CN110295260A - The device and method of efficient blowing Ramsbottom carbon powder - Google Patents
The device and method of efficient blowing Ramsbottom carbon powder Download PDFInfo
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- CN110295260A CN110295260A CN201910615765.9A CN201910615765A CN110295260A CN 110295260 A CN110295260 A CN 110295260A CN 201910615765 A CN201910615765 A CN 201910615765A CN 110295260 A CN110295260 A CN 110295260A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
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Abstract
The device of the efficient blowing Ramsbottom carbon powder of one kind of the invention, comprising: pan feeding belt, supplied materials elevator, high-pressure roller mill, vibrating screen, closed circuit finished product collection device and open circuit finished product collection device；Wherein, the pan feeding belt is connected to the supplied materials elevator, the supplied materials elevator is connected to the high-pressure roller mill, the high-pressure roller mill is connected to the vibrating screen, and the vibrating screen is connected to the closed circuit finished product collection device, the open circuit finished product collection device and the pan feeding belt respectively.The device of efficient blowing Ramsbottom carbon powder of the invention improves semi-coke industry grindability energy, eliminates the influence to medium-speed pulverizer unit-hour output, improves semi-coke and uses accounting and blast fumance efficiency；The corner angle sharpness for reducing semi-coke particles alleviates its abrasion during conveying, blowing to coal spraying pipeline and spray gun, improves service life of equipment.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of device of efficient blast furnace blowing Ramsbottom carbon powder and side
Method.
Background technique
In blast furnace ironmaking field, the application of pulverized coal injection into blast furna Technique Popularizing has achieved huge economic benefit and has obtained wide
General approval.With domestic steel production capacity increasingly increase and blast-furnace coal powder injection key technology be constantly progressive and perfect, city
The demand of injection coal is gradually expanded in field, deteriorates in particular with the increasingly deficient and quality of Chinese high-quality anthracite resource,
Pulverized coal injection into blast furna is increasingly improved in the influence of smelting iron and steel process procedure.
Blast furnace blowing raw material in China's mainly has anthracite, low-volatite bituminous coal (meager coal and meager lean coal), high volatile at present
Three kinds of bituminous coal (mainly jet coal, not glutinous, weakly caking coal, part bottle coal).Currently, industrially this 3 type moulded coal is mostly used to match greatly
Blast furnace blowing feed stock for blast furnace is used as after coal.The stock number of China's high-volatile bituminous coal is more, high-quality anthracite relative shortage, with
Anthracitic to consume year by year, resource provisioning is increasingly nervous, and price also gradually rises.On the other hand, the requirement of national environmental protection
It is being continuously improved, on October 22nd, 2016, national environmental protection portion has formally issued " pollution that caused by coal burning process for comprehensively treating guide
(on probation) ", clean energy resource substitution, fat coal replacement, energy saving and environment friendly coal stove, central heating, building are specified in guide
5 seed types such as energy conservation.Wherein in " fat coal replacement ", it is desirable that " rich coal resources, economic condition are preferable and seriously polluted
Area should preferentially select the high-quality anthracite, moulded coal, semi-coke of low-sulfur low volatile ".In order to seek anthracitic substitute, about
Semi-coke (semicoke) more concerns have been obtained into as coal injection raw material.Semi-coke is since high with fixed carbon, specific resistance is high, changes
Activity is high, low containing ash, aluminium is low, the low characteristic low with phosphorus of sulphur is formally included in fat coal scope by State Ministry of Environmental Protection and is pushed away
Extensively, to administer fired coal combustion pollution.Therefore, semi-coke has theoretically had been provided with instead of coke (metallurgical coke) being widely used in
The basis of the industries such as work, smelting, gas making.But in China's semi-coke, there is no large-scale applications in blast furnace blowing at present, only
Tentative in individual enterprises to come into operation, this mainly exists during using semi-coke to carry out powder processed blowing as raw material
Distinct issues, be mainly manifested in semi-coke substitution anthracite blowing ratio continuous improvement, Coal Grinding System of Pci
Because medium-speed pulverizer unit-hour output reduction (not being able to satisfy blast fumance) occurs in the grindability difference of semi-coke, the increase of cinder amount (is cigarette
4-5 times of coal anthracite mixed coal powder), coal spraying pipeline and spray gun service life the problems such as reducing.Cause the main of above-mentioned phenomenon
Reason is that the Kazakhstan of semi-coke and bituminous coal can grind that difference of coefficients is larger (semi-coke 40-45, bituminous coal 60-70), and semi-coke is difficult to grind
It is broken, there is the situation that bituminous coal has reached granularity requirements and semi-coke particles are still larger, cause milling efficiency low, while is a large amount of difficult
It is discharged with the thick and stiff semi-coke particles ground from the cinder cleaning hole of medium-speed pulverizer lower part, influences coal dust formulated component, waste raw material and promoted
Production cost.
