CN105670728A - Kaolin composite additive capable of improving flame length of civilian coke and preparation method and application - Google Patents

Kaolin composite additive capable of improving flame length of civilian coke and preparation method and application Download PDF

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Publication number
CN105670728A
CN105670728A CN201610102995.1A CN201610102995A CN105670728A CN 105670728 A CN105670728 A CN 105670728A CN 201610102995 A CN201610102995 A CN 201610102995A CN 105670728 A CN105670728 A CN 105670728A
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kaolin
compound additive
flame
coal
parts
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CN105670728B (en
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张智聪
杜文广
刘守军
杨颂
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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    • 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
    • C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
    • 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
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0204—Metals or alloys
    • C10L2200/0209—Group I metals: Li, Na, K, Rb, Cs, Fr, Cu, Ag, Au
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0204—Metals or alloys
    • C10L2200/0213—Group II metals: Be, Mg, Ca, Sr, Ba, Ra, Zn, Cd, Hg
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0204—Metals or alloys
    • C10L2200/0236—Group VII metals: Mn, To, Re
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0254—Oxygen containing compounds
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0272—Silicon containing compounds
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/029—Salts, such as carbonates, oxides, hydroxides, percompounds, e.g. peroxides, perborates, nitrates, nitrites, sulfates, and silicates
    • 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
    • C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
    • C10L2230/18—Function and purpose of a components of a fuel or the composition as a whole for rendering the fuel or flame visible or for adding or altering its color
    • 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
    • C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
    • C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency

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  • Coke Industry (AREA)

Abstract

A kaolin composite additive capable of improving flame length of civilian coke is prepared from the following components in parts by weight: 40 to 60 parts of kaolin, 20 to 30 parts of limestone, 10 to 20 parts of red mud, and 5 to 10 parts of manganese dioxide. The kaolin composite additive provided by the invention is wide and abundant in sources of raw materials and low in price and can be added into mixed coal directly, and the civilian coke containing a bauxite composite additive can be obtained through high-temperature retorting, the flame length can be increased from 100 to 200mm to 450 to 670mm, the increased range is up to 350 to 470mm, and the effect is remarkable.

