CN109054685A - Coke powder adhesive, suitable for the focal sphere and preparation method thereof of closed calcium carbide furnace production, closed calcium carbide furnace calcium carbide production method - Google Patents
Coke powder adhesive, suitable for the focal sphere and preparation method thereof of closed calcium carbide furnace production, closed calcium carbide furnace calcium carbide production method Download PDFInfo
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- CN109054685A CN109054685A CN201811067463.4A CN201811067463A CN109054685A CN 109054685 A CN109054685 A CN 109054685A CN 201811067463 A CN201811067463 A CN 201811067463A CN 109054685 A CN109054685 A CN 109054685A
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- calcium carbide
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J103/00—Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
- C09J103/02—Starch; Degradation products thereof, e.g. dextrin
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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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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Abstract
The invention discloses a kind of coke powder adhesives, and by cornstarch, closed electrode paste, petroleum coke, coal tar, carburant forms by a certain percentage.The invention also discloses the methods for preparing focal sphere with the coke powder adhesive, comprising the following steps: a, coke powder and coke powder adhesive feed intake in proportion；B, it is heated up to Con trolling index；C, compression moulding；D, it dries.The invention also discloses a kind of closed calcium carbide furnace calcium carbide production methods, it is characterised in that mixes focal sphere of the invention, doping level accounts for the 50~60% of furnace carbon materials gross mass.The invention has the advantages that 1) influence very little or none influence of the focal sphere of preparation to the fixed carbon, volatile matter, ash content that process raw material, and granularity, cold strength, calorific intensity, the water-resistance of gained focal sphere can fully meet the needs of calcium carbide production, focal sphere gross mass accounts for the highly doped of 50% or more of furnace carbon materials gross mass and uses ratio in realization calcium carbide production；2) focal sphere pressing process is simple, and ball processed is at low cost.
Description
Technical field
The present invention relates to a kind of calcium carbide production technology, the recoverying and utilizing method of coke powder in especially a kind of calcium carbide production.
Background technique
The main equipment of calcium carbide production is furnace of calcium carbide, and closed calcium carbide furnace refers to the electrochemical reaction of calcium carbide production closed
It is carried out in container, external air not can enter in reactor, and the production process of calcium carbide is by coke and lime stone by certain ratio
In example addition furnace, the reaction after generating electric heating that is powered by three-phase electrode generates carbonization calcium product.
Coke is the important source material of calcium carbide production, reducing agent is used as in furnace charge, the granularity of coke is to calcium carbide Influence of production
Very big, granularity is generally advisable with 15~40mm.But in Coke Transport, storage and use process, it may appear that dusting is formed certain
The coke powder of amount, abbreviation coke powder.The granularity of coke powder is usually less than 5mm, and quality typically constitutes from the 10~20% of total amount.Due to coke
The requirement of calcium carbide production technology is all not achieved in the granularity of powder, intensity, hardness etc., thus can only be used as electric coal or make other people
With even abandoning, this does not fully demonstrate its intrinsic value not only, also will cause environmental pollution.In the energy sharply nervous the present
It, the even more serious wasting of resources.If focal sphere these coke powders, which can be made, is reused for calcium carbide production, can undoubtedly save into
This, economizes on resources.
Calcium carbide production has very strict requirement to every physicochemical property of raw coke, has many enterprises before this to improve
The utility value of screenings, trial will recycle after coke powder and adhesive mixing pressure ball, and having regeneration focal sphere at present can be used for Huang
Successful registrations of phosphorus production, but be all not achieved calcium carbide production requirement because of focal sphere index, it is especially hot under thermal stability with
Compression strength is unable to satisfy the requirement of calcium carbide production technology, too big to calcium carbide Influence of production, or mixes the too low no reality of ratio
Economic value and abandon.
Summary of the invention
To can be used for calcium carbide production after realization coke powder pressure ball, in recent years, how we are breaking through coke powder pressure ball technology always
It investigated, researched and developed, being tracked, being tested, being produced in terms of bottleneck, successfully developing coke powder pressure ball adhesive specially finally.
The technical scheme adopted by the invention is that: coke powder adhesive is grouped as by each group of following mass percentage content:
Cornstarch 56~64%, closed electrode paste 18~22%, petroleum coke 8~12%, coal tar 4~6%, carburant 4~6%.
