CN1366818A - Method for producing insect-resist agent by baking diatomite in low-temperature rotary kiln - Google Patents
Method for producing insect-resist agent by baking diatomite in low-temperature rotary kiln Download PDFInfo
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- CN1366818A CN1366818A CN01103298A CN01103298A CN1366818A CN 1366818 A CN1366818 A CN 1366818A CN 01103298 A CN01103298 A CN 01103298A CN 01103298 A CN01103298 A CN 01103298A CN 1366818 A CN1366818 A CN 1366818A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title abstract description 6
- 239000011449 brick Substances 0.000 claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 21
- 238000012546 transfer Methods 0.000 abstract description 7
- 238000007667 floating Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 16
- 239000002245 particle Substances 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 9
- 239000011148 porous material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000010298 pulverizing process Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 241000238631 Hexapoda Species 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000010534 mechanism of action Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 241000254171 Curculionidae Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000021050 feed intake Nutrition 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin Chemical compound CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Processing Of Solid Wastes (AREA)
Abstract
A method for producing insect-proof agent by baking diatomite in low-temp rotary kiln features that the diatomite is baked in rotary kiln with refractory-brick material raising plate at 650-680 deg.C to increase heat transfer efficiency, and its material sorting and finished-product sorting units have negative feedback circulation sorting system with back-flushing air-floating dregs-discarding unit.
Description
The invention provides a kind of low temperature rotary kiln baking diatomite and produce the method for insect-proof agent.This method is made of dried, classified, rotary kiln low-temperature bake and product selecting classification three parts of original soil, belongs to a new technical field of researching and developing at present.
Because the environmental pollution that the use of chemical insecticide causes and jeopardize the health of human body problem forces people to research and develop pollution-free, avirulent desinsection and insect-proof agent.The insect-proof agent that processes with diatomite began to use in minority developed country in recent years, stored and family's insect protected as grain.Its mechanism of action roughly is to destroy oil layer and cured fat layer or the obstruction pore pipe of insect by the suction-operated of insect-proof agent, and it is deadly to cause that insect dehydrates.Therefore, according to the mechanism of action, the diatomite insect-proof agent should have bigger specific area and pore volume.For this reason, need to remove organic substance in diatomite and the diatom test hole, and make the hydrosilicate crystallite mineral dehydration in the natural original soil resolve into amorphous xerogel, increase specific surface area, and reduce the content of crystal class compound by roasting.According to the experiment [document 1] of catalyst carrier, sintering temperature should be about 650 ℃.Temperature drift can cause micropore sintered, and specific surface area reduces, and temperature is on the low side, and impurity can not be burnt or decompose.
Than roasting diatomite prior art under the lower temperature following several method is being arranged:
1. adopt the fixed bed roasting.Because the film coefficient of heat transfer between layer bed and wall is low, causes heat transfer efficiency low, and is unfavorable for the serialization industrial production.
2. employing fluiddized-bed roasting.Because too little (overwhelming majority is between 5～30 μ) of the particle of diatom test and non-sphere, layer bed gas permeability is very poor, can't adopt.
3. roasting under the air supporting feed status.Because the very low intensification of diatomaceous thermal conductivity factor is slow, and the impurity digest and decompose in the original soil needs certain constant temperature time, too high to the temperature tolerance requirement of thermal current recycle unit in addition, so also inconvenience is adopted.
4. adopt the process equipment of existing super-cell, can realize that industrialization produces continuously.But be used for insect-proof agent production and also have following shortcoming and defect.
