CN204434292U - Prepare the system of calcium carbide - Google Patents
Prepare the system of calcium carbide Download PDFInfo
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- CN204434292U CN204434292U CN201420859414.5U CN201420859414U CN204434292U CN 204434292 U CN204434292 U CN 204434292U CN 201420859414 U CN201420859414 U CN 201420859414U CN 204434292 U CN204434292 U CN 204434292U
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Abstract
The utility model proposes a kind of system preparing calcium carbide, this system comprises: drying installation, shredding unit, mixing device, press ball device, pyrolysis installation, combustion bin and smelting device, shredding unit has dry raw coal entrance and raw coal dust outlet, and dry raw coal entrance is connected with drying installation; Mixing device has the outlet of raw coal powdering inlet, lime inlet and mixture; Press ball device has mixture entrance and pelletizing material outlet, and mixture entrance exports with said mixture material and is connected; Pyrolysis installation has pelletizing material inlet and the outlet of pyrolysis solid product, and pelletizing material inlet is connected with above-mentioned pelletizing material outlet; Combustion bin exports with pyrolysis solid product and is connected; And smelting device has hot solid inlet and calcium carbide outlet, hot solid inlet is connected with combustion bin.Utilize said system significantly to reduce and smelt energy consumption and production cost, the efficiency and quality of preparing calcium carbide can be improved further simultaneously.
Description
Technical field
The utility model relates to chemical field, and specifically, the utility model relates to the system preparing calcium carbide.
Background technology
Calcium carbide and carbide of calcium (CaC
2), react with water and generate acetylene, be that raw material can generate several thousand kinds of Organic chemical products with acetylene, before the middle of last century, be described as the mother of organic synthesis.At present mainly for the production of series product such as chlorovinyl, vinyl acetate between to for plastic base and acrylics, the PVC (polyvinyl chloride) of China more than 70% produces and comes from carbide acetylene.The Economic development of calcium carbide to China has a very important role, and output in the recent decade constantly increases, and 2013 annual production reach more than 2,200 ten thousand tons.
Calcium carbide production technology backwardness relatively, mainly contains electric heating process and the hot method of oxygen two kinds of production technique at present.Electric heating process adopts the method for fixed bed (moving-bed)-block stock-electric-arc heating, because block stock contact area is little, seriously limit raw material heat transfer process, industrial reaction need at high temperature be carried out (2000 ~ 2300 DEG C), the power consumption of calcium carbide per ton (purity 80%), up to 3250kwh, is genuine " highly energy-consuming " industry.The hot method of oxygen is by adding excessive fuel (coal, heavy oil or Sweet natural gas etc.), utilize excessive fuel combustion release of heat, with the heat supply of Some substitute electric arc, reduce the electric quantity consumption in calcium carbide production process, but the hot method of oxygen adopts block stock, more than 2000 DEG C, still there is high energy consumption problem in calcium carbide production temperature.So far, the hot legal system of oxygen is for calcium carbide technique and unrealized industrialization.
Utility model content
The utility model is intended to one of solve the problems of the technologies described above at least to a certain extent.For this reason, an object of the present utility model is to propose a kind of system preparing calcium carbide, utilizes this system can improve heat utilization ratio and production efficiency, reduces production cost, reduces energy consumption and pollution.
According to an aspect of the present utility model, the utility model proposes a kind of system preparing calcium carbide, this system comprises: drying installation, and described drying installation has housing, and described housing exterior walls is provided with thermal source chuck, and described housing limits the dry chamber of raw coal;
Shredding unit, described shredding unit has dry raw coal entrance and raw coal dust outlet, and described dry raw coal entrance is connected with described drying installation;
Mixing device, described mixing device has the outlet of raw coal powdering inlet, lime inlet and mixture, and described raw coal powdering inlet is connected with described raw coal dust outlet;
Press ball device, described press ball device has mixture entrance and pelletizing material outlet, and described mixture entrance exports with described mixture and is connected;
Pyrolysis installation, described pyrolysis installation has pelletizing material inlet and the outlet of pyrolysis solid product, and described pelletizing material inlet is connected with described pelletizing material outlet;
Combustion bin, described combustion bin exports with described pyrolysis solid product and is connected; And
Smelting device, described smelting device has hot solid inlet and calcium carbide outlet, and described hot solid inlet is connected with described combustion bin.
Hot for oxygen method and closed electric furnace method combine by the system preparing calcium carbide of the utility model above-described embodiment, by mixing with lime powder with excessive raw coal powder in advance, carry out pyrolysis and burning, obtain high temperature and the pelletizing material containing semicoke and lime of close contact, thus this pelletizing material is carried out metallurgy in electric furnace, significantly can reduce smelting temperature thus, save tap to tap time, and then save energy consumption.
In addition, following additional technical characteristic can also be had according to the system preparing calcium carbide of the utility model above-described embodiment:
In the utility model, described smelting device is closed electric furnace.
In the utility model, described pyrolysis installation is rotating bed pyrolysis oven.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet preparing the system of calcium carbide according to an embodiment of the present utility model.
Fig. 2 is the schema utilizing the system preparing calcium carbide of an embodiment of the present utility model to produce calcium carbide method.
Embodiment
Be described below in detail embodiment of the present utility model, 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.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
Describe the system 100 preparing calcium carbide of the utility model embodiment below with reference to Fig. 1, comprising: drying installation 10, shredding unit 20, mixing device 30, press ball device 40, pyrolysis installation 50, combustion bin 60 and smelting device 70.
Wherein, drying installation 10 has housing, and housing exterior walls is provided with thermal source chuck 11, and housing limits the dry chamber 12 of raw coal; Shredding unit 20 has dry raw coal entrance 21 and raw coal dust outlet 22, and dry raw coal entrance 21 is connected with drying installation 10; Mixing device 30 has raw coal powdering inlet 31, lime inlet 32 and mixture outlet 33, raw coal powdering inlet 31 and raw coal dust outlet 22; Press ball device 40 has mixture entrance 41 and pelletizing material outlet 42, and mixture entrance 41 and mixture export 33 and be connected; Pyrolysis installation 50 has pelletizing material inlet 51 and pyrolysis solid product outlet 52, and pelletizing material inlet 51 is connected with pelletizing material outlet 42; Combustion bin 60 and pyrolysis solid product export 52 and are connected; And smelting device 70 has hot solid inlet 71 and calcium carbide outlet 72, hot solid inlet 71 is connected with combustion bin 60.
Hot for oxygen method and closed electric furnace method combine by the system preparing calcium carbide of the utility model above-described embodiment, by mixing with lime powder with excessive raw coal powder in advance, carry out pyrolysis and burning, obtain high temperature and close contact the pelletizing material containing semicoke and lime, thus this pelletizing material heat is delivered in electric furnace and carry out metallurgy, significantly can reduce smelting temperature thus, save tap to tap time, and then save energy consumption.
According to specific embodiment of the utility model, described smelting device is closed electric furnace.
According to specific embodiment of the utility model, described pyrolysis installation 50 is rotating bed pyrolysis oven.
Describe the method utilizing the system preparing calcium carbide of the utility model preceding embodiment to produce calcium carbide in detail below with reference to Fig. 2, the method comprises: raw coal is carried out drying treatment in drying installation 10, to obtain dry raw coal; Dry raw coal and lime are carried out pulverization process respectively in shredding unit 20, to obtain raw coal powder and lime powder; Combination treatment is carried out, to obtain mixture by excessive raw coal powder and lime powder mixing device 30; Pressure ball process is carried out, to obtain pelletizing material by mixture press ball device 40; Carry out pyrolysis processing by pelletizing material pyrolysis installation 50, to obtain artificial petroleum, artificial natural gas and pyrolysis solid product, wherein, pyrolysis solid product contains semicoke and lime; Pyrolysis solid product heat is delivered in combustion bin 60 and carries out burn processing, to obtain hot solid; And hot solid thermal delivered in closed electric furnace 70 carry out metallurgy, to obtain calcium carbide.
Utilize the system preparing calcium carbide of the utility model above-described embodiment to produce calcium carbide hot for oxygen method and closed electric furnace method are combined, by mixing with lime powder with excessive raw coal powder in advance, carry out pyrolysis and burning, obtain high temperature and close contact the pelletizing material containing semicoke and lime, thus this pelletizing material heat is delivered in electric furnace and carry out metallurgy, significantly can reduce smelting temperature thus, save tap to tap time, and then save energy consumption.
S100: drying treatment
According to specific embodiment of the utility model, first raw coal carries out drying, to obtain through super-dry raw coal.According to specific embodiment of the utility model, the type of raw coal is also not particularly limited, such as, can be cheap low-rank coal, can reduce costs thus.And adopt low-rank coal can also expand as the raw material preparing calcium carbide and existingly prepare the range of choice of calcium carbide system to raw coal, avoid only with coke or semicoke for the restriction of calcium carbide prepared by raw material.According to specific embodiment of the utility model, lime can be obtained through calcination process by Wingdale.
Raw coal after drying process, its water content is lower than 3wt%, and avoid because raw coal China and foreign countries water is higher, water and lime reaction generate calcium hydroxide, and calcium hydroxide through heating, decomposes and produces calcium oxide, cause the efflorescence of type ball in pyrolytic process.Therefore according to specific embodiment of the utility model, drying is carried out to raw coal, make water content through super-dry raw coal lower than 3wt%, significant to follow-up pyrogenic processes.
S200: pulverization process
According to specific embodiment of the utility model, pulverization process will be carried out respectively through super-dry raw coal and lime, to obtain raw coal powder and lime powder.According to specific embodiment of the utility model, the size of gained raw coal powder and lime powder is also not particularly limited.Utility model finds, raw coal and lime is carried out be ground into the less powder of granularity and can effectively reduce calcium carbide smelting temperature.According to specific embodiment of the utility model, raw coal and lime can be crushed to median size is be not more than raw coal powder and the lime powder of 20 microns, is preferably crushed to mean particle size for being less than 10 microns.Thus, raw coal and lime are mixed with the form of ultrafine powder, raw coal can fully be contacted with lime, improve the two contact area, reduce the temperature of reaction of metallurgy thus further, Reaction time shorten, reduce energy consumption of reaction and production cost.
S300: combination treatment
Further, excessive raw coal powder and lime powder are carried out combination treatment, thus can mixture be obtained.According to specific embodiment of the utility model, owing to there is excessive raw coal, therefore a part of raw coal wherein and calcium oxide react and generate calcium carbide, and remaining raw coal provides a heat in combustion bin combustion and then for smelting calcium carbide, and then save energy consumption for closed electric furnace.
According to concrete example of the present utility model, the mixing match of raw coal powder and lime powder is also not particularly limited, and the actual theoretical amount that excessive raw coal powder can be prepared needed for chemical reaction that calcium carbide occurs with raw coal powder and lime powder calculates.According to specific embodiment of the utility model, raw coal powder and lime powder can be that 1.2:1.04 carries out combination treatment according to mass ratio.According to another specific embodiment of the present utility model, the content at coal dust end, mixture Central Plains can for preparing 1.2 ~ 1.3 times of theoretical amount needed for calcium carbide.Raw coal powder and lime powder not only can be made thus fully to react, simultaneously excessive semicoke, in combustion bin, ingress of air burning, releases large calorimetric, obtains hot solid material, significantly can reduce calcium carbide and smelt energy consumption.According to specific embodiment of the utility model, the excessive raw coal added can burn in follow-up burn processing, improves the temperature of pelletizing material thus, and then is metallurgy saving energy consumption.And burn processing does not need to consume energy consumption, only need the pyrolysis solid product obtained after pyrolysis to contact with air in combustion bin, combustion reactions can occur.
