CN103708808A - Sintering flue gas semi-dry desulfurization ash autoclaved brick and production method therefor - Google Patents
Sintering flue gas semi-dry desulfurization ash autoclaved brick and production method therefor Download PDFInfo
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- CN103708808A CN103708808A CN201310653136.8A CN201310653136A CN103708808A CN 103708808 A CN103708808 A CN 103708808A CN 201310653136 A CN201310653136 A CN 201310653136A CN 103708808 A CN103708808 A CN 103708808A
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- sinter fume
- dry desulphurization
- desulphurization ash
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Abstract
The invention relates to a sintering flue gas semi-dry desulfurization ash autoclaved brick and a production method therefor. The method comprises the following steps: sintering flue gas semi-dry desulfurization ash is subjected to catalytic oxidation at a low temperature; the treated desulfurization ash, stone chips, fly ash and/or cement are stirred in a stirrer; water is added; after the mixture is stirred uniformly, compression molding is carried out in a molding device; the above products are sent to an autoclave and steam curing is performed; curing is carried out. The problem of reutilization of sintering flue gas semi-dry desulfurization ash is solved, the finished product rate of the obtained products is high, and performances are good and stable.
Description
Technical field
The present invention relates to the utilization of industrial solid waste residue resource, be specifically related to a kind of sinter fume semi-dry desulphurization ash autoclaved brick and production method thereof.
Background technology
Steel industry is resource highly dense type industry, is materials consumption rich and influential family, is also one of main topsoil industry.Iron And Steel Industry will keep Sustainable development, just must reduce the pollution to environment, and reduce SO
2discharge is one of key link wherein.In present steel industry, SO
2discharge is mainly derived from sintering circuit.At present domestic and international application is a lot of in industrial fume desulphurization method, can be divided three classes generally: with wet desulphurization, the absorbent slurry spraying of aqueous solutions of absorbent washing flue gas, inhale sulphur and dry semi-dry desulphurization and directly spray the dry desulfurization of calcium base sorbing agent powder.Wet desulphurization gypsum mainly be take terra alba as main, and its content can reach more than 90%, and comprehensive utilization is relatively easy.(partly), dry-process desulfurized ash was generally by CaSO
31/2H
2o, CaSO
42H
2o, the complete Ca (OH) of unreacted
2with compositions such as a small amount of foreign material, utilize very difficult.But because desulphurize fly ash has dry powder, water consumption rate is low, floor space is little, the advantage such as reduced investment, running cost be low, (partly) desulfurization by dry method has overcome some problem and shortage of wet desulfurizing process well, thereby has better development prospect at Steel Industrial.Consequent sinter fume (partly) dry-process desulfurized ash will be Universal Problems.(partly), dry-process desulfurized ash was generally by CaSO
31/2H
2o, CaSO
42H
2o, the complete Ca (OH) of unreacted
2with compositions such as a small amount of foreign material, utilize very difficultly, generally all discard in stockyard, not only occupy a large amount of soils but also bring serious environmental pollution.
Sinter fume semi-dry desulphurization ash is a kind of novel solid waste.And for this novel solid waste, also do not have substantial research work at present, : mono-kind of Chinese invention patent application < < utilizes the method > > (publication number CN101172789) of sintered flue gas desulfurization gypsum operating mine slag cement by blast-furnace slag only to have in the industry the patent of the method for utilizing sintered flue gas desulfurization gypsum operating mine slag cement to occur, Portland clinker, sintered flue gas desulfurization gypsums etc. are prepared slag cement (blast-furnace slag 40%～60%, Portland clinker 34%～56%, sintered flue gas desulfurization gypsum 4%～6%), its shortcoming is that desulfurated plaster does not pass through the pre-ratios such as any oxidation, unsettled CaSO
31/2H
2the impurity such as O can affect the performance of slag cement, and its product stability can not get guarantee, and sintered flue gas desulfurization gypsum volume is on the low side simultaneously, therefore have not yet to see extensive production application.
Summary of the invention
The object of the present invention is to provide a kind of sinter fume semi-dry desulphurization ash autoclaved brick and production method thereof, solve above-mentioned sinter fume semi-dry desulphurization ash resource utilization problem, the finished product rate obtaining is high, functional and stable.
Concrete technical scheme is as follows:
A sinter fume semi-dry desulphurization ash autoclaved brick, adopts according to quality proportioning: 30-47% grain slag, and 15-25% flyash, and 5-20% sinter fume semi-dry desulphurization ash is prepared from, wherein, sinter fume semi-dry desulphurization ash is through catalyzed oxidation.
