CN102653403A - Process method for preparing calcium carbide by recycling calcium carbide slag - Google Patents

Process method for preparing calcium carbide by recycling calcium carbide slag Download PDF

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Publication number
CN102653403A
CN102653403A CN2012101528523A CN201210152852A CN102653403A CN 102653403 A CN102653403 A CN 102653403A CN 2012101528523 A CN2012101528523 A CN 2012101528523A CN 201210152852 A CN201210152852 A CN 201210152852A CN 102653403 A CN102653403 A CN 102653403A
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China
Prior art keywords
carbide
carbide slag
calcium carbide
slag
tail gas
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CN2012101528523A
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Chinese (zh)
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CN102653403B (en
Inventor
韩学池
竹志勇
何龙
李万阳
何锐
张道华
李蓉
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MCC5 GROUP CHENGDU ENERGY-SAVING ENGINEERING TECHNOLOGY SERVICE Co Ltd
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MCC5 GROUP CHENGDU ENERGY-SAVING ENGINEERING TECHNOLOGY SERVICE Co Ltd
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Priority to CN201210152852.3A priority Critical patent/CN102653403B/en
Publication of CN102653403A publication Critical patent/CN102653403A/en
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Abstract

The invention discloses a process method for preparing calcium carbide by recycling calcium carbide slag. The process method is characterized by comprising the following steps of: (1) dehydrating the calcium carbide slag, generating calcium carbide slag raw materials, and drying carbocoal; and (2) adding the calcium carbide slag raw materials and the carbocoal into a calcium carbide furnace for smelting to generate the calcium carbide, calcium carbide sensible heat and tail gas. According to the process method, the calcium carbide slag can be recycled, so that labors and resources for treating the calcium carbide slag serving as waste are saved, and the resource utilization rate is increased; and moreover, the tail gas produced by generation of the calcium carbide is fully and effectively used, so that the method is suitable for popularization and application.

