CN101597533B - Combustion-supporting sulfur-fixing agent used in rotary kiln coal powder injection - Google Patents
Combustion-supporting sulfur-fixing agent used in rotary kiln coal powder injection Download PDFInfo
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- CN101597533B CN101597533B CN2009100231293A CN200910023129A CN101597533B CN 101597533 B CN101597533 B CN 101597533B CN 2009100231293 A CN2009100231293 A CN 2009100231293A CN 200910023129 A CN200910023129 A CN 200910023129A CN 101597533 B CN101597533 B CN 101597533B
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Abstract
The invention discloses a combustion-supporting sulfur-fixing agent used in rotary kiln coal powder injection, prepared by the following chemical ingredients by weight percent: 20-40% of CaCO3, 15-25% of La2O3, 15-25% of FeCl3, 5-15% of CuCl2.H2O, 5-15% of KCl and 5-15% of MnO2; and the sum of weight percent of the chemical ingredients is 100%. The preparation is simple, the cost is low, and the aims of lowering ignition point and reducing sulphur dioxide discharging can be achieved. When in use, 0.4-2% of combustion-supporting sulfur-fixing agent is added, the ignition point of the coal powder can be reduced by 30-50 DEG C, combustion efficiency of the coal powder can be improved by 4-10%, and sulfur-fixing rate can reach more than 50%, so that total SO2 emission is reduced by more than 40%. Not only the utilization rate of coal is improved, but also environmental pollution is reduced.
Description
Technical field
The invention belongs to metallurgy (chemical industry) field, relate to a kind of combustion-supporting sulfur-fixing agent, particularly a kind of combustion-supporting sulfur-fixing agent that is used for rotary kiln baking iron ore coal powder injection process.
Background technology
In rotary kiln baking iron ore process, generally adopt the fuel of coal injection as reaction process.This method has been brought some drawbacks, and it is big mainly to show as the technology consumption of coal, and smoke discharge amount is big.Because factors such as ature of coal amount or coal blending cause coal dust incomplete in the rotary kiln internal combustion, have caused the waste of resource and have improved production cost; And staple is a sulfurous gas in the flue dust that produces in process of production, and sulfurous gas is one of principal pollutant in the topsoil, as it is very high to efflux in the flue dust content of sulfur dioxide, then can bring sizable harm to environment.
Summary of the invention
In order to solve the coal-fired utilising efficiency of roasting iron ore rotary kiln problem of environmental pollution low and that bring because of burning; The objective of the invention is to; A kind of combustion-supporting sulfur-fixing agent that is used for rotary kiln coal powder injection is provided; It is the point of ignition that reduces coal dust that this combustion-supporting sulfur-fixing agent mainly acts on, and to reach the utilization ratio that improves coal, reduces the coal dust usage quantity; Through solid sulphur effect a large amount of sulphur is existed with the form of slag on the other hand, reduce the discharging of sulfurous gas.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of combustion-supporting sulfur-fixing agent that is used for rotary kiln coal powder injection is characterized in that, this combustion-supporting sulfur-fixing agent that makes is prepared by following chemical ingredients by weight percentage: CaCO
3: 20%～40%, La
2O
3: 15%～25%, FeCl
3: 15%～25%, CuCl
2H
2O:5%～15%, KCl:5%～15%, MnO
2: 5%～15%; The weight percent sum of chemical ingredients is 100%.
The combustion-supporting sulfur-fixing agent that is used for rotary kiln coal powder injection of the present invention's preparation is made simply, and is with low cost, and can reach the reduction point of ignition, reduces the purpose of sulfur dioxide emissions.In use, combustion-supporting sulfur-fixing agent adds 0.4%～2%, can reduce coal powder ignition point 30～50 degree, and coal combustion rate can improve 4%～10%, and sulfur-fixing rate reaches more than 50%; Control SO
2Total emission volumn reduces more than 40%.Not only improve the utilization ratio of coal, and alleviated environmental pollution.
Embodiment
The specific embodiment that provides below in conjunction with the contriver describes in further detail the present invention.
According to technical scheme of the present invention, the combustion-supporting sulfur-fixing agent that the present invention makes is a kind of with alkaline earth metal cpds (CaCO
3) be staple, and formulated by weight percentage with an amount of some metallic compounds of interpolation, concrete composition such as table 1.
Table 1: rotary kiln coal powder injection combustion-supporting solid sulfide agent prescription
| Composition | CaCO 3 | ?La 2O 3 | ?FeCl 3 | ?CuCl 2·H 2O | ?KCl | ?MnO 2 |
| Content wt% | 20～40 | ?15～25 | ?15～25 | ?5～15 | ?5～15 | ?5～15 |
The working method of above-mentioned rotary kiln coal powder injection combustion-supporting sulfur-fixing agent is, according to each chemical ingredients of prescription weighing, mixes through churned mechanically mode, uses 2% NaCO then
3Solution is modified, jets in rotary kiln again with after coal dust mixes.
Below be the embodiment that the contriver provides, these embodiment are some preferable examples, the invention is not restricted to these embodiment, in the scope that the present invention provides, all can reach the object of the invention according to experiment showed, of applicant.
Embodiment 1:
Mining industry ltd is an example with big Xigou ditch, Shaanxi, uses the rotary kiln coal powder injection combustion-supporting sulfur-fixing agent that is used for of the present invention, according to the system component preparation combustion-supporting sulfur-fixing agent of following table combustion-supporting sulfur-fixing agent.
