CN1220782C - Mini-pelletized sinter produced by sludge containing ferrum and production process thereof and special shaft furnace - Google Patents
Mini-pelletized sinter produced by sludge containing ferrum and production process thereof and special shaft furnace Download PDFInfo
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- CN1220782C CN1220782C CN 02144842 CN02144842A CN1220782C CN 1220782 C CN1220782 C CN 1220782C CN 02144842 CN02144842 CN 02144842 CN 02144842 A CN02144842 A CN 02144842A CN 1220782 C CN1220782 C CN 1220782C
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Abstract
The present invention discloses a mini pelletized sinter produced by using sludge containing iron, a technological process thereof and a special shaft furnace thereof, which overcomes the defects of easy cause of secondary pollution, complicated technological flow and high investment which exist in the prior art. The mini pelletized sinter comprises the ingredients of the following proportion by weight: 40 to 45% of converter mud, 12 to 17% of dust removal mud for ironmaking, 10 to 15% of gas mud and 30 to 35% of iron ore concentrate; the water content of the ingredients need to be controlled to be 8 to 10%, sludge containing iron is needed when the mini pelletized sinter is produced, and the sludge containing iron contains 2 to 3% of carbon; in the technological process of the mini pelletized sinter, the mini pelletized sinter is produced by preparing, mixing, pelletizing, sintering, discharging and sieving raw materials; the special shaft furnace is characterized in that the lower part of the furnace body is connected with a discharging pipe, the upper part of which is provided with a material meter, and the lower part of which is provided with a discharge vibration sieve. Powder dust and harmful gases generated by the present invention meet the requirements for environmental protection via detection; the present invention has the advantages of reliable operation, realization of continuous production, less dissipation of heat quantity, and good effect on energy saving, enables the operating rate to reach more than 80%, and completely meets the requirements for blast furnace smelting.
Description
Technical field
The present invention relates to Steel Plant's ion dust mud contaning processing technology field, particularly small-ball sintering mine and processing method and the special-purpose shaft furnace of producing with ion dust mud contaning.
Background technology
Produce a large amount of ion dust mud contanings in iron and steel enterprise's production process,, wherein contain useful elements such as iron, carbon, calcium, magnesium as sintering dust separation ash, blast furnace dust (mud), revolving furnace mud, steel rolling iron scale etc.If it is bad that these ion dust mud contanings are handled, both wasted resource, polluted environment again.Along with the development of Iron and Steel Production, all recycle iron-containing resource, improve environment protection and have great economic benefit and social benefit.
That ion dust mud contaning has is dried, there also have to be wet, have coarse size, also fine size is arranged, have iron content high, also have iron content low.These dirt mud have can directly return sintering and use, and what have needs processing treatment.How rationally making good use of ion dust mud contaning, should reduce the influence to production process, reduce environmental pollution again, is a more complicated and urgent problem.
Iron and steel metallurgy enterprise ion dust mud contaning treatment process mainly contains: directly allocate sinter mixture, batch mixing method, native sintering process, machine-processed pressure ball method, mini-pellets sintering process etc. into.
The shortcoming that above-mentioned several method exists is: cause secondary pollution, technical process complexity, investment height easily.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned shortcoming and a kind of small-ball sintering mine and processing method and special-purpose shaft furnace of producing with ion dust mud contaning is provided.Refuel promptly can not produced qualified small-ball sintering mine in addition, and processing method is simple, and dust and obnoxious flavour that shaft furnace production is produced satisfy emission request fully through environmental protection tests.
The main raw material composition is by steel-making converter mud, ironmaking dedusting mud, gas mud, and forms various raw material Chemical Composition following (raw material Chemical Composition table) according to the iron ore concentrate that the chemical ingredients needs are furnished with some amount:
Raw material Chemical Composition table
| The name of an article | Fe | SiO 2 | CaO | FeO | C | H 2O |
| Revolving furnace mud | 60.73 | 3.5 | 7.29 | 45.80 | - | 15 |
| Dedusting mud | 50.19 | 6.55 | 13.01 | 6.38 | - | - |
| Gas ash | 51.79 | 8.85 | 4.26 | 8.17 | 13 | 10 |
| Concentrate | 65.0 | 7.0 | - | - | - | 8 |
With the small-ball sintering mine that ion dust mud contaning is produced, it is characterized in that: its ingredients by weight per-cent is: revolving furnace mud 40%-45%, ironmaking dedusting mud 12%-17%, gas mud 10%-15%, iron ore concentrate 30%-35%; Need to control the wherein moisture maintenance 8%-10% of batching in the batching, small-ball sintering mine needs the full carbon containing of ion dust mud contaning to keep the ion dust mud contaning of 2%-3%.
