CN107502403A - Reduce sawdust compound additive and preparation method and the application of domestic coke ignition temperature - Google Patents

Reduce sawdust compound additive and preparation method and the application of domestic coke ignition temperature Download PDF

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Publication number
CN107502403A
CN107502403A CN201710755137.1A CN201710755137A CN107502403A CN 107502403 A CN107502403 A CN 107502403A CN 201710755137 A CN201710755137 A CN 201710755137A CN 107502403 A CN107502403 A CN 107502403A
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sawdust
coal
additive
domestic coke
parts
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刘守军
杜文广
张智聪
杨颂
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Taiyuan Green Coke Energy Co Ltd
Taiyuan University of Technology
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Taiyuan Green Coke Energy Co Ltd
Taiyuan University of Technology
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Priority to CN201710755137.1A priority Critical patent/CN107502403A/en
Publication of CN107502403A publication Critical patent/CN107502403A/en
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00Other processes not covered before; Features of destructive distillation processes in general
    • C10B57/04Other processes not covered before; Features of destructive distillation processes in general using charges of special composition
    • C10B57/06Other processes not covered before; Features of destructive distillation processes in general using charges of special composition containing additives
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS 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
    • C10L9/00Treating solid fuels to improve their combustion
    • C10L9/10Treating solid fuels to improve their combustion by using additives
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS 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
    • C10L2200/00Components of fuel compositions
    • C10L2200/02Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0204Metals or alloys
    • C10L2200/0213Group II metals: Be, Mg, Ca, Sr, Ba, Ra, Zn, Cd, Hg
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS 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
    • C10L2200/00Components of fuel compositions
    • C10L2200/02Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0204Metals or alloys
    • C10L2200/0236Group VII metals: Mn, To, Re
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS 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
    • C10L2200/00Components of fuel compositions
    • C10L2200/02Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0254Oxygen containing compounds
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS 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
    • C10L2200/00Components of fuel compositions
    • C10L2200/04Organic compounds
    • C10L2200/0461Fractions defined by their origin
    • C10L2200/0469Renewables or materials of biological origin
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS 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
    • C10L2290/00Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/24Mixing, stirring of fuel components
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS 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
    • C10L2290/00Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/28Cutting, disintegrating, shredding or grinding

Abstract

A kind of parts by weight composition of sawdust additive for reducing domestic coke ignition temperature is 50~70 parts of sawdust, 20~30 parts of lime stone, 10~20 parts of manganese ore, 5~10 parts of zinc oxide.Raw material sources of the present invention enrich extensively, it is cheap, it is added directly in mixed coal, the domestic coke containing sawdust compound additive is made by high-temperature retorting, its ignition temperature can be reduced to 370~420 DEG C from 550~630 DEG C, decline temperature amplitude is up to 180~210 DEG C, compared with direct burning coal, oxysulfide emission reduction more than 50%, flue dust emission reduction more than 70%, to solving surrounding city life in the countryside coal, improve rural area and city environmental quality, reduce haze weather and be of great immediate significance.