It is improved it would therefore be highly desirable to prepare blast furnace blowing as raw material to currently used semi-coke with semi-coke technique, to change
It is apt to its industrial grindability energy, improves production efficiency, realizes that blast furnace 100% is blown the industrial application of semi-coke.
Summary of the invention
An object of the present invention is to provide a kind of devices of efficient blowing Ramsbottom carbon powder.
The device of the efficient blowing Ramsbottom carbon powder of one kind of the invention, comprising: pan feeding belt, supplied materials elevator, high pressure roller
Grinding machine, vibrating screen, closed circuit finished product collection device and open circuit finished product collection device；Wherein, the pan feeding belt is mentioned with the supplied materials
The connection of the machine of liter, the supplied materials elevator are connected to the high-pressure roller mill, and the high-pressure roller mill is connected to the vibrating screen, institute
Vibrating screen is stated to be connected to the closed circuit finished product collection device, the open circuit finished product collection device and the pan feeding belt respectively.
The device of efficient blowing Ramsbottom carbon powder of the invention improves semi-coke industry grindability energy, eliminates to middling speed
The influence of coal pulverizer unit-hour output improves semi-coke and uses accounting and blast fumance efficiency；The corner angle for reducing semi-coke particles are sharp
Sharp degree alleviates its abrasion during conveying, blowing to coal spraying pipeline and spray gun, improves service life of equipment.
It is another object of the present invention to the methods for proposing efficiently to be blown Ramsbottom carbon powder using the device, including such as
Lower step: raw material is passed through in the pan feeding belt, and the raw material is then passed through the high pressure by the supplied materials elevator
In roller mill, then by adjusting the preset discharging-material size of big minor adjustment of the roll gap gap of the high-pressure roller mill, institute is then used
It states open circuit finished product collection device and collects the raw material, or the raw material is passed through the vibrating screen and is sieved, by described
Closed circuit finished product collection device collects the raw material of pre-set dimension, and out-of-size raw material is passed through the pan feeding belt.
Further, the partial size of the raw material is not more than 35mm.
Another object of the present invention is the preparation method for proposing the efficient blowing Ramsbottom carbon powder in field of metallurgy
In application.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the device of efficient blowing Ramsbottom carbon powder；
Fig. 2 a is the Ramsbottom carbon powder for making to be obtained by the present invention；
Fig. 2 b is the Ramsbottom carbon powder that method of the invention is not used and obtains；
Fig. 3 is the mixed coal powder microstructure form obtained using the method for the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Embodiment 1
As shown in Figure 1, embodiment 1 proposes a kind of device of efficient blowing Ramsbottom carbon powder, comprising: pan feeding belt 110,
Supplied materials elevator 120, high-pressure roller mill 130, vibrating screen 140, closed circuit finished product collection device 150 and open circuit finished product collection device
160.Wherein, the pan feeding belt 110 is connected to the supplied materials elevator 120, the supplied materials elevator 120 and the high pressure roller
Grinding machine 130 is connected to, and the high-pressure roller mill 130 is connected to the vibrating screen 140, the vibrating screen 140 respectively with it is described closed circuit
Finished product collection device 150, the open circuit finished product collection device 160 are connected to the pan feeding belt 110.