Description

Improve the Kaolin compound additive of the domestic coke length of flame and method for making and application
Technical field
The present invention relates to a kind of Kaolin compound additive improving the domestic coke length of flame and preparation method and application.
Background technology
Coal is as the leading energy of China, and its main Land use systems is burning. A large amount of coals directly burn problems such as causing climate change, Carbon cycle, environmental pollution and health hazard. Compared with industry and coal for power generation, although civilian scattered burning coal consumption figure is relatively low, but owing to lacking the devices such as effective flue gas ash removal, desulfurization, flue gas belongs in line, one of primary discharge source becoming China's atmospheric pollution. Therefore the civilian scattered burning raw coal of replacement of fuel with cleaning, environmental protection is the key improving atmospheric environment.
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., utilizes existing coke-oven plant to produce equipment, the clean solid fuel obtained by high-temperature retorting. Have that in bulk is good, moderate strength, low volatilization, low sulphur emissions and the not easily advantage such as slagging scorification, it is not necessary to desulfurization equipment, tail gas can meet discharging standards; And easily igniting, continuous fire ability is strong, programming rate fast, firing duration is long, is the various desirable fuel of domestic life stove.
Conventional metallurgical Jiao is mainly used in blast furnace ironmaking and non-ferrous metal metallurgy, it is desirable to have high intensity and low reaction activity. Mixed coal is in high-temperature retorting process, and its volatilization grades and constantly overflows, and causes that coke activity constantly declines; Simultaneously as process is the high-graphitized process of a continuous closed pore, cause that coke porosity sharply declines, cause its reactivity to reduce. Then require that as fuel its reactivity is higher and be beneficial to burning. Therefore make coke as a kind of suitable domestic fuel, it is necessary to improve the reactivity of domestic coke. The raw coal that volatility is higher additionally, existing stove mostly burns, its length of flame is longer, and boiler thermal output is high; But tradition coke combustion is substantially free of flame, if it can be used as fuel, only by radiant heat, the thermal efficiency of existing boiler is relatively low. Therefore domestic coke is as a kind of fuel, it is necessary to by the introducing of additive, improves its reactivity, increases its flame height, can meet the requirement as a kind of qualified domestic fuel.
Improve the patent of catalytic coal gasifaction activity aspect, as CN201410548041.4 discloses a kind of method improving catalytic coal gasifaction activity and catalyst recovery, first by dirty coal pickling deliming, the method then passing through dipping adds the potassium carbonate catalyst of 2-10wt% in coal, is remarkably improved the reactivity of coal;CN201310439546.2 discloses a kind of catalytic coal gasifaction Catalysts and its preparation method and purposes, the presoma being catalyst with cheap halogen ionic metal salt, adopt pH value regulator, effective metal component supported on coal-based by ion exchange technique, coal conversion can be effectively improved. These catalytic gasification agent are all the products for coal exploitation, directly support to coal, and its product is synthesis gas, without high-temperature retorting; Owing to domestic coke needs the special process through high-temperature retorting, its combustion process must increase reactivity and the length of flame. Through retrieval, the additive improving the domestic coke length of flame has no report.
Summary of the invention
It is an object of the invention to provide good Kaolin compound additive improving the domestic coke length of flame of a kind of reactivity and its preparation method and application.
Coal is when domestic stove burns, and particularly civil heating hot-water boiler, it is desirable to have certain length of flame, because tradition domestic stove is many by high-volatile bituminous coal fuel design. Bituminous coal ignition temperature is low longer with flame all relevant with its high volatile, and in bituminous coal temperature-rise period, volatile matter is overflowed, and the volatile matter namely overflowed not up to burning-point is black smoke, and after reaching burning-point, the volatile combustion of effusion forms flame. The volatile matter that bituminous coal is overflowed at a lower temperature is flue gas, major polluting atmosphere environment.
Metallurgical coke volatile matter is very low, is only about 1%, compact structure, reactive poor, and ignition temperature is higher and burns without obvious flame, i.e. length of flame much shorter compared with bituminous coal, it is impossible to normally use at tradition domestic stove.
After the civilian clean coke of the present invention adds auxiliary agent, civilian clean coke is compared with metallurgical coke, and (specific surface is by < 1m with relatively Large ratio surface to have more flourishing microcellular structure2/ g increases to 200m2/ g, the porosity is carried to 55% by 40%), reactivity is also carried to more than 55% by the 20% of metallurgical coke. When civilian cleaning coke uses as fuel, changing flame formation mechanism, burning and gasification and occur simultaneously, form flame by originally being become gasification generation CO from volatile matter generation flame, flame elongates, and is applicable to various domestic stove.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of Kaolin compound additive improving the domestic coke length of flame, its weight portion consists of Kaolin 40～60 parts, limestone 20～30 parts, red mud 10～20 parts, manganese dioxide 5～10 parts.
