CN105039687A - Segment type rotary kiln set - Google Patents
Segment type rotary kiln set Download PDFInfo
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- CN105039687A CN105039687A CN201510434225.2A CN201510434225A CN105039687A CN 105039687 A CN105039687 A CN 105039687A CN 201510434225 A CN201510434225 A CN 201510434225A CN 105039687 A CN105039687 A CN 105039687A
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- rotary kiln
- heat storage
- roasting
- calcination
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- 239000000463 material Substances 0.000 claims abstract description 138
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000001354 calcination Methods 0.000 claims description 71
- 238000005338 heat storage Methods 0.000 claims description 57
- 230000004308 accommodation Effects 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000009997 thermal pre-treatment Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 238000002485 combustion reaction Methods 0.000 description 28
- 238000005516 engineering process Methods 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 13
- 239000000178 monomer Substances 0.000 description 13
- 238000007789 sealing Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 12
- 230000001172 regenerating effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000007599 discharging Methods 0.000 description 8
- 229910052759 nickel Inorganic materials 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 239000003517 fume Substances 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000009856 non-ferrous metallurgy Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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- 150000004760 silicates Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses a segment type rotary kiln set which comprises multiple roasting rotary kilns for roasting materials in a segmented mode. The roasting rotary kilns are sequentially connected in series. Each roasting rotary kiln comprises a first shell, a first rotary barrel, multiple heat accumulators and multiple first burners, wherein the first sell defines a first containing space, and the first rotary barrel is located in the first containing space and defines a material heating space; the heat accumulators comprise a material inlet end heat accumulator and a material outlet end heat accumulator and are located at the two ends of the first shell respectively in the material flowing direction; the first burners are embedded in the material heating space from the material inlet end heat accumulator and the material outlet end heat accumulator respectively. The segment type rotary kiln set is high in roasting temperature and thermal utilization rate, even in roasting, and low in energy consumption, and the temperature of each rotary kiln is adjustable.
Description
Technical field
The present invention relates to technical field of industrial furnaces, particularly, relate to a kind of sectional type rotary kiln group.
Background technology
Rotary kiln refers to rotary calcination kiln, and wherein lime rotary kiln is the kiln using roasting small particles material more widely, is applicable to being applied to the manufacturing enterprises such as iron and steel, calcium carbide chemical industry, non-ferrous metal.Tradition rotary kiln baking intensity is low, maturing temperature is low, and usually can not utilize or only can utilize on a small quantity the problem of low-heat value gas, and roasting energy consumption is high, roasting effect is uneven, the adaptability of material and the kind of product more single.
Therefore, rotary kiln haves much room for improvement.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, one object of the present invention is to propose a kind of sectional type rotary kiln group, and this sectional type rotary kiln group maturing temperature is high, and heat utilization efficiency is high, and roasting effect is even.
According to an aspect of the present invention, the invention provides a kind of sectional type rotary kiln group.According to embodiments of the invention, this sectional type rotary kiln group comprises the multiple calcination rotary kilns for carrying out baking inphases to material of connecting successively, and wherein, described calcination rotary kiln comprises: the first housing, and described first housing limits the first spatial accommodation; First pivotable cartridge, described first pivotable cartridge is positioned at described first spatial accommodation, and limits heating material space; Multiple heat storage, described multiple heat storage comprises material inlet end heat storage and material outlet end heat storage, along the direction of described Flow of Goods and Materials, lays respectively at the two ends of described first housing; And multiple first burner, described multiple first burner is embedded in described heating material space from described material inlet end heat storage and described material outlet end heat storage respectively.
According to embodiments of the invention, the maturing temperature of sectional type rotary kiln group of the present invention is high, and heat utilization efficiency is high, and roasting is even, and energy consumption is low, and the temperature of each rotary kiln is adjustable, thus, ensure that the adaptability of material and the diversity of product.
In addition, sectional type rotary kiln group according to the above embodiment of the present invention, can also have following additional technical characteristic:
According to embodiments of the invention, this sectional type rotary kiln group comprises further: preheating rotary kiln, for carrying out thermal pretreatment to described material before carrying out described sectional type roasting, wherein, described preheating rotary kiln comprises: the second housing, and described second housing limits the second spatial accommodation; Second pivotable cartridge, described second pivotable cartridge is positioned at described second spatial accommodation, and limits material preheating space; And second burner, described second burner is embedded in described material preheating space from described second housing.Thus, utilize preheating rotary kiln to dry and preheating material, the efficiency of combustion of material in calcination rotary kiln is high.
