CN105482842B - A kind of technique that coking is carried out to the coal raw material containing low-order coal - Google Patents
A kind of technique that coking is carried out to the coal raw material containing low-order coal Download PDFInfo
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Abstract
The invention discloses a kind of techniques for carrying out coking to the coal raw material containing low-order coal, (1) low-order coal is crushed and is mixed to form low-order coal raw material with auxiliary agent, then it is mixed to form feed coal with the scala media coal of crushing, high-order coal or middle high-order coal raw material again, feed coal is carried out using tamping machine to make molding firm by ramming；(2) molding feed coal is pushed into coke oven and will carry out coking, control coking temperature is greater than 800 DEG C, and scorch time is not less than 15 hours, collects the mixture of the raw gas of spilling, tar, crude benzol, while obtaining byproduct coke；Wherein the auxiliary agent is in the 850 DEG C of isolation organic binders of air destructive distillation weightlessness less than 50%.(1) technique that coking is carried out to the coal raw material containing low-order coal in the present invention, the problem of not only solving low existing tamping coke furnace availability, coking industry excess capacity also solves the problem for keeping its application limited due to no large-scale industrialization equipment for low-order coal.
Description
Technical field
The present invention relates to a kind of coking process, and in particular to a kind of work that coking is carried out to the coal raw material containing low-order coal
Skill belongs to low order coking of coal transformation technology field.
Background technique
Coal is the main energy sources in China, and 70% is accounted for about in primary energy structure.During very long geological changes,
The formation of coal is caused categories of coal various by the effect of many factors.According to the difference of structure and composition, coal is divided into brown
3 major class of coal, bituminous coal and anthracite, metabituminous coal is divided into lower-grade metamorphic bituminous and mesometamorphism bituminous coal again, lower-grade metamorphic bituminous to be called time cigarette
Coal is referred to as " low-order coal " together with lignite.Low-order coal is the product at incoalation initial stage, with phosphorus content is low, moisture is high, easy
The characteristics of dusting, easy spontaneous combustion, fugitive constituent height, immersion intensity difference, anti-dropping intensity difference, these characteristics are limited to the direct of low-order coal
Development and utilization, but according to statistics, China's low order coal reserves account for the whole nation and have verified 55% of coal reserves or more, up to 561,200,000,000 tons, this nothing
It doubts and causes a kind of waste of resource.And with domestic energy demand increasingly increase and high-quality coal stock number falls sharply,
The conversion comprehensive utilization of low-order coal becomes people's increasingly focus of attention.
The process for upgrading of low-order coal is one of the means of low-order coal trans-utilization, is in isolation air or non-oxide gas
Low-order coal is heated to low temperature upgrading in 200-800 DEG C of progress under the conditions of atmosphere, finally obtains the processing side of tar, coal gas and semicoke
Method.But current low-order coal upgrading technology is in experimental study and engineering original application stage, and there is no keep it extensive
The equipment of industrial applications thus limits the development and utilization of low-order coal.
Tamping coke furnace is the enlarged equipment used in the coking process of coal, and occupied area is wide, and investment capital cost is big,
High-temperature coking is primarily referred to as using the coking process that tamping coke furnace carries out coking to obtain coke and recycling chemical products, coke
Product is mainly that metallurgical coke or chemical industry are burnt, and due to the quality requirements industrially to metallurgical coke or chemical industry coke, the coal for using it is former
Material includes mainly the coals such as coking coal, 1/3 coking coal, bottle coal, rich coal, lean coal, meager lean coal, belongs to mesometamorphism bituminous coal, due in recent years
The shortage of coal resources, especially for coking industry middle high-quality coal raw material reduction so that the raw material of coking industry at
This is growing day by day, in addition the decline of a large amount of industries for needing metallurgical coke or chemical industry coke such as steel, metallurgy in recent years, on the one hand, makes
The price of coke product drastically reduces, the rise of cost of material, the decline of product price, so that China's major part coking industry passes through
Ji benefit seriously glides, and on the other hand, the reduction of coke demand forces coke-oven plant to reduce coke output, but due to stamp-charging coke
Furnace is once out of service to be scrapped, therefore in order to protect the tamping coke furnace equipment for furnishing a huge amount of money for invest to build, is had in minimum journey
The operation that coke oven is maintained in degree, not only reduces the availability of tamping coke furnace, also causes the excess capacity of coking industry.To sum up institute
The coking industry how saved and be on the verge of negative growth is stated, the availability of tamping coke furnace is improved, solves asking for coking industry excess capacity
Topic has become coking industry letter major issue to be solved.
