CN105542822A - Hematite composite additive for reducing civil coke ignition temperature, preparing method and application - Google Patents

Hematite composite additive for reducing civil coke ignition temperature, preparing method and application Download PDF

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Publication number
CN105542822A
CN105542822A CN201610103042.7A CN201610103042A CN105542822A CN 105542822 A CN105542822 A CN 105542822A CN 201610103042 A CN201610103042 A CN 201610103042A CN 105542822 A CN105542822 A CN 105542822A
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iron ore
composite additive
rhombohedral iron
coal
additive
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CN105542822B (en
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杨颂
杜文广
刘守军
张智聪
上官炬
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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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    • 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
    • C10L10/00Use of additives to fuels or fires for particular purposes
    • C10L10/02Use of additives to fuels or fires for particular purposes for reducing smoke development
    • 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
    • C10L5/00Solid fuels
    • C10L5/02Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/04Raw material of mineral origin to be used; Pretreatment thereof
    • 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
    • C10L2230/00Function and purpose of a components of a fuel or the composition as a whole
    • C10L2230/22Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency

Abstract

The invention provides a hematite composite additive for reducing civil coke ignition temperature, a preparing method and application. The hematite composite additive is prepared from, by weight, 40-60 parts of hematite, 10-15 parts of lime-stone, 10-20 parts of quick lime and 20-40 parts of sodium carbonate. The raw materials are wide in source and rich, price is low, the ignition temperature reducing effect is remarkable, sulfur oxide and nitric oxide emission is reduced by over 70%, smoke dust emission is reduced by over 96%, and the hematite composite additive has great significance in coal consumption for village life of peri-urban areas, village and city environment quality improvement and haze weather reduction.