S400: pressure ball process
Above gained mixture is carried out the process of mixing pressure ball, thus spherical material can be obtained.According to embodiment of the present utility model, the granularity of the spherical material of gained is also not particularly limited.Utility model finds, if spherical material particular diameter is excessive, is then unfavorable for that heat transfer is carried out, calcination time can be made significantly to increase, and cost increases; If particle diameter is too small, then easily make material block voidage significantly reduce in calcination process, be unfavorable for heat transfer equally.Therefore, according to specific embodiment of the utility model, the mean diameter of pelletizing material is 10 ~ 40 millimeters, and pelletizing material can directly be sent in rotating bed pyrolysis oven thus.Meanwhile, carry out pressure ball process by raw coal powder and lime powder, significantly can increase the follow-up contact area through pyrolysis processing gained lime and semicoke.Thus, the calcium carbide raw materials for metallurgy that aforesaid method can be utilized to prepare prepares calcium carbide can significantly improve reaction efficiency, reduces smelting temperature and the tap to tap time of calcium carbide, thus reduces calcium carbide production energy consumption and cost.
According to specific embodiment of the utility model, the particle diameter of raw coal and lime is reduced to less than 20 μm (more than 625 orders) pressure ball moldings afterwards, powder raw material contact area is wide, root solves in original calcium carbide technique heat transfer difficult between block and block raw material, very big reduction calcium carbide production temperature, reduces energy consumption and production costs.
S500: pyrolysis processing
According to specific embodiment of the utility model, spherical material obtained above is carried out pyrolysis processing, to obtain artificial petroleum, artificial natural gas and pyrolysis solid product, wherein, pyrolysis solid product contains unslaked lime and semicoke.Raw coal can be made to be converted into by pyrolysis processing thus and can prepare the raw material semicoke etc. of calcium carbide by preparation, what pyrolysis processing can also make raw coal powder contact with lime powder simultaneously is tightr, ensure that pyrolysis rear profile ball physical strength strengthens further thus, and then ensure the normal production of calcium carbide smelting procedure.In addition, in pyrolytic process, create artificial petroleum and the artificial natural gas of high added value, and then improve the utility model and prepare calcium carbide system and produce the economy of calcium carbide.
According to specific embodiment of the utility model, the actual conditions of pyrolysis processing is also not particularly limited, and according to concrete example of the present utility model, can carry out 40 ~ 120 minutes under the pressure of 450 ~ 800 degrees Celsius and 10 ~ 1000Pa.Can make thus raw coal powder and lime powder fully pyrolysis obtain can be used for preparing the semicoke of calcium carbide and the pyrolysis solid product of lime, and then improve the productive rate of calcium carbide.
According to concrete example of the present utility model, pyrolysis processing can also carry out 1 hour under 800 degrees Celsius.Thus can under the prerequisite of abundant pyrolyzed mixture material energy efficient as much as possible, to improve pyrolysis efficiency further and to reduce production cost and energy consumption.
According to specific embodiment of the utility model, the temperature of the pyrolysis solid product obtained through pyrolysis processing for being not less than 450 degrees Celsius, preferably 650 ~ 800 degrees Celsius.Can be that follow-up metallurgy saves energy consumption thus.And anhydrous in pyrolysis solid product, energy expenditure and impact that in traditional calcium carbide production process, in carbon raw, water brings can be reduced.
S600: burn processing
According to specific embodiment of the utility model, pyrolysis solid product heat is delivered in combustion bin and carries out burn processing, to obtain hot solid.According to specific embodiment of the utility model, the bottom of combustion bin is provided with inlet mouth, top is provided with venting port, two heat storages are provided with at inlet mouth place, first single heat storage absorbs furnace of calcium carbide high-temperature tail gas heat, rear commutation is to another heat storage, a small amount of air is first via after the high-temperature thermal storage body heating of accumulation of heat, through reversing valve, high temperature calcium carbide tail gas guide is being entered, high temperature air through heating sends into combustion bin via inlet mouth, in combustion bin, the solid product excessive raw coal in surface and air catalytic combustion, make the temperature of pelletizing material reach about 900 ~ 1000 DEG C.The temperature of pelletizing material can be significantly improved thus through burn processing, and then be that follow-up metallurgy saves energy consumption.
