CN1229128A - Coal-fired sulfur fixing agent containing steel slag additive - Google Patents
Coal-fired sulfur fixing agent containing steel slag additive Download PDFInfo
- Publication number
- CN1229128A CN1229128A CN 98106566 CN98106566A CN1229128A CN 1229128 A CN1229128 A CN 1229128A CN 98106566 CN98106566 CN 98106566 CN 98106566 A CN98106566 A CN 98106566A CN 1229128 A CN1229128 A CN 1229128A
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- China
- Prior art keywords
- coal
- fixing agent
- steel slag
- calcium
- sulfur fixing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
A sulfur-fixing agent for fuel coal is prepared from calcium-base sulfur-fixing agent (5-99%) and waste steel slags (1-95%) through mixing. It features high and stable high-temp sulfur-fixing efficiency (60-95% at 800 deg.C or higher) to reduce the content of SO2 in discharged gas, low cost, and simple process.
Description
The present invention relates to a kind of coal-fired sulfur fixing agent that contains steel slag additive, belong to smoke pollution control category.
At present, coal-fired sulfur fixing agent is substantially with calcium based sulphur-fixation reagent, and promptly Wingdale, lime etc. are in the majority, and its principle is that the reaction of Salmon-Saxl in calcium oxide and the fire coal generates calcium sulfate, calcium sulfite, but when high temperature (greater than 800 ℃ time), calcium sulfate, calcium sulfite decompose and discharge sulfurous gas again.So general coal-fired calcium based sulphur-fixation reagent is under greater than 800 ℃ of furnace temperature situations, its solid sulphur efficiency drops to 30-40% by 60-93%.The shortcoming of coal-fired calcium based sulphur-fixation reagent is to have the elevated temperature heat resolution problem, Gu the sulphur efficiency instability.
The objective of the invention is to provide a kind of coal-fired sulfur fixing agent that contains steel slag additive that under high-temperature condition, keeps higher solid sulphur efficiency at above-mentioned shortcoming of the prior art.
The objective of the invention is to be achieved through the following technical solutions:
It is to improve to form on the basis of existing coal-fired calcium based sulphur-fixation reagent, and it includes calcium based sulphur-fixation reagent and slag, promptly adds steel slag additive in calcium based sulphur-fixation reagent.The proportioning of calcium based sulphur-fixation reagent and slag is: (weight percent)
Calcium based sulphur-fixation reagent: 5-99%
Slag: 1-95%
Principle of work of the present invention is as follows:
In calcium based sulphur-fixation reagent, add the additive of making by discarded slag, can form one deck calcium, silicon, iron complex chemical compound on the surface of calcium sulfate that generates and calcium sulfite, under high-temperature condition, stablize and do not decompose, and can effectively suppress the decomposition of calcium sulfate and calcium sulfite, make coal-fired sulfur fixing agent under high-temperature condition, keep higher solid sulphur efficiency.
Of the present invention to be that advantage is that it has a solid sulphur efficiency stable, when high temperature (greater than 800 ℃), still can keep the solid sulphur efficiency of 60-95%, makes the SO2 emission concentration in the burning smoke flue gas reach national specified discharge standard.Simultaneously its advantage such as also to have a cost low, and complete processing is simple has significant environmental benefit and economic benefit.
Be embodiments of the invention below:
The discarded slag of Steel Plant or molding floor is processed into steel slag additive, mixes with calcium based sulphur-fixation reagent, make coal-fired sulfur fixing agent of the present invention by each embodiment ratio requirement of last table.During use, after (coal-fired sulfur fixing agent is 1-15% with the ratio of Coal-fired capacity) adds fire coal by a certain percentage, can solve present calcium based sulphur-fixation reagent elevated temperature heat resolution problem.
Claims (2)
1, a kind of coal-fired sulfur fixing agent that contains steel slag additive, it includes calcium based sulphur-fixation reagent, it is characterized in that it also includes slag.
2, sulphur-fixing agent according to claim 1 is characterized in that the proportioning of calcium based sulphur-fixation reagent and slag is: (weight percent)
Calcium based sulphur-fixation reagent: 5-99%
Slag: 1-95%
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98106566 CN1229128A (en) | 1998-03-13 | 1998-03-13 | Coal-fired sulfur fixing agent containing steel slag additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98106566 CN1229128A (en) | 1998-03-13 | 1998-03-13 | Coal-fired sulfur fixing agent containing steel slag additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1229128A true CN1229128A (en) | 1999-09-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98106566 Pending CN1229128A (en) | 1998-03-13 | 1998-03-13 | Coal-fired sulfur fixing agent containing steel slag additive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1229128A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354396C (en) * | 2005-12-13 | 2007-12-12 | 武汉理工大学 | Coal-firing efficient additive for dry cement process and its use |
| CN103539328A (en) * | 2013-10-12 | 2014-01-29 | 同济大学 | In-situ sulfur-fixing agent for sludge anaerobic digestion and its preparation method and use |
| CN104548892A (en) * | 2014-12-18 | 2015-04-29 | 昆明理工大学 | Composite sulfur-fixing agent and application thereof |
-
1998
- 1998-03-13 CN CN 98106566 patent/CN1229128A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354396C (en) * | 2005-12-13 | 2007-12-12 | 武汉理工大学 | Coal-firing efficient additive for dry cement process and its use |
| CN103539328A (en) * | 2013-10-12 | 2014-01-29 | 同济大学 | In-situ sulfur-fixing agent for sludge anaerobic digestion and its preparation method and use |
| CN103539328B (en) * | 2013-10-12 | 2015-11-18 | 同济大学 | A kind of original position sulphur-fixing agent for anaerobic sludge digestion and its production and use |
| CN104548892A (en) * | 2014-12-18 | 2015-04-29 | 昆明理工大学 | Composite sulfur-fixing agent and application thereof |
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| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |