CN108502884A - A method of producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification - Google Patents
A method of producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification Download PDFInfo
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- CN108502884A CN108502884A CN201810247175.0A CN201810247175A CN108502884A CN 108502884 A CN108502884 A CN 108502884A CN 201810247175 A CN201810247175 A CN 201810247175A CN 108502884 A CN108502884 A CN 108502884A
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- calcium carbide
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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
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Abstract
The invention discloses a kind of methods producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification, this method is by the calcium carbide furnace gas dedusting ash of recycling, with calcium lime powder mix and convert, the grey ratio of purification is 0 ~ 70%, using calcium lime powder ontology as binder, it is pressed into pelletizing through high-pressure ball press, is transported to calcium carbide smelting furnace as raw material.The present invention proposes pressure ball molding method of the furnace of calcium carbide purification ash recycling as calcium carbide raw materials for metallurgy, and processing technology is easy, saves equipment investment, has preferable promotional value.
Description
Technical field
The present invention relates to a kind of methods producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification, belong to coal
Chemical Engineering circular economy technical field.
Background technology
Calcium carbide is the important basic chemical raw materials of coal chemical industry, and gas is welded mainly for the production of PVC plastic, lime nitrogen, oxycetylene
Deng and organic synthesis technique.Closed type calcium carbide furnace produces the technological requirement of calcium carbide, and primary raw material raw material of wood-charcoal, quick lime all have centainly
Physical form, i.e., raw material of wood-charcoal granularity be 5 ~ 25mm, quick lime granularity be 5 ~ 40mm.Raw material of wood-charcoal, quick lime are required to sieve and remove thus
Powder is removed, furnace of calcium carbide smelting processing could be sent into.
Modern calcium carbide production technology passes through arc heat and resistance using lime and coke as raw material in closed calcium carbide furnace
Solid phase fusion reaction occurs for heat, and a large amount of high temperature calcium carbide burner gas is will produce in reaction process, and main component is carbon monoxide
And contain a large amount of solid dusts.Dust content is 50 ~ 150g/Nm3, wherein CaO（Quick lime）>50%, C（Raw material of wood-charcoal）>25%, also
Contain other metal impurities etc..Calcium carbide burner gas need to carry out processing by purifier to be recycled.Stove when purified treatment
Gas initially enters settler and 40 ~ 50% large dust particle settles down, and then carries out cooling dedusting through air cooler, enters back into
Bag filter carries out smart filtering, and the solid dust collected through settler, air cooler and bag filter commonly referred to as purifies
Dedusting ash（Referred to as purify ash）.Current main processing mode is that air storage or burial are handled, and are contained in ash content higher
Calcium oxide, magnesia, bases and cyanogen etc., this way not only land occupation, but also air and underground water can be polluted, enterprise is pacified
Full production and surrounding enviroment are affected, and can cause serious environmental pollution and the wasting of resources.Therefore, exploitation purification ash recycling profit
With technology, there is larger environmental protection, economic and social benefit.
Patent（CN201410027951.8）A kind of calcium carbide furnace purification ash back-to-furnace combustion system is disclosed, including sealed net
Ashing collecting bin, Geldart-D particle transmitter, sealed blanking bin, conveying air source and mixed flow room；To the grey collecting bin of sealed purification
It is connected to inputting both to have nitrogen and make in Geldart-D particle transmitter, pneumatic carrier connects sealed blanking bin and pneumatic transporting
Transmitter is sent, and pneumatic carrier has been also passed into nitrogen, conveying air source is the pressure source of terminal conveying；It can be directly to coming from
The purification ash of calcium carbide production equipment carries out site transport recycling, overcomes purification ash because of characteristics such as tool high temperature, inflammable and explosive, adhesions
And the problem that the recycling conveying that brings is difficult, realize site transport it is smooth, without blocking；The setting of sealed blanking bin can ensure
Feed the stabilization of the grey conveying capacity of purification in combustion furnace；The freight that purification ash recycles can be eliminated, the output value is improved,
Increase profit income, has also obtained energy-saving benefit in addition, and realize the purpose of pollution reduction.
