CN114162822A - Process for producing calcium carbide - Google Patents
Process for producing calcium carbide Download PDFInfo
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- CN114162822A CN114162822A CN202210032052.1A CN202210032052A CN114162822A CN 114162822 A CN114162822 A CN 114162822A CN 202210032052 A CN202210032052 A CN 202210032052A CN 114162822 A CN114162822 A CN 114162822A
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- powder
- calcium carbide
- coal
- rotary kiln
- preheater
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/942—Calcium carbide
Abstract
The invention relates to a process for producing calcium carbide, which comprises the steps of firstly carrying out powdering treatment on limestone, coal and semi-coke, and carrying out a connection calcining procedure consisting of a preheater, a decomposing furnace, a rotary kiln and an electric furnace, wherein the generated calcium carbide is completely cured, so that the traditional equipment and the production process cannot be simulated.
Description
Technical Field
The invention relates to a method for producing calcium carbide by technical means such as a mill, a preheater, an out-of-kiln decomposing furnace, a rotary kiln, an electric furnace and the like, in particular to a process method for producing calcium carbide.
Background
The traditional electric heating process for producing calcium carbide utilizes the heat energy generated by electric arc to make the carbon raw material and lime react at 1700-2200 ℃ to produce the calcium carbide. The main structure of the electric furnace comprises a furnace body and electrodes, electric arcs are generated through electricity when the electric furnace works, the furnace burden is heated by high temperature generated by the electric arcs, and heat required by chemical reaction is achieved by the furnace burden.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a process method for producing calcium carbide, and solves the problems of high power consumption, low yield of a calcium carbide furnace and high cost in calcium carbide production.
Therefore, the technical scheme for solving the problems is as follows: method for producing calcium carbide
The process method comprises the following steps:
(1) grinding raw limestone into limestone powder with a particle size less than 5mm in a grinding machine, and warehousing.
(2) Grinding raw materials coal and semi coke into coal powder less than 5mm in a grinder and warehousing.
(3) After the limestone powder and the coal powder obtained in the steps (1) and (2) are measured, the limestone powder and the coal powder are input into a preheater with the height of more than 20m and more than two calcining intervals for preheating through a batching device.
(4) The heat energy is provided for the preheater and the kiln external decomposing furnace by coal, gas and fuel oil, limestone powder and coal powder in the preheater are calcined, and the limestone powder and the coal powder are decomposed in the kiln external decomposing furnace.
(5) After the lime powder and the coal powder are decomposed, high-temperature lime powder and coal powder are obtained through a U-shaped downward pipeline of the decomposing furnace, and after the lime powder and the coal powder are measured, the lime powder and the coal powder flow into a preheater and then flow into a feed inlet of the rotary kiln through a batching device.
(6) High-temperature lime powder is obtained at a feed inlet of the rotary kiln, coal powder passes through a discharge outlet of the rotary kiln, a combustion chamber for burning coal, gas and fuel oil is arranged, the inner cavity of the rotary kiln is heated to 1350-1500 ℃, the lime powder is obtained from the discharge outlet of the rotary kiln, and the formed liquid phase or block of the coal powder is conveyed to an electric furnace to be continuously heated to 1700-2200 ℃ to obtain the high-quality calcium carbide.
Preferably, the combustion unit formed by the preheater decomposing furnace is provided with more than two combustion units.
Preferably, the feed inlet of the preheater, the feed inlet of the decomposing furnace and the rotary kiln are provided
The feed inlet and the feed inlet of the electric furnace are used for supplying raw materials, and one or more limestone powder, lime powder and coal powder metering and batching devices are arranged.
Preferably, the discharge port of the rotary kiln is connected with the feed port of the electric furnace, and one electric furnace or more than one electric furnace is arranged.
Compared with the prior art, the invention has the following positive effects: firstly, carrying out powdering treatment on raw materials limestone and coal to ensure that the raw materials to enter a calcium carbide furnace do not appear in the shapes of lime blocks and semi-coke blocks any more; in the subsequent primary calcining and curing calcining stage, the completely cured calcium carbide structure produced by the continuous calcining procedure consisting of the preheater, the kiln outside decomposing furnace and the rotary kiln electric furnace is incomparable with the traditional equipment and production process, and the heat preservation structure and the material copying device structure of the inner cavity of the rotary kiln make the performance of the rotary kiln superior to that of the conventional technology.
Drawings
FIG. 1 is a schematic flow chart of a process for producing calcium carbide according to the present invention.
