CN106062138A

CN106062138A - Coal blend

Info

Publication number: CN106062138A
Application number: CN201580012261.8A
Authority: CN
Inventors: 宍户贵洋; 滨口真基; 菊池直树
Original assignee: Kobe Steel Ltd
Current assignee: Kobe Steel Ltd
Priority date: 2014-03-31
Filing date: 2015-03-19
Publication date: 2016-10-26
Anticipated expiration: 2035-03-19
Also published as: JP6266409B2; JP2015193740A; US20170096603A1; WO2015151847A1; CA2938960A1; CN106062138B; AU2015241616B2; KR20160127096A; AU2015241616A1

Abstract

In order to reduce the cost of coke raw materials, the present invention involves mixing ashless coal, which is a solvent extract of coal, and steam coal in a weight ratio of 1:1 to 1:5 without heating, and producing a coal blend having a Gieseler fluidity of 1.0 (log ddpm) or higher and an average maximum reflectance of 0.75 (%) or higher.

Description

Coal mixing material

Technical field

The present invention relates to coal mixing material ashless coal and the steam coal of the solvent extract as coal mixed.

Background technology

In using the production of iron and steel of blast furnace, the coke that coking coal heats dry distilling is used as reducing agent.Here, be Manufacture the coke of high-quality, need the coke coal blending using the high strong binding coal of caking property as main material.But, bond by force Coal obtains difficulty in the future, it is possible to rapid rise of price.

It is therefore desirable to use inferior raw material (free-burning coal, weakly caking coal, steam coal) is as coke raw material, thus suppress The usage amount of strong binding coal, cuts down the cost of coke raw material.

In patent documentation 1, disclosing the manufacture method of a kind of coke manufacture coking coal, it is by colm and substantially The mixed coal that ashless coal (Ha イパ mono-U one Le: Hyper-coal) without ash is constituted, is heated to the softening temperature of ashless coal The method more than Du thus manufactured.If using this coke manufacture coking coal as coke raw material, then can suppress coke manufacture The usage amount of strong binding coal.

[prior art literature]

[patent documentation]

[patent documentation 1] Japanese Laid-Open 2009-215454 publication

, because inferior raw material low for caking property is concocted merely in coke coal blending, so coke coal blending Caking property reduces, and coke strenth also reduces.Therefore, in generally operation, joined by the increasing of high-quality coking coal and adjust inferior raw material The negative effect that brings of blending, make typicality required by coke coal blending character (volatile matter, average maximum reflectivity, Giseeler fluidity) include suitable scope in and managed.But, in this method, with the increasing of the usage amount of inferior raw material Adding, the usage amount of the strong binding coal of high price is also required to increase, it is impossible to make the cost of coke raw material be cut down.

It addition, practical petroleum bonding material, although there is high-adhesion supplement effect, but volume of production exists system About, it addition, sulphur content is high, can remain in coke.If here, sulphur content contained in iron ore and coke increases, then remaining in ferrum Sulphur content in water also increases, and there is the load to desulphurisation treater sequence and increases this problem.Therefore, in order to avoid this problem, right In the sulphur content putting into blast furnace, the upper limit is set.The character of ferrum is made to deteriorate it addition, understand sulfur.These results suggested that petroleum bonding material is to Jiao The blending amount of charcoal coal blending is with several % as limit.So, because the supplement of caking property exists limitation, institute is so that being blended into coke and using The amount increase of the inferior raw material in coal blending is not easy to.

Summary of the invention

It is an object of the present invention to provide the coal mixing material of a kind of cost that can cut down coke raw material.

The coal mixing material of the present invention, it is characterised in that using ashless coal and the steam coal of the solvent extract as coal, press According to the weight ratio of 1: 1～1: 5, the most heated mix, the Giseeler fluidity of mixed mixed coal be 1.0 (Log ddpm) with On, average maximum reflectivity is more than 0.75 (%).

Coal mixing material according to the present invention, it is possible to cut down the cost of coke raw material.

Accompanying drawing explanation

Fig. 1 is the schematic diagram that ashless coal manufactures equipment.

Detailed description of the invention

Hereinafter, for the mode preferably implemented of the present invention, referring to the drawings while being illustrated.