The device of efficient blowing Ramsbottom carbon powder of the invention improves semi-coke industry grindability energy, eliminates to middling speed
The influence of coal pulverizer unit-hour output improves semi-coke and uses accounting and blast fumance efficiency；The corner angle for reducing semi-coke particles are sharp
Sharp degree alleviates its abrasion during conveying, blowing to coal spraying pipeline and spray gun, improves service life of equipment.
Embodiment 2
Embodiment 2 proposes a kind of method for being efficiently blown Ramsbottom carbon powder using the device, include the following steps: by
Raw material of the partial size no more than 35mm is passed through in the pan feeding belt 110, then passes through the supplied materials elevator 120 for the raw material
It is passed through in the high-pressure roller mill 130, it is then preset by adjusting the big minor adjustment of the roll gap gap of the high-pressure roller mill 130
Then discharging-material size collects the raw material with the open circuit finished product collection device 160, or the raw material is passed through the vibration
Sieve 140 is sieved, and the raw material of pre-set dimension is collected by the closed circuit finished product collection device 150, and will be out-of-size
Raw material is passed through the pan feeding belt 110.
The method of the efficient blowing Ramsbottom carbon powder of embodiment 2 is to carry out individually before medium-speed pulverizer carries out final powder processed to semi-coke
Extruding powder uses high pressure roller mill machine equipment (as shown in Figure 1) in the technical process for carrying out squeezing powder processed to semi-coke, wherein high
Pressure roller grinding machine is crushed semi-coke, inside broken particle can residual fraction crackle, these underbead cracks there are advantageous
It is further crushed in bulky grain, grinding energy can be reduced, improve yield, while can produce a certain number of ultra-fine grains.It is logical
Milling efficiency can be effectively improved by crossing high-pressure roller mill, improve the industrial grindability energy of semi-coke.
Embodiment 3
Using particle size range in the raw material (as shown in table 1) of 1.1mm-12mm, moisture content of the raw material 20% uses the present invention
The technique carries out closed circuit processing, and high-pressure roller mill roll gap is set as 5mm, and pressure is set as 5MPa, and working speed chooses 150r/
Min, the product grading after processing are as shown in table 2.
The granularmetric composition of 1 raw material of table
| Granularity/mm | Tail over weight/g | Tail over content/g | It is accumulative to tail over content/% | Accumulative throughput/% |
| 10 | 18.89 | 11.33 | 11.33 | 88.67 |
| 8 | 18.66 | 11.19 | 22.52 | 77.48 |
| 5 | 23.73 | 14.23 | 36.75 | 63.22 |
| 3 | 67.64 | 40.57 | 77.32 | 22.68 |
| 1.1 | 31.65 | 18.98 | 96.31 | 3.69 |
| 0.5 | 0.69 | 0.41 | 96.72 | 3.28 |
| 0.25 | 0.37 | 0.22 | 96.94 | 3.06 |
| 0.12 | 0.49 | 0.29 | 97.24 | 2.76 |
| 0 | 4.61 | 2.76 | 100 | 0 |
| It is total | 166.73 | 100 |
Product grading forms under 2 closed-circuit screen of table
| Granularity/mm | Tail over weight/g | Tail over content/g | It is accumulative to tail over content/% | Accumulative throughput/% |
| 10 | 0 | 0 | 0 | 100 |
| 8 | 0 | 0 | 0 | 100 |
| 5 | 1.79 | 0.83 | 0.83 | 99.17 |
| 3 | 66.09 | 30.72 | 31.57 | 68.43 |
| 1.1 | 77.13 | 35.88 | 67.45 | 32.55 |
| 0.5 | 29.44 | 13.69 | 81.14 | 18.86 |
| 0.25 | 13.9 | 6.47 | 87.61 | 12.39 |
| 0.12 | 7.58 | 3.53 | 91.13 | 8.87 |
| 0.08 | 3.07 | 1.43 | 92.56 | 7.44 |
| 0 | 15.99 | 7.44 | 100 | 0 |
| It is total | 214.99 | 100 |
Had by the granularity that above-mentioned two table can see closed circuit material cake after extruding compared with raw material and is obviously reduced, wherein -3mm
Material content increases 45.8% close to 70% compared with raw material；The material content of -0.12mm is 8.87%, compared in raw material
Increase 6.11%.
