101, this can be convenient for provide stable, even heat in to calcination chamber 101 to can guarantee that the calcination quality of lithium ore is very high, and then help improving and carry the lithium rate, the reliability of this novel super broad tunnel cave is very high.
The novel ultra-wide tunnel kiln has the advantages of large working section, high productivity, high reliability, high roasting quality, small management difficulty, strong applicability and the like, and can improve the lithium extraction rate.
As shown in fig. 1, in the actual manufacturing process, the number of the upper burners 20 increases as the number of the firing chambers 101 increases. For example, the following configuration is adopted: 6 pieces are adopted when the width is 4 meters; the width of 5 meters is 7; the width of the bag is 6 meters and 8 bags are adopted; the width of 7 meters is 9; 10 pieces are adopted when the width is 8 meters; the width is 9 meters and 11 pieces are adopted; 12 pieces are adopted when the width is 10 meters; the width of the bag is 11 meters, and 14 bags are adopted; 16 pieces are adopted when the width is 12 meters; 18 pieces are adopted when the width is 13 meters; 20 pieces are adopted when the width is 14 meters; 22 pieces are adopted for 15 meters in width; 24 pieces are adopted for the width of 16 meters. And the spacing between each adjacent upper burner 20 is made equal. Thus, the uniformity of heat supply can be ensured, and the roasting quality can be ensured to be very high. Of course, the configuration is not limited to the above-mentioned configuration.
In the actual manufacturing process, a plurality of rows of upper burner groups are arranged in the front-back direction of the roasting cavity 101, the upper burners 20 in each upper burner group are arranged side by side in the transverse direction, and the number of the upper burners 20 in each upper burner group is the same. This makes it possible to supply heat to the roasting chamber 101 more stably and uniformly, thereby ensuring a high roasting quality.
The novel ultra-wide tunnel kiln can be used for roasting lithium ore and lithium-containing clay (raw ore and concentrate containing lepidolite, spodumene or/and lithium clay or lithium-containing industrial tailings thereof).
As shown in fig. 1, the ultra-wide tunnel kiln body 10 comprises a kiln top 1 and two kiln walls 2, wherein the two kiln walls 2 are arranged side by side from left to right, the kiln top 1 comprises a double-layer steel frame 11, a light-weight fire-resistant layer 12, a first heat-insulating layer 13 and a light-weight pouring layer 14, the left end and the right end of the double-layer steel frame 11 are respectively connected with the upper ends of the two kiln walls 2, the light-weight fire-resistant layer 12 is hung below the double-layer steel frame 11, the left end and the right end of the light-weight fire-resistant layer 12 are respectively connected with the two kiln walls 2, the light-weight fire-resistant layer 12 and the two kiln walls 2 jointly enclose to form a roasting cavity 101, and the first heat-insulating layer 13 and the light-weight pouring layer 14 are sequentially arranged on the top surface of the light-weight fire-resistant layer 12; the upper burners 20 are arranged on the double-layer steel frame 11, and the fire nozzles of the upper burners 20 are arranged in the roasting cavity 101 in a penetrating mode.
Through making super wide body tunnel cave body 10 adopt above-mentioned structure, can guarantee that double-deck steelframe 11 has very high structural strength, thereby can be convenient for produce super wide double-deck steelframe 11, and can guarantee that double-deck steelframe 11 has very high hoist and mount ability, it is strong to make wide sectional calcination chamber obtain the rigidity, it is little to warp, firm structural support, this just can be convenient for produce super wide kiln crown 1, this just can guarantee that calcination chamber 101 width is 4 ~ 16 meters novel super wide body tunnel cave has very high structural strength, thereby help improving the reliability and the life of this novel super wide body tunnel cave. Through the light refractory layer 12, a very good heat-resistant effect can be achieved, so that the condition that the kiln top 1 is damaged at high temperature is avoided, and the service life of the novel ultra-wide tunnel kiln is prolonged. Through the setting on first heat preservation layer 13 and light pouring layer 14, can play dual heat preservation and thermal-insulated effect to enable kiln top 1 to have very good heat preservation, thermal-insulated effect, this can not only reduce heat loss, guarantee going on fast, the reduction energy consumption of production operation, can also avoid workshop environment and workman to receive the influence healthily, the reliability and the security of this novel super wide body tunnel kiln are very good. Through adopting light flame retardant coating 12 and light pouring layer 14, this enables light flame retardant coating 12 and light pouring layer 14 all to have lighter weight, and this can not only guarantee that this novel super broad tunnel cave has very high reliability, can also do benefit to and build out super wide tunnel cave. Through will go up nozzle 20 and set up on double-deck steelframe 11, this can guarantee that the installation location of nozzle 20 is very reliable and stable, and this can not only guarantee that the calcination can go on steadily, can also improve the life of this novel super wide body tunnel cave.