(1) sintering temperature of filter aid is about 1000 ℃, and has flux to participate in.The diatom test melt surface bonds each other in sintering process, forms the particle that differs in size.Along with the running of rotary kiln, and the rolling that does not stop and stirring, increased with the contacting of kiln wall and air-flow, improved heat transfer efficiency.Reduce to about 650 ℃ when sintering temperature, the diatom test surface does not reach molten condition, and the diatomite dry powder of going into kiln is very loose, and (this moment, degree of accumulation was at 0.1-0.15g/cm
3), flow down (the rotary kiln cylindrical shell gradient 2～3%) by kiln tail inwall straight line at the bottom of the kiln to kiln hood as water, can not stir, so heat transfer efficiency is low, and roasting is inhomogeneous at all
(2) the kiln temperature is reduced to about 650 ℃ by 1000 ℃, as still adopting diesel oil or calorific value＞1250kcal/NM
3Above coal gas is made fuel, certainly will cause the highest flame temperature higher, and the kiln wall temperature and the constant temperature head of district are wayward.
(3) filter aid is promptly to use in solution at hygrometric state, thus exigent chemical stability, very little specific surface area (0.1-0.5M
2/ g) and very little pore volume (0.1cm
3/ g), must select SiO for this reason
2The one-level soil that content is very high is raw material, but to SiO
2Thing not do mutually the strict regulations insect-proof agent then different, be to use under the drying regime, require to have big as far as possible specific surface area (＞15M
2/ g) and pore volume (〉=0.8cm
3/ g) and the SiO of alap crystallization
2Content.Therefore can use SiO
2The secondary soil that content is lower is raw material, but must strictness sub-elects the SiO of stone fragment and crystallization
2In other words, prior art is not suitable for the production of insect-proof agent to the sorting of raw material and finished product.
(4), and flux (Na is arranged because filter aid is to burn till under 1000 ℃ of left and right sides high temperature
2CO
3Reach small amount of clay in the original soil) participate in, cause the grog granularity of burning till big, and certain mechanical strength is arranged, so the pulverizing of grog is three grades, ratio of reduction height.As be used for pulverizing the diatomite of easy fired, and certainly will cause depth crushing, fine product ratio is increased, and can make small amount of crystalline class material be ground into fine powder, be difficult to separate.
At the above-mentioned deficiency of prior art, the invention provides and a kind ofly can utilize that I and II diatomite processes that size distribution is suitable, the big and SiO of crystallization of specific surface area and pore volume
2The diatomite insect-proof agent that content is very low
The present invention takes following concrete technical measures to realize above-mentioned purpose.
1。On the basis of existing rotary kiln (document 2), look kiln internal diameter size with fire-resistant brick some shaped form lifting blades that go out five equilibrium; The brick rib of projection exceeds contiguous brick face 100～200mm; And make the rotation direction identical (seeing) of its bending direction and rotary kiln from kiln hood; Kiln hood and kiln tail are respectively reserved 1M and are not built the refractory brick lifting blade.
2. adopt low heat value (1000～1200kcal/N.M
3) air mixed gas or industrial alcohol are fuel, and corresponding improvement burner blast pipe size, increase one time the wind air inflow.
3. improve the sorting waste ability of original soil and product.
Partly establish secondary adjustable speed sorter in the raw material sorting, constitute a material negative-feedback circulation separation system, first order Critical Grading particle diameter 30-40 μ, second level Critical Grading particle diameter 60-80 μ, and connect blowback air supporting waste device in second level sorter coarse fodder outlet.
In product selecting classification part, if three grades of adjustable speed sorters, first order Critical Grading particle diameter 15-20 μ, second level Critical Grading particle diameter 20-30 μ, constitute a material negative-feedback circulation separation system by third level sorter and second level sorter, and connect blowback air supporting waste device in the coarse fodder outlet of third level sorter.
4. the reduction ratio of reduction reduces the probability that the crystal class material is ground.Product selecting classification part first order cracker is removed (document 3), replace it with centrifugal fan.Second level cracker rotating speed is reduced to 1000～1500 rev/mins by 2500 rev/mins; Third level cracker rotating speed is reduced to 2000～2500 rev/mins by 3500 rev/mins.
