CN101463423B - Composite spraying agent for iron sintering ore - Google Patents
Composite spraying agent for iron sintering ore Download PDFInfo
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- CN101463423B CN101463423B CN2009100766236A CN200910076623A CN101463423B CN 101463423 B CN101463423 B CN 101463423B CN 2009100766236 A CN2009100766236 A CN 2009100766236A CN 200910076623 A CN200910076623 A CN 200910076623A CN 101463423 B CN101463423 B CN 101463423B
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- iron
- sintered ore
- iron sintered
- percent
- spray
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Abstract
The invention belongs to the iron ore sintering field and relates to an iron sintered ore composite spray. The reducibility of the iron sintered ore at low temperature is lowered to improve the reduction intensity of the iron sintered ore in a blast furnace under low temperature reduction conditions, lower the low temperature reduction degradation rate and improve the permeability of the iron sintered ore on the upper part of the blast furnace, thereby facilitating the smooth operation of the upper part of the blast furnace, the yield rise of the blast furnace and the reduction of the coke ratio. The iron sintered ore composite spray is characterized in that the spray comprises the components by weight percent of 20-50 percent of B2O3, 40-60 percent of SiO2 and 10-20 percent of Al2O3. In the specific using method, the B2O3, the SiO2 and the Al2O3 are proportionally and uniformly mixed and dissolved in water. The concentration of spraying solution is 5-15 percent and the water temperature is 20-50 DEG C. A solid atomizer is adopted for uniformly spraying the spray on the surface of the iron sintered ore. The spraying amount of the iron sintered ore composite spray per ton is controlled at 0.4-2kg. The composite spray has the advantages of good environmental protection effect, convenient raw material purchase, low price, suitability for various iron sintered ores and large extent of the reduction of the low temperature reduction degradation rate.
Description
Technical field
The invention belongs to the iron ore sintering field, relate to a kind of composite spraying agent for iron sintering ore, by reducing iron agglomerate reductibility at low temperatures, thereby improve iron agglomerate reduction intensity under the low-temperature reduction condition in blast furnace, reduce low temperature reduction degradation index, improve the ventilation property of iron agglomerate, help the direct motion of blast furnace top, help improving furnace processor and reduce coke ratio on blast furnace top.
Background technology
The 4th the international agglomeration meeting of holding at Toronto in 1985, German scholar HA Gottfried Kottmann propose " to reduce or eliminate the novel method of ball reduction degradation in blast furnace with ore deposit and agglomerate.This method is with very rare halogenide, as CaCl
2, MgCl
2, NaCl solution, spray or add wet finished product enriched ore (agglomerate, pellet), this method is to reduce or eliminate fully the novel method of reduction degradation.After this two during the last ten years, iron and steel enterprise all generally adopts and sprays above-mentioned halogenide both at home and abroad, reduces the low temperature reduction degradation index of iron agglomerate and pellet, improves the reduction intensity of enriched ore.But along with science and technology development, entered since 21st century, west industrially developed country, find that halogenide not only has stronger corrodibility to metal construction, halid " Cl " ion is the source (claiming the Cl source) that produces Dioxins in the pyrometallurgical process, Dioxins is to environment and the most deleterious gas of the mankind, is the most serious carcinogenic material.
Summary of the invention
The present invention adopts the negative catalysis principle, selects boride and SiO
2And Al
2O
3Form the environmental protection composite spraying agent Deng inorganic substance, substitute the non-environmental protection halogenide (CaCl that domestic and international in the past iron and steel enterprise generally adopts
2, MgCl
2, NaCl) the sintering spray agent, reach equally iron agglomerate is not reduced at low temperatures substantially, reduce their low temperature reduction degradation index significantly and do not influence reductibility under high temperature (＞700 ℃), reach and improve the purpose of iron agglomerate in blast furnace top ventilation property.
A kind of composite spraying agent for iron sintering ore, its composition weight percent is: 20%～50%B
2O
3, 40%～60%SiO
2, 10%～20%Al
2O
3
Composite spraying agent is the pale powder, and concrete using method is: with B
2O
3With SiO
2And Al
2O
3Be dissolved in the water behind the uniform mixing according to the above ratio, the concentration of spray solution is 5%～15%, and the temperature of water is 20 ℃～50 ℃.Adopt solid atomizer to be sprayed onto the surface of iron agglomerate equably.The sprinkling amount of agglomerate composite spraying agent per ton is controlled at 0.4～2 kilogram.
This composite spraying agent can reduce the iron agglomerate low temperature reduction degradation index, improves the low-temperature reduction intensity of iron agglomerate, adopts the advantage of this composite spraying agent to be:
1. environment protecting is good.This spray agent has been got rid of " chlorine " source having a strong impact on equipment and environment to metal construction and environmental nonpollution influence.
2. be applicable to different types of iron agglomerate, the amplitude that reduces low temperature reduction degradation index is big.
3. materials procurement is convenient, and price is lower, and it is 1.0～3.0 yuan that the ton iron agglomerate increases cost.
