CN100351397C - Additive of agglomeration for iron mine - Google Patents
Additive of agglomeration for iron mine Download PDFInfo
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- CN100351397C CN100351397C CNB2005100316486A CN200510031648A CN100351397C CN 100351397 C CN100351397 C CN 100351397C CN B2005100316486 A CNB2005100316486 A CN B2005100316486A CN 200510031648 A CN200510031648 A CN 200510031648A CN 100351397 C CN100351397 C CN 100351397C
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- additive
- agglomeration
- agglomerate
- iron
- sintering
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Abstract
The present invention relates to an additive for the agglomeration of iron ore for blast furnace ironmaking. The additive for the agglomeration of iron ore is composed of components of the following proportion by weight: 30 to 40% of sodium chloride, 30 to 40% of sodium nitrate, 10 to 15% of iron trichloride, 1 to 5% of cobalt chloride, 10 to 20% of lime, 1% of polyvinyl alcohol, and the dose of the additive for the agglomeration of iron ore is from 0.1/1000 to 0.1%. Compared with a reference test, the dose of the additive for the agglomeration of iron ore is within the range from 0.1/1000 to 0.1%, solid consumption is decreased for 5 to 10 kg/t, sintering ore drum strength is enhanced for 3 to 7%, sintering ore output is enhanced for 5 to 13%, and the discharge amount of CO2, SOx and NOx in sintering smoke gas is decreased for about 10% to 30%.
Description
Technical field the present invention relates to a kind of blast furnace ironmaking additive of agglomeration for iron mine, belongs to the ferrous metallurgy field.
The background technology agglomerate is the main raw material of China's blast furnace ironmaking, account for into 70% of stove iron charge, whole nation agglomerate annual production is about 300,000,000 tons, the average solid fuel consumption of agglomerate is more than 60 kilograms/ton, than developed country mean level (ML) high 10 kilograms/ton (external advanced level is 45 kilograms/ton). therefore, because agglomerate solid fuel consumption height, iron and steel enterprise's every year, many consumption were about 3,000,000 tons, cost increases by 10.5 hundred million yuan, in addition, annual to 800,000,000 tons of many emission greenhouses of atmosphere gas CO2, SO
2, NO
xDeng acid rain gas.
Summary of the invention reduces CO in the sinter fume in order to improve agglomerate output and quality
2, SO
xAnd NO
xDischarging, save sintering solid fuel, the invention provides a kind of blast furnace ironmaking additive of agglomeration for iron mine.
Ultimate principle
The required heat 80% of agglomeration for iron mine is provided by solid fuel ignition in the sinter bed, makes in the agglomerate to form enough liquid phases, through liquid phase condensate and fixed, makes agglomerate obtain corresponding strength and excellent metallurgical performance.
Solid-fuelled combustion position depends on bed of material oxygen position in the sinter bed, efficiency of combustion and burn-off rate, influence the release of heat and the temperature of sinter bed, the especially combustionvelocity of coke powder (coal dust) and the heat transfer rate in the bed of material influence the top temperature of zone of combustion in the sinter bed.Top temperature and oxygen position in the height of the fuel ratio decision sinter bed influence mainly the bond formation of phase calcium ferrite of agglomerate.In addition, the height of solid fuel proportioning directly influences CO in the sintered discharge gas in the sinter bed
2, SO
xAnd NO
xDischarging.
Adopt multifunction additive, comprise functions such as strengthening granulation, catalysis, combustion-supporting and oxidation, strengthen solid fuel ignition, make solid-fuelled chemical energy much more as far as possible be converted into heat energy, utilize less solid fuel to emit more heat, consume less oxygen amount, the hyperoxia position that keeps the bed of material promotes the formation of calcium ferrite, thereby reduces fuel consumption, obtain high sinter strength and good reductibility, have less sinter fume discharging
Additive of agglomeration for iron mine, weight percent consists of: sodium-chlor 30-40%, SODIUMNITRATE 30-40%, iron trichloride 10-15%, cobalt chloride 1-5%, lime 10-20%, polyvinyl alcohol 1%.
Additive amount is 0.1 ‰～0.1%, and additive is mixed with the aqueous solution and uses.Additive can add sinter mixture, also can be used for anticipating coke powder, adopts additive aqueous solution soaking coke powder, and the additive composition is penetrated in coke powder (coal dust) hole, strengthens the coke powder burning.All can be intensified-sintered, energy efficient.
Use energy saving and environment friendly multifunction additive to be used for powdered iron ore and iron ore concentrate sintered technical process as shown in the figure.Additive adds water-wet, granulation with after powdered iron ore, iron ore concentrate, flux, coke powder mix, and is distributed into igniting in the sintered cup, down draft sintering, cooling, and broken then, screening are told and returned mine (5mm) and the finished product agglomerate.