Description

Reduce the rhombohedral iron ore composite additive of domestic coke kindling temperature and method for making and application
Technical field
The present invention relates to a kind of the rhombohedral iron ore composite additive and the preparation method and application that reduce domestic coke kindling temperature.
Background technology
Coal burning is that the long duration obtains the major way of the energy at present and even from now in China, the dust, sulfurous gas, oxynitride etc. of the direct burning and exhausting of a large amount of coal are to ecotope, especially atmospheric environment causes serious harm, cause China's air environmental pollution serious, haze weather takes place frequently.Based on coal burning pollution present situation, country has successively put into effect a series of law and regulation, and takes strong punitive measures.Although certain containment effect is played in the aggravation of the enforcement of these regulations to coal burning pollution degree, the environmental objective that distance will reach is still poor very far away.
In fact, the coal-fired environmental pollution of rural household can not be ignored.According to initial estimate, northern country often burns 1 ton high volatilization raw coal, will discharge the carbonic acid gas (carbon emission coefficient 0.67) of more than 2.5 tons, other of more than 150 kilograms stain thing (oxidation of coal rate 0.85).Within 2014, civilian loose burning coal consumption is 1.6 hundred million tons, only accounts for 3.8% of national coal consumption, and for sulfur dioxide emissions, power plant of China annual emissions is 2,000,000 tons, and civilian loose burning, then up to 3,200,000 tons, is 1.6 times of power plant emission total amount.In addition, the series of problems such as smoke contamination, nitrogen oxides pollution, cinder pollution of civilian loose burning coal is inestimable especially to the destruction of ecotope.But, by the impact of the factors such as region, economy, culture, solve very difficult.Want the coal burning pollution problem fundamentally solving rural area and samll cities and towns, for these areas high-quality is provided, at a low price, clean alternative fuel is the task of top priority.
Domestic coke is based on bunker coal (steam coal), and is aided with a small amount of coking coal, sulphur-fixing agent, carburelant, ignition dope etc., utilizes existing coke-oven plant production unit, the clean solid fuel obtained by high temperature carbonization.Have into that block is good, moderate strength, low volatilization, low emission sulphur and the not easily advantage such as slagging scorification, without the need to desulfurization equipment, tail gas can meet discharging standards; And easily igniting, continuous fiery ability is strong, heat-up rate is fast, duration of combustion is long, be the desirable fuel of various domestic life stove and accessory.
Coke is used as domestic fuel, must solve that coke kindling temperature is high, the problem of ignition difficulties.At present, metallurgical coke kindling temperature is about 600 DEG C, and bituminous coal and anthracitic kindling temperature are respectively 350 DEG C and 500 DEG C.Therefore, by the introducing of ignition dope, kindling temperature must be down to about 400 DEG C, to meet domestic burners igniting requirement.
Patent about combustion-supporting agent for fuel coal is existing a lot, as CN90105106.3 discloses a kind of combustion-supporting agent for fuel coal, it contains at least one in boron mud, Wingdale, bauxitic clay, white clay, manganese slag, ferric oxide, canebreak and sodium carbonate, SODIUMNITRATE, sodium-chlor three kinds of sodium salts, this ignition dope obviously can improve combustion position, improves stove fire temperature; CN97105154.2 discloses a kind of combustion-supporting agent for fuel coal being applicable to multiple coal, select mine tailings, Manganse Dioxide, the waste residue of production potassium bichromate, the waste residue producing sodium dichromate 99, bauxitic clay, sodium hydroxide, sodium carbonate, SODIUMNITRATE, sodium oxide and canebreak to form by a certain percentage by boron mud, Calcium Carbide Ash, Wingdale, iron, during use, ignition dope is mixed by a certain percentage with coal; CN201310417513.8 discloses a kind of efficient energy-saving combustion-supporting agent for fuel coal and preparation method thereof, and its formula is made up of zinc oxide and Manganse Dioxide, can improve burning of coal activity and ignition characteristic, flame temperature.These ignition dopes are all the products for fire coal exploitation, mostly adopt the know-why helping oxygen to burn, directly add fire coal, impel coal Thorough combustion, the effect of play combustion-supporting, energization, economizing on coal.Because domestic coke needs the special process through high temperature carbonization, the most of component in combustion-supporting agent for fuel coal can lose efficacy because of pyrolytic decomposition; Therefore, domestic coke cannot use the combustion-supporting agent for fuel coal of prior art.Through retrieval, the additive reducing domestic coke kindling temperature has no report.
Summary of the invention
The object of this invention is to provide rhombohedral iron ore composite additive of a kind of reduction domestic coke kindling temperature of good cooling effect and its preparation method and application.
The ignition dope of the present invention and existing bibliographical information exists significantly to be distinguished, and is mainly manifested in: the mechanism that (1) reduces kindling temperature is different.Tradition combustion-supporting agent for fuel coal from as inflammable substance, because its kindling temperature is low, to ignite coal by spontaneous combustion, therefore, adds absolute prohibition pyroprocessing after ignition dope, otherwise will lose combustion-supporting effect; The combustion-supporting katalysis coming from composite oxides of the present invention.First, under high temperature carbonization reductive condition, rely on the catalytic gasification of auxiliary agent to act on coke surface and form carbon defects with inner, become the firing point of oxidizing fire; In addition, composite assistant, under high temperature reducing atmospheres, can form a small amount of microcrystalline, meets oxygen very easily combustion heat release formation localized hyperthermia point, thus the coke that ignites.(2) stage difference is added.Tradition combustion-supporting agent for fuel coal is many to add, then through mixing, bonding, coldmoulding before moulded coal preparation; Or directly enter stove after mixing with loose coal and burn.This patent auxiliary agent adds when destructive distillation coal blending, and through mixing, making firm by ramming, high temperature carbonization becomes civilian clean coke.
To achieve these goals, the technical solution used in the present invention is as follows:
Reduce a rhombohedral iron ore composite additive for domestic coke kindling temperature, its weight part consists of rhombohedral iron ore 40 ~ 60 parts, 10 ~ 15 parts, Wingdale, unslaked lime 10 ~ 20 parts, soda ash 20 ~ 40 parts.
Preparation method of the present invention, comprises the steps:
By dried rhombohedral iron ore, Wingdale, unslaked lime and soda ash additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(2) take broken good additive raw material respectively, and mixed, stir;