Description

A kind ofly reclaim the process method that carbide slag prepares calcium carbide
Technical field
The present invention relates to a kind of process method for preparing calcium carbide, specifically be meant a kind of process method that carbide slag prepares calcium carbide that reclaims.
Background technology
When using calcium carbide to prepare acetylene or SE, will produce a large amount of carbide slags, the staple of carbide slag is Ca (OH) 2.The carbide slag slurries water cut is big and alkalescence is high, is the major polluting sources of sewage network.The long-term accumulation of carbide slag not only takies a large amount of soils, and there is serious erosion action in the soil.Therefore, national environmental protection portion includes carbide slag in II class general industry solid waste, requires to manage.At present, the carbide slag that produces in the production process all is as offal treatment, therefore, handles these carbide slag wastes and not only need spend lot of manpower and material resources, has also caused the waste of resource.
Summary of the invention
The objective of the invention is to overcome all is not only need spend lot of manpower and material resources as offal treatment with the carbide slag that produces in the production process at present; Also caused the defective of the waste of resource, provide a kind of and can a kind ofly reclaim the process method that carbide slag prepares calcium carbide what carbide slag was recycled.
The present invention realizes through following technical proposals: a kind ofly reclaim the process method that carbide slag prepares calcium carbide, may further comprise the steps:
(1) carbide slag is carried out processed, and generate the carbide slag raw material, dry blue carbon simultaneously;
(2) carbide slag raw material and blue carbon are added smelting generation calcium carbide in the furnace of calcium carbide, and produce acetylene stones sensible heat and tail gas.
Further, step (1) uses acetylene stones sensible heat to dry blue carbon.
Further again, the tail gas that step (2) produces is collected, and from tail gas, isolated calcium carbide tail gas dust and combustion gas.
In order to satisfy the demand, the carbide slag dehydration in the said step (1) realizes through the following step:
(1a) carbide slag is dewatered;
(1b) with carbide slag and calcium carbide tail gas mix dust and push balling-up, generate the carbide slag mixing raw material;
(1c) the carbide slag mixing raw material is added in the carbide slag kin dewater, and generate the carbide slag raw material.
In order to better meet needs, the water cut of the carbide slag after said step (1a) dehydration is less than 15%.
For the ease of recycling blue carbon dust, in said carbide slag mixing raw material, also be added with blue carbon dust.
In order better to realize the present invention, the combustion gas of using step (3) to produce in the step (1b) is calcined the carbide slag mixing raw material.
In order to ensure effect, in the combustion gas feeding limestone kiln with step (3) generation Wingdale is calcined, and generated unslaked lime, then smelting in the blue carbon adding furnace of calcium carbide after unslaked lime and the oven dry is generated calcium carbide.
The present invention compared with prior art has the following advantages and beneficial effect:
(1) the present invention utilize recovery carbide slag as the feedstock production calcium carbide, therefore practiced thrift carbide slag as the required manpower and materials of offal treatment, also improved the utilization ratio of material simultaneously, therefore practiced thrift resource.
(2) blue carbon of the present invention uses the acetylene stones sensible heat of smelting the calcium carbide generation to dry, and has therefore utilized the energy that produces in the production process fully, has improved rate of energy, has practiced thrift resource.
(3) the present invention will smelt the tail gas that calcium carbide produces and reclaim, and calcium carbide tail gas dust and combustion gas in the tail gas are separated, and therefore can prevent directly discharging and atmosphere pollution can also make things convenient for subsequent handling use this calcium carbide tail gas dust and combustion gas of tail gas.
(4) the present invention is used for mixing with carbide slag the back with the calcium carbide tail gas dust and generates the carbide slag mixing raw material, thereby is used to prepare calcium carbide, has therefore made full use of this calcium carbide tail gas dust, has improved utilization ratio of raw materials, has practiced thrift resource.
(5) combustion gas of the present invention's generation is used for carbide slag drying and carbide slag raw material, has therefore made full use of calcium carbide tail gas, has practiced thrift the energy.
(6) the present invention also utilizes the gas calcining Wingdale, thereby generates unslaked lime, and uses this unslaked lime to prepare calcium carbide, thereby has made full use of the energy of combustion gas, has improved the utilization ratio of calcium carbide tail gas; Use this unslaked lime to prepare calcium carbide simultaneously and can also produce tail gas endlessly, therefore formed the system that recycles of tail gas.
Embodiment
Below in conjunction with embodiment the present invention is done to specify further, but embodiment of the present invention is not limited thereto.
Embodiment
The present invention reclaims the depleted carbide slag in order to the preparation calcium carbide; And produce carbide slag when using calcium carbide to prepare product such as acetylene or SE; And then the carbide slag that generates reclaimed in order to the preparation calcium carbide, thereby form the recycling system of carbide slag, therefore practiced thrift the energy.
Need carry out processed to carbide slag when using carbide slag to prepare calcium carbide, and generate the carbide slag raw material, also need blue carbon oven dry be produced calcium carbide with smelting in carbide slag raw material and the blue carbon adding furnace of calcium carbide then simultaneously.Furnace of calcium carbide also produces acetylene stones sensible heat and tail gas when smelting carbide slag raw material and blue carbon generation calcium carbide; The present invention then collects the acetylene stones sensible heat that produces through the acetylene stones sensible heat recovery system; Use the acetylene stones sensible heat of this collection to dry blue carbon then; Therefore utilize the energy of acetylene stones sensible heat fully, thereby practiced thrift the energy.
Owing to contain the mixture dust that carbide slag and blue carbon form in the tail gas, i.e. the calcium carbide tail gas dust; Also contain CO gas, i.e. combustion gas simultaneously; Cause topsoil in order to prevent this tail gas from directly discharging, cause the waste of the energy simultaneously, the present invention then collects this tail gas.The present invention derives the tail gas that generates in the furnace of calcium carbide through the calcium carbide tail gas recovery channel, through fly-ash separator the calcium carbide tail gas dust separation is come out then, and with this calcium carbide tail gas dust collection in the dust storehouse, so that recycle.Tail gas through in the calcium carbide tail gas recovery channel after the fly-ash separator processing then only contains combustion gas, and this combustion gas can directly be used for combustion.
Using carbide slag to need to use the carbide slag water extracter that carbide slag is dewatered before producing, the present invention directly will pass through combustion gas after fly-ash separator is handled and feed in the carbide slag water extracter through the calcium carbide tail gas recovery channel carbide slag is carried out prebake.In order fully to use the calcium carbide tail gas dust that reclaims; This calcium carbide tail gas dust is reused for the smelting calcium carbide; Thereby with the calcium carbide tail gas dust be squeezed into after carbide slag mixes smelt required spherical; This prebake only needs the free-water of carbide slag is partly removed, and the water cut of carbide slag is got final product less than 15%.Then the carbide slag after the calcium carbide tail gas dust of collecting and the dehydration is added in the ashes batch mixing stirrer and mix, and generation carbide slag mixing raw material.
Because it is all bigger directly to add the volume of the blue carbon of smelting in the furnace of calcium carbide; The less blue carbon of some volumes then goes out of use; In order to make full use of the less blue carbon of volume that goes out of use; Can mixes back formation with the carbide slag mixing raw material spherical with should orchid carbon adding in the ashes batch mixing stirrer, thus should fully use by orchid carbon, in order to avoid cause waste.Need blue carbon be ground in the coal pulverizing mill before use, blue carbon formed mix needed particle diameter, mix with this orchid carbon dust and combine well to guarantee the carbide slag mixing raw material with the carbide slag mixing raw material.Blue carbon dust after will grinding then also adds in the ashes batch mixing stirrer, makes blue carbon dust and carbide slag mixing raw material thorough mixing, and forms the carbide slag mixing raw material that contains blue carbon.This carbide slag mixing raw material that is mixed with blue carbon is added in the carbide slag balling head and pushes balling-up, this globular mixture is added in carbide slag kin dewater then, promptly this spherical mixture is dried once more.The present invention will pass through in the combustion gas feeding carbide slag kin in the calcium carbide tail gas recovery channel after fly-ash separator is handled through pipeline once more globular carbide slag mixing raw material will be calcined; Smelt the tail gas that calcium carbide produced thereby made full use of, and the carbide slag mixing raw material that the calcining back is dried is the carbide slag raw material.
Can generate calcium carbide with smelting in the blue carbon adding furnace of calcium carbide after above carbide slag raw material that makes and the oven dry, then produce tail gas endlessly when generating calcium carbide in the furnace of calcium carbide, this tail gas then is used to prepare the carbide slag raw material once more.Because be used for preparing the combustion gas of carbide slag raw material and be the sub-fraction of the combustion gas that furnace of calcium carbide produces, in order to make full use of these combustion gas on the spot, to improve resource utilization, the present invention also uses this combustion gas to be used to prepare unslaked lime.During use combustion gas fed in the limestone kiln Wingdale is calcined, can make full use of combustion gas, and generate unslaked lime, then the blue carbon after this unslaked lime and the oven dry is added to smelt in the furnace of calcium carbide and can generate calcium carbide, produce tail gas simultaneously.Use unslaked lime and blue carbon effect to generate the output that calcium carbide can improve calcium carbide greatly; Simultaneously can also make full use of the tail gas that produces in the production process; And the cyclic utilization system of formation tail gas, therefore improved utilization ratio of raw materials widely, practiced thrift cost and resource.
As stated, just can realize the present invention preferably.