Embodiment 1: combustion-supporting sulfur-fixing agent system component proportioning
| Composition | CaCO 3 | ?La 2O 3 | ?FeCl 3 | ?CuCl 2·H 2O | ?KCl | ?MnO 2 |
| Content wt% | 30 | ?20 | ?20 | ?10 | ?5 | ?15 |
Carry out mechanical stirring after the mixing, using concentration then is 2% NaCO
3Solution carries out modified.Modified process is: earlier with 2% NaCO
3Solution soaking combustion-supporting sulfur-fixing agent 10min～15min toasts 30min～60min with roaster then under 150～250 ℃ of conditions.
During use, the ratio in 0.8% is mixed combustion-supporting sulfur-fixing agent in institute's Coal powder spray and is got final product.
Add after the combustion-supporting sulfur-fixing agent, record: the point of ignition of coal has reduced by 36 ℃, and rate of combustion has improved 5%, and 1 ton of iron ore of roasting reduces pulverized coal consumption 12kg, and sulfur-fixing rate reaches 58%, reduces sulfur dioxide emissions 45%.
Embodiment 2:
Mining industry ltd is an example with big Xigou ditch, Shaanxi, uses the rotary kiln coal powder injection combustion-supporting sulfur-fixing agent that is used for of the present invention, according to the system component preparation combustion-supporting sulfur-fixing agent of following table combustion-supporting sulfur-fixing agent.
Embodiment 2 combustion-supporting sulfur-fixing agent system component proportionings
| Composition | CaCO 3 | ?La 2O 3 | ?FeCl 3 | ?CuCl 2·H 2O | ?KCl | ?MnO 2 |
| Content wt% | 40 | ?10 | ?15 | ?5 | ?15 | ?15 |
Carry out mechanical stirring after the mixing, using concentration then is 2% NaCO
3Solution is modified.Modified process is: earlier with 2% NaCO
3Solution soaking combustion-supporting sulfur-fixing agent 10min～15min toasts 30～60min with roaster then under 150 ℃～250 ℃ conditions.
During use, the ratio in 2% is mixed combustion-supporting sulfur-fixing agent in institute's Coal powder spray and is got final product.
Add after the combustion-supporting sulfur-fixing agent, record: the point of ignition of coal has reduced by 45 ℃, and rate of combustion has improved 8%, and roasting ton iron ore reduces coal dust amount 15kg, and sulfur-fixing rate reaches 62%, reduces sulfur dioxide emissions 49%.
Claims (2)
1. a combustion-supporting sulfur-fixing agent that is used for rotary kiln coal powder injection is characterized in that, this combustion-supporting sulfur-fixing agent that makes is prepared by following chemical ingredients by weight percentage: CaCO
3: 20%～40%, La
2O
3: 15%～25%, FeCl
3: 15%～25%, CuCl
2H
2O:5%～15%, KCl:5%～15%, MnO
2: 5%～15%; The weight percent sum of chemical ingredients is 100%, and after above-mentioned chemical ingredients was mixed according to formula rate, using concentration then was 2% NaCO
3The modified combustion-supporting sulfur-fixing agent that obtains of solution.
2. the combustion-supporting sulfur-fixing agent that is used for rotary kiln coal powder injection as claimed in claim 1 is characterized in that, this combustion-supporting sulfur-fixing agent that makes is prepared by following chemical ingredients by weight percentage: CaCO
3: 30%, La
2O
3: 20%, FeCl
3: 20%, CuCl
2H
2O:10%, KCl:5%, MnO
2: 15%, after above-mentioned chemical ingredients mixed according to formula rate, using concentration then was 2% NaCO
3The modified combustion-supporting sulfur-fixing agent that obtains of solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100231293A CN101597533B (en) | 2009-06-30 | 2009-06-30 | Combustion-supporting sulfur-fixing agent used in rotary kiln coal powder injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100231293A CN101597533B (en) | 2009-06-30 | 2009-06-30 | Combustion-supporting sulfur-fixing agent used in rotary kiln coal powder injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101597533A CN101597533A (en) | 2009-12-09 |
| CN101597533B true CN101597533B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100231293A Expired - Fee Related CN101597533B (en) | 2009-06-30 | 2009-06-30 | Combustion-supporting sulfur-fixing agent used in rotary kiln coal powder injection |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108059992A (en) * | 2017-11-15 | 2018-05-22 | 绵阳双甘科技有限公司 | A kind of ENERGY-SAVING AGENT FOR and its manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4148613A (en) * | 1977-12-27 | 1979-04-10 | Atlantic Richfield Company | Process for preparing sulfur-containing coal or lignite for combustion |
| CN1401747A (en) * | 2002-10-10 | 2003-03-12 | 燕民才 | Spray blowing coal powder catalytic combustion adjuvant for blast furnace, and production method thereof |
-
2009
- 2009-06-30 CN CN2009100231293A patent/CN101597533B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4148613A (en) * | 1977-12-27 | 1979-04-10 | Atlantic Richfield Company | Process for preparing sulfur-containing coal or lignite for combustion |
| CN1401747A (en) * | 2002-10-10 | 2003-03-12 | 燕民才 | Spray blowing coal powder catalytic combustion adjuvant for blast furnace, and production method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 巨建涛等.高炉喷吹煤粉添加助燃剂的研究.《钢铁研究》.2008,第36卷(第3期),第36-39页. * |
| 张朝晖等.高炉喷煤添加剂.《甘肃冶金》.张朝晖,2007,第29卷(第6期),第10-13页. * |
| 欧阳德刚等.煤燃烧催化剂的研究现状与发展方向的分析.《钢铁研究》.2004,(第4期),第1-4，7页. * |
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| CN101597533A (en) | 2009-12-09 |
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Granted publication date: 20121114 Termination date: 20130630 |