It is well known that its purpose of traditional coking process primarily to obtain coke, especially metallurgical coke, first to
It solves the problems, such as coking industry negative growth, feed coal price needed for coking industry is greatly reduced or improves coke price or two
It is selectable approach that person has both simultaneously, currently, coke price cannot achieve improvements in a short time, then feed coal can only be reduced
Price, but the requirement due to Coke Industry for coke quality have then been traced in the requirement to feed coal, are had to tight
Lattice limit the index of its volatile matter and ash content.Low-order coal is the coal that price is more cheap in feed coal, if it is possible to effectively benefit
With low-order coal, extricate oneself from a plight then will be helpful to coking industry.But low-order coal has volatile matter height, easy dusting, ash content high
Feature, and the index of volatile matter and ash content that coking proposes feed coal is very stringent, this is just doomed can not by using low-order coal
Solve the problems, such as coking industry feed coal price.
Summary of the invention
For solve the problems, such as in the prior art low-order coal cannot achieve large-scale application and existing coking industry excess capacity,
The low problem of tamping coke furnace availability, to provide a kind of technique for carrying out coking to the coal raw material containing low-order coal.
For this purpose, the technical scheme adopted by the invention is as follows,
A kind of technique carrying out coking to the coal raw material containing low-order coal, including,
(1) by low-order coal crush and be mixed to form low-order coal raw material with auxiliary agent, then again with the scala media coal of crushing, high-order coal
Or one or more of middle high-order coal is mixed to form feed coal, and the feed coal is press-formed；
(2) molding feed coal is pushed into coke oven and carries out coking, control coking temperature is greater than 800 DEG C, and scorch time is not
Less than 15 hours, the mixture of the raw gas of spilling, tar, crude benzol is collected, while obtaining byproduct coke；
Wherein the auxiliary agent is in the 850 DEG C of isolation organic binders of air destructive distillation weightlessness less than 50%.
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, the organic binder is greater than for softening point
100 DEG C of asphalitine.
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, the auxiliary agent is that coal tar pitch or petroleum drip
Blueness, softening point are not less than 120 DEG C.
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, the softening point of the pitch is not less than 140
℃。
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, the pitch is hard pitch, with quality
Meter, the fixation carbon content of the hard pitch is 25% or more, C/Hratio 8-11.
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, in mass, the additional amount of the auxiliary agent
For the 5-40wt% of the low order coal quality.
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, in mass, the additional amount of the auxiliary agent
For the 10-30wt% of the low order coal quality.
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, in mass, the addition of the low-order coal
Amount is the 50-80wt% of raw material coal quality.
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, in mass, the addition of the low-order coal
Amount is the 50-70wt% of raw material coal quality.
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, the G value of the low-order coal is less than 50, volatilization
Part content is greater than 40%.
In the above-mentioned technique for carrying out coking to the coal raw material containing low-order coal, coking temperature 900- in the step (2)
1200℃。
The above-mentioned technique for carrying out coking to the coal raw material containing low-order coal carries out in tamping coke furnace, and the feed coal exists
It carries out making molding firm by ramming in tamping machine.
Compared with prior art, the invention has the advantages that,
(1) technique for carrying out coking in the present invention to the coal raw material containing low-order coal, not only solves existing tamping coke furnace
The problem of availability is low, coking industry excess capacity, also solves for low-order coal since no large-scale industrialization equipment makes
The limited problem of its application.
It is added in feed coal in the application and completely cuts off asphalitine of the air destructive distillation weightlessness less than 50% at 850 DEG C as bonding
Agent, is on the one hand conducive to low-order coal and forms in tamping machine, carries out coking to can be pushed into tamping coke furnace, another
Its solid product is not pulverized easily after the completion of aspect low order coking of coal, is easy to the coke pushing of tamping coke furnace, it is most important that the auxiliary agent
After mixing with low-order coal, wherein the effective component in auxiliary agent facilitates the drop of the high molecular polymer in low-order coal at high temperature
High molecular fracture in solution and low-order coal makes oil gas total amount increase production 10% or more to improve the yield of oil gas in technical process.
And the main component in raw gas is hydrogen and methane, currently, the price of hydrogen, methane is much higher than the price of coke, yield
Increase improve the economic benefit of enterprise, meanwhile, compared with using middle and high rank coal as the coking process of raw material, adopting in the prior art
It uses low-order coal as the raw material of coking process, can largely reduce cost of material, while exploitation and benefit to low-order coal
With significant.