Claims (8)

1. one kind is reclaimed the process method that carbide slag prepares calcium carbide, it is characterized in that, may further comprise the steps:
(1) carbide slag is carried out processed, and generate the carbide slag raw material, dry blue carbon simultaneously;
(2) carbide slag raw material and blue carbon are added smelting generation calcium carbide in the furnace of calcium carbide, and produce acetylene stones sensible heat and tail gas.
2. a kind of process method that carbide slag prepares calcium carbide that reclaims according to claim 1 is characterized in that, step (1) uses acetylene stones sensible heat to dry blue carbon.
3. a kind of process method that carbide slag prepares calcium carbide that reclaims according to claim 1 and 2 is characterized in that, the tail gas that step (2) produces is collected, and from tail gas, isolated calcium carbide tail gas dust and combustion gas.
4. a kind of process method that carbide slag prepares calcium carbide that reclaims according to claim 3 is characterized in that, the carbide slag dehydration in the said step (1) realizes through the following step:
(1a) carbide slag is dewatered;
(1b) with carbide slag and calcium carbide tail gas mix dust and push balling-up, generate the carbide slag mixing raw material;
(1c) the carbide slag mixing raw material is added in the carbide slag kin dewater, and generate the carbide slag raw material.
5. a kind of process method that carbide slag prepares calcium carbide that reclaims according to claim 4 is characterized in that, the water cut of the carbide slag after said step (1a) dehydration is less than 15%.
6. according to claim 4 or 5 described a kind of process methodes that carbide slag prepares calcium carbide that reclaim, it is characterized in that, in said carbide slag mixing raw material, also be added with blue carbon dust.
7. a kind of process method that carbide slag prepares calcium carbide that reclaims according to claim 6 is characterized in that, the combustion gas of using step (3) to produce in the step (1b) is calcined the carbide slag mixing raw material.
8. a kind of process method that carbide slag prepares calcium carbide that reclaims according to claim 7; It is characterized in that; In the combustion gas feeding limestone kiln with step (3) generation Wingdale is calcined; And generation unslaked lime, the blue carbon after unslaked lime and the oven dry is added smelt the generation calcium carbide in the furnace of calcium carbide then.
CN201210152852.3A 2012-05-17 2012-05-17 Process method for preparing calcium carbide by recycling calcium carbide slag Active CN102653403B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104828824A (en) * 2015-03-24 2015-08-12 中国科学院过程工程研究所 A method of preparing calcium carbide by co-molding of carbide slag and coke powder
CN105502460A (en) * 2015-12-18 2016-04-20 石河子大学 Method for producing calcium carbide raw materials through carbide slag
CN105969424A (en) * 2016-07-07 2016-09-28 中盐吉兰泰盐化集团有限公司 System for producing acetylene gas by using recycled calcium carbide dust