Patent（CN201521084553.6）Disclose a kind of calcium carbide purification ash treatment system, including rack, bulk cement storage tank and
Humidifier, the bulk cement storage tank and humidifier are from top to bottom set in the rack successively, and the bottom of the bulk cement storage tank, which is equipped with, unloads
Purification ash in the bulk cement storage tank is drained into the humidifier by ash cellar, the ash unloading bin, and the humidifier adds purification ash
Retracting device is expelled to after wet.A kind of calcium carbide provided by the utility model purifies ash treatment system, which will purify ash recycling
After can be used as clinker use, both solve the problems, such as discharge purification ash airborne dust, also improve economic benefit.
Patent（CN201611016326.9）A kind of furnace of calcium carbide purification ash gas conveying incinerator is disclosed, which presses
It includes drawing formula material sending device under purification ash cellar, eddy flow, concentrating ash cellar, burn fluidized bed furnace to purify ash flow direction successively according to furnace of calcium carbide
And waste residue ash cellar, it is connected by conveyance conduit between above equipment.The present invention realizes overall process conveying no pollution, avoids simultaneously
Dust removal of calcium carbide furnace inflammable security risk brought in transport, stacking process avoids the environment that the modes such as landfill are brought
Pollution solves the country and purifies grey secondary pollution to highly energy-consuming electric furnace, effectively improves working environment, make calcium carbide industry clean manufacturing
Technical merit is greatly improved, and promotes calcium carbide industry to develop towards the direction of clean and effective, while whole device is simple in structure,
It is economical and practical.
The present invention proposes pressure ball molding method of the furnace of calcium carbide purification ash recycling as calcium carbide raw materials for metallurgy.According to furnace of calcium carbide
The main component of purification ash is CaO（Quick lime）、C（Raw material of wood-charcoal）Deng the life stone carried from calcium carbide burner gas when smelting calcium carbide
Ash, raw material of wood-charcoal raw material propose that recycling purification ash is used as raw material of calcium carbide furnace.According to furnace of calcium carbide technological requirement, raw material must have
The physical behavior of certain size, purifying grey powder cannot directly utilize, and propose mix and convert calcium lime powder, be that enhancing is viscous with calcium lime powder
Agent is tied, does not introduce the third substance as progress dry method pressure ball after binder, and purification ash mixing, when eliminating reuse production calcium carbide
The influence of impurity.It is aqueous according to purification ash<1%, it need not dry after mix and convert calcium lime powder pressure ball, calcium carbide can be fed directly to
Stove is used as raw material.The above main feature of the present invention is different from the main contents of the above patent disclosure.
By the Internet search query, do not search with a kind of grey mix and convert of production calcium carbide furnace of calcium carbide purification of the present invention yet
The similar public information of method of calcium lime powder pressure ball molding.
Invention content
The object of the present invention is to provide a kind of sides producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification
Method.The present invention has the characteristics that following apparent：
（1）The grey grain size very little of furnace of calcium carbide purification, fineness is larger, and 0 ~ 20 μm reaches 80% or more, itself has stronger caking property.
（2）The grey mix and convert calcium lime powder pressure ball molding of purification, is enhancing binder with calcium lime powder ontology, is added without water and its
His additive.Because purification ash, calcium lime powder are the raw material that calcium carbide is smelted, it is added without other the third additives, pressure ball molding
After be back to smelting calcium carbide, eliminate the influence that impurity produces calcium carbide.Calcium lime powder is added simultaneously, purification ash can be inhibited certainly
Combustion.
（3）To purification ash and calcium lime powder dry method pressure ball, it is waterproof and dampproof to purify grey storage environment；Purification ash uses pipeline N2
Air-flow conveys；The batch mixing pelletizing of compacting is aqueous≤and 1%, it can need not be dried, be calcined directly as raw material of calcium carbide furnace.