Description

Reduce sawdust compound additive and preparation method and the application of domestic coke ignition temperature
Technical field
The present invention relates to a kind of sawdust compound additive and preparation method and application for reducing domestic coke ignition temperature.
Background technology
Coal burning be China at present so that from now on for quite a long time obtain the energy major way, a large amount of coals it is direct The dust of burning and exhausting, sulfur dioxide, nitrogen oxides etc. cause serious harm to ecological environment, especially atmospheric environment, Cause that China's air environmental pollution is serious, and haze weather takes place frequently.Based on pollution that caused by coal burning present situation, country has successively put into effect a series of Law and regulation, and take strong punitive measures.Although aggravation of the implementation of these regulations to pollution that caused by coal burning degree rises Acted on to certain containment, but still poor very remote of the distance environmental objective to be reached.
In fact, rural household fire coal environmental pollution can not be ignored.According to initial estimate, northern country often burns 1 ton of height Volatilize raw coal, it will discharges more than 2.5 tons of carbon dioxide (carbon emission coefficient 0.67), more than 150 kilograms other stain thing (oxidation of coal rate 0.85).Civilian scattered burning coal consumption is 1.6 hundred million tons within 2014, the 3.8% of national coal consumption is only accounted for, with sulfur dioxide Exemplified by discharge, power plant of China annual emissions are 2,000,000 tons, and civilian scattered burning is then up to 3,200,000 tons, is the 1.6 of power plant emission total amount Times.In addition, a series of problems, such as smoke contamination of civilian scattered burning coal, nitrogen oxides pollution, cinder pollution, is to ecological environment Destroy even more inestimable.However, being influenceed by factors such as region, economy, culture, solve very difficult.Want from root Solve the problems, such as the pollution that caused by coal burning of rural area and samll cities and towns in sheet, provide high-quality, low price for these areas, the alternative fuel of cleaning is to work as Business is anxious.
Domestic coke is based on bunker coal (thermal coal), and is aided with a small amount of coking coal, sulphur-fixing agent, carburant, combustion adjuvant etc., Using existing coke-oven plant's production equipment, pass through clean solid fuel obtained by high-temperature retorting.With blocking good, moderate strength, low Volatilization, low emission sulphur and the advantages that be not easy slagging, without desulfurization equipment, tail gas can meet discharging standards;And easy point Fire, continuous fiery ability is strong, programming rate is fast, firing duration length, is the various preferable fuel of domestic life stove.
Coke is used as domestic fuel, it is necessary to solves the problems, such as coke ignition temperature height, ignition difficulties.At present, metallurgical coke Fiery temperature is 600 DEG C or so, and bituminous coal and anthracitic ignition temperature are respectively 350 DEG C and 500 DEG C.Therefore, it is necessary to by helping The introducing of agent is fired, ignition temperature is down to 400 DEG C or so, to meet civilian furnace igniting requirement.
Patent on combustion-supporting agent for fuel coal is a lot, and as CN90105106.3 discloses a kind of combustion-supporting agent for fuel coal, it contains There are three kinds of boron mud, lime stone, bauxite, white clay, manganese slag, iron oxide, canebreak and sodium carbonate, sodium nitrate, sodium chloride sodium At least one of salt, the combustion adjuvant can obviously improve combustion position, improve stove fire temperature;CN97105154.2 discloses a kind of suitable For the combustion-supporting agent for fuel coal of a variety of coals, mine tailings, manganese dioxide, production potassium bichromate are selected by boron mud, Calcium Carbide Ash, lime stone, iron Waste residue, produce sodium dichromate waste residue, bauxite, sodium hydroxide, sodium carbonate, sodium nitrate, sodium oxide molybdena and canebreak press one Certainty ratio forms, and is well mixed combustion adjuvant by a certain percentage with coal during use;CN201310417513.8 discloses one Kind efficient energy-saving combustion-supporting agent for fuel coal and preparation method thereof, its formula is made up of zinc oxide and manganese dioxide, can improve burning of coal Activity and ignition performance, flame temperature.These combustion adjuvants are the products for coal-fired exploitation, mostly using the skill for helping oxygen to burn Art principle, is directly added into fire coal, promotes coal fully to burn, and plays a part of combustion-supporting, energization, economizes on coal.Because domestic coke needs To pass through the special process of high-temperature retorting, most of component in combustion-supporting agent for fuel coal can fail because of pyrolytic;Therefore, it is civilian Coke can not use the combustion-supporting agent for fuel coal of prior art.
The content of the invention
It is an object of the invention to provide a kind of sawdust compound additive that can significantly reduce domestic coke ignition temperature and its Preparation method and application.
