CN106753654A - Improve high-temperature agglomerant of the jet coal with quick lime mixing pellet strength and its application - Google Patents
Improve high-temperature agglomerant of the jet coal with quick lime mixing pellet strength and its application Download PDFInfo
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- CN106753654A CN106753654A CN201611056094.XA CN201611056094A CN106753654A CN 106753654 A CN106753654 A CN 106753654A CN 201611056094 A CN201611056094 A CN 201611056094A CN 106753654 A CN106753654 A CN 106753654A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
- C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders
- C10L5/143—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders with lignin-containing products
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Abstract
The invention discloses raising high-temperature agglomerant of the jet coal with quick lime mixing pellet strength and its application.The preparation method of the high-temperature agglomerant includes：(1) binding coal is crushed and obtains caking property coal dust；(2) to adding CS in caking property coal dust2/ NMP mixed solvents are extracted；(3) to asphalt powder and crosslinking agent is added in extract, it is uniformly mixed so as to obtain mixture；(4) mixture is reacted, the mixture after the completion of reaction is distilled, obtained residue；(5) residue washed, dried, obtained final product.Method the present invention further discloses jet coal and intensity after the pyrolysis of quick lime mixing pelletizing is improved using the high-temperature agglomerant, including：Jet coal, quick lime and high-temperature agglomerant are crushed respectively, then mixing, shaping obtains pelletizing, and pelletizing after pelletizing is pyrolyzed is obtained final product.High-temperature agglomerant prepared by the inventive method can effectively improve the intensity after jet coal is pyrolyzed with quick lime pelletizing.
Description
Technical field
The present invention relates to a kind of preparation method of high-temperature agglomerant, further relate to a kind of raising using the high-temperature agglomerant and grow
Flame coal and the method for intensity after the pyrolysis of quick lime mixing pelletizing, belong to binding agent field.
Background technology
Jet coal is a kind of minimum bituminous coal of degree of metamorphism, is the minimus bituminous coal that degree of coalification is only above lignite, from
No adhesion has to weak caking property.The caking property of coal refers to that bituminous coal is organic in coal when being heated under conditions of completely cutting off air
Matter macromolecular is thermally decomposed, and forms the mixture of gas, liquid, solid three-phase coexistence, referred to as gel.Gel bond itself or it is outer
Come the ability of inert substance, the referred to as caking property of coal.The coal strong for caking property, liquid product is more in gel and mobility
Suitably, can preferably be filled with solid particle gap has certain viscosity again, now, gel poor air permeability, the gas in gel
State product can not be separated out freely, therefore swelling occur.As temperature is raised, the liquid product in gel produces further
Decompose, a part of thermal decomposition product continues to separate out in gaseous state；Another part then combines together with solid granulates, thermal polycondensation and solidify,
Generate the semicoke of high intensity.For no adhesion or weak caking coal, the liquid product in gel seldom, far can not fill
Full solid granulates gap, or even solid granulates surface can not be infiltrated, then gaseous products are freely separated out, each self-dispersing of solid particle,
Half char strength of generation is very poor.
At present, for the jet coal for having no caking property, its shaping pelletizing with quick lime after pyrolysis, pelletizing
Compression strength it is very poor.The reaction of fierceness can occur after meeting water due to quick lime, calcium hydroxide is generated, it is therefore desirable to add water
Binding agent is not suitable for the shaping of jet coal and quick lime, and for the organic binder bond that need not be added water, it is resistance to
Temperature is too low, it is impossible to reach 700 DEG C~900 DEG C of high temperature, and the cost of binding agent is too high.It would therefore be highly desirable to develop a kind of new
The high-temperature agglomerant of type, to effectively improve the intensity after jet coal is pyrolyzed with quick lime pelletizing.
The content of the invention
First technical problem to be solved by this invention is to provide a kind of preparation method of high-temperature agglomerant.
Second technical problem to be solved by this invention is to provide a kind of using high-temperature agglomerant raising jet coal
With the method for intensity after the pyrolysis of quick lime mixing pelletizing.