The double-layer steel frame 11 is strong in support, not prone to deformation and capable of adapting to an ultra-wide kiln body, and therefore the ultra-wide tunnel kiln can be manufactured conveniently.
As shown in fig. 1, the kiln wall 2 includes a fire-resistant inner layer 21, a second insulating layer 22, and a steel frame outer layer 23, the fire-resistant inner layer 21, the second insulating layer 22, and the steel frame outer layer 23 are sequentially stacked together, the upper end of the fire-resistant inner layer 21 is connected to the end of the light fire-resistant layer 12, and the upper end of the steel frame outer layer 23 is connected to the end of the double-layer steel frame 11. Therefore, the kiln wall 2 can have good fire resistance and heat insulation performance, the tunnel kiln has good sealing performance, the kiln wall 2 can have high structural strength, heat loss can be reduced, the rapid production operation can be guaranteed, energy consumption can be reduced, the workshop environment and worker health can be prevented from being influenced, and the reliability and safety of the novel ultra-wide tunnel kiln can be further improved.
The fire-resistant inner layer 21 is a light fire-resistant standard brick with the specific gravity of 0.8-1.6T/m for high flowering, and the thickness of the fire-resistant inner layer 21 is 330-700 mm. Therefore, the fireproof inner layer 21 has good fireproof performance, and the kiln top has light weight, so that the reliability and the applicability of the novel ultra-wide tunnel kiln are further improved.
The second heat-insulating layer 22 is a heat-insulating cotton blanket, a heat-insulating cotton felt, a heat-insulating cotton plate or a heat-insulating cotton block with the specific gravity of 0.080-0.250T/m. This enables the second insulating layer 22 to have a very good insulating property, thereby contributing to further improving the reliability of the novel ultra-wide tunnel kiln.
As shown in fig. 1, the kiln wall 2 further comprises an overhead steel frame 24, the lower ends of the inner refractory layer 21 and the second insulating layer 22 are pressed on the top surface of the overhead steel frame 24, and the lower end of the outer steel frame layer 23 is connected with the top of the overhead steel frame 24. Through the arrangement of the overhead steel frame 24, the bottom of the kiln car can be cooled in the roasting process, so that the heat expansion and blocking of the wheels of the kiln car are prevented, and smooth production is ensured.
As shown in fig. 1, the overhead steel frame 24 is a rectangular frame structure. Therefore, the support device not only can play a very reliable supporting role, but also can play a very good overhead role.
By adopting the structure of steel frame and fire-resistant layer in the kiln top 1 and the kiln wall 2 and adopting the overhead steel frame 24, the tunnel kiln can be constructed quickly and conveniently on site, the maintenance cost is low and the service life is long.
As shown in fig. 1, the top surface of the second insulating layer 22 is higher than the top surface of the fire-resistant inner layer 21, a bearing notch 211 is formed in the upper side edge of the fire-resistant inner layer 21, the end portion of the light fire-resistant layer 12 is lapped on the bearing notch 211, the first insulating layer 13 covers the top surface of the fire-resistant inner layer 21, the end surface of the first insulating layer 13 is attached to the second insulating layer 22, and the end surface of the light pouring layer 14 is attached to the second insulating layer 22. Can not only play very good supporting effect to kiln crown 1 like this, can also make and form very reliable being connected between kiln crown 1 and the kiln wall 2, avoid the heat to flow from the junction of kiln crown 1 and kiln wall 2 to enable this novel super wide body tunnel cave to have better thermal-insulated, heat preservation effect, and then help further improving this novel super wide body tunnel cave's reliability. Through making the top surface of second heat preservation 22 be higher than the top surface of fire-resistant inlayer 21, this can not only be convenient for first heat preservation 13 and second heat preservation 22 direct contact, can also make things convenient for the pouring of light pouring layer 14 to can make things convenient for the construction of novel super wide body tunnel cave.