（4）The grey content of MgO of purification is higher, reaches 20 ~ 30%.The harm that MgO produces calcium carbide is larger, fast in melting zone
Speed is reduced into magnesium metal.In magnesium steam uphill process with CO and O2A large amount of heat is released in reaction again leads to that boiler face is rubescent, stove
Material forms shell and furnace gas is hindered to rise, and molten bath shell is destroyed when serious, and high-temperature fusion liquid directly contacts scaling loss fire resisting with refractory brick
Brick, calcium carbide runner are blocked.
According to content of MgO in the quick lime of production calcium carbide<1.8% quality index adjusts the addition of the grey batch mixing pelletizing of purification
The ratio of furnace of calcium carbide.Under normal circumstances, purification ash（Content of MgO about 20%）Furnace of calcium carbide is added in the batch mixing pelletizing of content 50%, right
Quick lime（Content of MgO about 1%）Ratio be no more than 8%.
According to production consumption of calcium carbide quota, about 0.9 ton of consumption of calcium carbide quick lime per ton generates purification ash about 50kg, raw stone
Ashes about 380kg.1. such as content of MgO about 0.5% in quick lime, content of MgO about 20% in purification ash contains according to MgO in quick lime
Amount<Purification grey pressure ball reuse 58kg when producing calcium carbide per ton, can be more than the grey yield 50kg of purification by 1.8% quality index,
Whole purification ashes can be recycled.2. such as content of MgO about 1% in quick lime, content of MgO about 20% in purification ash, according to quick lime
Middle content of MgO<1.8% quality index, when producing calcium carbide per ton, can will the grey pressure ball reuse 36kg of purification, still residue 14 ~
34kg purification ashes need other modes to handle.The above analysis it may be concluded that can fully recovering purification ash, depend primarily on
The height of content of MgO in quick lime.
The present invention proposes that the furnace of calcium carbide purification ash generally discarded before recycling, pressure ball molding are back to smelting calcium carbide.Processing
Simple process, the equipment mature and reliable needed, operating cost is low, solves the important technical that calcium carbide industry purification ash recycles
Problem has larger promotional value.
A kind of the step of method producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification of the present invention includes：
In the purifying and dedusting ash 1 that calcium carbide furnace gas process is collected, it is transported to batch mixer 3.Produce the quick lime raw material of calcium carbide
Minus mesh calcium lime powder 2, while being transported to batch mixer 3, after two kinds of materials are sufficiently mixed according to a certain percentage, be transported to high pressure
Ball press 4 is pressed into oval spherical pelletizing 5, reaches certain crushing strength, compression strength is more than 392N, then is transported to furnace of calcium carbide
As raw material, the recycling of purification ash, calcium lime powder is realized.
（1）The a large amount of high-temperature furnace gas that will produce in closed calcium carbide furnace production process, furnace gas yield are 400Nm3/ t electricity
Stone, temperature are generally 400 ~ 900 DEG C, and dust content is about 50 ~ 150g/Nm3, furnace gas disengages from furnace of calcium carbide boiler face, passes through water
Cold net gas flue carries out entering flue gas cleaning device after tentatively cooling down.Furnace gas is pumped into settler, air cooler successively.In settler
It is removed containing 40 ~ 50% large dust particle in furnace gas, after air cooler carries out cooling dedusting, is sent into bag filter and carries out
Essence filtering, dust content≤30mg/m3Clean furnace gas be sent to limekiln as fuel or chemical plant installations raw material.By sedimentation
The solid dust purification ash that device, air cooler and bag filter are collected, purification ash cellar is transported to by chain scraper machine.Purification ash
From purification ash cellar by N2Airflow line is transported to batch mixer.
（2）Calcium lime powder is from the quick lime raw material for producing calcium carbide, by the screenings that vibrating screen sieves, granularity<
5mm.Calcium lime powder is stored in its feed bin, is pipelined to batch mixer.Purification ash and calcium lime powder are pressed in batch mixer
0 ~ 70% ratio that total mixture weight is accounted for according to purification ash is sufficiently mixed.According to the function of batch mixer using interval or even
Continuous baking material mode.