According to embodiments of the invention, described preheating rotary kiln and described multiple calcination rotary kiln be stepped arrangement from high to low successively along Flow of Goods and Materials direction.Thus, material, after the preheating rotary kiln preheating being positioned at highest point, by action of gravity, enters each calcination rotary kiln successively gradually downwards and carries out roasting.
According to embodiments of the invention, described first pivotable cartridge and described second pivotable cartridge are rotating Vortex.Thus, material rotates all in the same direction in the first pivotable cartridge and the second pivotable cartridge, thus material is heated evenly, and material roasting is even.
According to embodiments of the invention, the axis of described calcination rotary kiln and the axis of described preheating rotary kiln are respectively horizontal by the angle that 7 degree of-9 degree flows downward for material.Thus, the roasting time of material in each rotary kiln is shortened.
According to embodiments of the invention, be connected in series described in described multiple calcination rotary kiln be connected in series is undertaken by sealing-duct.
According to embodiments of the invention, in adjacent two described calcination rotary kilns, the described material inlet end heat storage vertical non-alignment of the described material outlet end heat storage being positioned at the described calcination rotary kiln of upstream and the described calcination rotary kiln that is positioned at downstream.
According to embodiments of the invention, the described sealing-duct being communicated with two adjacent described calcination rotary kilns in adjacent two described calcination rotary kilns between the described material outlet end heat storage of the described calcination rotary kiln of upstream and the described material inlet end heat storage of the described calcination rotary kiln in downstream.Thus, while space is built in saving, also certain insulation effect is played to the material in sealing-duct.
According to embodiments of the invention, multiple described first burner on each described calcination rotary kiln hockets heating.Thus, efficiency of combustion is high, and heat utilization efficiency is high.
According to embodiments of the invention, described first burner and described second burner are heat-storage type burner.Thus, efficiency of combustion is high.
According to the sectional type rotary kiln group of the embodiment of the present invention, at least there is one of following advantages:
(1) sectional type rotary kiln group of the present invention is by adopting Regenerative Combustion Technology, and using low-heat value gas as fuel, the efficiency of utilization of rotary kiln is high.
(2) by Regenerative Combustion Technology being combined with baking inphases technique, intensity of roasting height and roasting effect good stability, be applicable to process various materials, and can obtain different roasting products according to demand.
(3) sectional type rotary kiln group roasting time of the present invention is short, and energy consumption is low, output is high.Rotary kiln angle of inclination of the present invention is 7 ~ 9 degree, larger than 3 ~ 6 degree of traditional rotary kiln.This is mainly because after adopting heat storage type combustion, improve the intensity of roasting of monomer rotary kiln, thus material can reach identical roasting effect within the shorter time.With the increase at monomer rotary kiln angle of inclination, the movement velocity of material is accelerated, therefore, roasting time shortens, and then, contribute to the reduction of rotary kiln energy consumption and the raising of rotary kiln output, when monomer rotary kiln angle of inclination is 7 ~ 9 °, the comparable traditional rotary kiln of its output improves 10% ~ 20%.
(4) the present invention adopts sealing-duct to connect adjacent rotary kiln, avoids the secondary oxidation of material, effectively ensure that the quality of roasting material.
(5) sectional type rotary kiln of the present invention is reasonable in design, makes full use of the constitutional features of rotary kiln, and between adjacent heat storage sealing-duct being arranged at adjacent rotary kiln, thus the efficiency of utilization of rotary kiln is high.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows the structural representation of sectional type rotary kiln group according to an embodiment of the invention;
Fig. 2 shows the principle of work schematic diagram of sectional type rotary kiln group according to an embodiment of the invention;
Fig. 3 shows the principle of work schematic diagram of sectional type rotary kiln group according to an embodiment of the invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, term " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", the orientation of the instruction such as " end " or position relationship be based on orientation shown in the drawings or position relationship, be only the present invention for convenience of description instead of require that the present invention with specific azimuth configuration and operation, therefore must can not be interpreted as limitation of the present invention.