Be present significant difference in the present invention and the combustion adjuvant of existing literature report, be mainly manifested in:1) ignition temperature is reduced Mechanism is different.Traditional combustion-supporting agent for fuel coal itself is combustibles, because its ignition temperature is low, is ignited coal by spontaneous combustion, therefore, addition helps Absolute prohibition high-temperature process after combustion agent, otherwise will lose combustion-supporting effect;The combustion-supporting catalytic action for coming from composite oxides of the present invention. First under high-temperature retorting reducing condition, act on coke surface by the catalytic gasification of auxiliary agent and be internally formed carbon defects, into For the firing point of oxidizing fire;In addition, composite assistant under high temperature reducing atmospheres, can form a small amount of microcrystalline, oxygen pole is met Easy firing heat release forms localized hyperthermia's point, so as to the coke that ignites.Sawdust is as pore creating material, added in domestic coke raw material, Varying number and the micropore of size are formed during high-temperature retorting, increases and improves the microcellular structure of domestic coke, with compound additive In other compositions one work, reduce the ignition temperature of domestic coke.2) it is different to add the stage.Traditional combustion-supporting agent for fuel coal exists more Moulded coal adds before preparing, then blended, cohesive, cold moudling;Or directly enter stove burning after being mixed with scattered coal.This patent auxiliary agent Added in destructive distillation coal blending, it is blended, make firm by ramming, high-temperature retorting turns into civilian clean coke.
Sawdust, also known as sawmilling face, refer to when timber is processed because cutting and fallen trees are in itself from trees Foam shape wood chip.According to statistics, from log to Wood products are produced, big appointment produces the sawdust for accounting for input raw material 22%~24% Deng wood wastes, annual about 24,000,000 m of the wood wastes such as caused sawdust in China's forestry process3, convert into standard 1,500,000 tons of coal.
Sawdust is soft in powdered, 0.4~0.8mm of particle diameter, is mainly made up of cellulose, hemicellulose and lignin, one As cellulose account for 40~50%, also 15~30% hemicellulose and 20~30% lignin, other compositions are resin, egg White matter, moisture and mineral matter etc., account for 2~15%.
The present invention first compounds sawdust and lime stone, manganese ore and zinc oxide the temperature of catching fire for reducing domestic coke Degree.
To achieve these goals, the technical solution used in the present invention is as follows:
It is a kind of reduce domestic coke ignition temperature sawdust compound additive, its parts by weight composition for 50~70 parts of sawdust, 20~30 parts of lime stone, 10~20 parts of manganese ore, 5~10 parts of zinc oxide.
Preparation method of the present invention, comprises the following steps:
(1) by sawdust, lime stone, manganese ore and crude zinc oxide materials respectively through thick broken, thin broken to granularity≤3mm;
(2) the additive raw material and sawdust crushed is weighed respectively, and is mixed, and is stirred;
(3) the compound to stir is dried 1~2 hour under the conditions of 100~150 DEG C, then through dry grinding, makes raw material The mesh (0.15mm) of granularity≤100;It is subsequently cooled to normal temperature, as sawdust compound additive.
The application of sawdust compound additive of the present invention, comprises the following steps:
By sawdust compound additive:Mixed coal weight ratio is 2.0~15.0:100, sawdust compound additive is added to and matched somebody with somebody Close in coal, air is completely cut off in gas retort and is heated to 900~1100 DEG C, 16~24h of continuous heating, then red heat furnace charge is come out of the stove Normal temperature is down to by quenching process, then it is screened, that is, obtain domestic coke.
The quality index of the mixed coal is:FCd>=50%, Vdaf>=25%, Ad≤ 13.5%, Std< 1.0%.
Described screening be down to normal temperature furnace charge screening be 25-80mm granularities.
The primary quality measure of domestic coke is as follows:Caloric value (Qnet,ar) >=5700kcal/kg, ash content (Ad)≤ 22wt%, volatile matter (Vd)≤5wt%, crushing strength (M25) >=75%, ignition temperature (T)≤420 DEG C, than surface (S)=20 ~40m2/g。
Prior art of the present invention is compared, it is that it directly brings and the advantages of necessarily lead to it is as follows with good effect:
In the methods of the invention, used sawdust compound additive, raw material sources enrich extensively, cheap, directly Connecing added in mixed coal, domestic coke is made by high-temperature retorting, its ignition temperature can be reduced to 360 from 550~630 DEG C~ 412 DEG C, decline temperature amplitude is up to 190~218 DEG C, significant effect.
In the methods of the invention, the domestic coke of production, compared with direct burning coal, oxysulfide emission reduction 50% with On, flue dust emission reduction more than 70%, to solving surrounding city life in the countryside coal, improve rural area and city environmental quality, reduce mist Haze weather is of great immediate significance.
Embodiment
Embodiment of the invention is made below and further being illustrated.
Embodiment 1