(composition of coal mixing material)

The coal mixing material of embodiments of the present invention, is by 1: 1～1: 5 by the ashless coal with coal as raw material and steam coal Weight ratio the most heated mix.So-called ashless coal, is the solvent extract of coal, be coal and solvent are mixed and heated and Obtaining slurry, therefrom extraction dissolves in the coal composition of solvent and obtains.

(steam coal)

For the steam coal of the coal mixing material of present embodiment, in Table 1, be belonging to C～F2 coal classification bituminous coal, Ub-bituminous coal and brown coal.That is, the steam coal of present embodiment, be caloric value (dry ash free basis) (kcal/kg) more than 5800 also Coal less than 8400.

[table 1]

Here, caloric value (the dry ash free basis) (kcal/ of JIS (JIS M 1002:1978) defined Kg), calculate based on following formula.

Caloric value (correction dry ash free basis)=caloric value/(100-1.08 × ash-moisture) × 100

It addition, fuel ratio is divided by value obtained by volatile matter with fixed carbon.If here, by steam coal at the indifferent gas of nitrogen etc. Be heated to high temperature in body, then the pendant moiety and/or the bridge portion that constitute the polymeric matrix of steam coal are cut off because of thermal decomposition, The low boiling point component of low molecular weight hydrocarbon etc., CO, H₂Deng occurring, with gas form to the outside release of steam coal particle.With gas Form is discharged into the low boiling point component of these low molecular weight hydrocarbons etc. of the outside of steam coal particle, CO, H₂Deng, referred to as steam coal Volatile matter (VM), represents with butt (dry-base).It addition, so-called fixed carbon, it is not waving among carbon contained in steam coal Send out composition.

Caloric value (dry ash free basis) (kcal/kg) more than 5800 and less than 8400 as bituminous coal, ub-bituminous coal and brown The steam coal of coal, is the coking coal etc. of coke PCI (to the pulverized coal injection of blast furnace), is the coal of boiler electric power, at table 1 In, ratio belongs to the bituminous coal that the coal of B1, B2 divides, i.e. be used for the strong binding coal of coke coking coal, medium partially strong binding coal viscous Knot property is poor.

(ashless coal)

For the ashless coal of the coal mixing material of present embodiment, it it is the slurry obtained by being mixed and heated coal and solvent In, extraction dissolve in the coal composition of solvent and obtain, refer to ash below 5 weight %, preferably below 3 weight %.? This so-called " ash ", is to be allowed to residual inorganic matter when being ashed so that 815 DEG C add hot coal, and this inorganic matter is silicic acid, aluminium oxide, oxygen Change ferrum, Calx, magnesium oxide, alkali metal etc..It addition, ashless coal does not has a bit moisture.

Its mobility of ashless coal, dilatancy are excellent, demonstrate the highest effect as bonding material.Suitably ashless coal be by The Ji Shi mobility examination of Ji Shi plastometer method (Gieseler Plastometer method) based on JIS M8801 defined Testing the high fluidity (log MF) confirmed is more than 4.78 (Log ddpm).It addition, solidification temperature is higher than 450 DEG C also It is suitable as ashless coal.

As the coal of the raw material of ashless coal, it is not particularly limited, the bituminous coal that extraction yield is high may be used, it is possible to use more Cheap colm (ub-bituminous coal, brown coal).Therefore, in the present embodiment, the raw material as ashless coal uses steam coal.With pot Stove coal manufactures ashless coal as raw material, so that the utilization of the steam coal in the manufacture of coal mixing material expands.It addition, as nothing The raw material of culm uses steam coal, can manufacture ashless coal in the place of production of steam coal, and manufacture coal with this ashless coal and steam coal Mixing material, carries out the manufacture being fabricated onto coal mixing material from ashless coal the most at a dass.

(manufacture method of ashless coal)

Here, the manufacture method for ashless coal illustrates.Ashless coal manufacture for the manufacture method of ashless coal sets Standby 100, as it is shown in figure 1, from the upstream side of manufacturing process in order, possess coal bunker 1, solvent tank 2, slurry preparation vessel 3, delivery pump 4, preheater 5, extraction tank 6, gravitation settler 7 and solvent separator 8,9.