（3）Mixture is from batch mixer through pipeline to high-pressure ball press.Mixture is pressed into ellipse with high-pressure ball press
Shape pelletizing.Compression strength is more than 392N.
（4）The pelletizing suppressed is delivered to its feed bin through belt conveyor.According to the institute for purifying ash, calcium lime powder in pelletizing
Accounting example according to production carbide raw material proportioning, then adds with a certain proportion of raw material of wood-charcoal, quick lime, send to furnace of calcium carbide and smelt production electricity
Stone.
（Four）Description of the drawings
Fig. 1 is the process flow diagram of the grey mix and convert calcium lime powder pressure ball molding of present invention production calcium carbide furnace of calcium carbide purification.
In figure：1. 4. high-pressure ball press of grey 2. calcium lime powder, 3. batch mixer of purification, 5. pelletizing
（Five）Specific implementation mode
With the content that the present invention will be described in detail of case study on implementation 1.
Case study on implementation 1：It produces calcium carbide furnace of calcium carbide and purifies grey mix and convert calcium lime powder pressure ball molding technique
1. a large amount of high-temperature furnace gas generated in closed calcium carbide furnace production process, furnace gas yield is 400Nm3/ t calcium carbides, temperature
Generally 400 ~ 900 DEG C of degree, dust content is about 50 ~ 150g/Nm3, furnace gas disengages from furnace of calcium carbide boiler face, passes through the net gas cigarette of water cooling
Road carries out entering flue gas cleaning device after tentatively cooling down.Furnace gas is pumped into settler, air cooler successively.Contain in furnace gas in settler
There is 40 ~ 50% large dust particle to be removed, after air cooler carries out cooling dedusting, be sent into bag filter and carry out smart filtering,
Dust content≤30mg/m3Clean furnace gas be sent to limekiln as fuel or chemical plant installations raw material.By settler, air-cooled
The solid dust that device and bag filter are collected（Purification ash）, purification ash cellar is transported to by chain scraper machine.Purification is grey from net
Ashing storehouse is by N2Airflow line is transported to batch mixer.
The grey main physical and chemical of furnace of calcium carbide purification is shown in Table 1.
The grey main physical and chemical of 1 furnace of calcium carbide of table purification
| Project | Unit | Numerical value | Remarks |
| Density | kg/m3 | 300 | |
| Particle diameter distribution | μm | ||
| 0-10 | 72.6 | ||
| 10~20 | 18.4 | ||
| 20~50 | 7.4 | ||
| >50 | 1.6 | ||
| Composition | |||
| CaO | m% | 48.51 | That is quick lime |
| MgO | m% | 23.88 | |
| C | m% | 35.21 | That is raw material of wood-charcoal |
| Moisture | m% | 0.21 |
（2）Calcium lime powder is from the quick lime raw material for producing calcium carbide, by the screenings that vibrating screen sieves, granularity<5mm.It is raw
Pulverized limestone is stored in its high hopper, and batch mixer is pipelined to by gravity.Batch mixer is to purification ash and quick lime
Powder carries out Weighing, and operation is automatically controlled using PLC.In batch mixer, the 0 ~ 70% of total mixture weight is accounted for according to purification ash
Ratio be sufficiently mixed.According to the function of batch mixer using intermittently or serially baking material mode.
（3）Mixture exports from batch mixer and is delivered to high-pressure ball press through spiral pipeline conveyer.Mixture high pressure pressure
Ball machine is pressed into oval pelletizing.Pelletizing compression strength is more than 392N.
（4）The batch mixing pelletizing suppressed is delivered to its feed bin through belt conveyor.According to purification ash, calcium lime powder in pelletizing
Proportion then add with a certain proportion of raw material of wood-charcoal, quick lime according to production carbide raw material proportioning, send to furnace of calcium carbide to smelt and give birth to
Produce electricity stone.