Further, the river sand that also contains 20% stone quarry rubble and/or 20%.
Further, also contain 3-6% cement and/or 3% polyvinyl alcohol.
Further, stone quarry rubble is stone nitre.
Further, it is solid brick, hollow brick or Brick with blind hole.
The production method of above-mentioned sinter fume semi-dry desulphurization ash autoclaved brick, sinter fume semi-dry desulphurization ash raw material is through catalyzed oxidation pre-treatment, part CaSO
31/2H
2o is oxidized to CaSO
4.
Further, add catalyzer and water, under cold condition, sinter fume semi-dry desulphurization ash raw material most of CaSO in catalytic oxidation process
31/2H
2o is oxidized to CaSO
4.
Further, main raw material adopts sinter fume semi-dry desulphurization ash or grain slag, and/or, add flyash or zeolite, and/or, add binding agent, and/or, aggregate added.
Further, binding agent is cement or polyvinyl alcohol, the rubble that aggregate is stone quarry, river sand, cast used sand or slag.
Further, comprise the steps:
(1) sinter fume semi-dry desulphurization ash is carried out under cold condition to catalyzed oxidation;
(2) desulphurize fly ash after treatment, stone nitre, flyash and/or cement are stirred in stirrer;
(3) add water;
(4) stir after compression moulding on molding device;
(5) send in autoclave steam-cured;
(6) maintenance.
Compare with currently available technology, in sinter fume of the present invention (partly) dry-process desulfurized ash autoclaved brick, produce sinter fume (partly) the dry-process desulfurized ash raw material of brick through the pre-treatment of catalyzed oxidation, formula is through optimizing, therefore, resistance to compression, anti-folding, good frost resistance, good stability.Only need add a small amount of catalyzer and water, under certain cold condition, sinter fume (partly) dry-process desulfurized ash raw material unsettled CaSO of most of character in catalytic oxidation process
31/2H
2o has been oxidized to CaSO
4, make feedstock property more stable.Like this, can greatly increase utilizability and the usage quantity of sinter fume (partly) dry-process desulfurized ash.
Embodiment
Describe the present invention below, it is a kind of preferred embodiment in numerous embodiments of the present invention.
The present embodiment need not consume in a large amount of additional substances and too much external energy situation effectively consumption sinter fume (partly) dry-process desulfurized ash of safety, it is the method for a kind of good comprehensive utilization sinter fume (partly) dry-process desulfurized ash, has good popularizing application prospect.
Sinter fume (partly) dry-process desulfurized ash autoclaved brick reaches the standard of MU10 level in < < autoclaved lime-sand brick > > national standard (GB11945-1999), be that mean compressive strength is more than 10MPa, average folding strength is more than 2.5MPa, mass loss rate, anti-freezing property are up to standard, freeze rear ultimate compression strength more than 8MPa, all technical indicator is qualified, can use as bearing wall.In the present invention, can effectively consume (partly) dry-process desulfurized ash, to economizing the land resource, reduce sinter fume (partly) dry-process desulfurized ash stockyard, the pollution of environment be had to positive effect.
Using the solid slags such as sinter fume (partly) dry-process desulfurized ash, grain slag as raw material, and with flyash or zeolite, a small amount of cement or polyvinyl alcohol are as binding agent.Described aggregate is rubble, river sand, cast used sand and the slag in stone quarry.
Sinter fume (partly) dry-process desulfurized ash certain moisture, have catalyzer to exist and cold condition under after catalyzed oxidation, wherein unsettled calcium sulfite oxidation becomes stable calcium sulfate, stability strengthens, and makes it to be conducive to utilize.
Autoclaved brick can be solid brick, hollow brick or Brick with blind hole.
Below in conjunction with example, the present invention is done to further detailed explanation:
Embodiment 1:(1) formula: 47% grain slag+20% flyash+20% stone nitre (belonging to stone quarry rubble)+10% sinter fume (partly) dry-process desulfurized ash+3% cement; (2) production method is: sinter fume (partly) dry-process desulfurized ash is carried out to catalyzed oxidation under cold condition, make unsettled calcium sulfite oxidation wherein become the calcium sulfate of stable in properties; Desulphurize fly ash after treatment, stone nitre, flyash and cement are stirred 10 minutes in stirrer, add water, making wet basis water ratio is 14% left and right, after stirring, on molding device, use compression moulding under 20MPa pressure, send into steam-cured 24h in autoclave, setting vapor pressure is 0.8MPa again, and steam curing temperature is 180 ℃, finally after natural curing 60d, obtain finished product, end properties reaches the requirement of salable product in relevant national standard again.