It has been recognised by the inventors that the maximum technical bottleneck that coke powder pelletizing recycles is both to have can guarantee currently without a kind of adhesive
Enough adhesive strengths under required focal sphere size, and focal sphere can simultaneously had required for meeting calcium carbide production technology
Thermal stability, fixed carbon, suitable volatile matter, enough calorific intensitys, cold strength and water-resistance.It simply says, using any viscous
Mixture all can fixed carbon, volatile matter, ash content to coke powder adversely affect, but if be added without enough adhesives again nothing
Method guarantees enough adhesive strengths, so that the calorific intensity, cold strength and water-resistance to focal sphere adversely affect.This makes this
Research enters predicament.
Earlier innovation people has done many researchs to this, is included in inorganic bond, polymer binder, resinae adhesive
On the basis of improve, but finally all end in failure, main cause is that the addition of new component leads to intrinsic viscous of adhesive
Conjunction property significantly reduces.Final inventor determines the ingredient based on cornstarch, and finds to cooperate a certain proportion of closed electrode
Paste, petroleum coke, coal tar, carburant can either guarantee that the bond properties of adhesive is not significantly affected, and be able to maintain that coke
Thermal stability, the fixed carbon of ball stablize volatile matter and improve calorific intensity.It is demonstrated experimentally that though product focal sphere cannot still substitute completely
Coke, but realized that focal sphere gross mass accounts for the highly doped of 50% or more of furnace carbon materials gross mass and will not be produced to calcium carbide under ratio
It impacts, this has been the very big technological progress of this field.
The experiment proved that can reach following technical indicator using the focal sphere of coke powder compressed with adhesive of the invention:
1, granularity: 15~40mm；
2, fixed carbon: decline 0.5~1% on the basis of processing raw material coke powder；
3, volatile matter: rise 0.5~1% on the basis of processing raw material coke powder；
4, ash content: relative to processing raw material, coke powder not will increase；
5, moisture: < 1.5%；
6, cold strength: > 150kg；
7, calorific intensity (900 degree constant temperature 1 hour after compression strength): > 15kg and mistake, not damaged is not burnt；
8, it water-resistance: impregnates 10 hours do not dissipate in water；
As it can be seen that the focal sphere that is prepared using coke powder adhesive of the invention is to the fixed carbon, volatile matter, ash content to process raw material
Very little or none influence is influenced, and the granularity of gained focal sphere, cold strength, calorific intensity, water-resistance can fully meet calcium carbide life
The needs of production.
More preferably, coke powder adhesive of the invention can be grouped as by each group of following mass percentage content: cornstarch
60%, closed electrode paste 20%, petroleum coke 10%, coal tar 5%, carburant 5%.
In addition, the present invention also provides a kind of preparation method of focal sphere suitable for closed calcium carbide furnace production, including it is following
Step:
A, coke powder and coke powder adhesive described in claim 1 are fed intake in proportion, obtains mixture；
B, mixture is sufficiently stirred and is humidified and be heated up to Con trolling index, obtain material to be pressed；
C, will material ball press compression moulding be pressed, obtain molding mass；
D, it is dried into moulding mixture, obtains focal sphere.
Applicant has explained in the background technology, the coke that the coke powder the refers to granularity that dusting is formed in use
Coke powder less than 5mm, it is readily appreciated that, the use process refers to any in coke use process can result in coke
The case where dusting, production process, transportational process, coke including coke are sent into screenings, drying course before furnace of calcium carbide use
The dedusting ash etc. of generation.
As a further improvement of the present invention, in step A coke powder and coke powder adhesive according to mass ratio 100:3~3.5
Ratio feeds intake.The use ratio of coke powder and coke powder adhesive is an important technical parameter, and adhesive added major general and leads
Cause bond effect, cold strength, calorific intensity and the water-resistance of focal sphere that technique requirement is not achieved；And it will lead to using excessive adhesive
The fixed carbon content decline of focal sphere, volatile matter rise.It therefore should be under the premise of guaranteeing the bond effect of focal sphere as far as possible using few
Coke powder adhesive, this point be skilled artisans appreciate that, by routine experiment i.e. can determine adhesive use
Ratio.To make technical staff include that non-those skilled in the art also clearly understood that and implement, inventor provide by reality
Test determining above-mentioned coke powder adhesive use ratio.
As a further improvement of the present invention, in step B according to mixture and water quality than the ratio for 100:15~20
Water is added to carry out humidification process.The purpose for adding water is to form and demould in pressing process: adding dilutional hyponatremia or very few equal
Can have a great impact to molding, demoulding.
As a further improvement of the present invention, temperature of charge to be pressed is 65~80 DEG C in step B, it is demonstrated experimentally that pressure ball temperature
Degree has large effect to final focal sphere performance, and reason may be closed due to containing in coke powder binder materials of the invention
Electrode paste and cornstarch, heat treatment to the temperature give the section for being scheduled on the softening point of electrode paste, while 65~80 DEG C of sections
It is modification of corn starch optimum temperature range.