At mixture moisture 7～9%, additive amount is 0.1 ‰～0.1%, under the condition of dosage of coke 3.6～4.5%, and agglomerate TFe57～59%, R1.75～2.5, SiO
24.5～6.5%, agglomerate yield rate 70～80%, barrate strength 65～70%, utilization coefficient 1.7～1.9t/m
2H.
Compare with reference test, in additive amount is 0.1 ‰～0.1% scope, the solid burnup 5～10kg/t that descends, sintered ore rotary drum strength improves 3～7%, and agglomerate output improves 5～13%, CO in the sinter fume
2, SO
xAnd NO
xQuantity discharged decline 10%-30% about.
Description of drawings
Fig. 1: agglomeration for iron mine process flow diagram.
Embodiment
Example 1: reference test, compound consists of powdered iron ore (comprising Australian breeze, Brazilian breeze, India's breeze, South Africa breeze), homemade iron ore concentrate, coke powder 4.0%, basicity 2.0, mixture moisture 7%-9%, additive-free, the 3min that granulates behind the mixing, on Φ 300mm sintered cup, light a fire 1.5min (1100 ℃), sintering, cooling 5min (5KPa), broken then, fall 4 times, screening, measuring sintered ore rotary drum strength is 65.3%, agglomerate yield rate 73.5%, sintered cup utilization coefficient 1.52t/m
2H, the agglomerate solid burnup is 55.1kg/t, CO in the sinter fume
2, SO
xAnd NO
xPeak concentration be respectively 12%, 1100ppm and 540ppm.
When using additive, compound is formed, the sintering process condition is all identical with reference test, and difference is that additive is made into the aqueous solution and adds compound, addition is that 0.2 ‰ (wherein sodium-chlor 36%, SODIUMNITRATE 25%, iron trichloride 14%, cobalt chloride 4%, lime 20%, polyvinyl alcohol 1%.), dosage of coke is 3.8%, through mixing, granulate after in identical sintered cup sintering, sintered ore rotary drum strength is 68.2%, agglomerate yield rate 78.6%, sintered cup utilization coefficient 1.61t/m
2H, agglomerate solid burnup 48.9kg/t, CO in the sinter fume
2, SO
xAnd NO
xPeak concentration be respectively 13%, 850ppm and 410ppm.Compare with reference test, improve agglomerate output about 6%, save solid fuel consumption 6.2kg/t.
Example 2: additive amount 0.6 ‰ (it is identical with example 1 to fill a prescription) is made into the aqueous solution and adds compound, dosage of coke 4.0%, through mixing, granulate after in identical sintered cup sintering, sintered ore rotary drum strength is 69.1%, agglomerate yield rate 79.1%, sintered cup utilization coefficient 1.73t/m
2H, agglomerate solid burnup 45.3kg/t, CO in the sinter fume
2, SO
xAnd NO
xPeak concentration be respectively 11%, 800ppm and 400ppm.Compare with reference test, improve agglomerate output about 13.8%, save solid fuel consumption 9.8kg/t.
Example 3: (wherein sodium-chlor 31%, SODIUMNITRATE 38%, iron trichloride 13%, cobalt chloride 3%, lime 14%, polyvinyl alcohol 1% for additive amount 0.6 ‰.), be made into the aqueous solution and add coke powder (proportioning 4.0%), through mixing, granulate after in identical sintered cup sintering, sintered ore rotary drum strength is 68.7%, agglomerate yield rate 78.5%, sintered cup utilization coefficient 1.69t/m
2H, agglomerate solid burnup 46.5kg/t, CO in the sinter fume
2, SO
xAnd NO
xPeak concentration be respectively 14%, 790ppm and 380ppm.Compare with reference test, improve agglomerate output about 11.2%, save solid fuel consumption 8.6kg/t.
Example 4: additive amount 0.2 ‰ (it is identical with example 1 to fill a prescription), be made into the aqueous solution and add coke powder (proportioning 4.0%), through mixing, granulate after in identical sintered cup sintering, sintered ore rotary drum strength is 66.8%, agglomerate yield rate 76.2%, sintered cup utilization coefficient 1.68t/m
2H, agglomerate solid burnup 50.1kg/t, CO in the sinter fume
2, SO
xAnd NO
xPeak concentration be respectively 12%, 790ppm and 410ppm.Compare with reference test, improve agglomerate output about 10%, save solid fuel consumption 5kg/t.