Description of drawings
Fig. 1 is the spray solution equipment flowsheet
Embodiment
Configuration device is that 1.2 cubic metres the dissolving vessel of belt stirrer and the sprinkling jar of a same belt stirrer are formed by a volume, and the volume that sprays jar is 1.8 cubic metres.
Adopt iron agglomerate spray agent of the present invention, be used to hold a steel and day effect of two kinds of different mineral of steel: hold steel owing to be vanadium titano-magnetite, the low temperature reduction degradation index especially severe of its agglomerate.After adopting spray agent of the present invention, effect is remarkable, and corresponding index has had very big improvement, and its numerical value change is as shown in table 1:
Table 1 holds the steel agglomerate and sprays front and back RDI index variation
Annotate: 6ANY4 solution is by 20%B
2O
3+ 60%SiO
2+ 20%Al
2O
3Form.
It steel agglomerate since 85% join the ore deposit than being the ground hematite (Fe of import
2O
3), its cryogenic reducting powder index is also poor, adopt composite spraying agent of the present invention to spray after, the effect of improving cryogenic reducting powder index also clearly, the RDI numerical value before and after spraying is listed in table 2:
RDI index variation situation before and after table 2 day steel agglomerate sprays
Annotate: 5ACY2 solution is by 40%B
2O
3+ 50%SiO
2+ 10%Al
2O
3Form, 4ACY3 solution is by 45%B
2O
3+ 40%SiO
2+ 15%Al
2O
3Form.
By above instance data explanation, adopt environmental protection composite spraying agent of the present invention to handle iron agglomerate, no matter to the extraordinary ore deposit of the vanadium titanium of Chengde Iron ﹠ Steel Corp., still to the sky steel with addition of the higher iron agglomerate of import ore deposit ratio, all have obvious effects: RDI+6.3 to improve 11.5%～23.0%; RDI+3.15 improves 12%～31.2%; RDI-0.5 reduces by 1.8%～11.5%, is a strong behave that improves iron agglomerate low-temperature reduction intensity.
Claims (2)
1. a composite spraying agent for iron sintering ore is characterized in that the composition weight percent is: 20%～50%B
2O
3, 40%～60%SiO
2, 10%～20%Al
2O
3
2. a kind of according to claim 1 composite spraying agent for iron sintering ore is characterized in that concrete using method is: with B
2O
3With SiO
2And Al
2O
3Be dissolved in the water behind the uniform mixing according to the above ratio, the concentration of spray solution is 5%～15%, and the temperature of water is 20 ℃～50 ℃; Adopt solid atomizer to be sprayed onto the surface of iron agglomerate equably, the sprinkling amount of agglomerate composite spraying agent per ton is controlled at 0.4～2 kilogram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100766236A CN101463423B (en) | 2009-01-12 | 2009-01-12 | Composite spraying agent for iron sintering ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100766236A CN101463423B (en) | 2009-01-12 | 2009-01-12 | Composite spraying agent for iron sintering ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101463423A CN101463423A (en) | 2009-06-24 |
| CN101463423B true CN101463423B (en) | 2010-07-28 |
Family
ID=40804214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100766236A Expired - Fee Related CN101463423B (en) | 2009-01-12 | 2009-01-12 | Composite spraying agent for iron sintering ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101463423B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608256B (en) * | 2009-07-16 | 2011-05-18 | 武钢集团昆明钢铁股份有限公司 | Method for manufacturing sintering ore from limonite with high content of crystal water |
| CN102605176A (en) * | 2012-04-09 | 2012-07-25 | 通化耐博新材料股份有限公司 | Low-temperature pulverization inhibitor for sintered ore |
| CN102899429A (en) * | 2012-09-19 | 2013-01-30 | 秦皇岛赛文冶金科技有限公司 | Blast furnace smelting raw material modifier |
| CN102899482B (en) * | 2012-10-09 | 2014-03-12 | 李兴文 | Isothermal sintering process of iron ore powder |
| CN106591570A (en) * | 2016-11-15 | 2017-04-26 | 江苏省冶金设计院有限公司 | Method and system for improving reducing property of high-aluminum pellet ore |
| CN106591568A (en) * | 2016-11-15 | 2017-04-26 | 江苏省冶金设计院有限公司 | Method for restraining reduction degradation of limonite pellets and system |
| CN106591573A (en) * | 2016-11-15 | 2017-04-26 | 江苏省冶金设计院有限公司 | Method for restraining reduction expansion of copper slag pellets and dedicated system of method |
| CN106755977A (en) * | 2016-11-15 | 2017-05-31 | 江苏省冶金设计院有限公司 | A kind of method and system for improving sulfate slag pellet ore metallurgical performance |
| CN106591569A (en) * | 2016-11-15 | 2017-04-26 | 江苏省冶金设计院有限公司 | Method and system for restraining reduction degradation of kakoxene pellet |
-
2009
- 2009-01-12 CN CN2009100766236A patent/CN101463423B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101463423A (en) | 2009-06-24 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100728 Termination date: 20160112 |