CN103708459A - Method for preparing calcium carbide - Google Patents
Method for preparing calcium carbide Download PDFInfo
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- CN103708459A CN103708459A CN201310728829.9A CN201310728829A CN103708459A CN 103708459 A CN103708459 A CN 103708459A CN 201310728829 A CN201310728829 A CN 201310728829A CN 103708459 A CN103708459 A CN 103708459A
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- 239000005997 Calcium carbide Substances 0.000 title claims abstract description 89
- 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 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 54
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 98
- 239000002245 particle Substances 0.000 claims abstract description 91
- 239000002994 raw material Substances 0.000 claims abstract description 66
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 51
- 239000000292 calcium oxide Substances 0.000 claims abstract description 51
- 239000012265 solid product Substances 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000000571 coke Substances 0.000 claims abstract description 14
- 239000006229 carbon black Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000000197 pyrolysis Methods 0.000 claims description 74
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 61
- 229910052799 carbon Inorganic materials 0.000 claims description 61
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 55
- 229910052791 calcium Inorganic materials 0.000 claims description 55
- 239000011575 calcium Substances 0.000 claims description 55
- 239000003077 lignite Substances 0.000 claims description 22
- 238000005272 metallurgy Methods 0.000 claims description 22
- 238000010891 electric arc Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 18
- 238000013467 fragmentation Methods 0.000 claims description 17
- 238000006062 fragmentation reaction Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 16
- 239000000047 product Substances 0.000 claims description 13
- 238000011284 combination treatment Methods 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 9
- -1 tire Substances 0.000 claims description 6
- 238000011282 treatment Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000002028 Biomass Substances 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000010791 domestic waste Substances 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 241001062472 Stokellia anisodon Species 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 26
- 238000004519 manufacturing process Methods 0.000 abstract description 21
- 238000003723 Smelting Methods 0.000 abstract description 12
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 8
- 239000013070 direct material Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a method for preparing calcium carbide, which comprises the following steps: drying a carbon-base raw material to obtain a dried carbon-base raw material; respectively crushing the dried carbon-base raw material and a calcium-base raw material to obtain carbon-base particles and calcium-base particles; mixing the carbon-base particles and calcium-base particles to obtain a mixture; pyrolyzing the mixture to obtain high-quality tar, high heating value gas and a pyrolytic solid product, wherein the pyrolytic solid product contains quicklime and one of coke, semicoke and carbon black; and feeding the pyrolytic solid product into an arc furnace at the temperature of not lower than 450 DEG C to perform smelting in the arc furnace, thereby obtaining the calcium carbide. Thus, the method can further enhance the heat utilization ratio and production efficiency, lower the production cost and reduce the energy consumption and pollution.
Description
Technical field
The present invention relates to chemical field, particularly, the present invention relates to prepare the method for calcium carbide.
Background technology
Calcium carbide is carbide of calcium (CaC
2), the middle of last century is described as the mother of organic synthesis before.At present mainly for the production of the series product such as chlorovinyl, vinyl acetate between to for plastic base and acrylic, the more than 70% PVC(polyvinyl chloride of China) produce and to come from carbide acetylene.Calcium carbide has a very important role to the Economic development of China, and output in the recent decade constantly increases, and 2012 annual production reach 1,869 ten thousand tons.
Although the calcium carbide industrial expansion history of existing more than 100 year, its production technology is still relatively backward.Still adopt at present the method for fixed bed (moving-bed)-block raw material-electric-arc heating, this technological reaction temperature high (2000～2200 degrees Celsius), long reaction time (1～2 hour), the energy consumption of calcium carbide per ton (purity 80%) is up to 3250kwh, and thermo-efficiency is only 50%.
Obviously, the strategy of sustainable development an urgent demand of China solves the high energy consumption problem that calcium carbide is produced as early as possible.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or at least provides a kind of useful business to select.For this reason, one object of the present invention is to propose a kind of method of preparing calcium carbide, utilizes the method can improve heat utilization ratio and production efficiency, reduces production costs, reduces energy consumption and pollution.