Preparation method of the present invention, comprises the steps:
(1) by dried Kaolin, limestone, red mud and manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(2) weigh the additive raw material crushed respectively, and be 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 room temperature, be Kaolin compound additive.
The application of Kaolin compound additive of the present invention, comprises the steps:
By Kaolin compound additive: mixed coal weight ratio is 0.2～1.0:100, Kaolin compound additive is added in mixed coal, gas retort completely cuts off air heat to 900～1100 DEG C, continuous heating 16～24h, then it is down to room temperature through quenching operation after being come out of the stove by red heat furnace charge, then through screening, namely obtain the domestic coke containing Kaolin compound additive.
The quality index of mixed coal described above is: FCd>=50%, Vadf>=25%, Ad≤ 25%, Std< 1.5%.
Screening is that the furnace charge that will drop to room temperature sieves as 25-80mm granularity as mentioned above.
Prior art of the present invention is compared, and advantage that is that it directly brings and that necessarily lead to is as follows with good effect:
In the methods of the invention, the Kaolin compound additive adopted, raw material sources extensively enrich, cheap, being added directly in mixed coal, prepare the domestic coke containing Kaolin compound additive by high-temperature retorting, its length of flame can increase to 450～670mm from 100～200mm, increase rate reaches 350～470mm, and effect is notable.
The domestic coke produced in the methods of the invention is compared with direct combustion of coke, under the premise not changing existing stove, significantly improves domestic coke combustion flame length and reactivity; The efficiency of combustion of domestic coke can being improved, make domestic coke fully burn, thus decreasing the discharge capacity of garbage, being conducive to environmental conservation.
Detailed description of the invention
Below the specific embodiment of the present invention is made and illustrating further.
Embodiment 1
(1) by dried Kaolin, limestone, red mud and manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(2) weigh the Kaolin 60kg crushed, limestone 20kg, red mud 10kg, manganese dioxide 5kg successively respectively, 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 room temperature, be Kaolin compound additive;
(4) as-fired coal material forms mixed coal with the jet coal of 20wt%, the meager coal of 15wt%, 1/3 coking coal of 30wt%, the rich coal of 20wt% and the coking coal of 15wt%; The quality index of its mixed coal is: Vadf30.0%, Ad13.5%, FCd60.6%, St,d0.67%; Adhesive index=74, fineness (≤3mm)=73.6%;
(5) by Kaolin compound additive: mixed coal weight ratio is 0.2:100, the Kaolin compound additive made is added in mixed coal, gas retort completely cuts off air heat to 1100 DEG C, continuous heating 16h, then it is down to room temperature through quenching operation after being come out of the stove by red heat furnace charge, then through screening, namely obtain the domestic coke containing Kaolin compound additive that granularity is 25-80mm.
Comparative example: without any additive in mixed coal, gas retort completely cuts off air heat to 1100 DEG C, continuous heating 16h, after then being come out of the stove by red heat furnace charge, be down to room temperature through quenching operation, then through screening, the coke that gained granularity is 25-80mm is burnt as comparison.
At the NS18-2 type 150m that Beijing Chuan Zi stove company limited produces2Respectively with Jiao, civilian Jiao of gained and comparison being carried out combustion test in civilian reverberatory furnace, by 0-500mm Steel Ruler test for flame height, test result is as shown in table 1.
Table 1 adds compound additive and the length of flame contrast being not added with compound additive coke
Experiment group Length of flame mm Raising value mm
Comparison is burnt 100 -
Add civilian Jiao of compound additive 450 350
Embodiment 2
(1) by dried Kaolin, limestone, red mud and manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(2) weigh the Kaolin 55kg crushed, limestone 22.5kg, red mud 12.5kg, manganese dioxide 6.3kg successively respectively, 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 room temperature, be Kaolin compound additive;
(4) as-fired coal forms mixed coal with the weakly caking coal of 30wt%, the jet coal of 40wt%, the gas rich coal of 20wt% and the dross coal of 10wt%; Its quality index (wt%): Vadf35.0%, Ad13.5%, FCd56.2%, St,d0.84%, adhesive index=40, fineness (≤3mm)=86.5%;
(5) by Kaolin compound additive: mixed coal weight ratio is 0.4:100, the Kaolin compound additive made is added in mixed coal, gas retort completely cuts off air heat to 1050 DEG C, continuous heating 18h, then it is down to room temperature through quenching operation after being come out of the stove by red heat furnace charge, then through screening, namely obtain the domestic coke containing Kaolin compound additive that granularity is 25-80mm.
Comparative example: without any additive in mixed coal, gas retort completely cuts off air heat to 1050 DEG C, continuous heating 18h, after then being come out of the stove by red heat furnace charge, be down to room temperature through quenching operation, then through screening, the coke that gained granularity is 25-80mm is burnt as comparison.
At the NS18-2 type 150m that Beijing Chuan Zi stove company limited produces2Respectively with Jiao, civilian Jiao of gained and comparison being carried out combustion test in civilian reverberatory furnace, by 0-500mm Steel Ruler test for flame height, test result is as shown in table 2.
Table 2 adds compound additive and the length of flame contrast being not added with compound additive coke
Experiment group Length of flame mm Raising value mm
Comparison is burnt 125 -
Add civilian Jiao of compound additive 505 380
Embodiment 3