Detailed Description
Before the embodiment of the invention is developed, the traditional calcium carbide production process needs to be analyzed, and the problems existed before and now are as follows: the disadvantages of the electric furnace structure are: the periphery in the furnace is provided with a plurality of electric arcs which can not act or have very poor action effect, namely a non-molten pool area, so that the temperature of the areas can not meet the reaction requirement, the furnace burden in the area is difficult to react, and the effective utilization rate of electric energy is only that due to too large difference of heat distribution, the electric arc is used for generating electric energy
40%-60%。
So far, referring to fig. 1, the implementation of the steps of the process for producing calcium carbide according to the present invention fully embodies the features of the present invention. For example, starting from limestone, coal, semi-coke raw materials, the process comprises the following steps:
(1) grinding raw limestone into limestone powder with a particle size less than 5mm in a grinding machine, and warehousing.
(2) Grinding raw materials coal and semi coke into coal powder less than 5mm in a grinder and warehousing.
(3) After the limestone powder and the coal powder obtained in the steps (1) and (2) are measured, the limestone powder and the coal powder are input into a preheater with the height of more than 20m and more than two calcining intervals for preheating through a batching device.
(4) The heat energy is provided for the preheater and the kiln external decomposing furnace by coal, gas and fuel oil, limestone powder and coal powder in the preheater are calcined, and the limestone powder and the coal powder are decomposed in the kiln external decomposing furnace.
(5) After the lime powder and the coal powder are decomposed, high-temperature lime powder and coal powder are obtained through a U-shaped downward pipeline of the decomposing furnace, and after the lime powder and the coal powder are measured, the lime powder and the coal powder flow into a preheater and then flow into a feed inlet of the rotary kiln through a batching device.
(6) High-temperature lime powder is obtained at a feed inlet of the rotary kiln, coal powder passes through a discharge outlet of the rotary kiln, a combustion chamber for burning coal, gas and fuel oil is arranged, the inner cavity of the rotary kiln is heated to 1350-1500 ℃, the lime powder is obtained from the discharge outlet of the rotary kiln, and the formed liquid phase or block of the coal powder is conveyed to an electric furnace to be continuously heated to 1700-2200 ℃ to obtain the high-quality calcium carbide.
Aiming at the quality of calcium carbide, the invention is used for combustion between the preheater and the kiln external decomposing furnace
The system is redesigned, the preheater is designed into a second-stage preheater or a preheater with more than two stages, in particular, in order to improve the calcining quality of the powdery limestone and the pulverized coal, compared with the prior art, the calcining space of the preheater is designed into independent preheaters which are respectively formed and can be connected with each other through pipelines, the number of combustion chambers in a combustion unit formed by the preheater and a kiln outer decomposing furnace can be more than two, and meanwhile, a material stirring device is arranged in the inner cavity of the rotary kiln, so that the powder can be fully and uniformly stirred, the calcium carbide calcining effect is realized, and the optimization is improved.
The above examples demonstrate that the process for producing calcium carbide according to the invention can greatly improve the process level of the traditional calcium carbide production process, and the traditional calcium carbide production process comprises the steps of putting lime blocks and blue carbon blocks into an electric furnace from normal temperature, and heating to 1700-220 ℃ to obtain the calcium carbide. The invention relates to a process for producing calcium carbide, which comprises the steps of heating limestone powder and coal powder to 1350-1500 ℃ in a preheater, a decomposing furnace and a rotary kiln to form liquid phase or blocks, putting the liquid phase or blocks into an electric furnace, and continuously heating the liquid phase or blocks to 1700-2200 ℃ to obtain high-quality calcium carbide, namely saving electricity by more than 40% in the production of the calcium carbide.
Claims (9)
1. A process method for producing calcium carbide comprises the following steps:
(1) grinding raw limestone into limestone powder with a particle size less than 5mm in a grinding machine, and warehousing.
(2) Grinding raw materials coal and semi coke into coal powder less than 5mm in a grinder and warehousing.
(3) After the limestone powder and the coal powder obtained in the steps (1) and (2) are measured, the limestone powder and the coal powder are input into a preheater with the height of more than 20m and more than two calcining intervals for preheating through a batching device.
(4) The heat energy is provided for the preheater and the kiln external decomposing furnace by coal, gas and fuel oil, limestone powder and coal powder in the preheater are calcined, and the limestone powder and the coal powder are decomposed in the kiln external decomposing furnace.
(5) After the lime powder and the coal powder are decomposed, high-temperature lime powder and coal powder are obtained through a U-shaped downward pipeline of the decomposing furnace, and after the lime powder and the coal powder are measured, the lime powder and the coal powder flow into a preheater and then flow into a feed inlet of the rotary kiln through a batching device.
(6) High-temperature lime powder is obtained at a feed inlet of the rotary kiln, coal powder passes through a discharge outlet of the rotary kiln, a combustion chamber for burning coal, gas and fuel oil is arranged, the inner cavity of the rotary kiln is heated to 1350-1500 ℃, the lime powder is obtained from the discharge outlet of the rotary kiln, and the formed liquid phase or block of the coal powder is conveyed to an electric furnace to be continuously heated to 1700-2200 ℃ to obtain the high-quality calcium carbide.