(2) technique for carrying out coking in the present invention to the coal raw material containing low-order coal, the auxiliary agent are that coal or petroleum are former
The pitch that material reaction is formed, and the softening point of the pitch is not less than 120 DEG C, its solid produces after the completion of improving low order coking of coal
Object-coke quality, in coke volatile matter can be used for generating electricity no more than the 3-4% by-product coke made, gas making and its
Its chemical industry purpose.
Specific embodiment
The application to containing low-order coal coal raw material carry out coking technique be suitable for all low-order coals, scala media coal,
High-order coal or middle high-order coal raw material, for purposes of illustration only, low-order coal is by taking ub-bituminous coal or lignite as an example in following embodiments, non-low-order coal
Coal raw material by taking 1/3 coking coal as an example.
Wherein, quality=low-order coal quality of dry coal × 75%+ non-low-order coal quality × 90%+ auxiliary agent quality,
What " kg/t dry coal " referred to dry coal per ton obtains how many kilograms of product.
Embodiment 1
(1) ub-bituminous coal is crushed and is mixed to form low-order coal raw material with auxiliary agent, then mix shape with 1/3 coking coal of crushing again
At feed coal, feed coal is carried out using tamping machine to make molding firm by ramming, wherein in mass, the additional amount of auxiliary agent is ub-bituminous coal
The 40wt% of quality, the additional amount of the ub-bituminous coal are the 65wt% of the raw material coal quality, and the G value of the ub-bituminous coal is 45,
Volatile content is 65%, and the asphalitine that the auxiliary agent is 105 DEG C of softening point, the asphalitine is in 850 DEG C of isolation air destructive distillation
Weightlessness 45%；
(2) molding feed coal is pushed into coke oven and carries out coking, 850 DEG C of coking temperature of control, scorch time 16 hours,
The mixture of the raw gas overflowed, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 450Nm3/ t dry coal, the amount of the tar are 54kg/t dry coal, and the amount of the byproduct coke is 570kg/t dry coal,
The amount of the crude benzol is 16kg/t dry coal.In mass, solids carbon content is not less than 72% in coke, and volatile matter content is not more than
6%, partial size is the 30% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 55% of coke gross mass.
Embodiment 2
(1) ub-bituminous coal is crushed and is mixed to form low-order coal raw material with auxiliary agent, then form original with 1/3 coking coal of crushing again
Expect coal, feed coal is carried out using tamping machine to make molding firm by ramming, wherein in mass, the addition quality of auxiliary agent is ub-bituminous coal matter
The 35wt% of amount, the additional amount of the ub-bituminous coal are the 50wt% of the raw material coal quality, and the G value of the ub-bituminous coal is 40, are waved
Sending out part content is 70%, and the asphalitine that the auxiliary agent is 115 DEG C of softening point, the asphalitine is lost in 850 DEG C of isolation air destructive distillation
Weigh 40%；
(2) molding feed coal is pushed into coke oven and carries out coking, control 900 DEG C of coking temperature, scorch time 15.5 is small
When, the mixture of the raw gas of spilling, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 500Nm3/ t dry coal, the amount of the tar are 54kg/t dry coal, and the amount of the byproduct coke is 505kg/t dry coal,
The amount of the crude benzol is 16kg/t dry coal.In mass, solids carbon content is not less than 70% in coke, and volatile matter content is not more than
5%, partial size is the 20% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 60% of coke gross mass.
Embodiment 3
(1) ub-bituminous coal is crushed and is mixed to form low-order coal raw material with auxiliary agent, then mix shape with 1/3 coking coal of crushing again
At feed coal, feed coal is carried out using tamping machine to make molding firm by ramming, wherein in mass, the addition quality of auxiliary agent is time cigarette
The 30wt% of coal quality, the additional amount of the ub-bituminous coal are the 70wt% of the raw material coal quality, and the G value of the ub-bituminous coal is
35, volatile content 45%, the auxiliary agent is 120 DEG C of softening point of asphalitine, and the asphalitine is done in 850 DEG C of isolation air
Evaporate weightlessness 42%；
(2) molding feed coal is pushed into coke oven and carries out coking, 950 DEG C of coking temperature of control, scorch time 17 hours,
The mixture of the raw gas overflowed, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 500Nm3/ t dry coal, the amount of the tar are 54kg/t dry coal, and the amount of the byproduct coke is 505kg/t dry coal,
The amount of the crude benzol is 16kg/t dry coal.In mass, solids carbon content is not less than 74% in coke, and volatile matter content is not more than
4%, partial size is the 20% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 60% of coke gross mass.