(1) by dried Kaolin, limestone, red mud and manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(1) weigh the Kaolin 50kg crushed, limestone 250kg, red mud 15kg, titanium dioxide successively respectively
Manganese 7.5kg, 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 room temperature, be Kaolin compound additive;
(4) as-fired coal material forms mixed coal with the jet coal of 20wt%, the meager coal of 15wt%, 1/3 coking coal of 30wt%, the rich coal of 20wt% and the coking coal of 15wt%; The quality index of its mixed coal is: Vadf30.0%, Ad13.5%, FCd60.6%, St,d0.67%; Adhesive index=74, fineness (≤3mm)=73.6%;
(5) by Kaolin compound additive: mixed coal weight ratio is 0.6:100, the Kaolin compound additive made is added in mixed coal, gas retort completely cuts off air heat to 1000 DEG C, continuous heating 20h, then it is down to room temperature through quenching operation after being come out of the stove by red heat furnace charge, then through screening, namely obtain the domestic coke containing Kaolin compound additive that granularity is 25-80mm.
Comparative example: without any additive in mixed coal, gas retort completely cuts off air heat to 1000 DEG C, continuous heating 20h, after then being come out of the stove by red heat furnace charge, be down to room temperature through quenching operation, then through screening, the coke that gained granularity is 25-80mm is burnt as comparison.
At the NS18-2 type 150m that Beijing Chuan Zi stove company limited produces2Respectively with Jiao, civilian Jiao of gained and comparison being carried out combustion test in civilian reverberatory furnace, by 0-500mm Steel Ruler test for flame height, test result is as shown in table 3.
Table 3 adds compound additive and the length of flame contrast being not added with compound additive coke
Experiment group Length of flame mm Raising value mm
Comparison is burnt 560 -
Add civilian Jiao of compound additive 150 410
Embodiment 4
(1) by dried Kaolin, limestone, red mud and manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(2) secondary weigh the Kaolin 45kg crushed, limestone 27.5kg, red mud 17.5kg, manganese dioxide 8.7kg respectively, 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 room temperature, be Kaolin compound additive;
(4) as-fired coal forms mixed coal with the weakly caking coal of 30wt%, the jet coal of 40wt%, the gas rich coal of 20wt% and the dross coal of 10wt%; Its quality index (wt%): Vadf35.0%, Ad13.5%, FCd56.2%, St,d0.84%, adhesive index=40, fineness (≤3mm)=86.5%;
(5) by Kaolin compound additive: mixed coal weight ratio is 0.8:100, the Kaolin compound additive made is added in mixed coal, gas retort completely cuts off air heat to 950 DEG C, continuous heating 22h, then it is down to room temperature through quenching operation after being come out of the stove by red heat furnace charge, then through screening, namely obtain the domestic coke containing Kaolin compound additive that granularity is 25-80mm.
Comparative example: without any additive in mixed coal, gas retort completely cuts off air heat to 950 DEG C, continuous heating 22h, after then being come out of the stove by red heat furnace charge, be down to room temperature through quenching operation, then through screening, the coke that gained granularity is 25-80mm is burnt as comparison.
At the NS18-2 type 150m that Beijing Chuan Zi stove company limited produces2Respectively with Jiao, civilian Jiao of gained and comparison being carried out combustion test in civilian reverberatory furnace, by 0-500mm Steel Ruler test for flame height, test result is as shown in table 4.
Table 4 adds compound additive and the length of flame contrast being not added with compound additive coke
Experiment group Length of flame mm Raising value mm
Comparison is burnt 615 -
Add civilian Jiao of compound additive 175 440
Embodiment 5
(1) by dried Kaolin, limestone, red mud and manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(2) weigh the Kaolin 40kg crushed, limestone 30kg, red mud 20kg, manganese dioxide 10kg successively respectively, 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 room temperature, be Kaolin compound additive;
(4) as-fired coal material forms mixed coal with the jet coal of 20wt%, the meager coal of 15wt%, 1/3 coking coal of 30wt%, the rich coal of 20wt% and the coking coal of 15wt%; The quality index of its mixed coal is: Vadf30.0%, Ad13.5%, FCd60.6%, St,d0.67%; Adhesive index=74, fineness (≤3mm)=73.6%;
(5) by Kaolin compound additive: mixed coal weight ratio is 1.0:100, the Kaolin compound additive made is added in mixed coal, gas retort completely cuts off air heat to 900 DEG C, continuous heating 24h, then it is down to room temperature through quenching operation after being come out of the stove by red heat furnace charge, then through screening, namely obtain the domestic coke containing Kaolin compound additive that granularity is 25-80mm.
Comparative example: without any additive in mixed coal, gas retort completely cuts off air heat to 900 DEG C, continuous heating 24h, after then being come out of the stove by red heat furnace charge, be down to room temperature through quenching operation, then through screening, the coke that gained granularity is 25-80mm is burnt as comparison.
At the NS18-2 type 150m that Beijing Chuan Zi stove company limited produces2Respectively with Jiao, civilian Jiao of gained and comparison being carried out combustion test in civilian reverberatory furnace, by 0-500mm Steel Ruler test for flame height, test result is as shown in table 5.
Table 5 adds compound additive and the length of flame contrast being not added with compound additive coke
Experiment group Length of flame mm Raising value mm
Comparison is burnt 670 -
Add civilian Jiao of compound additive 200 470
By embodiment 1～5 experimental result it can be seen that after adding Kaolin compound additive, significantly improve the length of flame of domestic coke so that domestic coke efficiency of combustion is higher, and adaptability is wider, it is ensured that domestic coke is as the application of a kind of fuel.