Beneficial effects of the present invention:
1, environmental benefit
Semi-coke is the product after distillation process, have ash content is low, sulphur content it is low have good burning performance, reactivity is good, gasification
The features such as high-efficient is a kind of clean energy resource that country widelys popularize, and semi-coke replaces coal significant to environmental protection, each land
Mansion also repeatedly emphasizes that semi-coke substitution uses the emphasis for becoming " coal changes clean energy resource ", and production technology through the invention can have
The improvement semi-coke grindability of effect improves production efficiency, so that so that semi-coke is substituted blast furnace injection coal is converted into reality from theory is feasible
The industrialized production on border.
2, performance parameter
(1) granule size
It is as shown in table 3 raw material granularity, table 4 show the material carried out after open circuit extrusion experiment using technique described in invention
Cake granularity, the granularity for material cake after extruding of opening a way has compared with raw material to be obviously reduced, wherein the material content of -1.1mm is close to 90%,
21.9% is increased compared in raw material；The material content of -0.08mm is 24.32%, increases 12.85% compared in raw material.
The granularmetric composition of 3 raw material of table
The granularmetric composition of cake is expected after the open circuit roll-in of table 4
(2) unit-hour output
Since grindability is poor compared with bituminous coal for semi-coke, the combined amount of semi-coke will directly influence the platform of medium-speed pulverizer
When yield, by taking a certain practical condition as an example, when bituminous coal milling is used alone, the unit-hour output of medium-speed pulverizer be can achieve
41t/h, and unit-hour output drops to 35t/h after being mixed into 20% semi-coke raw material, with the platform of the raising medium-speed pulverizer of semi-coke ratio
When yield can further decline, seriously affected production production capacity, this is also that current semi-coke is difficult to an important original instead of coal dust
Because, and the powder ability processed that semi-coke can be effectively improved after semi-coke progress extruding early period is improved using technique designed by the present invention
Unit-hour output, be mixed into 30% after the Ramsbottom carbon powder that present invention process squeezed medium-speed pulverizer unit-hour output can be improved to 40t/h, with
It is approached when independent bituminous coal milling, can satisfy production requirement.
(3) service life of equipment
It is exactly using the another drawback of semi-coke, it will be obviously than the mixed coal powder of bituminous and anthracite to the abrasion of equipment
It is even more serious, this is because tip-angled shape is showed the organizational form of Ramsbottom carbon powder more, and bituminous and anthracite mixed coal powder tissue shape
Formula is more round and smooth, this also aggravate equipment attrition while promoting semi-coke use ratio, reduces the replacement cycle of equipment,
Increasing cost, the particle after being squeezed using Ramsbottom carbon powder after the technique in the present invention within -200 mesh can be directly used for being blown, because
The organizational form of this part will have a direct impact on the abrasion condition of follow-up equipment, therefore -200 mesh after the technique will be used blue
Charcoal particle is compared with without -200 mesh semi-coke particles of the technique, as shown in Figure 2 a and 2 b, it can be seen that is not used
The Ramsbottom carbon powder of invented technology shows obvious wedge angle or elongated acicular texture more, and Ramsbottom carbon powder after invented technology has been used to become
Must be more round and smooth, this has positive influence to equipment attrition is reduced.The Ramsbottom carbon powder after the technique will be used to mix with bituminous coal logical
Micro-organization chart after crossing middling speed powder-grinding as shown in figure 3, the coal dust overwhelming majority in pelletized form, corner angle are unobvious, this illustrates the work
For skill to Ramsbottom carbon powder shape is improved, reducing equipment attrition has good result.