In order to solve the above technical problems, the technical solution used in the present invention is：
The present invention discloses a kind of preparation method of high-temperature agglomerant first, comprises the following steps：(1) by caking property coal dust
It is broken, obtain caking property coal dust；(2) to adding CS in caking property coal dust2/ NMP mixed solvents are extracted, and are then centrifuged for separating,
Obtain extract；(3) it is well mixed to obtain mixture to asphalt powder and crosslinking agent is added in extract；(4) mixture is carried out
Reaction, distills to the mixture after the completion of reaction, evaporates CS2/ NMP mixed solvents, obtain residue；(5) to residual
Thing is washed, dried, and obtains high-temperature agglomerant.
Wherein, step (1) described binding coal is coal of the caking index more than 50 or thickness of colloidal matter layer Y more than 10.
Granularity≤75 μm of the caking property coal dust.
Step (2) described CS2In/NMP mixed solvents, CS2It is 1 with the volume ratio of NMP：0.5-1；The binding coal with
CS2The weight ratio of/NMP mixed solvents is 1：10-20.Step (2) can in batches to adding CS in caking property coal dust2/ NMP is mixed
Bonding solvent is extracted repeatedly, the extract in extract be mainly containing aliphatic structure and containing 2~3 phenol of aromatic ring,
The material of alcohol, ethers structure.CS of the present invention2(carbon disulfide) and NMP (1-METHYLPYRROLIDONE) are commercially available.
Step (3) asphalt powder is with the addition of crosslinking agent：According to mass ratio meter, binding coal：Asphalt powder：Crosslinking
Agent=1：0.2-0.5：0.005-0.01.
The crosslinking agent is organic peroxide.Preferably benzoyl peroxide or cumyl peroxide.
Granularity≤75 μm of the asphalt powder.Preferably, the pitch is soft pitch, 70 DEG C of its softening point ＜.
The condition of step (4) described reaction includes：Temperature be 100-200 DEG C, pressure be 0.1-0.3MPa under, react 3-5
Hour.
Step (5) washing is to be washed with water；The drying is drying to moisture≤5% (quality percentage
Than).
The dark brown complex mixture that pitch is made up of the hydrocarbon and its non metallic derivatives of different molecular weight,
It is one kind of high viscosity organic fluid, dissolves in carbon disulfide, pitch can be divided into saturation point, fragrance point, resin and asphalt
Four components.Contain polar aromatics in colloid, chemical stability is poor.By adding crosslinking agent, make in extract containing 2~
Polar aromatics in fragrance point and colloid in 3 phenol of aromatic ring, alcohol, the materials and pitch of ethers structure etc. crosslink anti-
Should, form a kind of moderate high-temperature agglomerant of molecular weight.The binding agent can produce gel in heating process such that it is able to have
Effect improves jet coal and the intensity after the pyrolysis of quick lime mixing pelletizing, it is met the requirement smelted into furnace of calcium carbide.
Jet coal and life are improved the present invention further discloses the high-temperature agglomerant prepared using the preparation method
The method of intensity, comprises the following steps after the pyrolysis of lime mixing pelletizing：(1) jet coal, quick lime and high-temperature agglomerant are distinguished
Crush, be then well mixed, obtain mixed material；(2) mixed material is molded, is obtained pelletizing；(3) pelletizing is carried out into heat
Solution, pelletizing after being pyrolyzed is obtained final product.
Wherein, step (1) is according to mass ratio meter, jet coal：Quick lime：High-temperature agglomerant=1：0.9-1.2：0.05-
0.15；It is described to crush to be crushed to granularity≤150 micron.The caking index of jet coal of the present invention is 0.
Step (2) described pelletizing is the oval pelletizing of diameter≤5cm.
The temperature of step (3) described pyrolysis is 700-900 DEG C, and the time of pyrolysis is 1-2 hours.