The manufacture method of ashless coal has extraction process, separation circuit and ashless coal and obtains operation.Hereinafter, for each operation Illustrate.Further, in the present embodiment, the raw material as ashless coal uses steam coal.

(extraction process)

Extraction process is the slurry obtained by heating Mixture Density Networks and solvent, and extraction (being allowed to be dissolved in solvent) dissolves in solvent The operation of coal composition.This extraction process is implemented by slurry preparation vessel 3, preheater 5 and extraction tank 6 in FIG.

Coal as raw material is put into slurry preparation vessel 3 from coal bunker 1, and puts into molten from solvent tank 2 to slurry preparation vessel 3 Agent.Putting into the coal in slurry preparation vessel 3 and solvent, the machine 3a of being stirred mixes the slurry for being made up of coal and solvent.By The slurry of slurry preparation vessel 3 modulation, by delivery pump 4, is fed into preheater 5 and after being heated to determined temperature, is supplied It is given to extraction tank 6, with blender 6a stirring while extracting so that set point of temperature keeps.Dissolve in as extraction The solvent of the coal composition of solvent, it is possible to be suitable for aromatic solvent (hydrogen supply or the solvent of non-hydrogen supply).

(separation circuit)

Separation circuit is by by the slurry obtained by extraction process, such as, by settling methods, be separated into that be dissolved with can It is dissolved in the solution of the coal composition of solvent and coal composition (solvent insoluble component, such as ash) insoluble in solvent concentrates consolidates The operation of body composition concentrated solution (solvent insoluble component concentrated solution).This separation circuit in FIG, is implemented by gravitation settler 7.By The slurry that extraction process obtains, in gravitation settler 7, under gravity, is separated into the supernatant as solution, and solid Composition concentrated solution.The supernatant on the top of gravitation settler 7, is sent to solvent separator 8, and is deposited to gravitation settler 7 The solid constituent concentrated solution of bottom be sent to solvent separator 9.

(ashless coal acquirement operation)

Ashless coal obtain operation, be from via the isolated solution of separation circuit (supernatant) makes solvent evaporation separate and Obtain the operation of ashless coal (HPC).This ashless coal obtains operation, in FIG, solvent separator 8 implements.Through gravitation settler 7 isolated solution, are fed into solvent separator 8, are separated by evaporation from supernatant at solvent separator 8 internal solvent.

The method separating solvent from solution (supernatant), it is possible to use the general way of distillation, evaporation etc..From supernatant Middle separation solvent, it is possible to obtain being substantially free of the ashless coal (HPC) of ash.

Ashless coal is practically free of ash, shows no sign of moisture, demonstrates more higher caloric value than coking coal.Additionally, as refining It is the quality of particular importance for the raw material of ferrum coke, i.e. softens meltbility (mobility) and be also greatly improved, though burnt Coal does not have softening meltbility, and obtained ashless coal (HPC) also has good softening meltbility.

Further, in solvent separator 9, from the isolated solid constituent concentrated solution of gravitation settler 7 institute, separate solvent, The extract residue (RC, the most residual coal) concentrated containing the solvent insoluble component that ash grades can be obtained.

(coal mixing material)

Then, the coal mixing material for present embodiment illustrates.The above-mentioned inferior raw material containing steam coal is (non- Binding coal, weakly caking coal, steam coal), it is used for strong binding coal and the bad adhesion of medium partially strong binding coal of coke coking coal. Therefore, using inferior raw material as coke raw material use time, need to improve the blending ratio of the strong binding coal in coke coal blending, with It is suitable the character (volatile matter, average maximum reflectivity, Giseeler fluidity) of the typicality required by coke coal blending to be included in Scope.In a word, the usage amount along with the inferior raw material in coke coal blending increases, and needs the usage amount of the strong binding coal of high price Also increase, therefore can not cut down the cost of coke raw material.

It addition, in coke manufactures, carry out is to use practical petroleum bonding material to augment caking property.But, The sulphur content of petroleum bonding material is high, remains in coke, makes the sulphur content comprised in coke increase.On the other hand, it is transfused to blast furnace Sulphur content be restricted.So, the blending amount of the petroleum bonding material in coke coal blending is with several % as limit.Therefore, make The amount increase being blended into the inferior raw material in coke coal blending is not easy to.