Embodiment 4
(1) ub-bituminous coal is crushed and is mixed to form low-order coal raw material with auxiliary agent, then mix shape with 1/3 coking coal of crushing again
At feed coal, feed coal is carried out using tamping machine to make molding firm by ramming, wherein in mass, the addition quality of auxiliary agent is time cigarette
The 25wt% of coal quality, the additional amount of the ub-bituminous coal are that the G value of ub-bituminous coal described in the 75wt% of the raw material coal quality is 30,
Volatile content is 65%, and the asphalitine that the auxiliary agent is 130 DEG C of softening point, the asphalitine is in 850 DEG C of isolation air destructive distillation
Weightlessness 40%；
(2) molding feed coal is pushed into coke oven and carries out coking, control 1000 DEG C of coking temperature, scorch time 16.5 is small
When, the mixture of the raw gas of spilling, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 680Nm3/ t dry coal, the amount of the tar are 93kg/t dry coal, and the amount of the byproduct coke is 390kg/t dry coal,
The amount of the crude benzol is 27kg/t dry coal.In mass, solids carbon content is not less than 57% in coke, and volatile matter content is not more than
4%, partial size is the 20% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 60% of coke gross mass.
Embodiment 5
(1) ub-bituminous coal is crushed and is mixed to form low-order coal raw material with auxiliary agent, then mix shape with 1/3 coking coal of crushing again
At feed coal, feed coal is carried out using tamping machine to make molding firm by ramming, wherein in mass, the addition quality of auxiliary agent is time cigarette
The 20wt% of coal quality, the additional amount of the ub-bituminous coal are the 80wt% of the raw material coal quality, and the G value of the ub-bituminous coal is
20, volatile content 60%, the auxiliary agent is 140 DEG C of softening point of asphalitine, and the asphalitine is done in 850 DEG C of isolation air
Evaporate weightlessness 35%；
(2) molding feed coal is pushed into coke oven and carries out coking, control 1100 DEG C of coking temperature, scorch time 18 is small
When, the mixture of the raw gas of spilling, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 680Nm3/ t dry coal, the amount of the tar are 90kg/t dry coal, and the amount of the byproduct coke is 407kg/t dry coal,
The amount of the crude benzol is 27kg/t dry coal.In mass, solids carbon content is not less than 56% in coke, and volatile matter content is not more than
4%, partial size is the 20% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 60% of coke gross mass.
Embodiment 6
(1) ub-bituminous coal is crushed and is mixed to form low-order coal raw material with auxiliary agent, then mix shape with 1/3 coking coal of crushing again
At feed coal, feed coal is carried out using tamping machine to make molding firm by ramming, wherein in mass, the addition quality of auxiliary agent is time cigarette
The 15wt% of coal quality, the additional amount of the ub-bituminous coal are the 55wt% of the raw material coal quality, and the G value of the ub-bituminous coal is
15, volatile content 55%, the hard pitch that the auxiliary agent is 150 DEG C of softening point, the hard pitch is in 850 DEG C of isolations skies
Gas destructive distillation weightlessness is less than 40%, fixed carbon content 28%, C/Hratio 8；
(2) molding feed coal is pushed into coke oven and carries out coking, 950 DEG C of coking temperature of control, scorch time 20 hours,
The mixture of the raw gas overflowed, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 570Nm3/ t dry coal, the amount of the tar are 62kg/t dry coal, and the amount of the byproduct coke is 492kg/t dry coal,
The amount of the crude benzol is 18kg/t dry coal.In mass, solids carbon content is not less than 64% in coke, and volatile matter content is not more than
5%, partial size is the 20% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 60% of coke gross mass.
Embodiment 7
(1) ub-bituminous coal is crushed and is mixed to form low-order coal raw material with auxiliary agent, then mix shape with 1/3 coking coal of crushing again
At feed coal, feed coal is carried out using tamping machine to make molding firm by ramming, wherein in mass, the addition quality of auxiliary agent is time cigarette
The 10wt% of coal quality, the additional amount of the ub-bituminous coal are the 60wt% of the raw material coal quality, and the G value of the ub-bituminous coal is
20, volatile content 50%, the hard pitch that the auxiliary agent is 170 DEG C of softening point, the hard pitch is in 850 DEG C of isolations skies
Gas destructive distillation weightlessness 42%, fixed carbon content 30%, C/Hratio 11；
(2) molding feed coal is pushed into coke oven and carries out coking, control 1200 DEG C of coking temperature, scorch time 24 is small
When, the mixture of the raw gas of spilling, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 550_Nm3/ t dry coal, the amount of the tar are 54kg/t dry coal, the amount 600kg/t dry coal of the byproduct coke, institute
The amount for stating crude benzol is 16kg/t dry coal.In mass, solids carbon content is not less than 70% in coke, and volatile matter content is not more than
3%, partial size is the 10% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 55% of coke gross mass.