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1035094A (en) * 1988-02-08 1989-08-30 重庆建筑工程学院 Use production of calcium carbide from its residue
CN1458063A (en) * 2003-05-30 2003-11-26 樊张帆 Process for preparing high calcium carbide product and producing calcium carbide carbide using calcium carbide waste slag
CN101327928A (en) * 2008-08-01 2008-12-24 北京化工大学 Calcium carbide production method
CN101805003A (en) * 2009-06-08 2010-08-18 王嘉兴 Method for using carbide slag for material circulation system in carbide industry
CN101816873A (en) * 2010-05-06 2010-09-01 云南云维股份有限公司 Method and device for purifying calcium carbide furnace tail gas by using negative pressure dry process
CN101837954A (en) * 2010-05-18 2010-09-22 浙江工业大学 Method for preparing hydrogen by using tail gas of calcium carbide furnace
CN102258923A (en) * 2011-04-29 2011-11-30 青海宜化化工有限责任公司 Method for recycling and reusing tail gas of calcium carbide furnace
CN202158785U (en) * 2011-07-29 2012-03-07 中国五冶集团有限公司 Closed calcium carbide furnace smoke heat recovery device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1035094A (en) * 1988-02-08 1989-08-30 重庆建筑工程学院 Use production of calcium carbide from its residue
CN1458063A (en) * 2003-05-30 2003-11-26 樊张帆 Process for preparing high calcium carbide product and producing calcium carbide carbide using calcium carbide waste slag
CN101327928A (en) * 2008-08-01 2008-12-24 北京化工大学 Calcium carbide production method
CN101805003A (en) * 2009-06-08 2010-08-18 王嘉兴 Method for using carbide slag for material circulation system in carbide industry
CN101816873A (en) * 2010-05-06 2010-09-01 云南云维股份有限公司 Method and device for purifying calcium carbide furnace tail gas by using negative pressure dry process
CN101837954A (en) * 2010-05-18 2010-09-22 浙江工业大学 Method for preparing hydrogen by using tail gas of calcium carbide furnace
CN102258923A (en) * 2011-04-29 2011-11-30 青海宜化化工有限责任公司 Method for recycling and reusing tail gas of calcium carbide furnace
CN202158785U (en) * 2011-07-29 2012-03-07 中国五冶集团有限公司 Closed calcium carbide furnace smoke heat recovery device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
唐旭博等: "电石制备过程中不同含钙化合物与焦炭的反应行为研究", 《燃料化学学报》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104828824A (en) * 2015-03-24 2015-08-12 中国科学院过程工程研究所 A method of preparing calcium carbide by co-molding of carbide slag and coke powder
CN105502460A (en) * 2015-12-18 2016-04-20 石河子大学 Method for producing calcium carbide raw materials through carbide slag
CN105969424A (en) * 2016-07-07 2016-09-28 中盐吉兰泰盐化集团有限公司 System for producing acetylene gas by using recycled calcium carbide dust

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