(3) the compound stirred, through dry grinding, makes raw material granularity≤150 order (0.1mm); Then calcine 1 ~ 2 hour under 260 ~ 300 DEG C of conditions, be cooled to normal temperature, be rhombohedral iron ore composite additive.
The application of rhombohedral iron ore composite additive of the present invention, comprises the steps:
By rhombohedral iron ore composite additive: the weight ratio of mixed coal is 0.2 ~ 1.0:100, rhombohedral iron ore composite additive is added in mixed coal, isolated air heating to 900 ~ 1100 DEG C in gas retort, continuous heating 16 ~ 24h, through quenching operation after red heat furnace charge is come out of the stove, again through screening, namely obtain the domestic coke containing rhombohedral iron ore composite additive.
The quality index of described mixed coal is: FC d>=50%, V adf>=25%, A d≤ 25%, S td< 1.5%.
Screening as above sieves the furnace charge of being down to normal temperature for 25-80mm granularity.
Prior art of the present invention is compared, that it directly brings and the advantage that certainly leads to and positively effect as follows:
In the methods of the invention, the rhombohedral iron ore composite additive adopted, raw material sources extensively enrich, cheap, be added directly in mixed coal, obtain the domestic coke containing rhombohedral iron ore composite additive by high temperature carbonization, its kindling temperature can be reduced to 385 ~ 420 DEG C from 550 ~ 630 DEG C, decline temperature amplitude reaches 165 ~ 210 DEG C, Be very effective.
In the methods of the invention, the domestic coke of production, compared with direct burning coal, oxysulfide and oxynitride reduce discharging more than 70%, and flue dust reduces discharging more than 96%, to solution surrounding city life in the countryside coal, improve rural area and city environmental quality, reduce haze weather and be of great immediate significance.
Embodiment
Below the specific embodiment of the present invention is made and illustrating further.
Embodiment 1
By dried rhombohedral iron ore, Wingdale, unslaked lime and soda ash additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(2) take broken good rhombohedral iron ore 60kg successively respectively, Wingdale 10kg, unslaked lime 10kg, soda ash 20kg, and mixed, stir;
(3) the compound stirred, through dry grinding, makes raw material granularity≤150 order (0.1mm); Then calcine 2 hours under 260 DEG C of conditions, be cooled to normal temperature, be rhombohedral iron ore composite additive;
(4) as-fired coal material is coordinated by the coking coal of the meager coal of the long-flame coal of 20wt%, 15wt%, 1/3 coking coal of 30wt%, the rich coal of 20wt% and 15wt% and forms mixed coal; The quality index of its mixed coal is: V adf30.0%, A d13.5%, FC d60.6%, S t,d0.67%; Adhesive index=74, fineness (≤3mm)=73.6%;
(5) press by rhombohedral iron ore composite additive: the weight ratio of mixed coal is 0.2:100, the rhombohedral iron ore composite additive made is added in mixed coal, isolated air heating to 1100 DEG C in gas retort, continuous heating 16h, then normal temperature is down to through quenching operation after being come out of the stove by red heat furnace charge, again through screening, obtain the domestic coke containing rhombohedral iron ore composite additive that granularity is 25-80mm.At the NS18-2 type 150m that Beijing Chuan Zi stove and accessory company limited produces 2carry out combustion test to civilian Jiao of gained in civilian reverberatory furnace, test its pollutant effulent, compared with direct fire coal, oxysulfide reduces discharging 72%, and oxynitride reduces discharging 70%, and flue dust reduces discharging 96%.
Comparative example: do not add any additive in mixed coal, isolated air heating to 1100 DEG C in gas retort, continuous heating 16h, is down to normal temperature through quenching operation after then being come out of the stove by red heat furnace charge, again through screening, gained granularity is that the coke of 25-80mm uses Jiao in contrast.
In JDRD-5A type determination of ignition point instrument, carry out burning-point test experiments respectively to civilian Jiao of gained and contrast with Jiao, experimental result is as shown in table 1.
Table 1 adds composite additive and contrasts with the burning-point not adding composite additive coke
Experiment group Burning-point DEG C Decline temperature DEG C
Contrast is burnt 550 -
Add civilian Jiao of composite additive 385 165
Embodiment 2
By additive raw materials such as dried rhombohedral iron ore, Wingdale, unslaked lime and soda ash respectively through thick broken, thin broken to granularity≤3mm;
(2) take broken good rhombohedral iron ore 55kg successively respectively, Wingdale 12kg, unslaked lime 13kg, soda ash 25kg, and mixed, stir;
(3) the compound stirred, through dry grinding, makes raw material granularity≤150 order (0.1mm); Then calcine 1.8 hours under 270 DEG C of conditions, pack after being cooled to normal temperature, be rhombohedral iron ore composite additive;
(4) as-fired coal is coordinated by the non-caking coal of the weakly caking coal of 30wt%, the long-flame coal of 40wt%, the gas-fat coal of 20wt% and 10wt% and forms mixed coal; Its quality index (wt%): V adf35.0%, A d13.5%, FC d56.2%, S t,d0.84%, adhesive index=40, fineness (≤3mm)=86.5%;
(5) press by rhombohedral iron ore composite additive: the weight ratio of mixed coal is 0.4:100, the rhombohedral iron ore composite additive made is added in mixed coal, isolated air heating to 1050 DEG C in gas retort, continuous heating 18h, then normal temperature is down to through quenching operation after being come out of the stove by red heat furnace charge, again through screening, obtain the domestic coke containing rhombohedral iron ore composite additive that granularity is 25-80mm.At the NS18-2 type 150m that Beijing Chuan Zi stove and accessory company limited produces 2carry out combustion test to civilian Jiao of gained in civilian reverberatory furnace, test its pollutant effulent, compared with direct fire coal, oxysulfide reduces discharging 74%, and oxynitride reduces discharging 71%, and flue dust reduces discharging 96.5%.
Comparative example: do not add any additive in mixed coal, isolated air heating to 1050 DEG C in gas retort, continuous heating 18h, is down to normal temperature through quenching operation after then being come out of the stove by red heat furnace charge, then through screening, gained granularity is that 25-80mm coke uses Jiao in contrast.
In JDRD-5A type determination of ignition point instrument, carry out burning-point test experiments respectively to civilian Jiao of gained and contrast with Jiao, experimental result is as shown in table 2.
Table 2 adds composite additive and contrasts with the burning-point not adding composite additive coke
Experiment group Burning-point DEG C Decline temperature DEG C
Contrast is burnt 570 -
Add civilian Jiao of composite additive 395 175
Embodiment 3
By additive raw materials such as dried rhombohedral iron ore, Wingdale, unslaked lime and soda ash respectively through thick broken, thin broken to granularity≤3mm;
(2) take broken good rhombohedral iron ore 50kg successively respectively, Wingdale 13kg, unslaked lime 15kg, soda ash 30kg, and mixed, stir;