Therefore, the coal mixing material of present embodiment, ashless coal and steam coal are pressed the weight ratio of 1: 1～1: 5, more preferably By the weight ratio of 1: 3～1: 5, the most heated mix.Carry out so that such weight ratio does not heat ashless coal and steam coal Mixing, the Giseeler fluidity that thus can make mixed mixed coal is more than 1.0 (Log ddpm), more preferably 1.5 (Log Ddpm) more than.It addition, making the average maximum reflectivity of mixed coal is more than 0.75 (%).Further, the Giseeler fluidity peace of mixed coal All maximum reflectivities look like respectively, and ashless coal contained in mixed coal and the numerical value of steam coal are weighted average value.Also Having, the preferably Giseeler fluidity of mixed coal is less than 4.0 (Log ddpm), more preferably less than 3.8 (Log ddpm).Additionally, it is preferred that it is mixed The average maximum reflectivity of coal is less than 1.2 (%) not, more preferably less than 1.0 (%).Thus, the property of obtained coal mixing material Shape, belongs to the division of B～D in table 2, with general strong binding coal (general strong viscous) or the character etc. of medium partially strong binding coal With.

[table 2]

Here, general strong binding coal (general strong viscous) or the character of medium partially strong binding coal, its volatilization is divided into 20～33 (quality %), average maximum reflectivity is 0.8～1.3 (%), and Giseeler fluidity is 1.5～4.0 (Log ddpm).Further, flat All maximum reflectivities (%), formula based on JIS (JIS M 8816:1992) defined calculates.

As above-mentioned, its mobility of ashless coal, dilatancy are excellent, demonstrate the highest effect as bonding material.Therefore, it is not added with Hot ashless coal and steam coal and mix, it is possible to obtain the mixed of caking property as the strong binding coal with high-quality has Coal.And, by ashless coal and steam coal by 1: 1～1: 5 weight ratio, the most heated and mix, the Ji Shi of mixed mixed coal Fluidity is more than 1.0 (Log ddpm), and average maximum reflectivity is more than 0.75 (%).Thereby, it is possible to obtain with general Strong binding coal (general strong viscous) and medium partially strong binding coal have the coal mixing material of equal character.Use as coke raw material Coal mixing material replaces strong binding coal, it is possible to the usage amount of the strong binding coal in making coke manufacture reduces, and can make coke Increase by the amount of the steam coal comprised in coal blending.It addition, because its sulphur content of ashless coal is as steam coal, so to coke with joining The blending amount of the ashless coal in coal is not from the restriction of sulphur content.Therefore, ashless coal will not heated and steam coal mixes Coal mixing material uses as coke raw material, it is possible to make the amount that can concoct the inferior raw material in coke coal blending increase.By This, it is possible to make the cost of coke raw material reduce.Ashless coal and the mixing of steam coal, it does not utilize heater means to add from outside Heat.It addition, there is also concocted coal itself to have the situation of heat, temperature during mixing about can be in less than 100 DEG C, Less than 60 DEG C etc..

It addition, ashless coal and steam coal, by coarse pulverization when mixing or before mixing.Here, so-called coarse pulverization, refer to pulverize It is below 20mm to particle diameter.Ashless coal and steam coal can be put into pulverizer simultaneously, carry out coarse pulverization without adding Heat and mix, it is also possible to put into pulverizer respectively and respectively after coarse pulverization, then put into coal mixer with suitable mixing ratio, without adding Heat and mix.Further, ashless coal and steam coal are put into pulverizer simultaneously, coarse pulverization while mixing method, Liang Zhegeng The most mixed in together, therefore ashless coal is easily close to around the particle of steam coal.Further, whether the particle diameter of coal exists During the particle diameter of 20mm such as the following checking coal, such as, JIS A 1102 defined sieve test is used.