According to an aspect of the present invention, the invention provides a kind of sectional type rotary kiln group.Below with reference to Fig. 1, according to embodiments of the invention, this sectional type rotary kiln group is described in detail, this sectional type rotary kiln group comprises the multiple calcination rotary kilns for carrying out baking inphases to material of connecting successively, each calcination rotary kiln 1000 includes: the first housing 1100, first pivotable cartridge (not shown), multiple heat storage 1300 and multiple first burner 1200, wherein, the first housing 1100 limits the first spatial accommodation; First pivotable cartridge is positioned at the first spatial accommodation, and limits heating material space; Multiple heat storage 1300 comprises material inlet end heat storage 1310 and material outlet end heat storage 1320, along the direction of Flow of Goods and Materials, lays respectively at the two ends of the first housing 1100; Multiple first burner 1200 is embedded in heating material space from material inlet end heat storage 1310 and material outlet end heat storage 1320 respectively.
According to embodiments of the invention, Regenerative Combustion Technology combines with baking inphases technique by sectional type rotary kiln group of the present invention, carries out material and carries out roasting periodically continuously, maturing temperature is high, intensity of roasting is good, and the heat utilization efficiency of rotary kiln is high, and roasting is even, the roasting time of material is short, energy consumption is low, and the temperature of each rotary kiln is adjustable, thus, ensure that the adaptability of material and the diversity of product.According to embodiments of the invention, sectional type rotary kiln group of the present invention is applicable to process water-containing materials and siccative, by can be used for the direct-reduction of the ferrous materials such as nonferrous metallurgy slag, metallurgical dust, red soil nickel ore and refractory iron ore after coal blending, and can according to customer need, different maturing temperatures is set in monomer rotary kiln, to obtain qualified roasting material.
According to some embodiments of the present invention, heat storage uses special stupalith manufacture, thus have very large heat interchanging area and good thermal conduction, thermotolerance, thermo-efficiency is high.
According to some embodiments of the present invention, this sectional type rotary kiln group comprises further: preheating rotary kiln 2000, for carrying out thermal pretreatment to material before carrying out sectional type roasting, wherein, preheating rotary kiln comprises: the second housing 2100, second pivotable cartridge (not shown) and the second burner 2200, wherein, the second housing 2100 limits the second spatial accommodation; Second pivotable cartridge is positioned at the second spatial accommodation, and limits material preheating space; Second burner 2200 is embedded in material preheating space from the second housing 2100.Thus, for the material that water content is higher, when water content is greater than 2%, preheating rotary kiln can be utilized to dry and preheating material, thus the efficiency of combustion of material in calcination rotary kiln is high.
As shown in Figure 1, according to a particular embodiment of the invention, preheating rotary kiln 2000 and multiple calcination rotary kiln 1000 be stepped arrangement from high to low successively along Flow of Goods and Materials direction, stepped arrangement can ensure preheating rotary kiln 2000 and multiple calcination rotary kiln 1000 in the vertical direction not overlapping.Thus, material flows to the coupled calcination rotary kiln 1000 be positioned at below it from being positioned at highest point preheating rotary kiln 2000, and flows in the calcination rotary kiln 1000 of series connection from high to low.
According to a particular embodiment of the invention, the first pivotable cartridge and the second pivotable cartridge are rotating Vortex, and such as, the first pivotable cartridge and the second pivotable cartridge are to turn clockwise or be and are rotated counterclockwise.Thus, material roasting is even.
According to some embodiments of the present invention, the axis of calcination rotary kiln 1000 and the axis of preheating rotary kiln 2000 are respectively horizontal by the angle that 7 degree of-9 degree flows downward for material.Thus, rotary kiln angle of inclination of the present invention is larger than 3 ~ 6 degree of traditional rotary kiln.After the present invention adopts heat storage type combustion, improve the intensity of roasting of monomer rotary kiln, thus material can reach identical roasting effect within the shorter time.With the increase at monomer rotary kiln angle of inclination, the movement velocity of material is accelerated, and therefore roasting time shortens, and then, contribute to the reduction of rotary kiln energy consumption and the raising of rotary kiln output.If but the angle of the axis of rotary kiln and horizontal plane is greater than 9 degree, the clear angle of rotary kiln is excessive, the time of material preheating in rotary kiln, roasting is too short, namely non-thorough roasting discharges from rotary kiln, and when monomer rotary kiln angle of inclination is 7 ~ 9 °, material roasting time in rotary kiln is suitable, and the comparable traditional rotary kiln of output improves 10% ~ 20%.