For this reason, according to an aspect of the present invention, the present invention proposes a kind of method of preparing calcium carbide, comprising: carbon back particle and calcium base particle are provided, 5～30 millimeters of the median sizes of described carbon back particle and calcium base particle, water content is lower than 5%; Described carbon back particle and calcium base particle are carried out to combination treatment, to obtain mixture; Described mixture is carried out to pyrolysis processing, to obtain high heating value gas, high-quality tar and pyrolysis solid product, described pyrolysis solid product contains unslaked lime and is selected from a kind of in coke, semicoke and carbon black; Described pyrolysis solid product is delivered in electric arc furnace when temperature is not less than 450 degrees Celsius, to carry out metallurgy in described electric arc furnace, and obtains described calcium carbide.
The method of preparing calcium carbide of the embodiment of the present invention is carried out copyrolysis by raw coal and unslaked lime and is obtained preparing direct material coke, semicoke or the carbon black of calcium carbide and the mixture of unslaked lime thus, and further utilizes this direct material heat to deliver to and in electric arc furnace, prepare calcium carbide.Therefore the method for preparing calcium carbide of the embodiment of the present invention combines the preparation of the production of carbide raw material and calcium carbide, can further improve heat utilization ratio and production efficiency thus, to further reduce production costs, reduce energy consumption and pollution.
In addition, the method for preparing calcium carbide according to the above embodiment of the present invention can also have following additional technical characterictic:
In some embodiments of the invention, described carbon back raw material is raw coal, and described carbon back particle is to obtain by carbon back raw material being carried out to fragmentation, and described carbon back raw material is at least one in raw coal, tire, domestic waste, biomass; Described calcium base particle is to obtain by calcium based raw material being carried out to fragmentation, and described calcium based raw material is at least one in unslaked lime, Wingdale and white lime.Can further reduce the production energy consumption of preparing calcium carbide thus.
In some embodiments of the invention, the mean particle size of described carbon back particle and calcium base particle is 15～30 millimeters.Can further improve thus carbon back particle and calcium base particle contact area and reduce pyrolysis energy consumption.
In some embodiments of the invention, described carbon back particle and calcium base particle are that combination treatment is carried out in 1:0.8～2.1 according to mass ratio.Can further improve calcium carbide productive rate thus.
In some embodiments of the invention, described pyrolysis processing is under 450～1000 degrees Celsius, to carry out 1 hour.Can further improve pyrolysis efficiency thus, save pyrolysis energy consumption.
In some embodiments of the invention, described pyrolysis processing is under 800 degrees Celsius, to carry out 1 hour.Can further improve pyrolysis efficiency thus, save pyrolysis energy consumption.
In some embodiments of the invention, described metallurgy is under 1400～2000 degrees Celsius, to carry out 5～90 minutes.Can further improve efficiency, energy efficient thus.
In some embodiments of the invention, described metallurgy is under 1600～1800 degrees Celsius, to carry out 10～20 minutes.Can further improve efficiency, energy efficient thus.
In some embodiments of the invention, the above-mentioned method of preparing calcium carbide, specifically can comprise the following steps:
(1) dry: to adopt the saturation steam that drying source is 0.8MPa, in indirect tubular roller drying device, brown coal are carried out to drying treatment, the dried brown coal of process that acquisition water content is 0.6%;
(2) fragmentation: the unslaked lime that is 93% by dried brown coal described in step (1) and calcium oxide content carries out break process with crusher, obtains respectively brown coal particle and quicklime particles that mean particle size is 15～30 millimeters;
(3) mix: by brown coal particle described in step (2) and quicklime particles, according to mass ratio, be that 1:1.04 carries out combination treatment 30 minutes in powerful mixer, to obtain mixture;
(4) pyrolysis: by mixture described in step (3) send into without in heat carrier pyrolysis heat accumulating type rotating bed 800 degrees Celsius of lower pyrolysis processing 1 hour, to obtain pyrolysis solid product, high-quality tar, high heating value gas and pyrolysis water;
Wherein, comprise 62.74% unslaked lime and 37.26% semicoke in described pyrolysis solid product, in described unslaked lime, the content of CaO is 93%, and in described semicoke, the content of fixed carbon is 82.86%.
(5) smelt: the heat when temperature is 750 degrees Celsius of pyrolysis solid product described in step (4) is delivered in electric arc furnace, 1680 degrees Celsius of lower metallurgy, after 12 minutes, lower the temperature, to obtain the calcium carbide of molten state, and discharge by furnace bottom, the calcium carbide of the molten state of discharge is cooling, fragmentation obtains calcium carbide product.