As a further improvement of the present invention, the compacting pressure in step C is 0.3~0.5MPa.
As a further improvement of the present invention, in step D gained focal sphere biodiversity degree < 1.5%.
As a further improvement of the present invention, the granularity of gained focal sphere is 15~40mm in step D.
The focal sphere being prepared using method of the invention is the focal sphere for being suitable for closed calcium carbide furnace production.
The present invention also provides a kind of closed calcium carbide furnace calcium carbide production method, in the closed calcium carbide furnace calcium carbide production method
Upper furnace carbon materials as reducing agent include the focal sphere for being suitable for closed calcium carbide furnace production of the invention, described to be suitable for closed calcium carbide
The focal sphere gross mass of furnace production accounts for the 50~60% of furnace carbon materials gross mass.That is the achievable focal sphere gross mass of the present invention accounts for furnace carbon
50~60% ratio of material gross mass is added use, and calcium carbide production is not caused to be therefore affected.
The beneficial effects of the present invention are: 1) fixation of the focal sphere prepared using coke powder adhesive of the invention to processing raw material
The very little or none influence of influence of carbon, volatile matter, ash content, and the granularity of gained focal sphere, cold strength, calorific intensity, water-resistance can
The needs of calcium carbide production are enough fully met, realize that focal sphere gross mass accounts for furnace carbon materials gross mass in the production of closed calcium carbide furnace calcium carbide
50% or more it is highly doped under ratio will not therefore calcium carbide production process is impacted；2) focal sphere pressing process is simple, ball processed
It is at low cost.
Detailed description of the invention
Fig. 1 is the focal sphere that closed calcium carbide furnace is taken off out when leak is overhauled in furnace, and focal sphere shape is intact, wherein there is portion
Dividing shot-like particle is the coke after burning.
Fig. 2 is compression strength of the focal sphere made from embodiment one in Muffle furnace after 900 degree of constant temperature one hour.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment one:
Focal sphere is prepared in accordance with the following methods:
(1) coke powder and coke powder adhesive are fed intake according to the ratio of 100:3, obtains mixture；The coke powder property: ash content
12.4%, volatile matter 3.6%, fixed carbon 84%, average particle size 3.7mm；The coke powder adhesive is composed of the following components: corn
Starch 60%, closed electrode paste 20%, petroleum coke 10%, coal tar 5%, carburant 5%.
(2) mixture is sufficiently stirred using vertical mixer, adds water to mixing into mixture while stirring
Material carries out humidification process, and mixture and water quality ratio are 100:16, and the material after humidification is then warming up to 80 DEG C, is obtained wait press
Material.
(3) will material ball press compression moulding be pressed, compacting pressure be 0.4MPa, obtain molding mass, the molding mass
Granularity be about 34mm.
(4) it uses industrial furnace tail hot gas be dried to water content to molding mass as 1.0%, obtains focal sphere.To focal sphere
Fixed carbon, volatile matter, the properties such as ash content are detected, and testing result is shown in Table 1.
(5) by closed calcium carbide furnace (40500KVA) upper end pipeline by upper furnace raw material of wood-charcoal be added furnace in, the upper furnace raw material of wood-charcoal by
Following components composition: coke (ash content 12.4%, volatile matter 3.6%, fixed carbon 84%, average particle size 26mm) 45%, step (4)
The focal sphere 55% being prepared；It is heated to 2000 DEG C in closed electric furnace, is reacted according to following formula and generates calcium carbide: GaO+3C → CaC2
+CO；The calcium carbide melted after furnace bottom taking-up, through cooling, it is broken after obtain calcium carbide product.Continuous production January, to calcium carbide
The condition of production is counted, and the results are shown in Table 2.
Embodiment two:
Focal sphere is prepared in accordance with the following methods:
(1) coke powder and coke powder adhesive are fed intake according to the ratio of 100:3.3, obtains mixture；The coke powder property: ash
Point 12.4%, volatile matter 3.6%, fixed carbon 84%, average particle size 3.7mm；The coke powder adhesive is composed of the following components: beautiful
Rice starch 64%, closed electrode paste 18%, petroleum coke 9%, coal tar 4%, carburant 5%.
(2) mixture is sufficiently stirred using vertical mixer, adds water to mixing into mixture while stirring
Material carries out humidification process, and mixture and water quality ratio are 100:20, and the material after humidification is then warming up to 65 DEG C, is obtained wait press
Material.