As shown in fig. 1, the top surface of the lightweight refractory layer 12 and the top surface of the refractory inner layer 21 are in the same plane. This can be favorable to laying of first heat preservation 13 and be favorable to the pouring of light pouring layer 14 to guarantee that the junction is very reliable, thereby help further improving the reliability of this novel super wide body tunnel cave.
The light fire-resistant layer 12 is a light fire-resistant hanging brick with the specific gravity of 0.8T/m and is obtained by carrying out high-speed dry distillation on the top of the lightweight fire-resistant layer 12, wherein the thickness of the lightweight fire-resistant layer 12 is 300-530 mm. This enables the lightweight refractory layer 12 to have very good fire resistance, thereby contributing to further improving the reliability and applicability of the novel ultra-wide tunnel kiln.
The first heat preservation layer 13 is heat preservation cotton blanket with the specific gravity of 0.128T/m. Therefore, the first heat-insulating layer 13 has very good heat-insulating property, and the reliability of the novel ultra-wide tunnel kiln is further improved.
The light casting layer 14 is a perlite light casting layer. Therefore, the light pouring layer 14 has very good fire resistance and heat insulation performance, and the reliability of the novel ultra-wide tunnel kiln is further improved.
As shown in fig. 1, the double-deck steel frame 11 includes an upper steel frame 111, a lower steel frame 112, a left support frame 113, a right support frame 114, a plurality of vertical pull rods 115, and a plurality of diagonal pull rod sets 116, the upper steel frame 111 is disposed above the lower steel frame 112, the upper and lower ends of the left support frame 113 are respectively connected to the left end of the upper steel frame 111 and the left end of the lower steel frame 112, the upper and lower ends of the right support frame 114 are respectively connected to the right end of the upper steel frame 111 and the right end of the lower steel frame 112, the vertical pull rods 115 are transversely disposed side by side between the upper steel frame 111 and the lower steel frame 112, the upper and lower ends of the vertical pull rods 115 are respectively connected to the upper steel frame 111 and the lower steel frame 112, the diagonal pull rod sets 116 include two splayed diagonal pull rods 1161, each diagonal pull rod set 116 is disposed at an interval from each vertical pull rod 115, the upper end of the diagonal pull rod 1161 in each diagonal pull rod set 116 is connected to the upper steel frame 111, the lower end of the diagonal pull rod 1161 in each diagonal pull rod set 116 is connected to the lower end of the corresponding diagonal steel frame 115 or the lower steel frame 112, and the upper and lower end of the diagonal steel frame 112 of the light-wall 112 is connected to the lower steel frame 112, and the light-wall 112. Enable double-deck steelframe 11 like this and have very high structural strength to can produce the double-deck steelframe 11 of super large span and indeformable, and can guarantee that this double-deck steelframe 11 has very high hoist and mount ability, and then can guarantee that double-deck steelframe 11, light flame retardant coating 12 and the installation on first heat preservation 13 are very reliable and stable, and this helps further improving the reliability of this double-deck steelframe 11 structure.
As shown in fig. 1, the end of the lower steel frame 112 is connected to the upper end of the steel frame outer layer 23. Therefore, the method can play a very good role in supporting and reinforcing and can be convenient for the construction of each fire-resistant layer and each heat-insulating layer.
As shown in fig. 1, the lightweight refractory layer 12 is suspended on the lower steel frame 112 through a plurality of hooks 50, the first heat-insulating layer 13 is laid on the top surface of the lightweight refractory layer 12, and the lightweight casting layer 14 is cast on the top surface of the first heat-insulating layer 13, so that the construction requirement can be well met.