The present invention can use all kinds of mixing equipments in this area, such as batch mixer, for jet coal, quick lime and high temperature to be glued
Knot agent is well mixed.Described shaping can be molded using high-voltage double-roller forming machine, and the pyrolysis is carried out in pyrolysis oven.
The present invention is by jet coal, quick lime and adds pelletizing prepared by the high-temperature agglomerant and is pyrolyzed, and obtains high-strength
Pelletizing after the pyrolysis of degree, the compression strength of pelletizing is not less than 700-900N/ after pyrolysis, and heat endurance is not less than 90%.The heat
Pelletizing after solution can be sent directly into furnace of calcium carbide to be smelted, so as to obtain the high-quality calcium carbide that gas forming amount is not less than 290L/kg.
However, without high-temperature agglomerant of the present invention, being only pyrolyzed the pelletizing that jet coal and quick lime are mixed with, it is pyrolyzed
Less than 200N/, heat endurance is less than 40% to the compression strength of pelletizing, and its intensity cannot meet the requirement into furnace of calcium carbide afterwards.
Technical solution of the present invention compared with prior art, has the advantages that：
The present invention with binding coal as raw material, by adding CS2/ NMP organic solvents will contain 2~3 in binding coal
The phenol of aromatic ring, alcohol, the small molecular of ethers structure are extracted, by it with soft pitch powder in fragrance point and polar aromatics enter
Row cross-linking reaction, forms the moderate high-temperature agglomerant of molecular weight, and the binding agent mainly generates gel liquid phase in pyrolytic process,
Can be filled between solid granulates, and with the raising of pyrolysis temperature, thermal polycondensation reaction occur such that it is able to greatly improve
Intensity after the pyrolysis of jet coal and quick lime pelletizing.The wide material sources of binding coal of the present invention and soft pitch, it is with low cost.
Specific embodiment
Further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
It is apparent.It should be understood that the embodiment is only exemplary, any limitation is not constituted to the scope of the present invention.This area
Technical staff should be understood that without departing from the spirit and scope of the invention can to the details of technical solution of the present invention and
Form is modified or is replaced, but these modifications or replacement each fall within protection scope of the present invention.
Embodiment 1
To addition CS in caking property coal dust (granularity≤75 μm)2/ NMP mixed solvents (CS in mixed solvent2With the volume of NMP
Than being 1：0.5) extracted, wherein caking property coal dust and CS2The weight ratio of/NMP mixed solvents is 1：10, after centrifugation
To extract, then to asphalt powder is added in extract, (wherein pitch is soft pitch, and its softening point is less than 70 DEG C, asphalt powder
Granularity≤75 μm) and crosslinking agent (benzoyl peroxide), the addition of asphalt powder is 0.2 times of binding coal weight portion, is handed over
Join the addition of agent for 0.005 times of binding coal weight portion, be sufficiently mixed it is uniform, then in 100 DEG C of temperature, pressure 0.1MPa
Lower reaction 3 hours, (CS is evaporated by distillation2/ NMP mixed solvents) residue is obtained, residue is washed (with water pair
Residue carries out cyclic washing), drying and processing (by moisture control below 5%), obtain high-temperature agglomerant.
Jet coal (caking index is 0), quick lime and the high-temperature agglomerant (being crushed to granularity≤150 micron respectively) are pressed
According to 1:0.9:0.05 ratio (mass ratio) carries out mixed processing, obtains mixed material, and mixed material is entered with high-pressure ball press
Row forming processes, obtain the oval pelletizing of diameter no more than 5cm, and the compression strength of pelletizing is not less than 500N/, by the pelletizing
Being put into carries out pyrolysis processing in 700 DEG C of pyrolysis oven, 2 hours residence times, the pelletizing after being pyrolyzed, and pelletizing is anti-after pyrolysis
Compressive Strength is not less than 700N/, and heat endurance is not less than 90%, and the pelletizing is loaded smelt obtaining gas forming amount in furnace of calcium carbide
It is not less than the calcium carbide of 290L/kg.