According to some embodiments of the present invention, multiple calcination rotary kiln 1000 be connected in series is connected in series by sealing-duct 1400, is also connected by sealing-duct 1400 between calcination rotary kiln 1000 with preheating rotary kiln 2000.Thus, the good sealing effect of each calcination rotary kiln connecting tube, avoids material, in the transmittance process of each roasting rotary kiln, secondary oxidation occurs, thus, effectively ensure that the quality of roasting material.Meanwhile, rotary kiln shell does not rotate with the pivotable cartridge of its inside, thus is convenient to burner and is connected with its fuel feeding duct.
According to some embodiments of the present invention, sealing-duct 1400 is made up of high temperature resistant, corrosion resistant material.Thus, sealing-duct is not easily corroded by the high temperature highly corrosive material of delivered inside, the long service life of sealing-duct.
According to a particular embodiment of the invention, in adjacent two calcination rotary kilns 1000, material inlet end heat storage 1310 vertical non-alignment of the material outlet end heat storage 1320 being positioned at the calcination rotary kiln 1000 of upstream and the calcination rotary kiln 1000 being positioned at downstream.Thus, the material outlet end heat storage 1320 of adjacent upstream calcination rotary kiln aligns with material inlet end heat storage 1310 in the vertical direction of downstream calcination rotary kiln, space between above-mentioned two heat storages is under the radiation of heat storage heat, there is higher temperature, good insulation effect is had to the material transmitted between adjacent roasting rotary kiln, meanwhile, the arrangement space of rotary kiln group is also saved.
According to a particular embodiment of the invention, the sealing-duct 1400 being communicated with two adjacent calcination rotary kilns 1000 in adjacent two calcination rotary kilns 1000 between the material outlet end heat storage 1320 of the calcination rotary kiln 1000 of upstream and the material inlet end heat storage 1310 of the calcination rotary kiln 1000 in downstream.Thus, while space is built in saving, also certain insulation effect is played to the material in sealing-duct.
According to some embodiments of the present invention, multiple first burners 1200 on each calcination rotary kiln 1000 hocket heating.According to some embodiments of the present invention, can pass through programmable logic controller (PLC) and control the first burner 1200, realize alternately heating, loop cycle is 60 ~ 90 seconds.With reference to figure 2 and 3, to the first burner hocket heating principle explain, wherein, Fig. 2 is first burner combustion 1200 on right side, first burner 1200 in left side is discharged fume, and the first burner 1200 that Fig. 3 is left side burns, and first burner 1200 on right side is discharged fume.First burner 1200 is embedded in heating material space from heat storage 1300 by the present invention, first burner 1200 forms an entirety with the heat storage 1300 of its embedding, regenerative combustion technology is utilized to heat, kiln gas and the heat exchange entering stove combustion air is completed out, to reach the effect improving calcination rotary kiln 1000 thermo-efficiency and energy-saving and emission-reduction by heat storage 1300.Heat storage type combustion is carried out in the both sides that heat storage 1300 and the first burner 1200 are installed in roasting rotary kiln 1000, first burner 1200 of roasting rotary kiln 1000 both sides is all alternate combustion, i.e. side burning, opposite side is discharged fume, then timing is changed, make originally to discharge fume for the first burner 1200 burnt, and originally burnt for first burner 1200 of discharging fume, the cyclical operation constantly gone round and begun again.As shown in above-mentioned schematic diagram A, such as furnace temperature is 1280 degrees Celsius, and the burner A being positioned at first burner in left side is in smoke evacuation state, and temperature is that the high-temperature flue gas of 1280 degrees Celsius enters from heat storage 1300 head, discharges from afterbody.When flue gas flows through heat storage 1300, heat is absorbed by heat storage, and is stored by heat storage 1300, and the temperature of the flue gas of discharging from afterbody obviously reduces, and temperature can be less than 150 degrees Celsius.The burner B being positioned at first burner 1200 on right side is in state of combustion, and combustion air enters from heat storage afterbody, discharges from head.When air flows through heat storage 1300, heat storage 1300 heat release, air heating, by absorption of air, as in the present embodiment, can be 1200 degrees Celsius to high temperature (only lower than high-temperature flue gas 50 DEG C-100 DEG C) by heat, then participates in burning.After reversing valve commutation, as shown in Figure 3, the burner B being positioned at first burner 1200 on right side becomes smoke evacuation state, and the burner A being positioned at first burner 1200 in left side becomes state of combustion, completes the burning-exhaust process in second cycle.Contriver is surprised to find, heat storage and burner combine by the present invention, carry out heat storage type combustion, can have the following advantages one of at least: 1) adopt regenerative combustion technology the flue gas that roasting process produces can be used for pre-heating fuel and air, improve the temperature of combustion of fuel, reduce the exhaust temperature of flue gas, thus greatly increase the efficiency of utilization of fuel, decrease the quantity discharged of the pollutents such as NOX; 2) the first burner of both sides is adopted to hocket heating, while realizing heat smoke UTILIZATION OF VESIDUAL HEAT IN, also can improve the intensity of roasting of monomer rotary kiln, and traditional rotary kiln can only at kiln hood one-way heating, therefore only can preheating at kiln tail place material, roasting can not be realized, cause that the intensity of roasting of rotary kiln is low, maturing temperature is also lower, the present invention adopts Bidirectional heating, and the material being in kiln hood and kiln tail can carry out roasting, roasting effect to evenly; 3) multiple calcination rotary kiln is adopted, according to different demands, differentiation roasting can be realized at each calcination rotary kiln monomer by accurate control maturing temperature and roasting condition, realizes baking inphases, obtain the roasting effect needed, and then ensure that the adaptability of material and the diversity of product.