Embodiment 8
(1) ub-bituminous coal is crushed and is mixed to form low-order coal raw material with auxiliary agent, then mix shape with 1/3 coking coal of crushing again
At feed coal, feed coal is carried out using tamping machine to make molding firm by ramming, wherein in mass, the addition quality of auxiliary agent is time cigarette
The 5wt% of coal quality, the additional amount of the ub-bituminous coal are the 50wt% of the raw material coal quality, and the G value of the ub-bituminous coal is 15,
Volatile content is 45%, and the hard pitch that the auxiliary agent is 190 DEG C of softening point, the hard pitch is in 850 DEG C of isolation air
Destructive distillation weightlessness 45%, fixed carbon content 28%, C/Hratio 10；
(2) molding feed coal is pushed into coke oven and carries out coking, 950 DEG C of coking temperature of control, scorch time 20 hours,
The mixture of the raw gas overflowed, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 380Nm3/ t dry coal, the amount of the tar are 46kg/t dry coal, and the amount of the byproduct coke is 653kg/t dry coal,
The amount of the crude benzol is 16kg/t dry coal.In mass, solids carbon content is not less than 72% in coke, and volatile matter content is not more than
4%, partial size is the 10% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 55% of coke gross mass.
Embodiment 9
(1) lignite is crushed and is mixed to form low-order coal raw material with auxiliary agent, be then mixed to form again with 1/3 coking coal of crushing
Feed coal carries out feed coal using tamping machine to make molding firm by ramming, wherein in mass, the addition quality of auxiliary agent is lignite matter
The 10wt% of amount, the additional amount of the lignite are the 80wt% of the raw material coal quality, and the G value of the lignite is 20, fugitive constituent
Content is 55%, and the auxiliary agent is the asphalitine that softening point is greater than 110 DEG C, and the asphalitine is lost in 850 DEG C of isolation air destructive distillation
Weigh 45%；
(2) molding feed coal is pushed into coke oven and carries out coking, 850 DEG C of coking temperature of control, scorch time 16 hours,
The mixture of the raw gas overflowed, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 550Nm3/ t dry coal, the amount of the tar are 62kg/t dry coal, and the amount of the byproduct coke is 458kg/t dry coal,
The amount of the crude benzol is 18kg/t dry coal.In mass, solids carbon content is not less than 55% in coke, and volatile matter content is not more than
6%, partial size is the 15% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 60% of coke gross mass.
Embodiment 10
(1) lignite is crushed and is mixed to form low-order coal raw material with auxiliary agent, be then mixed to form again with 1/3 coking coal of crushing
Feed coal carries out feed coal using tamping machine to make molding firm by ramming, wherein in mass, the addition quality of auxiliary agent is lignite matter
The 30wt% of amount, the additional amount of the lignite are the 60wt% of the raw material coal quality, and the G value of the lignite is 20, fugitive constituent
Content is 55%, and the hard pitch that the auxiliary agent is 150 DEG C of softening point, the hard pitch loses in 850 DEG C of isolation air destructive distillation
30% is weighed, carbon content 30%, C/Hratio 8 are fixed；
(2) molding feed coal is pushed into coke oven and carries out coking, 950 DEG C of coking temperature of control, scorch time 24 hours,
The mixture of the raw gas overflowed, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 400Nm3/ t dry coal, the amount of the tar are 48kg/t dry coal, and the amount of the byproduct coke is 635kg/t dry coal,
The amount of the crude benzol is 17kg/t dry coal.In mass, solids carbon content is not less than 75% in coke, and volatile matter content is not more than
4%, partial size is the 20% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 55% of coke gross mass.
