CN104073274B - A kind of production method of smelter coke - Google Patents
A kind of production method of smelter coke Download PDFInfo
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- CN104073274B CN104073274B CN201310103730.XA CN201310103730A CN104073274B CN 104073274 B CN104073274 B CN 104073274B CN 201310103730 A CN201310103730 A CN 201310103730A CN 104073274 B CN104073274 B CN 104073274B
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Abstract
The present invention discloses a kind of production method of smelter coke, including coal blending and coking, coal from coal blending groove is mixed into after mixed coal, 10% 40% ratios are sent into hot-press arrangement and are carried out hot pressing and make hot wafering by mass percentage, after again this hot wafering being pulverized, the mixed coal not carrying out hot pressing with another part is carried out after batch mixing, is re-fed into coke oven and carries out coking operation；Hot pressing temperature is 300 650 DEG C；Hot pressing pressure is 5 30MPa；The time of staying under hot press operation pressure is within 5 seconds.This process operation is simple and is easy to practical application, in the case of not changing mixed coal proportioning, effectively improves coke quality so that the reactivity of coke reduces, post reaction strength increases, had both protected high-quality caking coal, and reduced the production cost of coke again.
Description
Technical field
The invention belongs to coal processing field, it is related to coal blending and the production technology of coke, especially relate to a kind of metallurgy
The production method of coke.
Background technology
Although China's coking coal coal is complete, distribution is very unbalanced, and coking coal, rich coal are the main force's coals producing coke,
And in Chinese coking coal resource, coking coal only accounts for less than 24%, rich coal, gas rich coal only account for about 13%, remove high ash, high-sulfur, difficulty
Washing, cannot be used for the part of coking, the coking coal of high-quality and rich coal account for the ratio finding out coal resources reserves less than 6% and 3%.
High-quality coking coal, rich coal shortage have become the obstacle that Some Enterprises ensure coke quality at present.
Conventional mixed coal coke making process will reach the purpose improving coke quality to be carried out it has to using in a large number and cohering coal by force
Cooperation coal coking, improves coke reactivity especially by coal blending and post reaction strength needs to allocate into cohere coal by force, and cohere by force
Coal resource is extremely limited, and post reaction strength of coke will reach 65%, then need to allocate into 75%-80% coheres coal by force, and this just leads
Cause to coordinate the actually used proportioning of coal coking and China's coking coal reserves proportion serious unbalance at present, verified coking coal reserves by mesh
Front use ratio is only sufficient to exploitation and uses decades.
At present, the application of the new coke making process such as tamping coking and distribution type coal alleviates China's coking to a certain extent and uses
Coal and the conflicting situation of coking coal reserves.But, the progressively application with these new coke making process and coke oven are towards large-scale
The direction changed is developed, and the limitation of these new coking technologies also gradually displays.
As " a kind of metallurgical coke and its production method "（ CN1513948A）Invention, the metallurgical coke that the program produces is by fertilizer
Coal, bottle coal, weakly caking coal, coking coal, coke powder are formed.Weakly caking coal of the present invention is the weakly caking coal of designated area,
Area is applied by this coal farther out for other, cost of transportation can be led to increase, therefore, this scheme is by limiting that popularity is applied
System.
, in addition to part additionally need to add adhesive, its operating procedure is also complex for tamping coking.Smash except necessary
Gu outside operation equipment, also including preheating device, the dress of the batch mixing with adding during adhesive technique making preoperative Coal pretreatment firm by ramming
Put, what is more important also needs to install dust arrester, and tamping coking is pushed under conditions of pusher side oven door opening due to briquette
Carbonization chamber is if not taking dust suppression, flue dust and raw coke oven gas to be escaped in a large number, more tight to the damage ratio top dress coke oven of environment
Heavy and severe.Further, since current coke oven develops towards the direction maximized, the height of its tamping briquette receives technical conditions
Restriction, highly more than 5.5 meters, the stability of briquette is severely impacted such as briquette, easily collapses.Once briquette collapses, greatly
Amount coal dust will pile up pusher machine side so that pusher machine can not be walked in the original enterprising every trade of runway, affects other carbonization chambers
Coal-charging pushing works.Therefore, the tamping coking technique in the new coke making process changing coke quality is not only subject to technique multiple
The impact of the factors such as miscellaneous, long flow path, and tamping briquette height can not meet the development need in coke oven maximization direction.