Embodiment 2:(1) formula: 45% grain slag+25% flyash+20% stone nitre+5% sinter fume (partly) dry-process desulfurized ash; (2) production method is: by the sinter fume after catalyzed oxidation under cold condition (partly) dry-process desulfurized ash, confuse stone nitre, flyash and cement stirs 10 minutes in stirrer, add water, making wet basis water ratio is 13% left and right, after stirring, on molding device, use compression moulding under 40MPa pressure, then send into steam-cured 10h in autoclave, setting vapor pressure is 0.8MPa, steam curing temperature is 180 ℃, finally after natural curing 14d, obtains finished product again.
Embodiment 3:(1) formula: 35% grain slag+25% flyash+20% stone nitre+15% sinter fume (partly) dry-process desulfurized ash+5% cement; (2) production method is: by the sinter fume after catalyzed oxidation under cold condition (partly) dry-process desulfurized ash, confuse stone nitre, flyash and cement stirs 10 minutes in stirrer, add water, making wet basis water ratio is 15% left and right, after stirring, on molding device, use compression moulding under 40MPa pressure, then send into steam-cured 24h in autoclave, setting vapor pressure is 0.8MPa, steam curing temperature is 180 ℃, finally after natural curing 60d, obtains finished product again.
Embodiment 4:(1) formula: 30% grain slag+24% flyash+20% river sand+20% sinter fume (partly) dry-process desulfurized ash+6% cement; (2) production method is: by the sinter fume after catalyzed oxidation under cold condition (partly) dry-process desulfurized ash, confuse stone nitre, flyash and cement stirs 10 minutes in stirrer, add water, making wet basis water ratio is 16% left and right, after stirring, on molding device, use compression moulding under 40MPa pressure, then send into steam-cured 24h in autoclave, setting vapor pressure is 0.8MPa, steam curing temperature is 180 ℃, finally after natural curing 60d, obtains finished product again.
Embodiment 5:(1) formula: 42% grain slag+15% flyash+10% zeolite+20% cast used sand+5% sinter fume (partly) dry-process desulfurized ash+3% polyvinyl alcohol; (2) production method is: by the sinter fume after catalyzed oxidation under cold condition (partly) dry-process desulfurized ash, confuse stone nitre, flyash and cement stirs 10 minutes in stirrer, add water, making wet basis water ratio is 13% left and right, after stirring, on molding device, use compression moulding under 80MPa pressure, then send into steam-cured 8h in autoclave, setting vapor pressure is 0.8MPa, steam curing temperature is 180 ℃, finally after natural curing 7d, obtains finished product again
Above the present invention is exemplarily described; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as the various improvement that adopted method of the present invention design and technical scheme to carry out, or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (10)
1. a sinter fume semi-dry desulphurization ash autoclaved brick, is characterized in that, adopts according to quality proportioning: 30-47% grain slag, 15-25% flyash, and 5-20% sinter fume semi-dry desulphurization ash is prepared from, wherein, sinter fume semi-dry desulphurization ash is through catalyzed oxidation.
2. sinter fume semi-dry desulphurization ash autoclaved brick as claimed in claim 1, is characterized in that, also contains the river sand of 20% stone quarry rubble and/or 20%.
3. sinter fume semi-dry desulphurization ash autoclaved brick as claimed in claim 1 or 2, is characterized in that, also contains 3-6% cement and/or 3% polyvinyl alcohol.
4. sinter fume semi-dry desulphurization ash autoclaved brick as claimed in claim 2, is characterized in that, stone quarry rubble is stone nitre.
5. the sinter fume semi-dry desulphurization ash autoclaved brick as described in any one in claim 1-4, is characterized in that, it is solid brick, hollow brick or Brick with blind hole.
6. the production method of sinter fume semi-dry desulphurization ash autoclaved brick as described in claim 1-5, is characterized in that, sinter fume semi-dry desulphurization ash raw material is through catalyzed oxidation pre-treatment, part CaSO
31/2H
2o is oxidized to CaSO
4.
7. the production method of sinter fume semi-dry desulphurization ash autoclaved brick as claimed in claim 6, is characterized in that, adds catalyzer and water, under cold condition, and sinter fume semi-dry desulphurization ash raw material most of CaSO in catalytic oxidation process
31/2H
2o is oxidized to CaSO
4.