(1) by raw materials such as sawdust, lime stone, manganese ore and zinc oxide respectively through thick broken, thin broken to granularity≤3mm.
(2) the lime stone 20kg crushed, manganese ore 10kg, zinc oxide 5kg are weighed respectively successively, while it is (main to weigh sawdust Form:Cellulose 40.5wt%, hemicellulose 29.2wt%, lignin 28wt%, other 2.3wt%) 70kg, it is mixed in Together, and stir.
(3) the compound to stir is dried 2 hours under the conditions of 100 DEG C, then through dry grinding, makes raw material granularity≤100 Mesh (0.15mm);It is subsequently cooled to normal temperature, as sawdust compound additive (concrete composition:Cellulose 27.0wt%, hemicellulose 19.5wt%, lignin 18.7wt%, CaCO318.2wt%, MnO27.6wt%, MnO1.0wt%, Al2O30.5wt%, SiO21.9wt%, Fe2O30.2wt%, MgO0.2wt%, CaO0.6wt%, ZnO4.8wt%).
As-fired coal material by 20wt% jet coal, 15wt% meager coal, 30wt% 1/3 coking coal, 20wt% rich coal Coordinate with 15wt% coking coal and form mixed coal;The quality index of its mixed coal is:Vdaf30.0%, Ad13.5%, FCd60.6%, St,d0.67%;Adhesive index=74, fineness (≤3mm)=73.6%.
(5) sawdust compound additive is pressed:Mixed coal weight ratio is 15.0:100, the sawdust compound additive made is added Into mixed coal, isolation air is heated to 1100 DEG C in gas retort, continuous heating 16h, is passed through after then red heat furnace charge is come out of the stove Quenching process is down to normal temperature, then screened, obtains the domestic coke that granularity is 25-80mm;Its primary quality measure:Caloric value (Qnet,ar) 5957kcal/kg, ash content (Ad) 19.8wt%, volatile matter (Vd) 4.3wt%, crushing strength (M25) 74.9%, catch fire 360 DEG C of temperature (T), than surface (S) 39.7m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 58%, flue dust emission reduction 80%.
Comparative example:Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 1100 DEG C, is persistently added Hot 16h, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm coke It is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 1 to test result.
Table 1 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 550 -
Add civilian Jiao of compound additive 360 190
Embodiment 2
(1) by raw materials such as sawdust, lime stone, manganese ore and zinc oxide respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the lime stone 22.5kg crushed, manganese ore 13kg, zinc oxide 6.3kg respectively successively, while weigh saw End (main composition:Cellulose 43.2wt%, hemicellulose 26.7wt%, lignin 26wt%, other 4.1wt%) 65kg, will It mixes, and stirs.
(3) the compound to stir is dried 1.8 hours under the conditions of 112.5 DEG C, then through dry grinding, makes raw material granularity ≤ 100 mesh (0.15mm);It is subsequently cooled to normal temperature, as sawdust compound additive (concrete composition:Cellulose 26.3wt%, half Cellulose 16.3wt%, lignin 15.8wt%, CaCO320.1wt%, MnO29.7wt%, MnO1.3wt%, Al2O30.6wt%, SiO22.6wt%, Fe2O30.3wt%, MgO0.2wt%, CaO1.0wt%, ZnO5.9wt%).
(4) as-fired coal not gluing by 30wt% weakly caking coal, 40wt% jet coal, 20wt% gas rich coal and 10wt% Coal, which coordinates, forms mixed coal;Its quality index (wt%):Vdaf35.0%, Ad13.5%, FCd56.2%, St,d0.84%, bond Index G=40, fineness (≤3mm)=86.5%.
(5) sawdust compound additive is pressed:Mixed coal weight ratio is 11.8:100, the sawdust compound additive made is added Into mixed coal, isolation air is heated to 1050 DEG C in gas retort, continuous heating 18h, is passed through after then red heat furnace charge is come out of the stove Quenching process is down to normal temperature, then screened, obtains the domestic coke that granularity is 25-80mm;Its primary quality measure:Caloric value (Qnet,ar) 5943kcal/kg, ash content (Ad) 20.2wt%, volatile matter (Vd) 4.1wt%, crushing strength (M25) 78.1%, catch fire 372.5 DEG C of temperature (T), than surface (S) 36.1m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 57%, flue dust emission reduction 79.5%.
Comparative example:Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 1050 DEG C, is persistently added Hot 18h, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm coke It is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 2 to test result.
Table 2 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 570 -
Add civilian Jiao of compound additive 372.5 197.5
Embodiment 3
(1) by raw materials such as sawdust, lime stone, manganese ore and zinc oxide respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the lime stone 25kg crushed, manganese ore 15kg, zinc oxide 7.5kg respectively successively, while weigh sawdust (main composition:Cellulose 45.4wt%, hemicellulose 23.3wt%, lignin 24wt%, other 7.3wt%) 60kg, by it Mix, and stir.
(3) the compound to stir is dried 1.5 hours under the conditions of 125 DEG C, then through dry grinding, make raw material granularity≤ 100 mesh (0.15mm);It is subsequently cooled to normal temperature, as sawdust compound additive (concrete composition:Cellulose 25.4wt%, half is fine Tie up plain 13.0wt%, lignin 13.4wt%, CaCO322.2wt%, MnO211.1wt%, MnO1.5wt%, Al2O30.6wt%, SiO23.7wt%, Fe2O30.3wt%, MgO0.2wt%, CaO1.6wt%, ZnO7.0wt%).
As-fired coal material by 20wt% jet coal, 15wt% meager coal, 30wt% 1/3 coking coal, 20wt% rich coal Coordinate with 15wt% coking coal and form mixed coal;The quality index of its mixed coal is:Vdaf30.0%, Ad13.5%, FCd60.6%, St,d0.67%;Adhesive index=74, fineness (≤3mm)=73.6%.