Claims (4)
1. a kind of method producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification, which is characterized in that including with
Lower step：In the purifying and dedusting ash 1 that calcium carbide furnace gas device is collected, it is transported to batch mixer 3, the quick lime for producing calcium carbide is former
The minus mesh calcium lime powder 2 of material, while it being transported to batch mixer 3, after two kinds of materials are sufficiently mixed according to a certain percentage, it is transported to height
Ball press 4 is pressed, oval spherical pelletizing 5 is pressed into, reaches certain crushing strength, then is transported to furnace of calcium carbide as raw material, is realized net
Ashing, the recycling of calcium lime powder.
2. a kind of side producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification described in accordance with the claim 1
Method, which is characterized in that the ratio of purifying and dedusting 1 mix and convert calcium lime powder 2 of ash is the mixture total weight that purifying and dedusting ash 1 accounts for 0 ~ 70%
Amount adjusts mix and convert ratio according to factors such as purifying and dedusting ash yield, calcium lime powder yield and pelletizing crushing strengths, and this method is with life
Pulverized limestone ontology is binder, does not add the third any additive.
3. a kind of side producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification described in accordance with the claim 1
Method, which is characterized in that it is waterproof and dampproof that furnace of calcium carbide purifies ash, calcium lime powder, pelletizing storage environment；Furnace of calcium carbide purification ash uses pipeline
N2Air-flow conveys；The batch mixing pelletizing of compacting is aqueous≤and 1%, it can need not be dried, be calcined directly as raw material of calcium carbide furnace.
4. a kind of side producing the grey mix and convert calcium lime powder pressure ball molding of calcium carbide furnace of calcium carbide purification described in accordance with the claim 1
Method, which is characterized in that improve pressure ball utilization rate of equipment and installations and operating efficiency, ash, raw stone can be purified in pressure ball raw material calcium carbide stove
It is mixed into coke powder in ashes, and smelts the raw material of wood-charcoal raw material of calcium carbide, common pressure ball molding.
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Cited By (4)
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| CN109970063A (en) * | 2019-03-28 | 2019-07-05 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | A kind of method producing calcium carbide and feed proportioning system |
| CN111515219A (en) * | 2020-04-07 | 2020-08-11 | 青海盐湖工业股份有限公司 | High-temperature purification ash treatment system and method for calcium carbide furnace and material block |
| CN112499632A (en) * | 2020-11-25 | 2021-03-16 | 江苏中圣园科技股份有限公司 | Calcium oxide powder circulating ball pressing system and process for carbide slag calcination |
| CN113105131A (en) * | 2021-03-22 | 2021-07-13 | 新疆至臻化工工程研究中心有限公司 | Method for purifying ash by comprehensively utilizing calcium carbide |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109970063A (en) * | 2019-03-28 | 2019-07-05 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | A kind of method producing calcium carbide and feed proportioning system |
| CN111515219A (en) * | 2020-04-07 | 2020-08-11 | 青海盐湖工业股份有限公司 | High-temperature purification ash treatment system and method for calcium carbide furnace and material block |
| CN111515219B (en) * | 2020-04-07 | 2021-11-16 | 青海盐湖工业股份有限公司 | High-temperature purification ash treatment system and method for calcium carbide furnace and material block |
| CN112499632A (en) * | 2020-11-25 | 2021-03-16 | 江苏中圣园科技股份有限公司 | Calcium oxide powder circulating ball pressing system and process for carbide slag calcination |
| CN112499632B (en) * | 2020-11-25 | 2024-05-10 | 江苏中圣园科技股份有限公司 | Calcium oxide powder circulating ball pressing system and process for carbide slag calcination |
| CN113105131A (en) * | 2021-03-22 | 2021-07-13 | 新疆至臻化工工程研究中心有限公司 | Method for purifying ash by comprehensively utilizing calcium carbide |
| CN113105131B (en) * | 2021-03-22 | 2023-06-06 | 新疆至臻化工工程研究中心有限公司 | Method for purifying ash by comprehensively utilizing calcium carbide |
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