(3) the compound stirred, through dry grinding, makes raw material granularity≤150 order (0.1mm); Then calcine 1.5 hours under 280 DEG C of conditions, pack after being cooled to normal temperature, be rhombohedral iron ore composite additive;
(4) as-fired coal material is coordinated by the coking coal of the meager coal of the long-flame coal of 20wt%, 15wt%, 1/3 coking coal of 30wt%, the rich coal of 20wt% and 15wt% and forms mixed coal; The quality index of its mixed coal is: V adf30.0%, A d13.5%, FC d60.6%, S t,d0.67%; Adhesive index=74, fineness (≤3mm)=73.6%;
(5) press by rhombohedral iron ore composite additive: the weight ratio of mixed coal is 0.6:100, the rhombohedral iron ore composite additive made is added in mixed coal, isolated air heating to 1000 DEG C in gas retort, continuous heating 20h, then normal temperature is down to through quenching operation after being come out of the stove by red heat furnace charge, again through screening, obtain the domestic coke containing rhombohedral iron ore composite additive that granularity is 25-80mm.At the NS18-2 type 150m that Beijing Chuan Zi stove and accessory company limited produces 2carry out combustion test to civilian Jiao of gained in civilian reverberatory furnace, test its pollutant effulent, compared with direct fire coal, oxysulfide reduces discharging 76%, and oxynitride reduces discharging 72%, and flue dust reduces discharging 97%;
Comparative example: do not add any additive in mixed coal, isolated air heating to 1000 DEG C in gas retort, continuous heating 20h, is down to normal temperature through quenching operation after then being come out of the stove by red heat furnace charge, then through screening, gained granularity is that 25-80mm coke uses Jiao in contrast.
In JDRD-5A type determination of ignition point instrument, carry out burning-point test experiments respectively to civilian Jiao of gained and contrast with Jiao, experimental result is as shown in table 3.
Table 3 adds composite additive and contrasts with the burning-point not adding composite additive coke
Experiment group Burning-point DEG C Decline temperature DEG C
Contrast is burnt 590 -
Add civilian Jiao of composite additive 405 185
Embodiment 4
By additive raw materials such as dried rhombohedral iron ore, Wingdale, unslaked lime and soda ash respectively through thick broken, thin broken to granularity≤3mm;
(2) take broken good rhombohedral iron ore 45kg successively respectively, Wingdale 14kg, unslaked lime 18kg, soda ash 35kg, and mixed, stir;
(3) the compound stirred, through dry grinding, makes raw material granularity≤150 order (0.1mm); Then calcine 1.3 hours under 290 DEG C of conditions, pack after being cooled to normal temperature, be rhombohedral iron ore composite additive;
(4) as-fired coal is coordinated by the non-caking coal of the weakly caking coal of 30wt%, the long-flame coal of 40wt%, the gas-fat coal of 20wt% and 10wt% and forms mixed coal; Its quality index (wt%): V adf35.0%, A d13.5%, FC d56.2%, S t,d0.84%, adhesive index=40, fineness (≤3mm)=86.5%;
(5) press by rhombohedral iron ore composite additive: the weight ratio of mixed coal is 0.8:100, the rhombohedral iron ore composite additive made is added in mixed coal, isolated air heating to 950 DEG C in gas retort, continuous heating 22h, then normal temperature is down to through quenching operation after being come out of the stove by red heat furnace charge, again through screening, obtain the domestic coke containing rhombohedral iron ore composite additive that granularity is 25-80mm.At the NS18-2 type 150m that Beijing Chuan Zi stove and accessory company limited produces 2carry out combustion test to civilian Jiao of gained in civilian reverberatory furnace, test its pollutant effulent, compared with direct fire coal, oxysulfide reduces discharging 77%, and oxynitride reduces discharging 73%, and flue dust reduces discharging 97.5%.
Comparative example: do not add any additive in mixed coal, isolated air heating to 950 DEG C in gas retort, continuous heating 22h, is down to normal temperature through quenching operation after then being come out of the stove by red heat furnace charge, then through screening, gained granularity is that 25-80mm coke uses Jiao in contrast.
In JDRD-5A type determination of ignition point instrument, carry out burning-point test experiments respectively to civilian Jiao of gained and contrast with Jiao, experimental result is as shown in table 4.
Table 4 adds composite additive and contrasts with the burning-point not adding composite additive coke
Experiment group Burning-point DEG C Decline temperature DEG C
Contrast is burnt 610 -
Add civilian Jiao of composite additive 415 195
Embodiment 5
By additive raw materials such as dried rhombohedral iron ore, Wingdale, unslaked lime and soda ash respectively through thick broken, thin broken to granularity≤3mm;
(2) take broken good rhombohedral iron ore 40kg successively respectively, Wingdale 15kg, unslaked lime 20kg, soda ash 40kg, and mixed, stir;
(3) the compound stirred, through dry grinding, makes raw material granularity≤150 order (0.1mm); Then calcine 1 hour under 300 DEG C of conditions, pack after being cooled to normal temperature, be rhombohedral iron ore composite additive;
(4) as-fired coal material is coordinated by the coking coal of the meager coal of the long-flame coal of 20wt%, 15wt%, 1/3 coking coal of 30wt%, the rich coal of 20wt% and 15wt% and forms mixed coal; The quality index of its mixed coal is: V adf30.0%, A d13.5%, FC d60.6%, S t,d0.67%; Adhesive index=74, fineness (≤3mm)=73.6%;
(5) press by rhombohedral iron ore composite additive: the weight ratio of mixed coal is 1.0:100, the rhombohedral iron ore composite additive made is added in mixed coal, isolated air heating to 900 DEG C in gas retort, continuous heating 24h, then normal temperature is down to through quenching operation after being come out of the stove by red heat furnace charge, again through screening, obtain the domestic coke containing rhombohedral iron ore composite additive that granularity is 25-80mm.At the NS18-2 type 150m that Beijing Chuan Zi stove and accessory company limited produces 2carry out combustion test to civilian Jiao of gained in civilian reverberatory furnace, test its pollutant effulent, compared with direct fire coal, oxysulfide reduces discharging 78%, and oxynitride reduces discharging 74%, and flue dust reduces discharging 98%;
Comparative example: do not add any additive in mixed coal, isolated air heating to 900 DEG C in gas retort, continuous heating 24h, is down to normal temperature through quenching operation after then being come out of the stove by red heat furnace charge, then through screening, gained granularity is that 25-80mm coke uses Jiao in contrast.
In JDRD-5A type determination of ignition point instrument, carry out burning-point test experiments respectively to civilian Jiao of gained and contrast with Jiao, experimental result is as shown in table 5.
Table 5 adds composite additive and contrasts with the burning-point not adding composite additive coke
Experiment group Burning-point DEG C Decline temperature DEG C
Contrast is burnt 630 -
Add civilian Jiao of composite additive 420 210
Can be found out by embodiment 1 ~ 5 experimental result, after adding rhombohedral iron ore composite additive, significantly reduce the burning-point of domestic coke, domestic coke is more easily caught fire, ensure that the application of domestic coke as a kind of fuel.