Ashless coal presents the tendency being easier to pulverizing than steam coal.In general, the easy airborne dust of fine coal.Separately Outward, in general, through fine coal, low-temperature oxidation is easily carried out, it is possible to the spontaneous combustion because of oxidation heat liberation.Therefore, will Ashless coal and steam coal carry out coarse pulverization, the most mixed in together both when mixing, make ashless coal be close to steam coal Around particle.Thus, airborne dust and low-temperature oxidation can be suppressed, it is possible to stably take care of or transport coal mixing material.It addition, Around the particle of the low steam coal of caking property, it is close to the ashless coal that caking property is high, because the bond effect of ashless coal is high, institute So that the caking property of coal mixing material can be improved.

Further, when coal mixing material uses as coke coking coal, by the pulverizer that coke-fired furnace is subsidiary, it is crushed to one As the granularity (particle diameter be the shared ratio of below 3mm be about 80 overall weight %) of coke coal blending.

It addition, as above-mentioned, the coal as the raw material of ashless coal is steam coal.It is the ashless coal of raw material by not heating boiler coal The coal mixing material mixed with steam coal uses as coke raw material, thus enters one by the amount of steam coal contained in coal blending Step increases, therefore, it is possible to make the cost of coke raw material cut down further.It addition, manufacture ashless like this in the place of production of steam coal Coal, manufactures coal mixing material, so from manufacture one gas being fabricated onto coal mixing material of ashless coal with this ashless coal and steam coal Carry out with breathing out into, it is possible to suppression cost of transportation etc., therefore, it is possible to reduce manufacturing cost.

Further, from the manufacture being fabricated onto coal mixing material of ashless coal, all the time when the place of production of steam coal is carried out, preferably will The extract residue obtained as by-product in the manufacture of ashless coal, as fuel and the ashless coal manufacture process in on-the-spot power plant In fuel use.Extract residue as by-product is effectively utilized as fuel, it is possible to reduce the manufacturing cost of ashless coal, enter And the manufacturing cost of coal mixing material can be reduced.

(mixing ratio evaluation)

Then, according to by the one among representational 4 kinds of steam coals A, B, C, D and ashless coal, do not heat and mix In the case of the character of coal mixing material that is contemplated to, the mixing ratio (weight ratio) for ashless coal and steam coal is evaluated. The character of coal mixing material, (divides the property of B～D with the strong binding coal (general strong viscous) of table 2 or the character of medium partially strong binding coal Shape) it is target, making Giseeler fluidity is more than 1.0 (Log ddpm), and average maximum reflectivity is more than 0.75 (%).

First, transport the ashless coal and steam coal manufactured from coal yard or warehouse, put into pulverizer simultaneously, carry out thick Pulverizing makes particle diameter reach below 20mm, does not heats, and mixes with room temperature (about 25 DEG C) state.Or, by ashless coal and Steam coal puts into pulverizer respectively, coarse pulverization and after making particle diameter reach below 20mm, divide in the way of becoming suitable mixing ratio Do not put into coal mixer, mix the most heatedly.Then, calculate for the one among representational 4 kinds of steam coals A, B, C, D and That ashless coal is envisioned when not heating and mix, as assay value (volatile matter, averagely maximum of the typicality of coke coking coal Reflectance, Giseeler fluidity), the mixing ratio for the character as target is evaluated.Ashless coal and 4 kinds of steam coal A, B, C, The character of D is respectively displayed in table 3.

[table 3]

First, make mixing ratio (weight ratio) with 6 phase change between 1: 1～1: 20, do not heat ashless coal and steam coal A And mix, evaluate character.Its result shows in table 4.

[table 4]

When mixing ratio (weight ratio) is 1: 1, average maximum reflectivity and Giseeler fluidity are in target zone, but volatile matter Higher than the higher limit as target zone 33%.When mixing ratio (weight ratio) is 1: 3～1: 5, Giseeler fluidity is at target model In enclosing, but volatile matter is higher than 33% of the higher limit as target zone, and average maximum reflectivity is less than as target zone The 0.8% of lower limit.When mixing ratio (weight ratio) is 1: 8, volatile matter is higher than 33% of the higher limit as target zone, averagely Maximum reflectivity and Giseeler fluidity are less than the lower limit of target zone.When mixing ratio (weight ratio) is 1: 10～1: 20, volatilization Divide in target zone, but average maximum reflectivity and Giseeler fluidity are less than the lower limit of target zone.By judging above, 1: The mixing ratio (weight ratio) of 1 is good.