Utilize thus aforesaid method can further improve the productive rate of preparing calcium carbide, reduce production energy consumption, cost and pollution.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is the schematic flow sheet of preparing the method for calcium carbide according to an embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
According to an aspect of the present invention, the present invention proposes a kind of method of preparing calcium carbide, comprising: carbon back particle and calcium base particle are provided, 5～30 millimeters of the median sizes of carbon back particle and calcium base particle, water content is lower than 5%; Carbon back particle and calcium base particle are carried out to combination treatment, to obtain mixture; Mixture is carried out to pyrolysis processing, to obtain high heating value gas, high-quality tar and pyrolysis solid product, pyrolysis solid product contains unslaked lime and is selected from a kind of in coke, semicoke and carbon black; Pyrolysis solid product is delivered in electric arc furnace when temperature is not less than 450 degrees Celsius, to carry out metallurgy in electric arc furnace, and obtains described calcium carbide.
The method of preparing calcium carbide of the embodiment of the present invention is carried out copyrolysis by raw coal and unslaked lime and is obtained preparing direct material coke, semicoke or the carbon black of calcium carbide and the mixture of unslaked lime thus, and further utilizes this direct material heat to deliver to and in electric arc furnace, prepare calcium carbide.Therefore the method for preparing calcium carbide of the embodiment of the present invention combines the preparation of the production of carbide raw material and calcium carbide, can further improve heat utilization ratio and production efficiency thus, to further reduce production costs, reduce energy consumption and pollution.
Below with reference to accompanying drawing 1, describe in detail according to the method for preparing calcium carbide of the specific embodiment of the invention.
S100: carbon back particle and calcium base particle are provided
According to a particular embodiment of the invention, first carbon back particle and calcium base particle are provided, and according to a particular embodiment of the invention, the characteristic of carbon back particle and calcium base particle is also not particularly limited, for example the median size of the two can be 5～30 millimeters, and water content is all lower than 5%.
Above-mentionedly prepare the carbon back grain type that calcium carbide adopts and be not particularly limited, for example can pass through carbon back raw material, for example in raw coal, tire, domestic waste, biomass, at least one carries out fragmentation acquisition, the type of the same calcium base particle adopting also and be not particularly limited, for example can pass through calcium based raw material, for example at least one in unslaked lime, Wingdale and white lime carried out fragmentation acquisition.
According to a particular embodiment of the invention, the globule size of the carbon back particle obtaining after fragmentation and calcium base particle is also not particularly limited, and according to a particular embodiment of the invention, the mean particle size of carbon back particle and calcium base particle is 5～30 millimeters.According to a particular embodiment of the invention, can be preferably 15～30 millimeters.Contriver finds that particle diameter is more little and more contributes to the contact that increases by two kinds of raw materials to count, and improves the reactive behavior of raw material, thereby greatly reduces calcium carbide smelting temperature.According to a particular embodiment of the invention, by choosing carbon back particle and the calcium base particle of 15～30 millimeters, the temperature of metallurgy can be down to 1400 degrees Celsius.More traditional electric arc furnace smelting temperature of preparing calcium carbide is 2000～2300 degrees Celsius and has significantly reduced energy consumption.
In this step, the break process that carbon back raw material and calcium based raw material are carried out is can minute multistep broken gradually.Thus, carbon back raw material and calcium based raw material are made to fine granularity, can significantly increase the specific surface area of raw material, increase the point of contact of two kinds of raw materials, thereby can reduce the temperature that subsequent smelting is processed, and then reduce calcium carbide production energy consumption, improve calcium carbide output.
S200: combination treatment
Further, carbon back particle and calcium base particle after pulverizing are carried out to combination treatment, thereby can obtain mixture.According to concrete example of the present invention, the mixing match of carbon back particle and calcium base particle is also not particularly limited.The present inventor finds, the unslaked lime that pyrolysis processing generates can with carbon back particle in sulphur and silicon and reactive aluminum, therefore by the consumption of suitable raising calcium base particle, can significantly improve the quality of calcium carbide raw materials for metallurgy.Thus, by great many of experiments, grope, it is that combination treatment is carried out in 1:0.8～2.1 by carbon back particle and calcium base particle according to mass ratio that contriver finds.Can significantly improve thus productive rate and the quality of the calcium carbide preparing after metallurgy, and then effectively avoided the proportioning of unslaked lime in the carbide raw material that in process, the consumption of unslaked lime causes preparing and one of coke, semicoke and carbon black improper, follow-up productive rate and the output of preparing calcium carbide of remarkably influenced, also can avoid that proportioning is improper causes reaction not exclusively, the waste of part material simultaneously.