Claims (5)

1. reduce a rhombohedral iron ore composite additive for domestic coke kindling temperature, it is characterized in that its weight part of rhombohedral iron ore composite additive reducing domestic coke kindling temperature consists of rhombohedral iron ore 40 ~ 60 parts, 10 ~ 15 parts, Wingdale, unslaked lime 10 ~ 20 parts, soda ash 20 ~ 40 parts.
2. a kind of preparation method reducing the rhombohedral iron ore composite additive of domestic coke kindling temperature as claimed in claim 1, is characterized in that comprising the steps:
By dried rhombohedral iron ore, Wingdale, unslaked lime and soda ash additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(2) take broken good additive raw material respectively, and mixed, stir;
(3) the compound stirred, through dry grinding, makes raw material granularity≤0.1mm, then calcines 1 ~ 2 hour under 260 ~ 300 DEG C of conditions, is cooled to normal temperature, is rhombohedral iron ore composite additive.
3. a kind of application reducing the rhombohedral iron ore composite additive of domestic coke kindling temperature as claimed in claim 1, is characterized in that comprising the steps:
By rhombohedral iron ore composite additive: the weight ratio of mixed coal is 0.2 ~ 1.0:100, rhombohedral iron ore composite additive is added in mixed coal, isolated air heating to 900 ~ 1100 DEG C in gas retort, continuous heating 16 ~ 24h, through quenching operation after red heat furnace charge is come out of the stove, again through screening, namely obtain the domestic coke containing rhombohedral iron ore composite additive.
4. a kind of application reducing the rhombohedral iron ore composite additive of domestic coke kindling temperature as claimed in claim 3, is characterized in that the quality index of described mixed coal is: FC d>=50%, V adf>=25%, A d≤ 25%, S td< 1.5%.
5. a kind of application reducing the rhombohedral iron ore composite additive of domestic coke kindling temperature as claimed in claim 1, is characterized in that described screening sieves the furnace charge of being down to normal temperature for 25-80mm granularity.
CN201610103042.7A 2016-02-24 2016-02-24 The bloodstone compound additive and preparation method of reduction domestic coke ignition temperature and application Active CN105542822B (en)