By above technical measures, improved sorting capability to original soil; Impurity such as sand, stone fragment is gone out by sorting before going into kiln substantially.Peak flame temperature is controlled at below 850 °, and the highest wall temperature of rotary kiln is controlled at 650-680 ℃, the constant temperature head of district, and material is heated evenly, thermal efficiency height.Under these process conditions, reduced amorphous Si O
2Be converted into the SiO of crystallization
2(α-SiO
2And β-SiO
2) possibility.Reduced the unnecessary degree of depth in the product selecting classification and ground, even the SiO of partially crystallizable is arranged
2Generate, major part also can be gone out in sorting, has also reduced the ratio of the fine powder of 1-3 μ simultaneously.For varigrained product requirement,, can obtain satisfied grading effect as long as regulate the critical particle diameter of sorter.
Accompanying drawing 1 is a process flow diagram of the present invention.
Moisture diatomite original soil is sent cracker (2) to through belt conveyor (1), and through just sending into conveying fan (3) by air-flow after the fragmentation, blower fan (3) is sent material and hot-air mixture into drying tube (4) then.Dried material is sent into first order raw material sorter (6) through blower fan (5), and the smart native fines that meets the requirements flows to into separator (12).Impure coarse fodder flows to into second level cracker (7), pulverizes the back materials flow and sends into second level sorter (9) through blower fan (8).The recycling fines stream in classified back feeds back to blower fan (3) inlet of first order sorter.Impure coarse fodder blowback air supporting waste device (10) waste of flowing through.Blower fan (11) is the smart soil under back blowing machine is separated by separator (12) is delivered to rotary kiln (20) through valve (13) and conveyer (14), conveyer (19) a charging aperture.Fine product are sent into deduster (16) with waste gas through blower fan (15) and are separated.Clean air and steam enter atmosphere through blower fan (18).The fine product diatomite that reclaims is sent into kiln tail inlet (20) again through conveyer (17), (14), (19).Rotary kiln exhaust gas is connected to blower fan (3), as the thermal source and the medium of pneumatic conveying drying.The grog good through rotary kiln (21) roasting enters blower fan (25) by kiln hood (22) hopper, sends into finished product first order sorter (26) then.Qualified fines is sent into separator (35), and coarse fodder enters second level cracker (27).Mixed material after the pulverizing is sent into second level sorter (29) through blower fan (28).Fines after the classification is delivered to separator (35); Impure coarse fodder enters third level cracker (30) and pulverizes, sends into third level sorter (32) through blower fan (31) afterwards.Return the blower fan (28) of second level classification than fines stream after the classification, sorting circulates.The coarse fodder outlet of third level sorter connects blowback air supporting waste device (33), and coarse fodder is waste after flotation.Blower fan (34) is a back blowing machine.Qualified product enters finished bin (37) by separator (35) separation after cut down (36).Fine product and air enter deduster (39) through blower fan (38).The fine product that deduster reclaims are sent into packaging bag through conveyer (40).Pure air enters atmosphere through blower fan (41).
Accompanying drawing 2,3 is respectively the front view and the end view of lifting blade brick.The same with other refractory brick, except that the no spill mud ditch of end face (1), on two end faces (2), two sides (3) mud ditch dark about 5mm (4) is arranged all, mud ditch (5) is arranged, about dark 5mm on bottom surface (6).This brick end face to the height between the bottom surface is more than two times of other refractory brick, and the raised area is lifting blade.Filling adhesive in the spill mud ditch only during actual building by laying bricks or stones makes it between brick and the brick bonding mutually, has formed the mud pin in the spill mud ditch, has fixed the invariant position of brick.