In making metallurgical coke production technology firm by ramming in addition to the shortcoming that technological process is complicated, equipment is many, investment is larger, this technique
Also require the moisture regulation of mixed coal to 8% about, increased water transfer technique and increase equipment operation difficulty；In the refining of distribution type coal
In burnt technique, carry out joining adhesive technique except coal will be carried out heating, adjust with hydraulic art operation exceptionally also increasing, increased
Technical operation flow, and reduce equipment reliability of operation.
Briquetted coal blending coking process will allocate a certain proportion of adhesive into so that its cost accordingly increases, simultaneously as cohering
The mixing device reliability of operation of allocating into of agent is affected；Although briquetted coal blending coking process furnace coal weight increases, coking
Time also accordingly increases, and does not improve coke oven yield；Swollen to furnace wall with briquette in stove when increasing coking of moulded coal amount of allocating
Swelling pressure power increases, and can affect the coke oven life-span, simultaneously because the increase of moulded coal amount of allocating can lead to coke pushing current to increase, if by force
Close-burning molding coal charge, coke pushing current can steeply rise, and the stable operation to equipment is put forward higher requirement.
In the face of the problems referred to above, therefore, in the urgent need to developing a kind of simple to operate, stable new smelter coke life
Production. art, to reduce the amount of allocating of coking coal in coal blending, and replaces improving the technological process of coke quality at present.
Content of the invention
For the problem in the presence of existing Coal Blending Technology, the present invention provides a kind of production method of new smelter coke,
By carrying out after hot pressing pretreatment to part mixed coal, and the mixed coal not carrying out hot pressing with another part mixes production smelting later
The production method of golden coke, this process operation is simple and is easy to practical application, in the case of not changing mixed coal proportioning,
Effectively improve coke quality so that the reactivity of coke reduces, post reaction strength increases, and both protects high-quality caking coal,
Reduce the production cost of coke again.
The concrete technical scheme of the present invention is：
A kind of production method of smelter coke, including coal blending and coking it is characterised in that：By the coal mixing from coal blending groove
After becoming mixed coal, 10%-40% ratio is sent into hot-press arrangement and is carried out hot pressing and make hot wafering by mass percentage, then by this hot pressing
After block is pulverized, the mixed coal not carrying out hot pressing with another part is carried out after batch mixing, is re-fed into coke oven and carries out coking operation.
Concrete hot press operation condition is as follows：
（1）It is prepared hot wafering using the temperature range of medium and high temperature, be especially more conducive to the system of hot wafering in middle warm area
Standby.The temperature range suitably preparing hot wafering is 300-650 DEG C, and being particularly suited for temperature is 380-430 DEG C of interval；
（2）Hot press operation pressure：5-30MPa；
（3）The time of staying under hot press operation pressure for the hot wafering：Within 5 seconds.
After hot press operation, the diameter 10-40mm of hot wafering, height 5-30mm；The density of hot wafering is 1000-
1200kg/m3.
Hot wafering after crushed, grinding particle size：<3mm；
Described hot wafering is pulverized by reducing mechanism.
After described hot wafering is pulverized, do not carry out the mixed coal batch mixing of hot pressing by conveyer device and another part.
With existing improve coke quality make firm by ramming and distribution type coal smelter coke production technology compared with, using part hot wafering
The production technology carrying out metallurgical coke as mixed coal has significant advantage.Impressed pressure of the present invention and thermal source, profit
With the gel that in coal, itself separates out, coal compacting is cohered into that density is larger, intensity preferably and has certain fragility, be easy to follow-up
Grinding and processing using hot wafering to participate in coal blending coking technology be to be heated the gel itself being separated out in middle and high warm area using coal
As adhesive, save and add equipment and the technique that adhesive is adopted；In addition, in middle and high warm area, the moisture in coal is whole
Separate out, it is therefore not necessary to consider the impact of moisture, eliminate coal damping equipment；Hot wafering participate in coal blending enter coke oven after, due to
Itself no moisture is so that coking time shortens, further, since the increase of hot wafering density is so that as-fired coal density increases,
Because the double influence of these two aspects makes the coke oven single hole operating time shorten, coke oven total output increases.The prominent spy of the present invention
Point is on the premise of not changing coal blending kind, using heat pressing process, part mixed coal is carried out with pretreatment, thus improving coke
Quality is so that the reactivity of coke reduces by 4～9 percentage points, 4～12 percentage points of post reaction strength increase.This technological operation
Simply it is easy to industrialized production, improve coke quality, solve and allocate into for meeting coke quality in existing process of coking greatly
Amount coheres by force the problem of coal.