Example 5: (wherein sodium-chlor 31%, SODIUMNITRATE 32%, iron trichloride 11%, cobalt chloride 5%, lime 20%, polyvinyl alcohol 1% for additive amount 0.7 ‰.), be made into the aqueous solution and add coke powder (proportioning 3.8%), through mixing, granulate after in identical sintered cup sintering, sintered ore rotary drum strength is 71.3%, agglomerate yield rate 80.5%, sintered cup utilization coefficient 1.81t/m
2H, agglomerate solid burnup 44.8kg/t, CO in the sinter fume
2, SO
xAnd NO
xPeak concentration be respectively 15%, 770ppm and 390ppm.Compare with reference test, improve agglomerate output about 10.9%, save solid fuel consumption 10.3kg/t.
Example 6: (wherein sodium-chlor 39%, SODIUMNITRATE 36%, iron trichloride 11%, cobalt chloride 2%, lime 11%, polyvinyl alcohol 1% for additive amount 0.3 ‰.), be made into the aqueous solution and add compound (proportioning 3.8%), through mixing, granulate after in identical sintered cup sintering, sintered ore rotary drum strength is 72.3%, agglomerate yield rate 79.4%, sintered cup utilization coefficient 1.72t/m
2H, agglomerate solid burnup 43.3kg/t, CO in the sinter fume
2, SO
xAnd NO
xPeak concentration be respectively 14.6%, 760ppm and 385ppm.Compare with reference test, improve agglomerate output about 13.2%, save solid fuel consumption 11.8kg/t.
Claims (2)
1. additive of agglomeration for iron mine, it is characterized in that: weight percent consists of: sodium-chlor 30-40%, SODIUMNITRATE 30-40%, iron trichloride 10-15%, cobalt chloride 1-5%, lime 10-20%, polyvinyl alcohol 1%.
2. the using method of the described additive of claim 1 is characterized in that: additive adds sinter mixture, or is used to anticipate coke powder, and additive amount is 0.1 ‰～0.1%, is mixed with the aqueous solution and uses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100316486A CN100351397C (en) | 2005-06-02 | 2005-06-02 | Additive of agglomeration for iron mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100316486A CN100351397C (en) | 2005-06-02 | 2005-06-02 | Additive of agglomeration for iron mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1873029A CN1873029A (en) | 2006-12-06 |
| CN100351397C true CN100351397C (en) | 2007-11-28 |
Family
ID=37483628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100316486A Expired - Fee Related CN100351397C (en) | 2005-06-02 | 2005-06-02 | Additive of agglomeration for iron mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100351397C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285116B (en) * | 2007-04-09 | 2010-04-14 | 姚春彪 | Iron ore adglutinate synergism combustion adjuvant and method for preparing same |
| CN101240375B (en) * | 2008-03-11 | 2010-05-12 | 营口和平三华矿产有限公司 | Iron sinter efflorescence-resisting agent and producing method thereof |
| KR101228599B1 (en) * | 2010-04-27 | 2013-02-07 | 오미혜 | Composition Of Additive For Metal Sintering |
| CN101831540B (en) * | 2010-06-12 | 2012-02-22 | 青岛国阳新能源炉料有限公司 | Sintering combustion improver for sintering mineral powder into sinter and use method thereof |
| CN102560085A (en) * | 2012-01-18 | 2012-07-11 | 中南大学 | Additive for reinforcing zinc removal of dust containing zinc and iron by metallized pellet sintering roasting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5669328A (en) * | 1979-11-10 | 1981-06-10 | Yoshiro Wakimura | Manufacture of iron manufacturing pellet |
| CN1064108A (en) * | 1992-03-06 | 1992-09-02 | 鞍山钢铁公司 | The pellet forming process of sinter mixture using liquid additive |
| CN1271780A (en) * | 1999-04-28 | 2000-11-01 | 才振东 | Series sinter additives |
-
2005
- 2005-06-02 CN CNB2005100316486A patent/CN100351397C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5669328A (en) * | 1979-11-10 | 1981-06-10 | Yoshiro Wakimura | Manufacture of iron manufacturing pellet |
| CN1064108A (en) * | 1992-03-06 | 1992-09-02 | 鞍山钢铁公司 | The pellet forming process of sinter mixture using liquid additive |
| CN1271780A (en) * | 1999-04-28 | 2000-11-01 | 才振东 | Series sinter additives |
Non-Patent Citations (1)
| Title |
|---|
| 攀钢烧结添加有机粘结剂的实验室研究 黎建明，舒文东.钢铁钒钛，第15卷第4期 1994 * |
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|---|---|
| CN1873029A (en) | 2006-12-06 |
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