Accompanying drawing 4,5 is respectively the radial and axial generalized section of low temperature rotary kiln.Kiln body box hat (1) and the middle shell wall slit (2) that forms of insulating brick-layer (3) have vertical mud pin (5) fixing therebetween; Insulating brick in the ranks radial slot (11) has circumference mud pin (8) fixing; Going together between adjacent insulating brick laterally, seam (12) has vertical mud oar pin (13) fixing; Insulating brick and refractory brick in the ranks radial slot (10) have circumference mud pin (7) fixing; The horizontal seam (14) of going together between adjacent refractory brick is fixing by vertical mud pin (15); Constituted complete, the firm masonry lifting blade brick (16) of rotary kiln thus and begun to build by laying bricks or stones (Fig. 5) by kiln tail 1M place.Two dislocation of every block delegation builds again.The skew direction of seeing the lifting blade curve from kiln hood should turn to consistent with rotary kiln.Determine the bar number of lifting blade curve according to kiln internal diameter size; Big number of kiln internal diameter is many, and little number of kiln internal diameter is few, and it is fixed generally to select between the 6-12 bar.Branch kiln internal diameter girths such as lifting blade curve.Lifting blade is brick to be ended to kiln hood 1M place, changes common refractory brick into.The low temperature rotary kiln is with the main difference part of common rotary kiln, and promptly being has the refractory brick lifting blade in the kiln.
Further describe technical characterictic of the present invention by the following examples.
Produce 5000 tons diatomite insect-proof agent production line per year.Rotary kiln box hat internal diameter Φ 1800mm, the long 18M of kiln.Heat-insulation layer is selected LG type light weeight alumina brick for use, is of a size of 230 * 200 * 133/103mm, bottom surface mud groove depth 10mm, all the other 5 face mud groove depth 6mm.To adopt mixing mud, mud proportioning be 500# cement and the ratio of fire clay 1: 2.Every ring is with 42, and about longitudinal seam 2mm, radial slot is within 0.8mm.Stay each one of the wide dilatation joint of 15mm at distance kiln hood and kiln tail 6095mm place, when building by laying bricks or stones with the asbestos jam-pack.Fire brick layer is selected T38 type refractory brick for use, and brick shape is divided two kinds, and a kind of is plain edition 230 * 113 * 65/55mm, and another kind is the lifting blade brick then, is of a size of 113 * 230 * 65/45mm.These two kinds of bricks all have the dark mud ditch of 5mm except that end face.The employing mixing mud is built by laying bricks or stones, and proportioning is a 500# cement and the ratio of fire clay 1: 3.Begin to build by laying bricks or stones totally 66 on every ring, axial slit 2mm, radial slot 1mm from the kiln tail.Respectively stay the dilatation joint of 1 wide 25mm at distance kiln hood and kiln tail 5865mm place, when building by laying bricks or stones with the asbestos cord jam-pack.Risen by the 5th brick of kiln tail and to build the lifting blade brick, per two 113 * 230 * 65/45mm bricks dislocation delegation builds by laying bricks or stones.See that from kiln hood its yawing moment is identical with the rotary kiln direction of rotation.Contiguous each row is built with 230 * 113 * 65/55mm is brick, builds the lifting blade brick of next line again every 10 row.Like this, every ring 66 row, having 12 is 113 * 230 * 65/45mm brick, all the other 60 is 230 * 113 * 65/55mm brick.So continuity builds, and stops to build the lifting blade brick to kiln hood 1M place, all adopts common shaped brick.Rotary kiln finishes building the back drying rotating speed that can come into operation and controls with buncher.
Raw material adopts long white secondary original soil, moisture content about 30%.The butt chemical composition is: SiO
283.2%, Al
2O
36.1%, Fe
2O
33.2%, CaO 1.0%, and MgO 1.2%, ignition loss 5.2%.Its physical index is: bulk density 0.40g/cm
3Specific surface area 20M
2/ g, pore volume 0.90Cm
3/ g.This original soil enters the pneumatic conveying drying system after fragmentation just, dry back moisture content reduces to 0.5～2%, sends into first order sorter by blower fan, and the critical particle diameter of sorter is at 30～40 μ.Fines enters separator after the sorting, and coarse fodder enters second level sorter after crushed, Critical Grading particle diameter 60-80 μ.The compound that sub-elects feeds back to the sorting again of first order sorter again, and the materials flow that granularity and proportion are qualified enters separator, and the underproof cracker that enters is pulverized again, and so circulation is gone down, and all selects until available raw material.And residues such as sand, stone fragment enter blowback air supporting waste device by second level sorter coarse fodder mouth, reclaim the diatomite particle that adheres to again, and remaining pure impurity and hyperbaric earth material are discharged by the waste mouth.All qualified smart soil is separated by separator and enters conveyer.Fine product reclaim through deduster and also enter conveyer, enter rotary kiln with the essence that separator is told after native the mixing.Steam and clean waste gas enter atmosphere.