Then, make mixing ratio (weight ratio) with 6 phase change between 1: 1～1: 20, do not heat ashless coal and steam coal B Mixed, evaluated character.Its result shows in table 5.

[table 5]

When mixing ratio (weight ratio) is 1: 1, average maximum reflectivity and Giseeler fluidity are in target zone, but volatile matter Higher than the higher limit as target zone 33%.When mixing ratio (weight ratio) is 1: 3, volatile matter, average maximum reflectivity, base Value in all target zones of family name's fluidity.When mixing ratio (weight ratio) is 1: 5～1: 20, volatile matter and average maximum reflection Rate is the value in target zone, but Giseeler fluidity is less than 1.5 (Log ddpm) of the lower limit as target zone.But, When mixing ratio (weight ratio) is 1: 5, Giseeler fluidity is at more than 1.0 (Log ddpm).By judging above, the mixing ratio of 1: 3 (weight ratio) is optimal, and the mixing ratio (weight ratio) of 1: 1 and 1: 5 is good.

Then, make mixing ratio (weight ratio) with 6 phase change between 1: 1～1: 20, do not heat ashless coal and steam coal C Mixed, evaluated character.Its result shows in table 6.

[table 6]

When mixing ratio (weight ratio) is 1: 1, average maximum reflectivity and Giseeler fluidity are in target zone, but volatile matter Higher than the higher limit as target zone 33%.When mixing ratio (weight ratio) is 1: 3～1: 20, Giseeler fluidity is at target model In enclosing, but volatile matter is higher than 33% of the higher limit as target zone, and average maximum reflectivity is less than as target zone The 0.8% of lower limit.But, when mixing ratio (weight ratio) is 1: 3 and 1: 5, average maximum reflectivity is at more than 0.75 (%).Root Upper judgement according to this, the mixing ratio (weight ratio) of 1: 1～1: 5 is good.

It follows that make mixing ratio (weight ratio) with 6 phase change between 1: 1～1: 20, do not heat ashless coal and boiler Coal D is mixed, and evaluates character.Its result shows in table 7.

[table 7]

When mixing ratio (weight ratio) is 1: 1, average maximum reflectivity and Giseeler fluidity are in target zone, but volatile matter Higher than the higher limit as target zone 33%.When mixing ratio (weight ratio) is 1: 3～1: 5, volatile matter, average maximum reflection Value in all target zones of rate, Giseeler fluidity.When mixing ratio (weight ratio) is 1: 8～1: 20, volatile matter and averagely Big reflectance is in target zone, but Giseeler fluidity is less than 1.5 (Log ddpm) of the lower limit as target zone.But It is that, when mixing ratio (weight ratio) is 1: 8 and 1: 10, Giseeler fluidity is more than 1.0 (Log ddpm).Judge according to above, 1: 1 ～the mixing ratio (weight ratio) of 1: 5 is optimal, the mixing ratio (weight ratio) of 1: 8 and 1: 10 is good.

By judging above, the ashless coal that character is equal with general strong binding coal (general strong viscous) or medium partially strong binding coal With the mixing ratio of steam coal, with the mass ratio range of 1: 1～1: 5, the weight ratio of more preferably 1: 3～1: 5.

Further, above-mentioned evaluation, it carries out being to make the weight ratio ashless coal of steam coal many, makes the weight ratio boiler of ashless coal When coal is many, Giseeler fluidity and volatile matter increase, and become superfluous, the character of breakaway far away, it is impossible to expect to mix as coal The effect of material.