According to a particular embodiment of the invention, the first burner 1200 and the second burner 2200 are heat-storage type burner.Thus, efficiency of combustion is high.Thus, the combustion efficacy of burner is good, and the roasting time of material is short, less energy consumption, and output is high.
According to a particular embodiment of the invention, carrying roller 1500 pairs of preheating rotary kilns 2000 and calcination rotary kiln 1000 is utilized to support and transmission.Thus, the position and the angle that adjust preheating rotary kiln and calcination rotary kiln is as required convenient to.
With reference to figure 1, the general method of material in the roasting of sectional type rotary kiln group of the present invention is described, wherein, preheating rotary kiln 1000 is connected with secondary calcination rotary kiln, secondary calcination rotary kiln is connected with one-level calcination rotary kiln, secondary calcination rotary kiln is identical with the structure of one-level calcination rotary kiln, and concrete calcination steps is as follows:
(1) material feeds through the kiln tail of preheating rotary kiln 2000, completes oven dry, preheating, ensure that material moisture is less than 2% with being rotated in preheating rotary kiln 2000 of preheating rotary kiln 2000;
(2) after preheating, material under gravity, through sealing-duct 1400 discharging to secondary calcination rotary kiln, and carries out pre-burning with the pivotable cartridge of rotary kiln, the Preburning material obtained in secondary calcination rotary kiln;
(3) Preburning material is through the tightness system discharging of the kiln hood of two-stage rotary kiln to one-level rotary kiln, and in one-level rotary kiln, carries out roasting with the pivotable cartridge in one-level rotary kiln, the roasting material obtained.
Below with reference to specific embodiment, the present invention will be described, it should be noted that, these embodiments are only illustrative, and can not be interpreted as limitation of the present invention.
Below in conjunction with embodiment, the solution of the present invention is made an explanation.It will be understood to those of skill in the art that the following examples only for illustration of the present invention, and should not be considered as limiting scope of the present invention.Unreceipted concrete technology or condition in embodiment, according to the technology described by the document in this area or condition or carry out according to product description.
Embodiment 1:
In the present embodiment, three grades of rotary kilns are utilized to carry out roasting, these three grades of rotary structure schematic diagram as indicated with 1, three rotary kiln ends and kiln tail are joined end to end by tightness system, and arrange from high to low successively, three monomer rotary kiln angles of inclination are 7 °, and rotating Vortex, wherein preheating rotary kiln is only provided with burner at kiln hood, preheating rotary kiln is connected with two-stage rotary kiln, secondary calcination rotary kiln is connected with one-level calcination rotary kiln, secondary calcination rotary kiln is identical with the structure of one-level calcination rotary kiln, two-stage rotary kiln and one-level rotary kiln are respectively equipped with the regenerative high temperature combustion technology room be made up of heat storage and burner at two ends.Concrete steps are as follows:
(1) Copper making flotation tailings is allocated into reduction coal dust and additive, the TFe grade of this Copper making flotation tailings is 40%, and major impurity is silicates mineral.
(2) the above-mentioned material of step (1) is fed by the sealing kiln tail of feeding device from preheating rotary kiln, material moves to the direction of sealing kiln hood with the rotation of rotary kiln, by the burner on preheating rotary kiln, preheating is carried out to material, the tightness system be meanwhile made up of sealing kiln tail and sealing kiln hood then keeps static, obtains the material after preheating.