2. According to the claims: the process method for producing the calcium carbide is characterized in that one or more limestone powder, lime powder and coal powder metering and batching devices are arranged at the feed inlet of the preheater, the feed inlet of the decomposing furnace, the feed inlet of the rotary kiln and the feed inlet of the electric furnace.
3. According to the claims: the process method for producing the calcium carbide is characterized in that a discharge hole of the rotary kiln is connected with a feed inlet of an electric furnace, and one electric furnace or more than one electric furnace is arranged.
4. According to the claims: the process method for producing the calcium carbide is characterized in that a waste discharge pipeline is connected to the bottom of the decomposing furnace, the waste discharge pipeline is connected with a hot air outlet pipeline at a feed inlet of the rotary kiln to obtain hot air, and oxygen is provided for calcining the calcium carbide by using coal, gas and fuel oil of the decomposing furnace.
5. According to the claims: the process method for producing the calcium carbide is characterized in that more than two combustion units are arranged on a combustion unit formed by the preheater and the kiln outer decomposing furnace.
6. According to the claims: the process method for producing the calcium carbide is characterized in that the number of calcining intervals of the preheater is more than two, and each calcining interval is formed independently and is mutually independent and connected through a pipeline.
7. According to the claims: the process method for producing the calcium carbide is characterized in that a heat-insulating material is arranged in an inner cavity of the rotary kiln.
8. According to the claims: the process method for producing the calcium carbide is characterized in that a material-making device is arranged in an inner cavity of the rotary kiln.
9. According to the claims: the process method for producing the calcium carbide is characterized in that a refractory brick in an inner cavity of the rotary kiln is provided with a bulge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210032052.1A CN114162822A (en) | 2022-01-12 | 2022-01-12 | Process for producing calcium carbide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210032052.1A CN114162822A (en) | 2022-01-12 | 2022-01-12 | Process for producing calcium carbide |
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| CN114162822A true CN114162822A (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210032052.1A Pending CN114162822A (en) | 2022-01-12 | 2022-01-12 | Process for producing calcium carbide |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1342217A (en) * | 1962-09-22 | 1963-11-08 | Elektrokemisk As | Process and plant for the production of calcium carbide |
| CN102951640A (en) * | 2012-11-12 | 2013-03-06 | 石家庄新华能源环保科技股份有限公司 | Calcium carbide producing device |
| CN103880302A (en) * | 2014-02-21 | 2014-06-25 | 米长山 | Technique method for producing active lime |
| CN105236409A (en) * | 2015-09-09 | 2016-01-13 | 中冶南方工程技术有限公司 | Calcium carbide smelting process |
| CN105293497A (en) * | 2015-11-16 | 2016-02-03 | 中冶南方工程技术有限公司 | Calcium carbide smelting process by oxygen heating method |
| CN107055535A (en) * | 2017-04-20 | 2017-08-18 | 杜金厂 | A kind of powder calcium oxide and carbon dust decompose calcium carbide device and its technique |
| CN110498622A (en) * | 2019-09-12 | 2019-11-26 | 广西四维材料科技股份有限公司 | A kind of method of the outer decomposing and calcining calcium oxide of powder multistage suspension preheating kiln |
| CN113184852A (en) * | 2021-05-23 | 2021-07-30 | 上海柯来浦能源科技有限公司 | Production device for calcium carbide co-production lime |
-
2022
- 2022-01-12 CN CN202210032052.1A patent/CN114162822A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1342217A (en) * | 1962-09-22 | 1963-11-08 | Elektrokemisk As | Process and plant for the production of calcium carbide |
| CN102951640A (en) * | 2012-11-12 | 2013-03-06 | 石家庄新华能源环保科技股份有限公司 | Calcium carbide producing device |
| CN103880302A (en) * | 2014-02-21 | 2014-06-25 | 米长山 | Technique method for producing active lime |
| CN105236409A (en) * | 2015-09-09 | 2016-01-13 | 中冶南方工程技术有限公司 | Calcium carbide smelting process |
| CN105293497A (en) * | 2015-11-16 | 2016-02-03 | 中冶南方工程技术有限公司 | Calcium carbide smelting process by oxygen heating method |
| CN107055535A (en) * | 2017-04-20 | 2017-08-18 | 杜金厂 | A kind of powder calcium oxide and carbon dust decompose calcium carbide device and its technique |
| CN110498622A (en) * | 2019-09-12 | 2019-11-26 | 广西四维材料科技股份有限公司 | A kind of method of the outer decomposing and calcining calcium oxide of powder multistage suspension preheating kiln |
| CN113184852A (en) * | 2021-05-23 | 2021-07-30 | 上海柯来浦能源科技有限公司 | Production device for calcium carbide co-production lime |
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