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CN107189801A (en) * 2017-06-09 2017-09-22 太原理工大学 A kind of method of denitration during clean coke production and use
CN107338066A (en) * 2017-08-29 2017-11-10 太原理工大学 A kind of civilian clean coke and its production method
CN107502404A (en) * 2017-08-29 2017-12-22 太原理工大学 Reduce powder of straw compound additive and preparation method and the application of domestic coke ignition temperature
CN109735377A (en) * 2019-01-24 2019-05-10 太原科瑞康洁净能源有限公司 Inhibit the preparation of sodium calcium composite assistant and application of the loss of biomass fuel flue dust
CN109749807A (en) * 2019-01-24 2019-05-14 太原科瑞康洁净能源有限公司 Inhibit the preparation of iron calcium composite assistant and application of the loss of biomass fuel flue dust

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CN1206092A (en) * 1997-07-21 1999-01-27 中国科学院山西煤炭化学研究所 Preparation of sulfur-fixing waterproof boiler briquette
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CN107118789A (en) * 2017-06-09 2017-09-01 太原理工大学 Reduce iron-based compound additive and preparation method and the application of domestic coke nitrogen content
CN107189801A (en) * 2017-06-09 2017-09-22 太原理工大学 A kind of method of denitration during clean coke production and use
CN107338066A (en) * 2017-08-29 2017-11-10 太原理工大学 A kind of civilian clean coke and its production method
CN107502404A (en) * 2017-08-29 2017-12-22 太原理工大学 Reduce powder of straw compound additive and preparation method and the application of domestic coke ignition temperature
CN109735377A (en) * 2019-01-24 2019-05-10 太原科瑞康洁净能源有限公司 Inhibit the preparation of sodium calcium composite assistant and application of the loss of biomass fuel flue dust
CN109749807A (en) * 2019-01-24 2019-05-14 太原科瑞康洁净能源有限公司 Inhibit the preparation of iron calcium composite assistant and application of the loss of biomass fuel flue dust

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