(3) material after preheating through the sealing-duct discharging of the kiln hood of preheating rotary kiln in two-stage rotary kiln, and the direction motion continued in two-stage rotary kiln to sealing kiln hood, and the sealing-duct of two-stage rotary kiln kiln hood also keeps static, the calcined temperature controlling two-stage rotary kiln is 1200 ~ 1250 DEG C, and pass through exchange accumulation of heat and the roasting of regenerative high temperature combustion technology room, two ends, continuous pre-burning is carried out to material, make the iron-bearing mineral in nonferrous metallurgy slag be become tiny iron granule by coal reduction gradually, thus obtain Preburning material.
(4) Preburning material through the sealing-duct discharging of two-stage rotary kiln kiln hood in one-level rotary kiln, and the direction motion continued in one-level rotary kiln to sealing kiln hood, the maturing temperature controlling one-level rotary kiln is 1250 ~ 1300 DEG C, by exchange accumulation of heat and the roasting of regenerative high temperature combustion technology room, two ends, continuous roasting is carried out to Preburning material, fine metal iron particle in Preburning material is grown up gradually, obtains roasting material.
(5) roasting material is discharged with the kiln hood being rotated in one-level rotary kiln of one-level rotary kiln, namely obtains roasting product.
The roasting product obtained by aforesaid method, after mill ore magnetic selection process, can obtain the metal iron powder of TFe grade more than 88%.In addition, in the present embodiment, the angle of inclination of monomer rotary kiln is 7 °, its angle of inclination improves more than 15% than traditional rotary kiln, and thus, the roasting time of material can shorten at least 10%, not only energy consumption significantly reduces, and the treatment capacity of rotary kiln improves more than 10%.
Embodiment 2:
In the present embodiment, three grades of rotary kilns are utilized to carry out roasting, these three grades of rotary structure schematic diagram as indicated with 1, three rotary kiln ends and kiln tail are joined end to end by tightness system, and arrange from high to low successively, three monomer rotary kiln angles of inclination are 9 °, and rotating Vortex, wherein preheating rotary kiln is only provided with burner at kiln hood, preheating rotary kiln is connected with two-stage rotary kiln, secondary calcination rotary kiln is connected with one-level calcination rotary kiln, secondary calcination rotary kiln is identical with the structure of one-level calcination rotary kiln, two-stage rotary kiln and one-level rotary kiln are respectively equipped with the regenerative high temperature combustion technology room be made up of heat storage and burner at two ends.Concrete steps are as follows:
(1) allocate the red soil nickel ore of moisture 15% into reduction coal dust, the TFe grade of this red soil nickel ore is 20%, Ni grade is 1.50%.
(2) the above-mentioned material of step (1) is fed by the sealing kiln tail of feeding device from preheating rotary kiln, material moves to the direction of sealing kiln hood with the rotation of rotary kiln, by the burner on preheating rotary kiln, preheating is carried out to material, the tightness system be meanwhile made up of sealing kiln tail and sealing kiln hood then keeps static, obtains the material after preheating.
(3) material after preheating through the sealing-duct discharging of the kiln hood of preheating rotary kiln in two-stage rotary kiln, and the direction motion continued in two-stage rotary kiln to sealing kiln hood, and the sealing-duct of two-stage rotary kiln kiln hood also keeps static, the calcined temperature controlling two-stage rotary kiln is 1150 ~ 1200 DEG C, and pass through exchange accumulation of heat and the roasting of regenerative high temperature combustion technology room, two ends, continuous pre-burning is carried out to material, make red soil nickel ore be become tiny metal nickel-iron particle by coal reduction gradually, thus obtain Preburning material.
(4) Preburning material through the sealing-duct discharging of two-stage rotary kiln kiln hood in one-level rotary kiln, and the direction motion continued in one-level rotary kiln to sealing kiln hood, the maturing temperature controlling one-level rotary kiln is 1200 ~ 1250 DEG C, and pass through exchange accumulation of heat and the roasting of regenerative high temperature combustion technology room, two ends, continuous roasting is carried out to Preburning material, iron and nickel in Preburning material are reduced further, and fine metal ferronickel particle is grown up gradually, obtain roasting material.
(5) roasting material is discharged with the kiln hood being rotated in one-level rotary kiln of rotary kiln, namely obtains roasting product.