(3) will material ball press compression moulding be pressed, compacting pressure be 0.5MPa, obtain molding mass, the molding mass
Granularity be about 40mm.
(4) it uses industrial furnace tail hot gas be dried to water content to molding mass as 1.5%, obtains focal sphere.To focal sphere
Fixed carbon, volatile matter, the properties such as ash content are detected, and testing result is shown in Table 1.
(5) by closed calcium carbide furnace (40500KVA) upper end pipeline by upper furnace raw material of wood-charcoal be added furnace in, the upper furnace raw material of wood-charcoal by
Following components composition: coke (ash content 12.4%, volatile matter 3.6%, fixed carbon 84%, average particle size 26mm) 50%, step (4)
The focal sphere 50% being prepared；It is heated to 2000 DEG C in closed electric furnace, is reacted according to following formula and generates calcium carbide: GaO+3C → CaC2
+CO；The calcium carbide melted after furnace bottom taking-up, through cooling, it is broken after obtain calcium carbide product.Continuous production January, to calcium carbide
The condition of production is counted, and the results are shown in Table 2.
Embodiment three:
Focal sphere is prepared in accordance with the following methods:
(2) coke powder and coke powder adhesive are fed intake according to the ratio of 100:3.5, obtains mixture；The coke powder property: ash
Point 12.4%, volatile matter 3.6%, fixed carbon 84%, average particle size 3.7mm；The coke powder adhesive is composed of the following components: beautiful
Rice starch 56%, closed electrode paste 22%, petroleum coke 10%, coal tar 6%, carburant 6%.
(2) mixture is sufficiently stirred using vertical mixer, adds water to mixing into mixture while stirring
Material carries out humidification process, and mixture and water quality ratio are 100:15, and the material after humidification is then warming up to 70 DEG C, is obtained wait press
Material.
(3) will material ball press compression moulding be pressed, compacting pressure be 0.3MPa, obtain molding mass, the molding mass
Granularity be about 18mm.
(4) it uses industrial furnace tail hot gas be dried to water content to molding mass as 1.5%, obtains focal sphere.To focal sphere
Fixed carbon, volatile matter, the properties such as ash content are detected, and testing result is shown in Table 1.
(5) by closed calcium carbide furnace (40500KVA) upper end pipeline by upper furnace raw material of wood-charcoal be added furnace in, the upper furnace raw material of wood-charcoal by
Following components composition: coke (ash content 12.4%, volatile matter 3.6%, fixed carbon 84%, average particle size 26mm) 48%, step (4)
The focal sphere 52% being prepared；It is heated to 2000 DEG C in closed electric furnace, is reacted according to following formula and generates calcium carbide: GaO+3C → CaC2
+CO；The calcium carbide melted after furnace bottom taking-up, through cooling, it is broken after obtain calcium carbide product.Continuous production January, to calcium carbide
The condition of production is counted, and the results are shown in Table 2.
Comparative example one:
Calcium carbide is produced using the technique and equipment being the same as example 1, difference is that furnace raw material of wood-charcoal all uses coke
(ash content 12.4%, volatile matter 3.6%, fixed carbon 84%, average particle size 26mm), continuous production January, to the calcium carbide condition of production
It is counted, the results are shown in Table 2.
Cost and economic benefit:
1, pressure ball cost: 420 yuan/ton.Wherein: 54.4 yuan/ton of VAT invoice, 220 yuan/ton of dedicated coke powder adhesive,
33 yuan/ton of equipment depreciation in 5 years；30 yuan/ton of labour cost；15 yuan/ton of producing cost；20 yuan/ton of the cost of repairs；Profit 47.6
Yuan/ton.