S700: metallurgy
According to specific embodiment of the utility model, the utility model only needs to adopt traditional closed electric furnace to carry out smelting.According to concrete example of the present utility model, be that the hot solid product heat of 900 ~ 1000 degrees Celsius is delivered in closed electric furnace and carried out metallurgy by said temperature, and obtain calcium carbide.Thus, the system preparing calcium carbide of the utility model above-described embodiment effectively utilizes the sensible heat of hot solid product significantly can reduce the energy consumption of metallurgy.
According to specific embodiment of the utility model, first, in advance by superfine powdery that raw coal becomes granularity less with lime pulverizing, increase the contact area between raw coal powder and lime powder, and it is tightr that pyrolysis processing can make raw coal powder contact with lime powder, ensure that pyrolysis rear profile ball physical strength strengthens further thus, and then ensure the normal production of calcium carbide smelting procedure.Secondly, solid product heat pyrolysis obtained delivers to combustion bin, and raw coal dust-firing excessive in combustion bin releases heat, improves the temperature of pelletizing material, and then reduces smelting energy consumption.Therefore, the metallurgy in the system of calcium carbide of preparing of above-described embodiment of the present utility model only needs to carry out 5 ~ 30 minutes under 1400 ~ 2000 degrees Celsius.The necessary temperature 2000 ~ 2300 degrees Celsius that the method prepares calcium carbide relative to tradition smelting thus significantly reduces energy consumption.
According to specific embodiment of the utility model, the condition of preferred metallurgy can be 1600 ~ 1750 degrees Celsius and carry out 10 ~ 15 minutes, more preferably smelts 10 minutes under 1750 degrees Celsius.In this step, coke or semicoke and calcium oxide react the calcium carbide and carbon monoxide that generate molten state, and wherein, the calcium carbide of molten state is discharged in liquid form by closed electric furnace furnace bottom, pulverize and obtain calcium carbide product after cooling.
Hot for oxygen method and closed electric furnace method combine by the system preparing calcium carbide of the utility model above-described embodiment, by mixing with lime powder with excessive raw coal powder in advance, carry out pyrolysis and burning, obtain temperatures as high more than 900 degrees Celsius and the pelletizing material containing semicoke and lime of close contact, thus this pelletizing material heat is delivered in electric furnace and carry out metallurgy, significantly can reduce smelting temperature thus, save tap to tap time, and then save energy consumption.
Embodiment
Raw material:
Take unslaked lime as calcium based raw material, wherein CaO content is greater than 92%;
Take long-flame coal as carbon back raw material, the major traits of this long-flame coal is in table 1.
Table 1
| Project | Unit | Numerical value | Remarks |
| Quan Shui | ％ | 13 | As received basis |
| Fixed carbon | ％ | 58 | Butt |
| Volatile matter | ％ | 36 | Butt |
| Ash content | ％ | 6 | Butt |
Preparation method:
First, adopt chain-and-slat drying machine to carry out drying to raw coal, drying source is 120 ~ 180 DEG C of heat smoke, long-flame coal moisture < 0.8% after dry.
After dry, long-flame coal adopts mechanical abrasive dust broken, and the median size after pulverizing is less than 10 microns.
By the long-flame coal powder after pulverizing and lime powder, mix in intensive mixer according to mass ratio 1.2:1.04, by mixed mixture roller press briquetting, type spherolite degree is 30 × 23 × 18mm.
Sent in pyrolysis installation by type ball after shaping, pyrolysis temperature is 800 DEG C, pyrolysis time 1 hour, pyrolysis product and productive rate as shown in table 2.
Table 2
| Product | Productive rate (%) |
| Solid product | 84.61 |
| Tar | 4.37 |
| Coal gas | 7.49 |
| Pyrolysis water | 3.53 |
In the solid product obtained after pyrolysis, unslaked lime content is 54.87%, and blue carbon content is 45.13%, and wherein in unslaked lime, CaO content is 92%, and in blue charcoal, fixed carbon content is 81.38%.