By carbon back particle and calcium base particle, according to mass ratio, be that combination treatment is carried out in 1:0.8～2.1 thus.Can further improve the abundant reaction of calcium base particle and carbon back particle, avoid the waste of raw material, to further improve calcium carbide productive rate.
S400: pyrolysis processing
According to a particular embodiment of the invention, mixture obtained above is carried out to pyrolysis processing, to obtain high-quality tar, high heating value gas and pyrolysis solid product, wherein, pyrolysis solid product contains a kind of in unslaked lime and coke, semicoke, carbon black.What pyrolytic process made that carbon back raw material contacts with calcium based raw material thus is tightr, is more conducive to reduce temperature and the tap to tap time of subsequent smelting, and then significantly reduces production energy consumption.
According to a particular embodiment of the invention, the actual conditions of pyrolysis processing is also not particularly limited, and according to concrete example of the present invention, can under 450～1000 degrees Celsius, carry out 1 hour.Can further improve pyrolysis efficiency thus, so as by carbon back particle and calcium base particle fully pyrolysis obtain can be used for preparing the pyrolysis solid product of a kind of and unslaked lime in the coke, semicoke, carbon black of calcium carbide, and then improve productive rate and the quality of calcium carbide.
According to concrete example of the present invention, pyrolysis processing can also preferably be carried out 1 hour under 800 degrees Celsius.Thus can be under the prerequisite of abundant pyrolyzed mixture material energy efficient as much as possible, to further improve pyrolysis efficiency and reduce production costs and energy consumption.
S500: metallurgy
The pyrolysis solid product obtaining after above-mentioned pyrolysis processing is inputed in electric arc furnace when temperature is not less than 450 degrees Celsius, to carry out metallurgy in electric arc furnace, and obtain calcium carbide.Utilized thus the sensible heat of pyrolysis solid product can effectively reduce the energy consumption of electric arc furnace, the method of preparing calcium carbide of the embodiment of the present invention adopts carbon back particle and the calcium base particle of 5～30 millimeters simultaneously, and then the using pyrolysis product obtaining can direct heat be delivered to electric arc furnace without forming processes and smelts, reduce thus forming processes, further reduced production energy consumption.
According to embodiments of the invention, the condition of metallurgy is also not particularly limited, and according to a particular embodiment of the invention, metallurgy can be carried out 5～90 minutes under 1400～2000 degrees Celsius.The method is smelted with respect to tradition 2000～2300 degrees Celsius of necessary temperature preparing calcium carbide and has significantly been reduced energy consumption.And aforesaid method first will carbon back raw material and calcium based raw material carry out pyrolysis after mixing, it is tightr that pyrolytic process makes that carbon back raw material contact with calcium based raw material, the temperature and the tap to tap time that are more conducive to thus reduce smelting.And then significantly reduced energy consumption when guaranteeing calcium carbide quality product and productive rate, saved cost.The present invention prepares the method for calcium carbide can carry out calcium carbide smelting with least energy consumption, by adopting granularity at 5～30 millimeters, more preferably 15～30 millimeters, can significantly reduce the temperature of metallurgy, and its present invention has applied containing unslaked lime and being selected from a kind of carbide raw material sensible heat in coke, semicoke and carbon black of obtaining after pyrolysis processing dexterously, carbide raw material is directly smelted, thereby further reduced temperature and the tap to tap time of smelting, can significantly reduce the energy consumption of preparing calcium carbide thus.
According to a particular embodiment of the invention, preferred, metallurgy can be carried out 10～20 minutes under 1600～1800 degrees Celsius.In this step, coke, semicoke or carbon black react calcium carbide and the carbon monoxide that generates molten state with calcium oxide, and wherein, the calcium carbide of molten state is discharged with liquid form at the bottom of by arc furnace, and cooling rear fragmentation obtains calcium carbide product; And the reducing gas that the carbon monoxide producing can be used as in metallurgy industry is used.