(effect)

As previously discussed, in the present embodiment, ashless coal and steam coal are pressed the weight ratio of 1: 1～1: 5, the most heated Mixing and as coal mixing material.Its mobility of ashless coal, dilatancy are excellent, demonstrate the highest effect as bonding material.Cause This, the most heated mixing ashless coal and steam coal, it is possible to obtain the mixed coal of caking property as the strong binding coal with high-quality has. And, make ashless coal and steam coal by the weight ratio of 1: 1～1: 5, do not heat and mix, the Giseeler fluidity of mixed mixed coal Being more than 1.0 (Log ddpm), average maximum reflectivity is more than 0.75 (%).Thereby, it is possible to obtain and general strong bonding Coal and medium partially strong binding coal have the coal mixing material of equal character.Using this coal mixing material replace strong binding coal and as Coke raw material uses, it is possible to the usage amount of the strong binding coal in minimizing coke manufacture, and can make to comprise in coke coal blending Steam coal amount increase.Specifically, the blending amount of the coal mixing material in coke coal blending, coke coal blending can be accounted for 10 overall mass %～50 mass %, preferably 20 mass %～30 mass %.Ashless coal is used separately as adding material Time, need to adjust appropriate amount according to the character of coal blending, but the coal mixing material of the present invention, the appropriate amount of coal and ashless coal is in advance Concocted, therefore can easily be added blending appropriate amount for coke coal blending.It addition, its sulphur content of ashless coal is same with steam coal Sample, therefore the blending amount of the ashless coal in coke coal blending is not from the restriction of sulphur content.Therefore, will not heat ashless coal and The coal mixing material that steam coal mixes uses as coke raw material, it is possible to make to concoct the poor quality in coke coal blending The amount of raw material increases.Thereby, it is possible to cut down the cost of coke raw material.

It addition, ashless coal and steam coal are by coarse pulverization.Ashless coal has easier pulverized tendency than steam coal.General next Say, through the easy airborne dust of fine coal.It addition, in general, through fine coal, low-temperature oxidation is easily carried out, and therefore having can Can the spontaneous combustion because of oxidation heat liberation.Therefore, by ashless coal and steam coal coarse pulverization, the most mixed in together both during mixing, make Ashless coal is close to around the particle of steam coal.Thus, airborne dust and low-temperature oxidation are inhibited, it is possible to stably take care of Or transport coal mixing material.It addition, around the particle of the low steam coal of caking property, be close to the ashless coal that caking property is high, Because the bond effect of ashless coal is high, it is possible to improve the caking property of coal mixing material.

It addition, the coal as the raw material of ashless coal is steam coal.By ashless coal and boiler that not heating boiler coal is raw material The coal mixing material that coal mixes uses as coke raw material, and the amount of the steam coal thus comprised in coke coal blending is further Increase, therefore, it is possible to reduce the cost of coke raw material further.It addition, manufacture ashless coal like this in the place of production of steam coal, use This ashless coal and steam coal manufacture coal mixing material, enter at a dass from the manufacture being fabricated onto coal mixing material of ashless coal OK, it is possible to suppression cost of transportation etc., therefore, it is possible to cut down manufacturing cost.

(modified embodiment of the present embodiment)

This concludes the description of embodiments of the present invention, but be only to illustrate concrete example, be not particularly limited to the present invention, tool The composition etc. of body, can suitably be designed change.It addition, the effect described in mode of the enforcement of invention and effect, Bu Guoshi Enumerating the optimal effect and effect produced by the present invention, the effect of the present invention and effect, not by the side of enforcement of the present invention Content described in formula limits.

The application is based on Japanese patent application filed in 31 days March in 2014 (patent application 2014-072439), its content In this as with reference to quoting.

[industrial applicability]

The coal mixing material of the present invention, the coking coal as coke manufacture is useful, it is possible to be manufactured inexpensively.

[symbol description]

1 coal bunker

2 solvent tanks

3 slurry preparation vessels

3a blender

4 delivery pumps

5 preheaters

6 extraction tanks

6a blender

7 gravitation settlers

8,9 solvent separator

100 ashless coals manufacture equipment

Claims

1. a coal mixing material, it is characterised in that using the ashless coal of the solvent extract as coal and steam coal by 1: 1～1: The weight ratio of 5 is the most heated to be mixed, and the Giseeler fluidity of mixed mixed coal is more than 1.0 (Log ddpm), Big reflectance is more than 0.75 (%).

Coal mixing material the most according to claim 1, it is characterised in that for described ashless coal and described steam coal by coarse powder Broken.

Coal mixing material the most according to claim 1 and 2, it is characterised in that as described in the raw material of described ashless coal Coal is steam coal.