Brief description
Fig. 1 is present invention process flow chart.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings：
Technological process such as Fig. 1, mixed coal part feeding hot-press arrangement carries out hot pressing and makes hot wafering, by reducing mechanism
It is crushed to and carry out, after batch mixing, delivering to coal bunker, by charging car less than 3mm granularity, by conveyer device and with another part mixed coal
Load coke oven and carry out coking operation.The coking final temperature of coke is 1050 DEG C, and coking time is 16h.By standard GB/T/T400-
1996 STRENGTH ON COKE reactivity and post reaction strength are detected.Specific embodiment is as follows：
Embodiment 1
Mixed coal ratio：Bottle coal 10%, 1/3 coking coal 25%, rich coal 25%, coking coal 30%, lean coal 10%, heat in as-fired coal
Briquetting ratio is 40%, granularity<3mm；Hot pressing temperature：410℃；Hot pressing pressure 10MPa；Hot wafering density 1120kg/m3；Hot pressing
Stop 5 seconds under operating pressure；A diameter of 30mm of hot wafering, height 10mm；Top is loaded with mixed coal after hot wafering is mixed
Dress coke oven carries out coking.The reactivity of coke is 21.36%, with the hot wafering without pretreatment and using same coke making process
Gained coke is compared, and coke reactivity reduces 8.75 percentage points；Post reaction strength of coke is 61.16%, and without pre-
The hot wafering of process is simultaneously compared using same coke making process gained coke, and post reaction strength of coke increased 11.69 percentage points.
Embodiment 2
Mixed coal ratio：Bottle coal 5%, 1/3 coking coal 25%, rich coal 30%, coking coal 30%, lean coal 10%, heat in as-fired coal
Briquetting ratio is 10%, granularity<1mm；Hot pressing temperature：380℃；Hot pressing pressure 30MPa；Hot wafering density 1180kg/m3；Hot pressing
Stop 5 seconds under operating pressure；A diameter of 40mm of hot wafering, height 30mm；Top is loaded with mixed coal after hot wafering is mixed
Dress coke oven carries out coking.The reactivity of coke is 23.91%, with the hot wafering without pretreatment and using same coke making process
Gained coke is compared, and coke reactivity reduces 5.65 percentage points；Post reaction strength of coke is 57.18%, and without pre-
The hot wafering of process is simultaneously compared using same coke making process gained coke, and post reaction strength of coke increased 3.96 percentage points.
Embodiment 3
Mixed coal ratio：Bottle coal 10%, 1/3 coking coal 25%, rich coal 25%, coking coal 30%, lean coal 10%, heat in as-fired coal
Briquetting ratio is 20%, granularity<200 mesh；Hot pressing temperature：430℃；Hot pressing pressure 5MPa；Hot wafering density 1020kg/m3；Heat
Stop 5 seconds under press operation pressure；A diameter of 30mm of hot wafering, height 10mm；Load after hot wafering is mixed with mixed coal
Top dress coke oven carries out coking.The reactivity of coke is 23.94%, with the hot wafering without pretreatment and using same coking work
Skill gained coke is compared, and coke reactivity reduces 6.35 percentage points；Post reaction strength of coke be 58.65%, with without
The hot wafering of pretreatment is simultaneously compared using same coke making process gained coke, and post reaction strength of coke increased 8.29 percentages
Point.
Embodiment 4
Mixed coal ratio：Bottle coal 5%, 1/3 coking coal 25%, rich coal 30%, coking coal 30%, lean coal 10%, heat in as-fired coal
Briquetting ratio is 30%, granularity<3mm；Hot pressing temperature：420℃；Hot pressing pressure 10MPa；Hot wafering density 1140kg/m3；By heat
Briquetting is loaded top dress coke oven and carries out coking after being mixed with mixed coal.The reactivity of coke is 25.88%, and without pretreatment
Hot wafering is simultaneously compared using same coke making process gained coke, and coke reactivity reduces 4.00 percentage points；After coke gasification reaction
Intensity is 60.40%, with the hot wafering without pretreatment and using same coke making process gained coke compared with, after coke gasification reaction
Intensity increased 11.60 percentage points.