The roasting product obtained by aforesaid method, after molten divisional processing, can obtain the Rhometal of TFe grade more than 80%, nickel grade more than 10%.In addition, the angle of inclination of monomer rotary kiln of the present invention is 9 °, and its angle of inclination improves more than 40% than traditional rotary kiln, and therefore the roasting time of material can shorten at least 20%, while reducing energy consumption, can improve the treatment capacity at least 20% of rotary kiln.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. a sectional type rotary kiln group, comprise the multiple calcination rotary kilns for carrying out baking inphases to material of connecting successively, it is characterized in that, described calcination rotary kiln comprises:
First housing, described first housing limits the first spatial accommodation;
First pivotable cartridge, described first pivotable cartridge is positioned at described first spatial accommodation, and limits heating material space;
Multiple heat storage, described multiple heat storage comprises material inlet end heat storage and material outlet end heat storage, along the direction of described Flow of Goods and Materials, lays respectively at the two ends of described first housing; And
Multiple first burner, described multiple first burner is embedded in described heating material space from described material inlet end heat storage and described material outlet end heat storage respectively.
2. sectional type rotary kiln group according to claim 1, is characterized in that, comprise further:
Preheating rotary kiln, for carrying out thermal pretreatment to described material before carrying out described sectional type roasting,
Wherein, described preheating rotary kiln comprises:
Second housing, described second housing limits the second spatial accommodation;
Second pivotable cartridge, described second pivotable cartridge is positioned at described second spatial accommodation, and limits material preheating space; And
Second burner, described second burner is embedded in described material preheating space from described second housing.
3. sectional type rotary kiln group according to claim 2, is characterized in that, described preheating rotary kiln and described multiple calcination rotary kiln be stepped arrangement from high to low successively along Flow of Goods and Materials direction.
4. sectional type rotary kiln group according to claim 2, described first pivotable cartridge and described second pivotable cartridge are rotating Vortex.
5. sectional type rotary kiln group according to claim 2, the axis of described calcination rotary kiln and the axis of described preheating rotary kiln are respectively horizontal by the angle that 7 degree of-9 degree flows downward for material.
6. sectional type rotary kiln group according to claim 2, is connected in series described in described multiple calcination rotary kiln be connected in series is undertaken by sealing-duct.
7. sectional type rotary kiln group according to claim 6, in adjacent two described calcination rotary kilns, the described material inlet end heat storage vertical non-alignment of the described material outlet end heat storage being positioned at the described calcination rotary kiln of upstream and the described calcination rotary kiln that is positioned at downstream.
8. sectional type rotary kiln group according to claim 7, the described sealing-duct being communicated with two adjacent described calcination rotary kilns in adjacent two described calcination rotary kilns between the described material outlet end heat storage of the described calcination rotary kiln of upstream and the described material inlet end heat storage of the described calcination rotary kiln in downstream.
9. sectional type rotary kiln group according to claim 1, described multiple first burners on each described calcination rotary kiln hocket heating.
10. sectional type rotary kiln group according to claim 2, described first burner and described second burner are heat-storage type burner.
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| CN107267776A (en) * | 2017-07-07 | 2017-10-20 | 沈阳有色金属研究院 | A kind of method that lateritic nickel ore direct-reduction beneficiation enrichment produces ferronickel |
| CN109686971A (en) * | 2018-12-12 | 2019-04-26 | 无锡晶石新型能源股份有限公司 | A kind of production method and production rotary kiln of nickelic polynary positive pole material |
| CN110645802A (en) * | 2019-10-29 | 2020-01-03 | 江苏巨益机电有限公司 | Electrical heating continuous type anode mud high temperature roasting device |
| CN112460944A (en) * | 2020-11-25 | 2021-03-09 | 商都中建金马冶金化工有限公司 | Horizontal rotary kiln |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109686971A (en) * | 2018-12-12 | 2019-04-26 | 无锡晶石新型能源股份有限公司 | A kind of production method and production rotary kiln of nickelic polynary positive pole material |
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| CN110645802B (en) * | 2019-10-29 | 2024-05-03 | 江苏巨益机电有限公司 | Electric heating continuous anode mud high-temperature roasting device |
| CN112460944A (en) * | 2020-11-25 | 2021-03-09 | 商都中建金马冶金化工有限公司 | Horizontal rotary kiln |
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| CN105039687B (en) | 2017-12-08 |
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