CN104419434B - Method for manufacturing semicoke for sintering - Google Patents
Method for manufacturing semicoke for sintering Download PDFInfo
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- CN104419434B CN104419434B CN201310398284.XA CN201310398284A CN104419434B CN 104419434 B CN104419434 B CN 104419434B CN 201310398284 A CN201310398284 A CN 201310398284A CN 104419434 B CN104419434 B CN 104419434B
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- semicoke
- sintering
- coal
- iron
- mass percent
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- 238000005245 sintering Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052742 iron Inorganic materials 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003245 coal Substances 0.000 claims abstract description 21
- 239000003077 lignite Substances 0.000 claims abstract description 17
- 239000002802 bituminous coal Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000010703 silicon Substances 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims description 12
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- 239000007767 bonding agent Substances 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 19
- 239000000571 coke Substances 0.000 abstract description 15
- 239000002994 raw material Substances 0.000 abstract description 6
- 230000009257 reactivity Effects 0.000 abstract description 5
- 238000005406 washing Methods 0.000 abstract description 5
- 238000000197 pyrolysis Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 239000003415 peat Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 2
- 239000003830 anthracite Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 235000009781 Myrtillocactus geometrizans Nutrition 0.000 description 1
- 240000009125 Myrtillocactus geometrizans Species 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000011305 binder pitch Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a production method of semicoke for sintering, which comprises the following steps: 85-90% of low-quality coal, 4-10% of high-iron low-silicon iron ore powder and 4-8% of binder, uniformly mixing the mixture, pressing and molding, performing dry distillation at 700-850 ℃ for 7-15 hours, and performing dense medium washing under the condition that the specific gravity of the dense medium is 1.3-1.4 to obtain semicoke for sintering. The semicoke produced by the invention has the advantages of iron coke and semicoke, has strong chemical reactivity, can optimize the granularity structure of sintering fuel by mixing the semicoke and the coke powder, and improves the air permeability of a sintering material layer. The raw materials are inferior peat, lignite and high volatile bituminous coal, thus expanding the application range of the fuel in the metallurgical industry and reducing the cost of the sintering fuel.
Description
Technical field
The invention belongs to smelt iron crude fuel production technical field, it is related to the production technology of sintering fuel, more particularly to
A kind of production method of sintering semicoke.
Background technology
Sintering solid fuel used is coke powder or anthracite, and it enters factory's fuel granularity and is usually 0mm～25mm, but agglomerant
Skill is that 0～3 ㎜ should account for more than 85% to its granularity requirements.Because fuel coarseness proportion is big, make combustion reaction slack-off, no
Can be synchronous with the mineralising reaction in sintering process, amount of liquid phase in sintering process will be caused to reduce, decline sinter quality.Therefore
Need to crush fuel before SINTERING PRODUCTION, both required coke powder and coal dust<3mm grades should account for more than 85%, could meet sintering
The needs of production, this causes the cost of fine grinding fuel to increase.
Semicoke (semi-coke) is commonly called as semi-coke, gains the name having very short blue flame when it burns, and it is mud coal, brown
The solid product that the Jing low temperature such as bituminous coal of coal and high volatile (500 ~ 700 DEG C) dry distilling is obtained.Semicoke has high chemistry living
The characteristic such as property, high specific resistance, high fixed carbon, low ash, low-sulfur, low-phosphorous, low alchlor, but its strength ratio high-temperature coke is poor, depending on
Density and true density are also low than high-temperature coke.Semicoke volatile matter content is different because dry distilling final temperature is different, and generally 1 0～20%.
Half reactivity of coke typically uses the mensuration measure of critical air air blast.Measured value is less, and reactivity is bigger.The critical air blow rate required of semicoke
Value average out to 0.017L/min, and high-temperature coke is then up to 0.057L/min.Due to the difference of the aspects such as raw material and technique, semicoke
The market price far below general coke price, the such as market price of secondary metallurgical is in 2200 yuan/t or so, and semicoke
In 750 yuan/t or so, the relatively low market price makes semicoke product possess the higher market competitiveness.