Embodiment 2
To addition CS in caking property coal dust (granularity≤75 μm)2/ NMP mixed solvents (CS in mixed solvent2With the volume of NMP
Than being 1：1) extracted, wherein caking property coal dust and CS2The weight ratio of/NMP mixed solvents is 1：20, obtained after centrifugation
Extract, then to asphalt powder is added in extract, (wherein pitch is soft pitch, and its softening point is less than 70 DEG C, asphalt powder
Granularity≤75 μm) and crosslinking agent (cumyl peroxide), the addition of asphalt powder is 0.3 times of binding coal weight portion, is handed over
Join the addition of agent for 0.007 times of binding coal weight portion, be sufficiently mixed it is uniform, then in 150 DEG C of temperature, pressure 0.2MPa
Lower reaction 4 hours, (CS is evaporated by distillation2/ NMP mixed solvents) residue is obtained, residue is washed (with water pair
Residue carries out cyclic washing), drying and processing (by moisture control below 5%), obtain high-temperature agglomerant.
Jet coal (caking index is 0), quick lime and the high-temperature agglomerant (being crushed to granularity≤150 micron respectively) are pressed
According to 1:1.1:0.1 ratio (mass ratio) carries out mixed processing, obtains mixed material, and mixed material is carried out with high-pressure ball press
Forming processes, obtain the oval pelletizing of diameter no more than 5cm, and the compression strength of pelletizing is not less than 500N/, the pelletizing is put
Entering carries out pyrolysis processing in 800 DEG C of pyrolysis oven, 1.5 hours residence times, the pelletizing after being pyrolyzed, and pelletizing is anti-after pyrolysis
Compressive Strength is not less than 800N/, and heat endurance is not less than 90%, and the pelletizing is loaded smelt obtaining gas forming amount in furnace of calcium carbide
It is not less than the calcium carbide of 290L/kg.
Embodiment 3
To addition CS in caking property coal dust (granularity≤75 μm)2/ NMP mixed solvents (CS in mixed solvent2With the volume of NMP
Than being 1：0.8) extracted, wherein caking property coal dust and CS2The weight ratio of/NMP mixed solvents is 1：15, after centrifugation
To extract, then to asphalt powder is added in extract, (wherein pitch is soft pitch, and its softening point is less than 70 DEG C, asphalt powder
Granularity≤75 μm) and crosslinking agent (benzoyl peroxide), the addition of asphalt powder is 0.5 times of binding coal weight portion, is handed over
Join the addition of agent for 0.01 times of binding coal weight portion, be sufficiently mixed it is uniform, then in 200 DEG C of temperature, pressure 0.3MPa
Lower reaction 5 hours, (CS is evaporated by distillation2/ NMP mixed solvents) residue is obtained, residue is washed (with water pair
Residue carries out cyclic washing), drying and processing (by moisture control below 5%), obtain high-temperature agglomerant.
By jet coal, quick lime and the high-temperature agglomerant (being crushed to granularity≤150 micron respectively) according to 1:1.2:0.15
Ratio (mass ratio) carry out mixed processing, obtain mixed material, mixed material is carried out into forming processes with high-pressure ball press, obtain
It is not more than the oval pelletizing of 5cm to diameter, the compression strength of pelletizing is not less than 500N/, the pelletizing is put into 900 DEG C of heat
Solving carries out pyrolysis processing in stove, 1 hour residence time, the pelletizing after being pyrolyzed, and the compression strength of pelletizing is not less than after pyrolysis
900N/, heat endurance is not less than 90%, loads in furnace of calcium carbide smelt and obtain gas forming amount and be not less than 290L/ the pelletizing
The calcium carbide of kg.
Comparative example 1
Jet coal, the quick lime (being crushed to granularity≤150 micron respectively) that will be handled well are according to 1:1 ratio (mass ratio)
Mixed, it is to be mixed it is uniform after, pressure ball experiment is carried out by high-pressure ball press, the compression strength of pelletizing is not less than 500N/,
Then pelletizing is put into pyrolysis oven, it is 900 DEG C to set pyrolysis final temperature, and the residence time is 1 hour, the pressure resistance of pelletizing after pyrolysis
Less than 200N/, heat endurance is less than 40% to degree, and its intensity cannot meet the requirement into furnace of calcium carbide.