8. the production method of sinter fume semi-dry desulphurization ash autoclaved brick as described in claim 6 or 7, is characterized in that, main raw material adopts sinter fume semi-dry desulphurization ash or grain slag, and/or, add flyash or zeolite, and/or, add binding agent, and/or, aggregate added.
9. the production method of sinter fume semi-dry desulphurization ash autoclaved brick as claimed in claim 8, is characterized in that, binding agent is cement or polyvinyl alcohol, the rubble that aggregate is stone quarry, river sand, cast used sand or slag.
10. the production method of sinter fume semi-dry desulphurization ash autoclaved brick as described in claim 6-9, is characterized in that, comprises the steps:
(1) sinter fume semi-dry desulphurization ash is carried out under cold condition to catalyzed oxidation;
(2) desulphurize fly ash after treatment, stone nitre, flyash and/or cement are stirred in stirrer;
(3) add water;
(4) stir after compression moulding on molding device;
(5) send in autoclave steam-cured;
(6) maintenance.
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|---|---|---|---|
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|---|---|---|---|
| CN201310653136.8A CN103708808B (en) | 2013-12-06 | 2013-12-06 | A kind of sinter fume semi-dry desulphurization ash autoclaved brick and production method thereof |
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| CN103708808B CN103708808B (en) | 2015-11-18 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003690A (en) * | 2014-06-08 | 2014-08-27 | 太原钢铁(集团)有限公司 | Chromium slag fly ash autoclaved bricks and preparation method thereof |
| CN105016692A (en) * | 2015-07-07 | 2015-11-04 | 重庆大学 | Solid waste recycling process for preparing steam-cured bricks by using high calcium sulfite desulfurization ash |
| CN105294154A (en) * | 2015-11-27 | 2016-02-03 | 大连善水德环保科技有限公司 | High-recycling steam pressurized concrete block and preparation method thereof |
| CN105669124A (en) * | 2016-01-07 | 2016-06-15 | 湖北东元坤新型建材有限公司 | Autoclaved fly ash solid brick |
| CN106316443A (en) * | 2015-06-30 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Fly ash aerated concrete blocks with sinter-dried desulfurization ash and preparation method thereof |
| CN113213799A (en) * | 2021-06-24 | 2021-08-06 | 马鞍山钢铁股份有限公司 | Preparation method of slag micropowder |
| CN114988779A (en) * | 2022-05-05 | 2022-09-02 | 克拉玛依市聚能资源综合利用有限责任公司 | Method for preparing baking-free building material by using circulating fluidized bed ash and slag as main raw materials |
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| CN101734875A (en) * | 2009-12-28 | 2010-06-16 | 华北电力大学（保定） | Method for catalytic oxidation of calcium sulfite in desulphurization ash by dry method and semi-dry method |
| CN102659389A (en) * | 2012-04-12 | 2012-09-12 | 暨南大学 | Steam-cured brick and its preparation method |
-
2013
- 2013-12-06 CN CN201310653136.8A patent/CN103708808B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734875A (en) * | 2009-12-28 | 2010-06-16 | 华北电力大学（保定） | Method for catalytic oxidation of calcium sulfite in desulphurization ash by dry method and semi-dry method |
| CN102659389A (en) * | 2012-04-12 | 2012-09-12 | 暨南大学 | Steam-cured brick and its preparation method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003690A (en) * | 2014-06-08 | 2014-08-27 | 太原钢铁(集团)有限公司 | Chromium slag fly ash autoclaved bricks and preparation method thereof |
| CN106316443A (en) * | 2015-06-30 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Fly ash aerated concrete blocks with sinter-dried desulfurization ash and preparation method thereof |
| CN105016692A (en) * | 2015-07-07 | 2015-11-04 | 重庆大学 | Solid waste recycling process for preparing steam-cured bricks by using high calcium sulfite desulfurization ash |
| CN105294154A (en) * | 2015-11-27 | 2016-02-03 | 大连善水德环保科技有限公司 | High-recycling steam pressurized concrete block and preparation method thereof |
| CN105669124A (en) * | 2016-01-07 | 2016-06-15 | 湖北东元坤新型建材有限公司 | Autoclaved fly ash solid brick |
| CN113213799A (en) * | 2021-06-24 | 2021-08-06 | 马鞍山钢铁股份有限公司 | Preparation method of slag micropowder |
| CN114988779A (en) * | 2022-05-05 | 2022-09-02 | 克拉玛依市聚能资源综合利用有限责任公司 | Method for preparing baking-free building material by using circulating fluidized bed ash and slag as main raw materials |
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| CN103708808B (en) | 2015-11-18 |
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