(5) sawdust compound additive is pressed:Mixed coal weight ratio is 8.5:100, the sawdust compound additive made is added to In mixed coal, isolation air is heated to 1000 DEG C, continuous heating 20h in gas retort, through putting out after then red heat furnace charge is come out of the stove Burnt process is down to normal temperature, then screened, obtains the domestic coke that granularity is 25-80mm;Its primary quality measure:Caloric value (Qnet,ar) 5982kcal/kg, ash content (Ad) 20.1wt%, volatile matter (Vd) 3.7wt%, crushing strength (M25) 80.9%, catch fire 385 DEG C of temperature (T), than surface (S) 31.3m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 56%, flue dust emission reduction 79%.
Comparative example:Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 1000 DEG C, is persistently added Hot 20h, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm coke It is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 3 to test result.
Table 3 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 590 -
Add civilian Jiao of compound additive 385 205
Embodiment 4
(1) by raw materials such as sawdust, lime stone, manganese ore and zinc oxide respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the lime stone 27.5kg crushed, manganese ore 18kg, zinc oxide 8.7kg respectively successively, while weigh saw End (main composition:Cellulose 47.6wt%, hemicellulose 19.1wt%, lignin 22wt%, other 11.3wt%) 55kg, will It mixes, and stirs.
(3) the compound to stir is dried 1.3 hours under the conditions of 137.5 DEG C, then through dry grinding, makes raw material granularity ≤ 100 mesh (0.15mm);It is subsequently cooled to normal temperature, as sawdust compound additive (concrete composition:Cellulose 24.1wt%, half Cellulose 9.6wt%, lignin 11.1wt%, CaCO324.0wt%, MnO213.1wt%, MnO1.7wt%, Al2O30.7wt%, SiO24.9wt%, Fe2O30.3wt%, MgO0.2wt%, CaO2.3wt%, ZnO8.0wt%).
(4) as-fired coal not gluing by 30wt% weakly caking coal, 40wt% jet coal, 20wt% gas rich coal and 10wt% Coal, which coordinates, forms mixed coal;Its quality index (wt%):Vdaf35.0%, Ad13.5%, FCd56.2%, St,d0.84%, bond Index G=40, fineness (≤3mm)=86.5%.
(5) sawdust compound additive is pressed:Mixed coal weight ratio is 5.3:100, the sawdust compound additive made is added to In mixed coal, isolation air is heated to 950 DEG C, continuous heating 22h in gas retort, through quenching after then red heat furnace charge is come out of the stove Process is down to normal temperature, then screened, obtains the domestic coke that granularity is 25-80mm;Its primary quality measure:Caloric value (Qnet,ar) 6045kcal/kg, ash content (Ad) 19.6wt%, volatile matter (Vd) 3.4wt%, crushing strength (M25) 82.6%, catch fire 397.5 DEG C of temperature (T), than surface (S) 26.3m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 54%, flue dust emission reduction 78.5%.
Comparative example:Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 950 DEG C, is persistently added Hot 22h, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm coke It is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 4 to test result.
Table 4 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 610 -
Add civilian Jiao of compound additive 397.5 212.5
Embodiment 5
(1) by raw materials such as sawdust, lime stone, manganese ore and zinc oxide respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the lime stone 30kg crushed, manganese ore 20kg, zinc oxide 10kg respectively successively, while weigh sawdust (main composition:Cellulose 49.8wt%, hemicellulose 15.4wt%, lignin 20wt%, other 14.8wt%) 50kg, by it Mix, and stir.
(3) the compound to stir is dried 1 hour under the conditions of 150 DEG C, then through dry grinding, makes raw material granularity≤100 Mesh (0.15mm);It is subsequently cooled to normal temperature, as sawdust compound additive (concrete composition:Cellulose 22.6wt%, hemicellulose 7.0wt%, lignin 9.1wt%, CaCO326.0wt%, MnO214.5wt%, MnO1.9wt%, Al2O30.8wt%, SiO25.7wt%, Fe2O30.4wt%, MgO0.2wt%, CaO2.7wt%, ZnO9.1wt%).
As-fired coal material by 20wt% jet coal, 15wt% meager coal, 30wt% 1/3 coking coal, 20wt% rich coal Coordinate with 15wt% coking coal and form mixed coal;The quality index of its mixed coal is:Vdaf30.0%, Ad13.5%, FCd60.6%, St,d0.67%;Adhesive index=74, fineness (≤3mm)=73.6%.
(5) sawdust compound additive is pressed:Mixed coal weight ratio is 2.0:100, the sawdust compound additive made is added to In mixed coal, isolation air is heated to 900 DEG C, continuous heating 24h in gas retort, through quenching after then red heat furnace charge is come out of the stove Process is down to normal temperature, then screened, obtains the domestic coke that granularity is 25-80mm;Its primary quality measure:Caloric value (Qnet,ar) 6156kcal/kg, ash content (Ad) 18.5wt%, volatile matter (Vd) 3.1wt%, crushing strength (M25) 84.5%, catch fire 412 DEG C of temperature (T), than surface (S) 20.2m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 52%, flue dust emission reduction 76%.
Comparative example:Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 900 DEG C, is persistently added Hot 24h, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm coke It is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 5 to test result.
Table 5 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 630 -
Add civilian Jiao of compound additive 412 218
After can be seen that addition sawdust compound additive by the experimental result of embodiment 1~5, civilian Jiao is significantly reduced The burning-point of charcoal so that domestic coke is more easy to catch fire, and ensure that domestic coke as a kind of application of fuel.