Claims (4)
1. a kind of production method of smelter coke, including coal blending and coking it is characterised in that：Coal from coal blending groove is mixed into
After mixed coal, 10%-40% ratio is sent into hot-press arrangement and is carried out hot pressing and make hot wafering by mass percentage, then by this hot wafering
After being pulverized, the mixed coal not carrying out hot pressing with another part is carried out after batch mixing, is re-fed into coke oven and carries out coking operation；Hot pressing
Temperature is 300-650 DEG C；Hot pressing pressure is 5-30MPa；The time of staying under hot press operation pressure is within 5 seconds；Through overheated
After press operation, the diameter 10-40mm of hot wafering, height 5-30mm；The density of hot wafering is 1000-1200kg/m3；Hot wafering warp
After pulverizing, grinding particle size<3mm.
2. smelter coke according to claim 1 production method it is characterised in that：Described hot pressing temperature is 380-430
℃.
3. smelter coke according to claim 1 production method it is characterised in that：Described hot wafering is to be filled by pulverizing
Put pulverizing.
4. smelter coke according to claim 1 production method it is characterised in that：After described hot wafering is pulverized,
Do not carry out the mixed coal batch mixing of hot pressing by conveyer device and another part.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104593028A (en) * | 2015-01-15 | 2015-05-06 | 安徽工业大学 | Method for producing high-quality metallurgical coke by using coal and rock indexes |
| CN105567269A (en) * | 2015-12-21 | 2016-05-11 | 武钢集团昆明钢铁股份有限公司 | Adhesive-free briquette coking method |
| CN107523319A (en) * | 2017-08-15 | 2017-12-29 | 宝钢集团新疆八钢铁有限公司 | A kind of method that coking increases high-quality gas rich coal amount of allocating |
| CN110295049A (en) * | 2019-07-09 | 2019-10-01 | 鞍钢股份有限公司 | A kind of efficient coke making and coal blending method using complicated mixed coal |
| CN111621314B (en) * | 2020-06-11 | 2021-11-02 | 河北中煤旭阳能源有限公司 | Tamping coal blending coking method |
| CN113046106A (en) * | 2021-03-15 | 2021-06-29 | 杜玉婷 | Processing device and method for improving bulk density of coal fed into furnace |
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| US4186054A (en) * | 1977-12-30 | 1980-01-29 | United States Steel Corporation | Process and apparatus for producing blast furnace coke by coal compaction |
| CN1030933A (en) * | 1988-01-16 | 1989-02-08 | 长春煤炭科学研究所 | The moulding of brown coal binder free |
| CN1632077A (en) * | 2003-12-22 | 2005-06-29 | 济南钢铁集团总公司 | Method and device for producing coking briquette by using waste residue from coke plant |
| CN102634362A (en) * | 2012-05-08 | 2012-08-15 | 宜宾天原集团股份有限公司 | Preparation technology of high-strength formed coke |
| CN102816577A (en) * | 2012-08-30 | 2012-12-12 | 武汉科技大学 | Coal-rock blending method suitable for tamping coking |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4186054A (en) * | 1977-12-30 | 1980-01-29 | United States Steel Corporation | Process and apparatus for producing blast furnace coke by coal compaction |
| CN1030933A (en) * | 1988-01-16 | 1989-02-08 | 长春煤炭科学研究所 | The moulding of brown coal binder free |
| CN1632077A (en) * | 2003-12-22 | 2005-06-29 | 济南钢铁集团总公司 | Method and device for producing coking briquette by using waste residue from coke plant |
| CN102634362A (en) * | 2012-05-08 | 2012-08-15 | 宜宾天原集团股份有限公司 | Preparation technology of high-strength formed coke |
| CN102816577A (en) * | 2012-08-30 | 2012-12-12 | 武汉科技大学 | Coal-rock blending method suitable for tamping coking |
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