First the present invention is that raw coal and calcium based raw material are that unslaked lime carries out pyrolysis by carbon back raw material, the raw material that calcium carbide can be directly prepared in acquisition is solid mixture after the pyrolysis of coke, semicoke or carbon black and unslaked lime, and further this mixture direct heat is delivered to electric arc furnace smelting and prepare calcium carbide.Sensible heat after the coke making full use of thus, semicoke or carbon black and unslaked lime pyrolysis, for follow-up metallurgy has been saved a large amount of thermals source, and then utilize the method prepare calcium carbide not only raw material is risen for raw coal, tire,, domestic waste, biomass, also significantly reduced cost and the energy consumption of metallurgy simultaneously.
S500: drying treatment
According to a particular embodiment of the invention, in the method for preparing calcium carbide of above-described embodiment, carbon back particle and calcium base particle can obtain after carbon back raw material and calcium based raw material are pulverized.According to a particular embodiment of the invention, carbon back raw material and calcium based raw material are carried out respectively further comprising before pulverization process: in advance described carbon back raw material and calcium based raw material are dried, make the water content of described carbon back raw material and calcium based raw material lower than 5%.Because the Precipitation Temperature of water in raw material is lower, can be lower than 200 ℃, so drying temperature is lower, energy consumption is lower; And pyrolysis temperature is higher, higher than 450 ℃, if the water in raw material is removed in pyrolytic process, steam temperature reaches more than 400 ℃, and energy consumption is very high; And if have the existence of water in calcium carbide smelting process, water can be rapidly reacts with the harsh calcium carbide becoming, reduce calcium carbide product quality, therefore carbon back raw material and calcium based raw material are dried, make to pulverize the water content of the carbon back particle obtain and calcium base particle lower than 5%, can further save energy consumption thus, improve the quality of product calcium carbide.
According to embodiments of the invention, before carbon back raw material is pulverized, by carbon back raw material drying to water content lower than 5%.According to a particular embodiment of the invention, above-mentioned to the withering mode of carbon back raw material and be not particularly limited, can adopt the rare gas element convection drying modes such as flue gas, nitrogen, water vapour or water vapour, flue gas contact drying mode.For example also can adopt saturation steam to be dried.According to concrete example of the present invention, the temperature of saturation steam is also not particularly limited, and according to concrete example of the present invention, for the pressure of the saturation steam of drying treatment, is 0.8MPa, can further improve thus the drying efficiency of carbon back raw material and calcium based raw material.According to a particular embodiment of the invention, the water content of the carbon back raw material after drying treatment and calcium based raw material is lower than 5%.
The method of preparing calcium carbide of the embodiment of the present invention is carried out copyrolysis by raw coal and unslaked lime and is obtained preparing the direct material coke of calcium carbide and the mixture of unslaked lime thus, and further utilizes this direct material heat to send and prepare calcium carbide.Therefore the method for preparing calcium carbide of the embodiment of the present invention combines the preparation of the production of carbide raw material and calcium carbide and carries out continuously, the energy consumption of utilizing the sensible heat reduction electric arc furnace of the raw material after pyrolysis, can further improve heat utilization ratio and production efficiency thus.
According to a particular embodiment of the invention, the above-mentioned method of preparing calcium carbide can also specifically comprise the following steps:
(1) dry: to adopt the saturation steam that drying source is 0.8MPa, in indirect tubular roller drying device, brown coal are carried out to drying treatment, the dried brown coal of process that acquisition water content is 0.6%;
(2) fragmentation: the unslaked lime that in step (1), dried brown coal and calcium oxide content are 93% is carried out to break process with crusher, obtain respectively brown coal particle and quicklime particles that mean particle size is 15～30 millimeters;
(3) mix: by brown coal particle in step (2) and quicklime particles, according to mass ratio, be that 1:1.04 carries out combination treatment 30 minutes in powerful mixer, to obtain mixture;
(4) pyrolysis: by mixture in step (3) send into without in heat carrier pyrolysis heat accumulating type rotating bed 800 degrees Celsius of lower pyrolysis processing 1 hour, to obtain pyrolysis solid product, high-quality tar, high heating value gas and pyrolysis water;
Wherein, comprise 62.74% unslaked lime and 37.26% semicoke in pyrolysis solid product, in unslaked lime, the content of CaO is 93%, and in semicoke, the content of fixed carbon is 82.86%.