(4) economic benefit
Since the price of current semi-coke will totally be lower than anthracitic price, semi-coke mixing is carried out using invented technology
Coal dust production can produce biggish economic interests, by taking current Tangshan Area homogeneity as an example for anthracite, price 1150
Yuan/ton, and the semi-coke that can be used for substituting the product is 1050 yuan/ton, then it is every using one ton of semi-coke replace anthracite can at
100 yuan are saved in sheet, it is contemplated that for large iron and steel enterprise to the huge usage amount of pulverized coal injection in blast furnace, this looks forward to large-scale steel
Industry is that have considerable economic benefit.
Therefore the present invention goes coalification to provide strong technology and economic guarantee for final.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (4)
1. a kind of device of efficient blowing Ramsbottom carbon powder characterized by comprising pan feeding belt, supplied materials elevator, high pressure roller
Grinding machine, vibrating screen, closed circuit finished product collection device and open circuit finished product collection device；
Wherein, the pan feeding belt is connected to the supplied materials elevator, and the supplied materials elevator is connected to the high-pressure roller mill,
The high-pressure roller mill is connected to the vibrating screen, the vibrating screen respectively with the closed circuit finished product collection device, the open circuit
Finished product collection device is connected to the pan feeding belt.
2. the method for being efficiently blown Ramsbottom carbon powder using device described in claim 1, which comprises the steps of:
Raw material is passed through in the pan feeding belt, the raw material is then passed through by the high pressure roller mill by the supplied materials elevator
In machine, then by adjusting the preset discharging-material size of big minor adjustment of the roll gap gap of the high-pressure roller mill, then opened described in
Road finished product collection device collects the raw material, or the raw material is passed through the vibrating screen and is sieved, by described closed circuit
Finished product collection device collects the raw material of pre-set dimension, and out-of-size raw material is passed through the pan feeding belt.
3. the preparation method of efficient blowing Ramsbottom carbon powder according to claim 2, which is characterized in that the partial size of the raw material
No more than 35mm.
4. application of the preparation method of efficient blowing Ramsbottom carbon powder described in claim 2 or 3 in field of metallurgy.
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| CN201910615765.9A CN110295260A (en) | 2019-07-09 | 2019-07-09 | The device and method of efficient blowing Ramsbottom carbon powder |
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| CN201910615765.9A CN110295260A (en) | 2019-07-09 | 2019-07-09 | The device and method of efficient blowing Ramsbottom carbon powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961772A (en) * | 2020-08-19 | 2020-11-20 | 付光临 | Preparation method and application of modified semi coke |
| CN112007743A (en) * | 2020-08-19 | 2020-12-01 | 付光临 | Blue charcoal preparation system of modification |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107400743A (en) * | 2016-05-18 | 2017-11-28 | 鞍钢股份有限公司 | Blast furnace coal injection method using semi coke as partial fuel |
-
2019
- 2019-07-09 CN CN201910615765.9A patent/CN110295260A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107400743A (en) * | 2016-05-18 | 2017-11-28 | 鞍钢股份有限公司 | Blast furnace coal injection method using semi coke as partial fuel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961772A (en) * | 2020-08-19 | 2020-11-20 | 付光临 | Preparation method and application of modified semi coke |
| CN112007743A (en) * | 2020-08-19 | 2020-12-01 | 付光临 | Blue charcoal preparation system of modification |
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Application publication date: 20191001 |