The capital equipment of semicoke production is gas retort, and the basic demand of its production is that dry distillation efficiency is high, equal to material heating
Even, available raw material types width, feed coal particle size range is big, and the secondary pyrolysises of volatile matter are little, and operating process is convenient and reliable
Deng.Gas retort can be divided into 2 kinds of external-heat and internal heat type by heat-supplying mode.The heat of external-heat stove supply coal charge is passed by furnace wall outside
Enter, because dry distilling room and combustor are not communicated with, dry distilling volatile matter is not mixed with combustion product gases, it is ensured that volatility product not by
Dilution, but because coal charge heating is uneven, cause semicoke quality uneven；Additionally, too high humidity province exacerbates the two of volatility product
Secondary pyrolysis, reduces tar yield.Internal heat type stove imparts heat to coal charge by heat carrier, because it has heating equal compared with external-heat stove
The advantages of even, thermal efficiency is high, furnace binding is simple and be used widely.
Sinter high to the granularity requirements of fuel, reduce available resources, and need using it is front fuel is carried out it is levigate
Process, make the production process time long, increased production cost.The characteristics of making full use of half reactivity of coke high, and while reduce burning
In knot fuel<3mm grade proportions, not only can reduce fuel and fuel fine grinding cost, improve sinter quality, can also make
The colms such as mud coal, brown coal and high-volatile anthracite are applied to sintering, have widened the scope of metallurgical coal.
The burning that paper " thermogravimetric Analysis of coal-char combustion characteristic " passes through thermobalance experimental study semicoke is special
Property, the impact result of the test for having investigated coal and preparation temperature Semicoke Combustion Properties shows：Coal is different, obtained semicoke
Combustion characteristics is different；Identical coal is obtained semicoke, raises with preparation temperature, and semicoke ignition temperature rises, and combustive activation can increase,
Combustion reaction activity is reduced.
Chinese patent 200510048752.6 discloses a kind of method that use low-quality brown coal produce high-quality semicoke：It is brown with low-quality
Coal is raw material, and by dry distilling lignite semi-coke is obtained, and then obtains high-quality semicoke by dense media washing.It is characterized in that brown with low-quality
Coal is raw material, and in adding reactor, in 800 DEG C of temperature, dry distilling under the conditions of 10 hours time obtains lignite semi-coke；Now brown coal half
Charred ashes is divided into 40% ~ 50%, fugitive constituent 12%, fixed carbon 53%, and then heating quantity of bomb cylinder about 18 ~ 20MJ/Kg is in medium proportion
Dense media gravity treatment is carried out under the conditions of 1.25, ash 13%, fugitive constituent 12%, fixed carbon 83%, heating quantity of bomb cylinder about 25 ~ 30MJ/ is obtained
The high-quality semicoke of Kg and the low-quality semicoke of remainder.The high-quality semicoke of production has fixed carbon content high, caloric value height, ash
Divide low feature.But the semicoke mechanical strength of the method production is poor, it is easy to which efflorescence, bed permeability is bad during for sintering.
The content of the invention
In order to overcome drawbacks described above, the present invention to propose a kind of production method of sintering semicoke, a kind of chemistry is produced living
Property, cost than coke low new semicoke granule stronger than coke, optimize sintering fuel Granularity Structure, widening metallurgical industry fuel makes
Use scope.
For achieving the above object, the present invention takes technical scheme below：
A kind of production method of sintering semicoke, it is characterised in that following component constitutes by mass percentage compound：It is bad
Matter coal 85% ~ 90%, high iron low silicon Iron Ore Powder 4% ~ 10%, binding agent 4% ~ 8% will be compressing after compound mix homogeneously, 700
DEG C ~ 850 DEG C of dry distilling 7 ~ 15 hours, and it is then to carry out dense media washing under conditions of 1.3 ~ 1.4 in dense media proportion, sintered
Use semicoke.
In compound, colm be mud coal, brown coal and high-volatile bituminous coal in one kind and more than；Binding agent be Colophonium,
Any one in tar slag, cement and waterglass.