Above-mentioned small-ball sintering mine technological process is finished by following step:
1) raw material is prepared
Small-ball sintering mine is used shaft furnace production, raw materials used dirt mud for being produced in steel-making, the iron-making production, and according to producing and the requirement of product Chemical Composition, proportioning once stirs neutralization in proportion;
Ingredients by weight per-cent is pressed following per-cent: revolving furnace mud 40%-45%, ironmaking dedusting mud 12%-17%, gas mud 10%-15%, iron ore concentrate 30%-35%; The moisture that needs to control wherein batching in the batching keeps 8%-10%, and small-ball sintering mine needs ion dust mud contaning full carbon containing to keep 2%-3%, and the small-ball sintering mine of production satisfies the index that furnace charge is gone in ironmaking;
2) mix and make ball
Once stir the neutralization material and carry out batch mixing by biaxial rneader, deliver to balling disc by chain elevator after mixing and make ball, the green-ball granularity is 8-15mm, moisture 8%-10%, and green ball strength falls indeformable being as the criterion 4 times with 0.5m;
3) sintering process
After the shaft furnace igniting blow-on, the ball that balling disk (-sc) is made by the even cloth of revolving top in stove, by bottom air-supply sintering, sintered layer thickness is 0.5m, and temperature is controlled at and is not more than 1200 ℃, along with the bottom discharge, the top cloth carries out continuously, and whole process is preheating, sintering, three part compositions of cooling;
4) discharge and screening
Cooled finished product is by the fragmentation of shaft furnace tower tray, discharge, tower tray produces the sintering process liquid phase and bonds together bulk crushing to 50mm, discharge by the vibratory screening apparatus that drainage conduit is divided into, vibratory screening apparatus grid section spacing is 8mm, the botryoidal structure of the finished product 8-50mm that discharges also has the single ball of part to exist.
The special-purpose shaft furnace structure that above-mentioned small-ball sintering mine technological process is used is described below:
The employed special-purpose shaft furnace of processing method of the small-ball sintering mine of producing with ion dust mud contaning, it comprises body of heater, feed opening, the chimney above the body of heater and the tower tray below the body of heater, be connected with retarding mechanism below the tower tray, the tower tray face is equipped with blanking hole and tooth, the body of heater bottom is connected with air duct, and air duct connects gas blower, it is characterized in that: the body of heater bottom connects drainage conduit, level gage is equipped with on drainage conduit top, and the lower end of drainage conduit is provided with the discharge vibratory screening apparatus; Tower tray combines with vibratory screening apparatus, plays the whole grain effect of agglomerate.
Producing small-ball sintering mine beneficial effect compared with prior art with shaft furnace is: owing to contain moisture in the cloth, and refuel in addition not, dust that is produced and obnoxious flavour satisfy environmental requirement through environmental protection tests.It is reliable that shaft furnace is produced small-ball sintering mine, and operating rate reaches more than 80%, can realize serialization production.Between shaft furnace housing and the refractory brick lagging material is arranged, heat scatters and disappears few, reaches energy-conservation effect, sintered layer is arrived in the bottom air blast again behind the overcooling agglomerate, be actually hot gas sintering, the small-ball sintering mine of producing with sinter machine relatively contains C2% and satisfies the sintering needs fully with interior in the compound.The small-ball sintering mine that shaft furnace is produced, for botryoidal structure adds the monomer ball, because cloth, discharge carry out continuously, the sintering process unanimity has overcome the different defective of the upper and lower layer of sinter machine structure, satisfies the blast-furnace smelting needs fully.
Description of drawings
Fig. 1 is the shaft furnace structural representation.