The fuel of rotary kiln adopts 1200kcal/NM
3The air mixed gas.Suitably strengthen the diameter of burner blast pipe, regulate intake and make peak flame temperature not be higher than 850 ℃, the kiln wall temperature is between 650-680 ℃; The kiln exhaust gas temperature is about 300 ℃ during constant temperature.Rotary kiln flat-temperature zone length can feed intake when meeting the requirements.Rotary kiln turns round with counter-clockwise direction.Material enters behind the rotary kiln and to be stopped and to scrape by lifting blade and take up, and upwards (kiln tail direction) stirred; One lifting blade is scraped the material inhour when bringing to 0 ° by-90 ° (circle center positions at the bottom of the kiln), and material constantly falls; Go to+90 ° the time, material falls fully; Scrape the band virgin material when going to 180 ° again.Go down so repeatedly, material is stirred price hike up and down fully.Increased the contact probability of material, improved film coefficient of heat transfer with kiln wall and thermal current.This kind state should be between the state between fixed bed and the fluid bed, so the heat transfer efficiency height, roasting is even.
Burned grog enters blower fan (25) by just broken, sends into first order sorter afterwards, and critical particle diameter is regulated between 15-20 μ.Fines stream is delivered to product separator after the classification; Coarse fodder flows to and continues broken into second level cracker (the general employing changeed tooth-like Universalpulverizer).The cracker rotating speed is adjusted in 1000～1500 rev/mins of scopes.Mixture flow after the pulverizing enters second level sorter classification, and critical particle diameter is regulated between 20-30 μ.Fines flows to into product separator after the classification; Coarse fodder flows to and continues broken into third level cracker (the general employing changeed tooth-like Universalpulverizer).The mixture flow that third level cracker rotating speed is adjusted in 2000～2500 rev/mins of scopes after pulverizing feeds back to the sorting again of second level sorter through blower fan, and so circulation is gone down, and all separates until available grog and delivers to product separator.The sedimentation sorting in the blowback air-floating apparatus of remaining thick slag, the fines of adhesion is reclaimed by the blowback flotation; Proportion very much not available grog, particularly crystal class material (α-SiO
2And β-SiO
2Deng) separated going out.The smart powder of grog that product separator meets the insect-proof agent requirement with granularity is separated and is sent into finished bin.Fine product are delivered to deduster through blower fan and are separated, and basic clean air enters atmosphere.
The product chemical composition and the physical index of the present invention's preparation are as follows:
SiO
2 85.8％
Al
2O
3 6.4％
Fe
2O
3 3.4％
CaO 1.1％
MgO 1.3％
Bulk density 0.25g/Cm
3
Specific surface area 20M
2/ g
Pore volume 0.92Cm
3/ g
α-SiO
2Trace
This product mixes with the rice of existing weevil adult by the consumption of every 1000g rice 2g.25 ± 2 ℃ of temperature, test under relative moisture 75% condition, adult was all dead in 14 days, there is no second generation larva and produced.Indoor spraying ant, ant is all dead in 5 days with this product.
Process equipment of the present invention is applicable to the processing of natural diatomaceous earth one-level soil, secondary soil, is used to prepare diatomite insect-proof agent and agricultural chemicals, slow-release fertilizer agent.Widen the purposes of secondary soil, reduced product cost.As to adopt high-quality one-level diatomite be raw material, and the present invention also can be used for the production of rubber compound and paint flatting agent.