Comparative example 2
Jet coal, quick lime, the benzoyl peroxide (being crushed to granularity≤150 micron respectively) that will be handled well are according to 1:1:
0.01 ratio (mass ratio) is mixed, it is to be mixed it is uniform after, pressure ball experiment, the resistance to compression of pelletizing are carried out by high-pressure ball press
Intensity is not less than 500N/, and then pelletizing is put into pyrolysis oven, and it is 900 DEG C to set pyrolysis final temperature, and the residence time is 1 hour,
Less than 200N/, heat endurance is less than 40% to the compression strength of pelletizing, and its intensity cannot meet wanting into furnace of calcium carbide after pyrolysis
Ask.
Claims (9)
1. a kind of preparation method of high-temperature agglomerant, it is characterised in that comprise the following steps：(1) binding coal is crushed, is obtained
Caking property coal dust；(2) to adding CS in caking property coal dust2/ NMP mixed solvents are extracted, and are then centrifuged for separating, and are extracted
Liquid；(3) it is well mixed to obtain mixture to asphalt powder and crosslinking agent is added in extract；(4) mixture is reacted, it is right
Mixture after the completion of reaction is distilled, and evaporates CS2/ NMP mixed solvents, obtain residue；(5) residue is washed
Wash, dry, obtain high-temperature agglomerant.
2. according to the preparation method described in claim 1, it is characterised in that：Step (1) described binding coal is that caking index is big
In coals of the 50 or thickness of colloidal matter layer Y more than 10；Granularity≤75 μm of the caking property coal dust.
3. according to the preparation method described in claim 1, it is characterised in that：Step (2) described CS2In/NMP mixed solvents, CS2
It is 1 with the volume ratio of NMP：0.5-1；The binding coal and CS2The weight ratio of/NMP mixed solvents is 1：10-20.
4. according to the preparation method described in claim 1, it is characterised in that the addition of step (3) asphalt powder and crosslinking agent
Measure and be：According to mass ratio meter, binding coal：Asphalt powder：Crosslinking agent=1：0.2-0.5：0.005-0.01.
5. according to the preparation method described in claim 1, it is characterised in that step (3) described crosslinking agent is organic peroxide,
Preferably benzoyl peroxide or cumyl peroxide；Granularity≤75 μm of the asphalt powder；Preferably, the pitch is soft
Change 70 DEG C of point ＜.
6. according to the preparation method described in claim 1, it is characterised in that the condition of step (4) described reaction includes：Temperature is
100-200 DEG C, pressure be 0.1-0.3MPa under, react 3-5 hours.
7. according to the preparation method described in claim 1, it is characterised in that：Step (5) washing is to be washed with water；Institute
It is drying to moisture≤5% to state drying.
8. the high-temperature agglomerant for being prepared using preparation method described in claim 1 to 7 any one improves jet coal and quick lime
The method of intensity after mixing pelletizing pyrolysis, it is characterised in that comprise the following steps：(1) by jet coal, quick lime and high temperature bond
Agent is crushed respectively, is then well mixed, and obtains mixed material；(2) mixed material is molded, is obtained pelletizing；(3) by pelletizing
It is pyrolyzed, pelletizing after being pyrolyzed is obtained final product.
9. in accordance with the method for claim 8, it is characterised in that step (1) is according to mass ratio meter, jet coal：Quick lime：It is high
Warm binding agent=1：0.9-1.2：0.05-0.15.
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| CN201611056094.XA CN106753654A (en) | 2016-11-24 | 2016-11-24 | Improve high-temperature agglomerant of the jet coal with quick lime mixing pellet strength and its application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113754363A (en) * | 2021-09-16 | 2021-12-07 | 山东合旺新材料科技有限公司 | Light high-temperature-resistant concrete capable of utilizing slag and preparation method thereof |
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Application publication date: 20170531 |
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