High iron low silicon Iron Ore Powder, full weight of iron percentage ratio is TFe ＞ 64%, SiO2Mass percent is SiO2＜ 4%.
The semicoke produced, ash mass percent is 12% ~ 14%, and volatile matters mass percent is 10% ~ 18%, fixed carbon
Mass percent is 70% ~ 85%.
High-volatile bituminous coal, volatile matters mass percent Vad＞ 27%.
The present invention produces semicoke, has the advantages that iron coke and semicoke, and chemical reactivity is strong, and semicoke mixes with coke powder to be made
With, the Granularity Structure of sintering fuel can be optimized, improve permeability of sintering material bed.It is raw materials used for mud coal inferior, brown coal and
The bituminous coal of high volatile, has expanded metallurgical industry fuel use range, reduces sintering fuel cost.
Specific embodiment
Below the invention will be further described：
Embodiment 1：
Compound is constituted with brown coal, high iron low silicon Iron Ore Powder and binder pitch, wherein brown coal mass fraction is 88%, high
Ferrum low-silicon iron powdered ore quality fraction 7%, mass fraction of asphalt is 5%, by compound mix homogeneously after, with being pressed into roll-in ball machine
Type, with vertical interior-heat stove dry distilling 10 hours under the conditions of 760 DEG C, then carries out dense media washing, and it is 12.4% to obtain ash, volatilization
It is divided into 10%, fixed carbon content is 77.6% sintering semicoke.The high iron low silicon Iron Ore Powder wherein used and brown coal composition such as He of table 1
Shown in table 2.
The high iron low silicon Iron Ore Powder chemical composition of table 1/%
The brown coal Industrial Analysis of table 2/%
In the case where iron charge is consistent, test is sintered with refuelling by following scheme：（1）75% coke powder（In coke powder<
3mm ratios 50%）With addition of 25% semicoke；（2）65% coke powder（In coke powder<3mm ratios 40%）With addition of 35% semicoke, result of the test such as table 3
It is shown.
The sintering experiment result of table 3
Embodiment 2：
With colm（Brown coal and bituminous coal）, high iron low silicon Iron Ore Powder and binder coke dregs of fat composition compound, wherein inferior
Coal mass fraction is 90%, and high iron low silicon Iron Ore Powder mass fraction 5%, tar slag mass fraction is 5%, by compound mix homogeneously
Afterwards, with compressing to roll-in ball machine, with vertical interior-heat stove dry distilling 12 hours under the conditions of 800 DEG C, then carry out dense media and wash
Choosing, it is 11.6% to obtain ash, and volatilization is divided into 8%, and fixed carbon content is 80.4% sintering semicoke, wherein high iron low silicon ferrum used
As shown in table 1, brown coal used and bituminous coal composition are as shown in table 4 for breeze.
4 proximate analysis of coals of table/%
In the case where iron charge is consistent, test is sintered with refuelling by following scheme：（1）75% coke powder（In coal dust<
3mm ratios 50%）With addition of 25% semicoke；（2）65% coke powder（In coke powder<3mm ratios 40%）With addition of 35% semicoke, result of the test such as table 5
It is shown.
The sintering experiment result of table 5
Embodiment 3：
With colm（Mud coal, brown coal and bituminous coal）, high iron low silicon Iron Ore Powder and water glass of binder composition compound, wherein
Colm mass fraction is 85%, high iron low silicon Iron Ore Powder mass fraction 8%, and mass fraction of asphalt is 7%, and compound mixing is equal
After even, with compressing to roll-in ball machine, with vertical interior-heat stove dry distilling 13 hours under the conditions of 820 DEG C, dense media is then carried out
Washing, it is 11.2% to obtain ash, and volatilization is divided into 6%, and fixed carbon content is 82.8% sintering semicoke, wherein high iron low silicon used
As shown in table 1, brown coal used and bituminous coal composition are as shown in table 6 for Iron Ore Powder.