(5) smelt: pyrolysis solid product heat when temperature is 750 degrees Celsius in step (4) is delivered in electric arc furnace, 1680 degrees Celsius of lower metallurgy, after 12 minutes, lower the temperature, to obtain the calcium carbide of molten state, and discharge by furnace bottom, the calcium carbide of the molten state of discharge is cooling, fragmentation obtains calcium carbide product.
By utilizing the sensible heat of solid materials after pyrolysis, reduce electric arc furnace power consumption thus; In pyrolytic process, carbon back raw material is contacted with calcium based raw material tightr simultaneously, contribute to reduce calcium carbide smelting temperature, reduce power consumption, improve capacity usage ratio.
According to a particular embodiment of the invention, as without special identifier, content % all represents mass content herein.
Below with reference to specific embodiment, present invention is described, it should be noted that, these embodiment are only descriptive, and do not limit the present invention in any way.
Embodiment
Raw material:
Take unslaked lime as calcium based raw material, and wherein CaO content is 93%.
Take brown coal as carbon back raw material, and the main character of these brown coal is in Table 1.
Table 1 brown coal main character
Preparation method:
First, adopt indirect tubular roller drying device to be dried brown coal, the saturation steam that drying source is 0.8MPa, dry rear brown coal moisture is 0.5%.Unslaked lime and dried brown coal are carried out to fragmentation with crusher respectively, and the mean particle size after fragmentation is 15～30mm.Further brown coal particle and quicklime particles are mixed to 0.5h according to the quality proportioning of 1:1.04 in powerful mixer, to mix fully.
Mixed material is sent into without in heat carrier pyrolysis heat accumulating type rotating bed, is 100mm according to fabric thickness, and pyrolysis temperature is 800 ℃, and pyrolysis time is within 1 hour, to carry out pyrolysis processing.Pyrolysis product and productive rate are as shown in table 2.
Table 2 pyrolysis product productive rate
In the solid product obtaining after pyrolysis, contain 62.74% unslaked lime, 37.26% semicoke, wherein in unslaked lime, CaO content is 93t%, in semicoke, fixed carbon content is 82.86%.
The temperature of pyrolysis solid product is 750 ℃, and directly the solid product heat after pyrolysis is delivered in electric arc furnace, is heated to 1680 ℃, after smelting 12min, lowers the temperature.The product battery obtaining is that molten state is discharged from furnace bottom, cooling rear fragmentation.In product calcium carbide, containing carbide of calcium 78.57%, gas forming amount is 275L/kg.
Utilize above-mentioned technique to prepare calcium carbide and can save energy 13.08%, energy interest rate is with improving 15%.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention in the situation that not departing from principle of the present invention and aim, modification, replacement and modification.
Claims (9)
1. a method of preparing calcium carbide, is characterized in that, comprising:
Carbon back particle and calcium base particle are provided, 5～30 millimeters of the median sizes of described carbon back particle and calcium base particle, water content is lower than 5%;
Described carbon back particle and calcium base particle are carried out to combination treatment, to obtain mixture;
Described mixture is carried out to pyrolysis processing, to obtain high heating value gas, high-quality tar and pyrolysis solid product, described pyrolysis solid product contains unslaked lime and is selected from a kind of in coke, semicoke and carbon black;
Described pyrolysis solid product is delivered in electric arc furnace when temperature is not less than 450 degrees Celsius, to carry out metallurgy in described electric arc furnace, and obtains described calcium carbide.
2. the method for preparing calcium carbide according to claim 1, is characterized in that, described carbon back particle is to obtain by carbon back raw material being carried out to fragmentation, and described carbon back raw material is at least one in raw coal, tire, domestic waste, biomass; Described calcium base particle is to obtain by calcium based raw material being carried out to fragmentation, and described calcium based raw material is at least one in unslaked lime, Wingdale and white lime.
3. the method for preparing calcium carbide according to claim 1, is characterized in that, the mean particle size of described carbon back particle and calcium base particle is 15～30 millimeters.
4. the method for preparing calcium carbide according to claim 1, is characterized in that, described carbon back particle and calcium base particle are that combination treatment is carried out in 1:0.8～2.1 according to mass ratio.
5. the method for preparing calcium carbide according to claim 1, is characterized in that, described pyrolysis processing is under 450～1000 degrees Celsius, to carry out 1 hour.
6. the method for preparing calcium carbide according to claim 5, is characterized in that, described pyrolysis processing is under 800 degrees Celsius, to carry out 1 hour.