Embodiment
Embodiment 1
With the small-ball sintering mine that ion dust mud contaning is produced, its ingredients by weight per-cent is: revolving furnace mud 40%, dedusting mud 14%, gas mud 11%, iron ore concentrate 35%; Need to control the wherein moisture 8% of batching in the batching, small-ball sintering mine need keep the ion dust mud contaning of carbon containing 2%.
Above-mentioned small-ball sintering mine processing method is finished by following step:
1) raw material is prepared
Small-ball sintering mine is used shaft furnace production, raw materials used dirt mud for being produced in steel-making, the iron-making production, and its Chemical Composition, moisture meeting content difference is bigger, and according to producing and the requirement of product Chemical Composition, proportioning once stirs neutralization in proportion; Ingredients by weight per-cent is: revolving furnace mud 40%, dedusting mud 14%, gas mud 11%, iron ore concentrate 35%; The moisture that needs to control wherein batching in the batching keeps 8%, and small-ball sintering mine needs ion dust mud contaning full carbon containing to keep 2%, and the small-ball sintering mine of production satisfies the index that furnace charge is gone in ironmaking;
2) mix and make ball
Once stir the neutralization material and carry out batch mixing by biaxial rneader, deliver to balling disc by chain elevator after mixing and make ball, the green-ball granularity is 8-15mm, moisture 8%, and green ball strength falls indeformable being as the criterion 4 times with 0.5m;
3) sintering process
After the shaft furnace igniting blow-on, the ball that balling disk (-sc) is made by the even cloth of revolving top in stove, by bottom air-supply sintering, sintered layer thickness is 0.5m, and temperature is controlled at and is not more than 1200 ℃, along with the bottom discharge, the top cloth carries out continuously, and whole process is preheating, sintering, three part compositions of cooling;
4) discharge and screening
Cooled finished product is by the fragmentation of shaft furnace tower tray, discharge, tower tray produces the sintering process liquid phase and bonds together bulk crushing to 50mm, discharge by the vibratory screening apparatus that drainage conduit is divided into, vibratory screening apparatus grid section spacing is 8mm, the botryoidal structure of the finished product 8-50mm that discharges also has the single ball of part to exist.
The special-purpose shaft furnace structure that above-mentioned small-ball sintering mine technological process is used is described below.
The employed special-purpose shaft furnace (see figure 1) of processing method of the small-ball sintering mine of producing with ion dust mud contaning, it comprises the tower tray 4 below body of heater 3, feed opening 2, the chimney above the body of heater 1 and the body of heater, be connected with retarding mechanism 5 below the tower tray 4, the tower tray face is equipped with blanking hole and tooth, body of heater 3 bottoms are connected with air duct 6, air duct 6 connects gas blower 7, body of heater 3 bottoms connect drainage conduit 9, level gage 10 is equipped with on drainage conduit 9 tops, the lower end of drainage conduit 9 is provided with discharge vibratory screening apparatus 8, and the level gage 10 on the drainage conduit 9 plays the sealing gland effect; Tower tray 4 combines with vibratory screening apparatus 8, plays the whole grain effect of agglomerate.
Embodiment 2
With the small-ball sintering mine that ion dust mud contaning is produced, it is characterized in that: its ingredients by weight per-cent is: revolving furnace mud 43%, dedusting mud 12%, gas mud 13%, iron ore concentrate 32%; Need to control the wherein moisture 10% of batching in the batching, small-ball sintering mine need keep the ion dust mud contaning of carbon containing 3%.Its processing method and shaft furnace structure are with the narration of embodiment 1.
Embodiment 3
With the small-ball sintering mine that ion dust mud contaning is produced, it is characterized in that: its ingredients by weight per-cent is: revolving furnace mud 44%, dedusting mud 16%, gas mud 10%, iron ore concentrate 30%; Need to control the wherein moisture 9% of batching in the batching, small-ball sintering mine need keep the ion dust mud contaning of carbon containing 3%.Its processing method and shaft furnace structure are with the narration of embodiment 1.
Claims (3)
1, the small-ball sintering mine of producing with ion dust mud contaning, it is characterized in that: its ingredients by weight per-cent is: revolving furnace mud 40%-45%, ironmaking dedusting mud 12%-17%, gas mud 10%-15%, iron ore concentrate 30%-35%; Need to control the wherein moisture maintenance 8%-10% of batching in the batching, small-ball sintering mine needs the full carbon containing of ion dust mud contaning to keep the ion dust mud contaning of 2%-3%.