As shown in fig. 1, at least one left burner 30 is disposed on a left wall of the roasting chamber 101, and at least one right burner 40 is disposed on a right wall of the roasting chamber 101. All set up the nozzle on the wall with controlling the chamber through the last wall at calcination chamber 101, can provide more sufficient in the super wide body tunnel cave like this, even heat, and the nozzle that adopts the low discharge just can satisfy the demand of calcination, need not to adopt large-traffic nozzle, thereby can avoid nozzle ambient temperature too high, this can avoid the serious uneven condition of heat to appear in the calcination chamber 101, thereby help further improving the quality of calcination, and then can further improve the rear end and carry the lithium rate, this reliability that helps further improving this novel super wide body tunnel cave.
As shown in fig. 1, the left burner 30 and the right burner 40 are respectively arranged on the corresponding steel frame outer layer 23, and the flame ports of the left burner 30 and the right burner 40 are all arranged in the roasting cavity 101 in a penetrating manner. Through setting up left nozzle 30, right nozzle 40 respectively on the steelframe skin 23 that corresponds, this installation location that can guarantee left nozzle 30, right nozzle 40 is very reliable and stable, and this can not only guarantee that the calcination can go on steadily, can also improve the life of this novel super wide body tunnel cave.
As shown in fig. 1 and fig. 2, the roasting chamber 101 includes a preheating section 102 and an intermediate-high temperature section 103 which are communicated with each other, each left burner 30 and each right burner 40 are located in the preheating section 102, and each upper burner 20 is located in the intermediate-high temperature section 103. The combustion products and the flue gas of all burners are uniformly distributed in the horizontal direction and the vertical direction of the whole roasting cavity 101, so that the roasting cavity temperature difference of a wide-section kiln is overcome, the roasting quality can be greatly improved, and the reliability of the novel ultra-wide tunnel kiln is further improved.
The burner nozzles are reasonably arranged on the kiln top 1 and the kiln wall 2. The requirement of actual use can not only be satisfied, the installation location that can also guarantee each nozzle is very reliable and stable on the steel construction of the kiln body, and each nozzle evenly distributed makes the even conduction of the heat of flame and flue gas on goods around the kiln car load, makes goods even firing be heated, and the calcination chamber difference in temperature is little, and the quality of goods is more reliable and more stable.
The burners are controlled in groups according to the thermal process requirements, the upper burners 20 are distributed in the middle-high temperature section 102 of the kiln, and each group comprises 6 to 24 burners. Each left burner 30 and each right burner 40 are distributed in the preheating section 101, and each group comprises 2-8 burners. Every nozzle all has combustion-supporting air system, and the system is sent into to fuel to the ratio of adjustable air and fuel, flame exit center is installed in the flame path that kiln car pile up neatly was reserved, and flame contactless goods or kiln body avoid flame impulsive force to influence thermal-insulated, insulation construction, and this can guarantee that novel super wide body tunnel cave has very long life.
And each burner adopts a small-flow burner, and the flow of each burner is 3-15 ten thousand kilocalories per hour. And the flow of each burner is gradually increased according to the direction from the preheating section 102 to the middle-high temperature section 103, so that the sectional temperature control can be realized. The method can not only avoid overheating around the burner, but also achieve the purpose of gradually increasing the roasting temperature, thereby ensuring that the roasting quality is very good.
All burners can realize automatic temperature control through flame monitoring, PID, PLC, industrial PC and the like, so that the temperature of the roasting cavity is stably controlled, and the energy consumption is reduced.
The kiln wall 2 and the kiln top 1 are supported by steel structures:
the bottom support steel structure and the side wall steel structure of the kiln wall 2 are made of standard section steel, such as square tubes, angle steel, channel steel, I-shaped steel and the like, and are connected through welding and/or bolts.