List of references: [1] Yin Xingyi, catalysis journal, 1985 the 6th volume the 1st phase [2] application number 00106149.6[3] ZL90105186.1
Claims (3)
1. a low temperature rotary kiln is characterized in that adopting highly and has built out some shaped form lifting blades above the refractory brick of common refractory brick more than two times by laying bricks or stones at the kiln inwall; Branch kiln inwall circumference such as lifting blade curve, its skew direction has been seen identical with the rotary kiln direction of rotation by kiln hood.
2. a low temperature rotary kiln baking diatomite is produced the method for insect-proof agent, it is characterized in that adopting the rotary kiln of band refractory brick lifting blade, and under 650-680 ℃ of lower temperature roasting diatomite.
3. the described low temperature rotary kiln baking of claim 2 diatomite is produced the method for insect-proof agent, and its feature is that also raw material sorting and product selecting classification part all have the negative-feedback circulation separation system of blowback air supporting waste device; The first order that its grog is pulverized adopts centrifugal fan, and the second level, the third level are all adopted changes tooth-like Universalpulverizer; Its rotating speed, second level cracker is adjusted in 1000～1500 rev/mins of scopes, and third level cracker is adjusted in 2000～2500 rev/mins of scopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011032987A CN100415362C (en) | 2001-01-21 | 2001-01-21 | Method for producing insect-resisting agent by using low-temp. rotary kiln to roast kieselguhr |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011032987A CN100415362C (en) | 2001-01-21 | 2001-01-21 | Method for producing insect-resisting agent by using low-temp. rotary kiln to roast kieselguhr |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1366818A true CN1366818A (en) | 2002-09-04 |
| CN100415362C CN100415362C (en) | 2008-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011032987A Expired - Fee Related CN100415362C (en) | 2001-01-21 | 2001-01-21 | Method for producing insect-resisting agent by using low-temp. rotary kiln to roast kieselguhr |
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| CN (1) | CN100415362C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017508A (en) * | 2012-12-28 | 2013-04-03 | 江苏科行环境工程技术有限公司 | Uniform-wind material raising device of horizontal rotary drying machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2038790A1 (en) * | 1969-08-06 | 1971-02-11 | Prerowske Strojirny N P | Increasing the periphal breakaway angle for - materials in rotary shaft furnaces |
| FR2592464B1 (en) * | 1985-12-31 | 1989-10-06 | Usines Metallurg Exploit | IMPROVEMENTS IN INDUSTRIAL WASTE INCINERATION PLANTS INCLUDING A ROTATING OVEN |
| CN1051031C (en) * | 1990-08-01 | 2000-04-05 | 尹兴伊 | Method and special apparatus for production of powdery products |
| CN1051980A (en) * | 1990-12-18 | 1991-06-05 | 四川大学 | A kind of new tumor markers and with the method for this marker detection tumour |
| DE19629848A1 (en) * | 1995-08-01 | 1997-02-06 | Wtu Waermetech & Umweltschutz | Kiln for purifying and regenerating kieselguhr-contg. materials, - e.g. filtration slurries from breweries, includes a horizontal rotary kiln with three zones and three separate internal material conveyors |
| DE19533078A1 (en) * | 1995-09-07 | 1997-03-13 | Messer Griesheim Gmbh | Method and device for grinding and classifying regrind |
| JPH1054523A (en) * | 1996-08-09 | 1998-02-24 | Yasumasa Komori | Rotary kiln type combustion apparatus |
-
2001
- 2001-01-21 CN CNB011032987A patent/CN100415362C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017508A (en) * | 2012-12-28 | 2013-04-03 | 江苏科行环境工程技术有限公司 | Uniform-wind material raising device of horizontal rotary drying machine |
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| Publication number | Publication date |
|---|---|
| CN100415362C (en) | 2008-09-03 |
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