Claims (6)

1. a kind of sawdust additive for reducing domestic coke ignition temperature, it is characterised in that parts by weight composition is sawdust 50~70 Part, 20~30 parts of lime stone, 10~20 parts of manganese ore, 5~10 parts of zinc oxide.
2. a kind of preparation method of sawdust additive for reducing domestic coke ignition temperature as claimed in claim 1, its feature It is to comprise the following steps:
(1) by sawdust, lime stone, manganese ore and crude zinc oxide materials respectively through thick broken, thin broken to granularity≤3mm;
(2) the additive raw material and sawdust crushed is weighed respectively, and is mixed, and is stirred;
(3) the compound to stir is dried 1~2 hour under the conditions of 100~150 DEG C, then through dry grinding, makes raw material granularity ≤ 150 mesh;It is subsequently cooled to normal temperature, as sawdust compound additive.
A kind of 3. application of sawdust additive for reducing domestic coke ignition temperature as claimed in claim 1, it is characterised in that Comprise the following steps:
By sawdust compound additive:Mixed coal weight ratio is 2.0~15.0:100, sawdust compound additive is added to mixed coal In, isolation air is heated to 900~1100 DEG C in gas retort, 16~24h of continuous heating, is passed through after then red heat furnace charge is come out of the stove Quenching process is down to normal temperature, then screened, that is, obtains the domestic coke containing sawdust compound additive.
A kind of 4. application of sawdust additive for reducing domestic coke ignition temperature as claimed in claim 3, it is characterised in that Comprise the following steps:The quality index of the mixed coal is:FCd>=50%, Vdaf>=25%, Ad≤ 25%, Std< 1.5%.
A kind of 5. application of sawdust additive for reducing domestic coke ignition temperature as claimed in claim 3, it is characterised in that Comprise the following steps:Described screening be down to normal temperature furnace charge screening be 25-80mm granularities.
6. using the domestic coke prepared as described in claim any one of 3-5, it is characterised in that the prevailing quality of domestic coke Index is as follows:Caloric value >=5700kcal/kg, ash content≤22wt%, volatile matter≤5wt%, crushing strength >=75%, ignition temperature ≤ 420 DEG C, than surface=20~40m2/g。
CN201710755137.1A 2017-08-29 2017-08-29 Reduce sawdust compound additive and preparation method and the application of domestic coke ignition temperature Pending CN107502403A (en)

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CN105316013A (en) * 2014-07-31 2016-02-10 宝山钢铁股份有限公司 Method for producing coke by replacing part of coal by sawdust
CN105733728A (en) * 2016-02-24 2016-07-06 太原理工大学 Magnetite composite additive for reducing ignition temperature of civilian coke, preparation method and application

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105316013A (en) * 2014-07-31 2016-02-10 宝山钢铁股份有限公司 Method for producing coke by replacing part of coal by sawdust
CN105733728A (en) * 2016-02-24 2016-07-06 太原理工大学 Magnetite composite additive for reducing ignition temperature of civilian coke, preparation method and application

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