2, the processing method of the small-ball sintering mine of producing with ion dust mud contaning is characterized in that:
1) raw material is prepared
Small-ball sintering mine is used shaft furnace production, raw materials used dirt mud for being produced in steel-making, the iron-making production, and according to producing and the requirement of product Chemical Composition, proportioning once stirs neutralization in proportion;
Ingredients by weight per-cent is: revolving furnace mud 40%-45%, ironmaking dedusting mud 12%-17%, gas mud 10%-15%, iron ore concentrate 30%-35%; The moisture that needs to control wherein batching in the batching keeps 8%-10%, and small-ball sintering mine needs ion dust mud contaning full carbon containing to keep 2%-3%, and the small-ball sintering mine of production satisfies the index that furnace charge is gone in ironmaking;
2) mix and make ball
Once stir the neutralization material and carry out batch mixing by biaxial rneader, deliver to balling disc by chain elevator after mixing and make ball, the green-ball granularity is 8-15mm, moisture 8%-10%, and green ball strength falls indeformable being as the criterion 4 times with 0.5m;
3) sintering process
After the shaft furnace igniting blow-on, the ball that balling disk (-sc) is made by the even cloth of revolving top in stove, by bottom air-supply sintering, sintered layer thickness is 0.5m, and temperature is controlled at and is not more than 1200 ℃, along with the bottom discharge, the top cloth carries out continuously, and whole process is preheating, sintering, three part compositions of cooling;
4) discharge and screening
Cooled finished product is by the fragmentation of shaft furnace tower tray, discharge, tower tray produces the sintering process liquid phase and bonds together bulk crushing to 50mm, discharge by the vibratory screening apparatus that drainage conduit is divided into, vibratory screening apparatus grid section spacing is 8mm, the botryoidal structure of the finished product 8-50mm that discharges also has the single ball of part to exist.
3, the special-purpose shaft furnace that uses with the small-ball sintering mine processing method of ion dust mud contaning production according to claim 2, it comprises body of heater, feed opening, the chimney above the body of heater and the tower tray below the body of heater, be connected with retarding mechanism below the tower tray, the tower tray face is equipped with blanking hole and tooth, the body of heater bottom is connected with air duct, and air duct connects gas blower, it is characterized in that: the body of heater bottom connects drainage conduit, level gage is equipped with on drainage conduit top, and the lower end of drainage conduit is provided with the discharge vibratory screening apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144842 CN1220782C (en) | 2002-11-18 | 2002-11-18 | Mini-pelletized sinter produced by sludge containing ferrum and production process thereof and special shaft furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144842 CN1220782C (en) | 2002-11-18 | 2002-11-18 | Mini-pelletized sinter produced by sludge containing ferrum and production process thereof and special shaft furnace |
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| Publication Number | Publication Date |
|---|---|
| CN1500891A CN1500891A (en) | 2004-06-02 |
| CN1220782C true CN1220782C (en) | 2005-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02144842 Expired - Fee Related CN1220782C (en) | 2002-11-18 | 2002-11-18 | Mini-pelletized sinter produced by sludge containing ferrum and production process thereof and special shaft furnace |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007063603A1 (en) * | 2005-12-02 | 2007-06-07 | Kyouzai Kogyo Co., Ltd. | Method of granulating sintering raw material and process for producing sintered ore |
| CN102492833B (en) * | 2011-11-16 | 2013-06-19 | 内蒙古包钢钢联股份有限公司 | Method for applying ferric dust in sintering |
| CN109943712B (en) * | 2019-04-02 | 2020-10-27 | 青海际华江源实业有限公司 | Chromium mineral powder sintering method and sintering system |
| CN112853089B (en) * | 2020-12-31 | 2022-06-24 | 山东莱钢永锋钢铁有限公司 | Method for producing sintered ore from shaft kiln type iron ore powder |
| CN112961976B (en) * | 2021-01-29 | 2022-06-14 | 武汉科技大学 | Preparation and blending degree evaluation method of sintering material precursor |
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