Comparative example 1
1/3 coking coal is carried out using tamping machine to make molding firm by ramming, molding feed coal is pushed into coke oven and carries out coking, is controlled
950 DEG C of coking temperature processed, scorch time 24 hours, the mixture of the raw gas of spilling, tar, crude benzol is collected, while obtaining pair
Product coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 365Nm3/ t dry coal, the amount of the tar are 34.9kg/t dry coal, and the amount of the byproduct coke is ton dry coal
677kg/t dry coal, the amount of the crude benzol are 10.6kg/t dry coal.In mass, solids carbon content is not less than 72% in coke, waves
Hair divides content no more than 5%, and partial size is the 60% of coke gross mass in the particle gross mass of 40mm or more after coke screening, partial size
It is the 60% of coke gross mass in the particle gross mass of 25mm or more.
Comparative example 2
(1) lignite is crushed and is mixed to form low-order coal raw material with auxiliary agent, be then mixed to form again with 1/3 coking coal of crushing
Feed coal carries out feed coal using tamping machine to make molding firm by ramming, wherein in mass, the additional amount of the lignite is described
The 60wt% of raw material coal quality, the addition quality of auxiliary agent are the 60wt% of lignite quality, and the G value of the lignite is 20, fugitive constituent
Content is 55%, the asphalitine that the auxiliary agent is 80 DEG C of softening point, and the asphalitine is weightless in 850 DEG C of isolation air destructive distillation
60%；
(2) molding feed coal is pushed into coke oven and carries out coking, 950 DEG C of coking temperature of control, scorch time 24 hours,
The mixture of the raw gas overflowed, tar, crude benzol is collected, while obtaining byproduct coke；
Raw gas, tar are separated using common process, and further separate crude benzol from tar, the obtained raw gas
Amount be 320Nm3/ ton dry coal, the amount of the tar are 44kg/t dry coal, and the amount of the byproduct coke is 870kg/t dry coal,
The amount of the crude benzol is 18kg/t dry coal.In mass, solids carbon content is not less than 58% in coke, and volatile matter content is not more than
4%, partial size is the 15% of coke gross mass in the particle gross mass of 40mm or more after coke screening, of the partial size in 25mm or more
Grain gross mass is the 55% of coke gross mass.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (8)
1. a kind of technique for carrying out coking to the coal raw material containing low-order coal, which is characterized in that
(1) by low-order coal crush and be mixed to form low-order coal raw material with auxiliary agent, then again with the scala media coal of crushing, high-order coal or in
One or more of high-order coal is mixed to form feed coal, and the feed coal is press-formed, in mass, the auxiliary agent
Additional amount be the low order coal quality 5-40wt%, the additional amount of the low-order coal is the 50-80wt% of raw material coal quality；
(2) molding feed coal is pushed into coke oven and carries out coking, control coking temperature is greater than 800 DEG C, and scorch time is not less than
15 hours, the mixture of the raw gas of spilling, tar, crude benzol is collected, while obtaining byproduct coke；
Wherein the auxiliary agent is in the 850 DEG C of isolation coal asphalt or petroleum asphalts of air destructive distillation weightlessness less than 50%, and the coal
The softening point of pitch or asphalt is not less than 120 DEG C.
2. the technique according to claim 1 for carrying out coking to the coal raw material containing low-order coal, which is characterized in that the coal
The softening point of pitch or asphalt is not less than 140 DEG C.
3. the technique according to claim 2 for carrying out coking to the coal raw material containing low-order coal, which is characterized in that the coal
Pitch or asphalt are hard pitch, and in mass, the fixation carbon content of the hard pitch is in 25% or more, C/Hratio
8-11。
4. the technique according to claim 3 for carrying out coking to the coal raw material containing low-order coal, which is characterized in that with quality
Meter, the additional amount of the auxiliary agent are the 10-30wt% of the low order coal quality.
5. the technique according to claim 1 to 4 for carrying out coking to the coal raw material containing low-order coal, which is characterized in that
In mass, the additional amount of the low-order coal is the 50-70wt% of raw material coal quality.
6. the technique according to claim 5 for carrying out coking to the coal raw material containing low-order coal, which is characterized in that described low
For the G value of rank coal less than 50, volatile content is greater than 40%.
7. the technique according to claim 6 for carrying out coking to the coal raw material containing low-order coal, which is characterized in that the step
Suddenly 900-1200 DEG C of coking temperature in (2).
8. the technique according to claim 7 for carrying out coking to the coal raw material containing low-order coal, which is characterized in that the coke
Chemical industry skill carries out in tamping coke furnace, and the feed coal carries out making molding firm by ramming in tamping machine.
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| JP3027084B2 (en) * | 1994-03-29 | 2000-03-27 | 新日本製鐵株式会社 | Method for producing molded coke for metallurgy |
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