2, scheme income: assuming that coke price is 600 yuan/ton, outer 150 yuan/ton of lattice of the price of coke powder.Due to coke powder moisture >
15%, and the moisture < 1.5% of focal sphere, coke screenings averagely reach 15%, focal sphere screenings is almost nil, therefore real price
Difference can be considered 600*1.28-150=618 yuan/ton, subtract 420 yuan/ton of focal sphere production cost, 198 yuan of owner's income per ton, if
1 year 120000 tons of pressure ball (if internal coke powder amount is inadequate, buyable coke powder pressure ball.Focal sphere doping level can reach furnace carbon materials amount
50~60%), 23,760,000 yuan of annual extra earning.Benefit is more considerable if drying kiln dedusting ash is used again.Table 1: focal sphere property
Detect table
| Fixed carbon | Volatile matter | Ash content | Cold strength/kg | Calorific intensity/kg | Water-resistance/h does not dissipate | |
| Embodiment one | 83.4% | 4.1% | 12.5% | 312 | 26.7 | 16 |
| Embodiment two | 83.1% | 4.5% | 12.4% | 284 | 24.8 | 13 |
| Embodiment three | 83.3% | 4.2% | 12.5% | 324 | 25.6 | 16 |
Table 2: the calcium carbide condition of production
| Yield after mark | Electric unit consumption after mark | Operation rate | |
| Embodiment one | 6814.45 | 3120 | 98.45% |
| Embodiment two | 6731.66 | 3187 | 98.26% |
| Embodiment three | 6781.59 | 3115 | 97.53% |
| Comparative example one | 6846.32 | 3057 | 98.53% |
Claims (10)
1. coke powder adhesive is grouped as by each group of following mass percentage content: cornstarch 56~64%, closed electrode paste
18~22%, petroleum coke 8~12%, coal tar 4~6%, carburant 4~6%.
2. coke powder adhesive according to claim 1, is grouped as: cornstarch by each group of following mass percentage content
60%, closed electrode paste 20%, petroleum coke 10%, coal tar 5%, carburant 5%.
3. being suitable for the preparation method of the focal sphere of closed calcium carbide furnace production, comprising the following steps:
A, the ratio of coke powder and coke powder adhesive 100:3~3.5 in mass ratio described in claim 1 is fed intake, is mixed
Material；
B, mixture is sufficiently stirred and is humidified and be heated up to Con trolling index, obtain material to be pressed；
C, will material ball press compression moulding be pressed, obtain molding mass；
D, it is dried into moulding mixture, obtains focal sphere.
4. the preparation method of the focal sphere according to claim 3 suitable for closed calcium carbide furnace production, it is characterised in that: step
Water is added to carry out humidification process than the ratio for 100:15~20 according to mixture and water quality in B.
5. the preparation method of the focal sphere according to claim 3 suitable for closed calcium carbide furnace production, it is characterised in that: step
Temperature of charge to be pressed is 65~80 DEG C in B.
6. the preparation method of the focal sphere according to claim 3 suitable for closed calcium carbide furnace production, it is characterised in that: step
Compacting pressure in C is 0.3~0.5MPa.
7. the preparation method of the focal sphere according to claim 3 suitable for closed calcium carbide furnace production, it is characterised in that: step
The biodiversity degree < 1.5% of gained focal sphere in D.
8. the preparation method of the focal sphere according to claim 3 suitable for closed calcium carbide furnace production, it is characterised in that: step
The granularity of gained focal sphere is 15~40mm in D.
9. the focal sphere for being suitable for closed calcium carbide furnace production that the method as described in claim 3~8 is prepared.
10. closed calcium carbide furnace calcium carbide production method, it is characterised in that: be used as reduction in the closed calcium carbide furnace calcium carbide production method
The carbon materials of agent include the focal sphere as claimed in claim 9 suitable for closed calcium carbide furnace production, described to be suitable for closed calcium carbide furnace life
The focal sphere gross mass of production accounts for the 50~60% of carbon materials gross mass.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811067463.4A CN109054685B (en) | 2018-09-13 | 2018-09-13 | Coke powder adhesive, coke balls suitable for production of closed calcium carbide furnace and preparation method thereof, and production method of calcium carbide of closed calcium carbide furnace |
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|---|---|---|---|
| CN201811067463.4A CN109054685B (en) | 2018-09-13 | 2018-09-13 | Coke powder adhesive, coke balls suitable for production of closed calcium carbide furnace and preparation method thereof, and production method of calcium carbide of closed calcium carbide furnace |
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| CN109054685A true CN109054685A (en) | 2018-12-21 |
| CN109054685B CN109054685B (en) | 2020-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363599A (en) * | 2020-04-15 | 2020-07-03 | 宁夏中润工贸有限公司 | Novel formed coke adhesive and method for preparing formed coke by using same |
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2018
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| CN101275091A (en) * | 2007-03-27 | 2008-10-01 | 上海宝田新型建材有限公司 | Molded coal for smelting reduction iron-smelting process and manufacturing method thereof |
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| CN105154621A (en) * | 2014-06-03 | 2015-12-16 | 本钢板材股份有限公司 | Preparation method of carburant for steel-making |
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|---|---|---|---|---|
| CN111363599A (en) * | 2020-04-15 | 2020-07-03 | 宁夏中润工贸有限公司 | Novel formed coke adhesive and method for preparing formed coke by using same |
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