Claims (5)

1. the Kaolin compound additive improving the domestic coke length of flame, it is characterised in that its weight portion consists of Kaolin 40～60 parts, limestone 20～30 parts, red mud 10～20 parts, manganese dioxide 5～10 parts.
2. the preparation method of a kind of Kaolin compound additive improving the domestic coke length of flame as claimed in claim 1, it is characterised in that comprise the steps:
(1) by dried Kaolin, limestone, red mud and manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤3mm;
(2) weigh the additive raw material crushed respectively, and be 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 room temperature, is Kaolin compound additive.
3. the application of a kind of Kaolin compound additive improving the domestic coke length of flame as claimed in claim 1, it is characterised in that comprise the steps:
By Kaolin compound additive: mixed coal weight ratio is 0.2～1.0:100, Kaolin compound additive is added in mixed coal, gas retort completely cuts off air heat to 900～1100 DEG C, continuous heating 16～24h, then it is down to room temperature through quenching operation after being come out of the stove by red heat furnace charge, then through screening, namely obtain the domestic coke containing Kaolin compound additive.
4. the application of a kind of Kaolin compound additive improving the domestic coke length of flame as claimed in claim 3, it is characterised in that the quality index of described mixed coal is: FCd>=50%, Vadf>=25%, Ad≤ 25%, Std< 1.5%.
5. the application of a kind of Kaolin compound additive improving the domestic coke length of flame as claimed in claim 3, it is characterised in that described screening is that the furnace charge that will drop to room temperature sieves as 25-80mm granularity.
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CN111471501A (en) * 2019-01-24 2020-07-31 太原科瑞康洁净能源有限公司 Preparation and application of sodium-based composite auxiliary agent for inhibiting dissipation of combustion smoke dust of civil coke

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CN102212406A (en) * 2011-04-25 2011-10-12 山东大学 Method for preparing sulfur-fixing agent by taking red mud in alumina plant as additive as well as product and application of sulfur-fixing agent
CN102311835A (en) * 2011-08-09 2012-01-11 圣永业（厦门）能源集团股份有限公司 Fire coal synergist

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GB1489690A (en) * 1976-05-25 1977-10-26 Coal Ind Briquetting coal
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CN102212406A (en) * 2011-04-25 2011-10-12 山东大学 Method for preparing sulfur-fixing agent by taking red mud in alumina plant as additive as well as product and application of sulfur-fixing agent
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* Cited by examiner, † Cited by third party
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CN111471501A (en) * 2019-01-24 2020-07-31 太原科瑞康洁净能源有限公司 Preparation and application of sodium-based composite auxiliary agent for inhibiting dissipation of combustion smoke dust of civil coke

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