The overhead steel frame 24 has a certain width, the thickness of the overhead steel frame is similar to the thickness of the fireproof inner layer 21 and the second heat insulation layer 22, and the fireproof inner layer 21 and the second heat insulation layer 22 are built on the overhead steel frame 24. The lower part of the overhead steel frame 24 is hollow, so that the space at the bottom of the kiln car is communicated with the atmosphere of the external environment, the temperature at the bottom of the kiln car can be effectively reduced, and a wheel running system of the kiln car is protected.
The outer 23 symmetric distribution in the kiln body both sides of steelframe on two kiln walls 2, their top links together through modes such as welding, lacing wire, riveting with the tip of double-deck steelframe 11, forms the whole of kiln body steel construction.
Double-deck steelframe 11 adopts double-deck shaped steel welded structure, in the middle of upper strata and lower floor's steel construction, the welding has the steel structure of drawing to one side to increase structural strength, overcome big sectional structural deformation, reduce the horizontal bending. The light refractory layer 12, the first heat preservation layer 13 and the light pouring layer 14 are suspended and fixed on the lower-layer section steel of the kiln top steel structure through the lifting hooks 50. This makes it possible to obtain a very reliable roof 1.
Use of an overhead combustion system, or in combination with a side-mounted combustion system:
a plurality of groups of burners are arranged on the kiln wall 2 of the preheating section 101, the height of the burners is positioned in the range above the table surface of the kiln car and within the loading height of the kiln car, and the burners are distributed in a bilateral symmetry or cross shape.
In the middle-high temperature section 102 of the kiln, a plurality of groups of burners are arranged on the kiln top 1, each group comprises 6-20 burners and is distributed in the width direction of the roasting cavity 101, so that the whole roasting cavity 101 is uniformly heated in the width direction.
All burners are arranged in a flame channel reserved during stacking of the tunnel kiln car, and the flame of the burners cannot directly contact with a kiln car load.
Each group or a plurality of groups of burners form a combustion control unit, and all the combustion control units are combined into a combustion control system.
The combustion system of the tunnel kiln may include only the overhead combustion system.
The combustion system can realize automatic control through a computer or an industrial PC, a PLC and a PID technology.
After the novel ultra-wide tunnel kiln adopts the structure, the length of the roasting cavity 101 is 80-300 meters, the roasting temperature is 800-1200 ℃, and the roasting period is 6-24 hours. The single-line capacity of the ultra-wide tunnel kiln can reach more than 3 times of that of the existing narrow tunnel kiln under the condition of the same length, the roasting process requirement can be well met, the temperature difference is small, the energy consumption is low, the rear-end lithium extraction rate can be improved, the process layout is simplified, the management difficulty is reduced, the land factory building investment is reduced, and therefore the actual use requirement can be well met.
Claims (10)
1. The utility model provides a be applied to novel super broad body tunnel cave of lithium ore calcination which characterized in that: the ultra-wide tunnel kiln comprises an ultra-wide tunnel kiln body (10), wherein a roasting cavity (101) is formed in the ultra-wide tunnel kiln body (10), the front end and the rear end of the roasting cavity (101) are respectively penetrated to the front surface and the rear surface of the ultra-wide tunnel kiln body (10), the transverse width of the roasting cavity (101) is 4-16 m, and 6-24 upper burners (20) which are transversely arranged side by side are arranged on the upper cavity wall of the roasting cavity (101).
2. The novel ultra-wide tunnel kiln applied to lithium ore roasting according to claim 1, characterized in that: the ultra-wide tunnel kiln body (10) comprises a kiln top (1) and two kiln walls (2), wherein the two kiln walls (2) are arranged side by side from left to right, the kiln top (1) comprises a double-layer steel frame (11), a light fire-resistant layer (12), a first heat-preserving layer (13) and a light pouring layer (14), the left end and the right end of the double-layer steel frame (11) are respectively connected with the upper ends of the two kiln walls (2), the light fire-resistant layer (12) is hung below the double-layer steel frame (11), the left end and the right end of the light fire-resistant layer (12) are respectively connected with the two kiln walls (2), the light fire-resistant layer (12) and the two kiln walls (2) jointly enclose to form a roasting cavity (101), and the first heat-preserving layer (13) and the light pouring layer (14) are sequentially arranged on the top surface of the light fire-resistant layer (12); each upper burner (20) is arranged on the double-layer steel frame (11), and the fire nozzle of each upper burner (20) is arranged in the roasting cavity (101) in a penetrating way.