Pyrolysis solids exit temperature is 750 DEG C, directly sends in furnace of calcium carbide by the solid product of heat, under 1750 degrees Celsius, smelts discharging after 10 minutes, pulverizes after product cooling.Product calcium carbide gas forming amount is 282L/kg, and carbide of calcium content is 75.76%.
Utilize above-mentioned explained hereafter calcium carbide, ton calcium carbide is produced power consumption and is reduced by 23%.
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 utility model or example.In this manual, to the schematic representation of above-mentioned term need not for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (3)
1. prepare a system for calcium carbide, it is characterized in that, comprising:
Drying installation, described drying installation has housing, and described housing exterior walls is provided with thermal source chuck, and described housing limits the dry chamber of raw coal;
Shredding unit, described shredding unit has dry raw coal entrance and raw coal dust outlet, and described dry raw coal entrance is connected with described drying installation;
Mixing device, described mixing device has the outlet of raw coal powdering inlet, lime inlet and mixture, and described raw coal powdering inlet is connected with described raw coal dust outlet;
Press ball device, described press ball device has mixture entrance and pelletizing material outlet, and described mixture entrance exports with described mixture and is connected;
Pyrolysis installation, described pyrolysis installation has pelletizing material inlet and the outlet of pyrolysis solid product, and described pelletizing material inlet is connected with described pelletizing material outlet;
Combustion bin, described combustion bin exports with described pyrolysis solid product and is connected; And
Smelting device, described smelting device has hot solid inlet and calcium carbide outlet, and described hot solid inlet is connected with described combustion bin.
2. the system preparing calcium carbide according to claim 1, is characterized in that, described smelting device is closed electric furnace.
3. the system preparing calcium carbide according to claim 1, is characterized in that, described pyrolysis installation is rotating bed pyrolysis oven.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399097A (en) * | 2015-11-26 | 2016-03-16 | 神雾环保技术股份有限公司 | Calcium carbide preparation device and method |
| CN106477579A (en) * | 2016-11-16 | 2017-03-08 | 神雾环保技术股份有限公司 | A kind of dry shaping method of carbide raw material and its dedicated system |
| CN106833744A (en) * | 2016-12-02 | 2017-06-13 | 神雾环保技术股份有限公司 | The system and method for co-producing acetylene and ferrosilicon |
| CN107840339A (en) * | 2017-12-13 | 2018-03-27 | 神雾环保技术股份有限公司 | A kind of system for producing calcium carbide and method of high temperature conveying |
| CN108046260A (en) * | 2017-12-13 | 2018-05-18 | 神雾环保技术股份有限公司 | A kind of system and method for producing calcium carbide |
-
2014
- 2014-12-30 CN CN201420859414.5U patent/CN204434292U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399097A (en) * | 2015-11-26 | 2016-03-16 | 神雾环保技术股份有限公司 | Calcium carbide preparation device and method |
| CN105399097B (en) * | 2015-11-26 | 2018-08-17 | 神雾环保技术股份有限公司 | The device and method for preparing calcium carbide |
| CN106477579A (en) * | 2016-11-16 | 2017-03-08 | 神雾环保技术股份有限公司 | A kind of dry shaping method of carbide raw material and its dedicated system |
| CN106833744A (en) * | 2016-12-02 | 2017-06-13 | 神雾环保技术股份有限公司 | The system and method for co-producing acetylene and ferrosilicon |
| CN107840339A (en) * | 2017-12-13 | 2018-03-27 | 神雾环保技术股份有限公司 | A kind of system for producing calcium carbide and method of high temperature conveying |
| CN108046260A (en) * | 2017-12-13 | 2018-05-18 | 神雾环保技术股份有限公司 | A kind of system and method for producing calcium carbide |
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Effective date of registration: 20160203 Address after: 100016 Beijing City, Chaoyang District Road No. 5, building 15, floor 7 block C Patentee after: SHENWU ENVIRONMENTAL TECHNOLOGY CO., LTD. Address before: 102200 Beijing city Changping District Machi Town cow Road No. 18 Patentee before: Beijing Shenwu Environment Energy Technology Group Co., Ltd. |
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Granted publication date: 20150701 Termination date: 20181230 |