7. the method for preparing calcium carbide according to claim 1, is characterized in that, described metallurgy is under 1400～2000 degrees Celsius, to carry out 5～90 minutes.
8. the method for preparing calcium carbide according to claim 7, is characterized in that, described metallurgy is under 1600～1800 degrees Celsius, to carry out 10～20 minutes.
9. according to the method for preparing calcium carbide described in any one in claim 1-8, it is characterized in that, comprise the following steps:
(1) dry: to adopt the saturation steam that drying source is 0.8MPa, in indirect tubular roller drying device, brown coal are carried out to drying treatment, the dried brown coal of process that acquisition water content is 0.6%;
(2) fragmentation: the unslaked lime that is 93% by dried brown coal described in step (1) and calcium oxide content carries out break process with crusher, obtains respectively brown coal particle and quicklime particles that mean particle size is 15～30 millimeters;
(3) mix: by brown coal particle described in step (2) and quicklime particles, according to mass ratio, be that 1:1.04 carries out combination treatment 30 minutes in powerful mixer, to obtain mixture;
(4) pyrolysis: by mixture described in step (3) send into without in heat carrier pyrolysis heat accumulating type rotating bed 800 degrees Celsius of lower pyrolysis processing 1 hour, to obtain pyrolysis solid product, high-quality tar, high heating value gas and pyrolysis water;
Wherein, comprise 62.74% unslaked lime and 37.26% semicoke in described pyrolysis solid product, in described unslaked lime, the content of CaO is 93%, and in described semicoke, the content of fixed carbon is 82.86%.
(5) smelt: the heat when temperature is 750 degrees Celsius of pyrolysis solid product described in step (4) is delivered in electric arc furnace, 1680 degrees Celsius of lower metallurgy, after 12 minutes, lower the temperature, to obtain the calcium carbide of molten state, and discharge by furnace bottom, the calcium carbide of the molten state of discharge is cooling, fragmentation obtains calcium carbide product.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668568A (en) * | 2016-01-04 | 2016-06-15 | 神雾环保技术股份有限公司 | System and method for production of calcium carbide |
| CN107364866A (en) * | 2017-06-28 | 2017-11-21 | 大连华锐重工集团股份有限公司 | A kind of low-order coal prepares the method and compound binding agent of calcium carbide furnace charge |
| CN113735126A (en) * | 2021-09-28 | 2021-12-03 | 北京化工大学 | Method for preparing calcium carbide at low temperature by utilizing electromagnetic induction technology |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064818B (en) * | 2016-05-26 | 2018-03-23 | 神雾科技集团股份有限公司 | The production technology of carbide raw material production system and carbide raw material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046140A (en) * | 1990-04-30 | 1990-10-17 | 伊敏河矿区发电厂 | Produce the technology of calcium carbide with brown coal |
| CN101883746A (en) * | 2007-11-14 | 2010-11-10 | 澳泽化学特罗斯特贝格有限公司 | Method for the production of calcium carbide on an industrial scale in an electric low-shaft furnace |
-
2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046140A (en) * | 1990-04-30 | 1990-10-17 | 伊敏河矿区发电厂 | Produce the technology of calcium carbide with brown coal |
| CN101883746A (en) * | 2007-11-14 | 2010-11-10 | 澳泽化学特罗斯特贝格有限公司 | Method for the production of calcium carbide on an industrial scale in an electric low-shaft furnace |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668568A (en) * | 2016-01-04 | 2016-06-15 | 神雾环保技术股份有限公司 | System and method for production of calcium carbide |
| CN105668568B (en) * | 2016-01-04 | 2018-05-08 | 神雾环保技术股份有限公司 | Produce the system and method for calcium carbide |
| CN107364866A (en) * | 2017-06-28 | 2017-11-21 | 大连华锐重工集团股份有限公司 | A kind of low-order coal prepares the method and compound binding agent of calcium carbide furnace charge |
| CN113735126A (en) * | 2021-09-28 | 2021-12-03 | 北京化工大学 | Method for preparing calcium carbide at low temperature by utilizing electromagnetic induction technology |
| CN113735126B (en) * | 2021-09-28 | 2022-07-12 | 北京化工大学 | Method for preparing calcium carbide at low temperature by utilizing electromagnetic induction technology |
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