3. The novel ultra-wide tunnel kiln applied to lithium ore roasting according to claim 2, characterized in that: the kiln wall (2) comprises a fireproof inner layer (21), a second heat insulation layer (22) and a steel frame outer layer (23), wherein the fireproof inner layer (21), the second heat insulation layer (22) and the steel frame outer layer (23) are sequentially stacked together, the upper end of the fireproof inner layer (21) is connected with the end part of the light fireproof layer (12), and the upper end of the steel frame outer layer (23) is connected with the end part of the double-layer steel frame (11).
4. The novel ultra-wide tunnel kiln applied to roasting of lithium ores as claimed in claim 3, wherein: the inner refractory layer (21) is a light refractory standard brick with the specific gravity of 0.8-1.6T/m, and the thickness of the inner refractory layer (21) is 330-700 mm; the second heat preservation layer (22) is a heat preservation cotton blanket, a heat preservation cotton felt, a heat preservation cotton plate or a heat preservation cotton block which have the specific gravity of 0.080-0.250T/m.
5. The novel ultra-wide tunnel kiln applied to roasting of lithium ores as claimed in claim 3, wherein: the kiln wall (2) further comprises an overhead steel frame (24), the lower ends of the fire-resistant inner layer (21) and the second heat-insulating layer (22) are pressed on the top surface of the overhead steel frame (24), and the lower end of the steel frame outer layer (23) is connected with the top of the overhead steel frame (24).
6. The novel ultra-wide tunnel kiln applied to lithium ore roasting of claim 3, characterized in that: the top surface of the second heat-insulating layer (22) is higher than the top surface of the fireproof inner layer (21), a bearing notch (211) is formed in the upper side edge of the fireproof inner layer (21), the end portion of the light fireproof layer (12) is overlapped on the bearing notch (211), the first heat-insulating layer (13) covers the top surface of the fireproof inner layer (21), the end face of the first heat-insulating layer (13) is attached to the second heat-insulating layer (22), and the end face of the light pouring layer (14) is attached to the second heat-insulating layer (22).
7. The novel ultra-wide tunnel kiln applied to lithium ore roasting according to claim 2, characterized in that: the light refractory layer (12) is a light refractory hanging brick with the specific gravity of 0.8T/m, and the thickness of the light refractory layer (12) is 300-530 mm.
8. The novel ultra-wide tunnel kiln applied to lithium ore roasting according to claim 2, is characterized in that: the first heat preservation layer (13) is a heat preservation cotton blanket with the specific gravity of 0.128T/m for high harvest; the light casting layer (14) is a perlite light casting layer.
9. The novel ultra-wide tunnel kiln applied to lithium ore roasting according to claim 1, characterized in that: the left wall of the roasting cavity (101) is provided with at least one left burner (30), and the right wall of the roasting cavity (101) is provided with at least one right burner (40).
10. The novel ultra-wide tunnel kiln applied to lithium ore roasting according to claim 9, is characterized in that: the roasting cavity (101) comprises a preheating section (102) and a middle-high temperature section (103) which are communicated with each other, each left burner (30) and each right burner (40) are located in the preheating section (102), and each upper burner (20) is located in the middle-high temperature section (103).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222407101.3U CN218210694U (en) | 2022-09-07 | 2022-09-07 | Novel ultra-wide tunnel kiln applied to roasting lithium ores |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222407101.3U CN218210694U (en) | 2022-09-07 | 2022-09-07 | Novel ultra-wide tunnel kiln applied to roasting lithium ores |
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| CN218210694U true CN218210694U (en) | 2023-01-03 |
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| CN202222407101.3U Expired - Fee Related CN218210694U (en) | 2022-09-07 | 2022-09-07 | Novel ultra-wide tunnel kiln applied to roasting lithium ores |
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| Country | Link |
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- 2022-09-07 CN CN202222407101.3U patent/CN218210694U/en not_active Expired - Fee Related
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