6 proximate analysis of coals of table/%
In the case where iron charge is consistent, test is sintered with refuelling by following scheme：（1）75% coke powder（In coal dust<
3mm ratios 50%）With addition of 25% semicoke；（2）65% coke powder（In coke powder<3mm ratios 40%）With addition of 35% semicoke, result of the test such as table 7
It is shown.
The sintering experiment result of table 7
Claims (1)
1. a kind of production method of sintering semicoke, it is characterised in that following component constitutes by mass percentage compound：It is inferior
Coal 85%～90%, high iron low silicon Iron Ore Powder 4%～10%, binding agent 5%～7% will be pressed into after compound mix homogeneously
Type, is then to carry out dense media under conditions of 1.3～1.4 to wash in dense media proportion in 700 DEG C～800 DEG C dry distilling 7～12 hours
Choosing, obtains sintering semicoke；In compound, colm be mud coal, brown coal and high-volatile bituminous coal in one kind and more than；Bonding
Agent is any one in Colophonium, tar slag, cement and waterglass；The semicoke produced, ash mass percent be 12%～
14%, volatile matters mass percent is 10%～18%, and fixed carbon mass percent is 70%～85%；The high iron low silicon ferrum
Breeze, full weight of iron percentage ratio is TFe ＞ 64%, SiO2Mass percent is SiO2＜ 4%；The high-volatile bituminous coal, volatilization
Divide mass percent Vad＞ 27%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310398284.XA CN104419434B (en) | 2013-09-05 | 2013-09-05 | Method for manufacturing semicoke for sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310398284.XA CN104419434B (en) | 2013-09-05 | 2013-09-05 | Method for manufacturing semicoke for sintering |
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| Publication Number | Publication Date |
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| CN104419434A CN104419434A (en) | 2015-03-18 |
| CN104419434B true CN104419434B (en) | 2017-04-26 |
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| CN201310398284.XA Active CN104419434B (en) | 2013-09-05 | 2013-09-05 | Method for manufacturing semicoke for sintering |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524673A (en) * | 2015-12-24 | 2016-04-27 | 四川德胜集团钒钛有限公司 | Sintering fuel and use method thereof |
| CN106635067A (en) * | 2016-11-24 | 2017-05-10 | 武汉科思瑞迪科技有限公司 | Shaft furnace process for producing iron coke |
| JP7327293B2 (en) * | 2019-06-27 | 2023-08-16 | Ｊｆｅスチール株式会社 | Method for producing molding for ferro-coke and method for producing ferro-coke |
| CN114231330B (en) * | 2022-01-13 | 2022-11-18 | 鞍钢股份有限公司 | High-calorific-value iron powder composite fuel and preparation method thereof |
| CN115029169A (en) * | 2022-04-28 | 2022-09-09 | 鞍钢股份有限公司 | Preparation method of sintered solid fuel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850942A (en) * | 2006-05-26 | 2006-10-25 | 中国科学院山西煤炭化学研究所 | Method for preparing formed coke by adding adhesive using weak binding coal as main raw material |
| CN1869158A (en) * | 2005-12-27 | 2006-11-29 | 云南冶金集团总公司技术中心 | Method of producing high quality semicoke using low grade brown coal |
| EP2612894A1 (en) * | 2010-09-01 | 2013-07-10 | JFE Steel Corporation | Metallurgical coke production method |
-
2013
- 2013-09-05 CN CN201310398284.XA patent/CN104419434B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1869158A (en) * | 2005-12-27 | 2006-11-29 | 云南冶金集团总公司技术中心 | Method of producing high quality semicoke using low grade brown coal |
| CN1850942A (en) * | 2006-05-26 | 2006-10-25 | 中国科学院山西煤炭化学研究所 | Method for preparing formed coke by adding adhesive using weak binding coal as main raw material |
| EP2612894A1 (en) * | 2010-09-01 | 2013-07-10 | JFE Steel Corporation | Metallurgical coke production method |
Non-Patent Citations (1)
| Title |
|---|
| 云南褐煤非燃料利用-褐煤成型半焦制备研究;陈雯等;《中国工程科学》;20050930;第7卷;第354-356页 * |
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