CN104649704A - Method for producing ceramsite for heat-insulating building block by utilizing hot splashing steel slags - Google Patents
Method for producing ceramsite for heat-insulating building block by utilizing hot splashing steel slags Download PDFInfo
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- CN104649704A CN104649704A CN201510076865.0A CN201510076865A CN104649704A CN 104649704 A CN104649704 A CN 104649704A CN 201510076865 A CN201510076865 A CN 201510076865A CN 104649704 A CN104649704 A CN 104649704A
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Abstract
The invention discloses a method for producing ceramsite for a heat-insulating building block by utilizing hot splashing steel slags. The method comprises the following steps: (1) weighing raw materials by mass; (2) mixing and grinding the raw materials into powder in a grinder and then stirring and uniformly mixing in a stirrer to obtain a mixed material; (3) putting the mixed material in a balling tray, adding water and rotating the balling tray to ball the material; (4) putting a spherical raw material in a drying system, heating the pellet temperature and then drying; (5) performing crude roasting by adopting a rotary kiln; and (6) finally roasting at a high temperature and cooling to obtain steel slag ceramsite. Hollow building blocks produced by the method have the performances of being heat-insulating, resistant to quake, resistant to freezing, fireproof and the like; moreover, the problem of environmental pollution caused by stacking of steel slags at present is solved; the additional value of steel slag utilization is increased; meanwhile, the production method is simple in process, energy-saving, environment-friendly and low in cost.
Description
Technical field
The invention belongs to metallurgical slag Treatment and recovery and utilize technical field, specifically refer to a kind of method utilizing hot splashing steel slag to produce insulation blocks haydite.
Background technology
In general, the preparation preparation method of haydite has sintered type, high temperature heat expansion type and burning free type.Before the present invention, the patent No. is that the patent of invention of 201210115005.X discloses a kind of flyash in great mixed amount haydite and prepares the method for holllow building block; The patent No. be 201310123385.6 patent of invention disclose one boron mud/loess and make ceramsite concrete hollow insulation block; The patent No. be 201310123432.7 patent of invention disclose a kind of method that gangue/kaolin prepares ceramsite concrete hollow insulation block.These patent documentations aforesaid all breach the restriction that shale raw material selected by original insulating brick, use flyash equal industrial residue instead of clay or shale, but, the haydite produced according to their processing methodes has the deficiency of dry shrinkage and cracking, trace it to its cause, mainly these patented methods adopt inorganic industrial waste residue mainly to serve as filler, active low, and after pyroreaction, aquation forms the things such as ettringite and compares difficulty again.
And slag there is no report at present as the utilisation technology of haydite materials, this may have following reason: 1) slag particularly in hot splashing steel slag containing the unstable constituents such as free calcium oxide and magnesium oxide, may ftracture when haydite materials balling-up; 2) slag contains a certain amount of ferriferous oxide, and when slag haydite burns till, temperature control is more difficult.But steel slag hot splashing technique is the Technology of Steel Slag Processing that certain cost is extremely low, and it is higher that it contains calcareous composition, be conducive to saving the binding agent in haydite; Slag has the similar thing phase composition of cement, is often referred to as burning cement, can reduces the consumption of bonding agent during its balling-up; The firing temperature of haydite can be reduced in slag containing ferrous components, thus reduce the cost fired, can prevent burn-off phenomenon from occurring by the calcining system controlling science.Even more important, slag particularly hot application baking ceramsite can overcome slag is limited a use for a long time difficult problem in cement concrete field, thus improves slag comprehensive utilization rate, reduces slag and piles up.
Summary of the invention
The object of the invention is to provide a kind of method utilizing hot splashing steel slag to produce insulation blocks haydite, with the holllow building block that the method is produced, there is insulation, antidetonation, the performance such as freeze proof, fire-resistant, and solve current slag pile up and the problem of contaminate environment, improve the added value of steel slag utilization, simultaneously, this production method technique is simple, and energy-conserving and environment-protective are with low cost.
For realizing stating object, the present invention utilizes hot splashing steel slag to produce the method for insulation blocks haydite, comprises the following steps:
1) raw material is taken by mass, wherein, hot splashing steel slag tailings 45 ~ 65 parts, industrial gypsum 12 ~ 18 parts, pozzolanic material 10 ~ 25 parts, wilkinite 10 ~ 25 parts, swelling agent 0.5 ~ 2 part;
2) raw material mix grinding in shredder is become 150 ~ 250 order powder, then in stirrer, stir 15 ~ 18min, mix to obtain mixture;
3) mixture is put into pan-pelletizer, adding quality is 8 ~ 10 parts, and rotate pan-pelletizer and make material balling-up, pellet diameter is 2 ~ 10mm;
4) spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 60 ~ 70 DEG C, then dry, stoving oven temperature 125 ~ 250 DEG C, drying time 90 ~ 110min;
5) rotary kiln is then adopted to carry out 600 ~ 700 DEG C of raw burn 40 ~ 90min;
6) last at 950 ~ 1250 DEG C of high-temperature roasting 20 ~ 45min, after cooling, namely obtain slag haydite.
Preferably, in described hot splashing steel slag tailings, metal Ferrum content is less than 1%, and median size is 0.01 ~ 9.5mm.Described hot splashing steel slag tailings is the tailings of hot splashing steel slag after fragmentation, magnetic separation.
Further, described industrial gypsum is one or more in desulfurated plaster, phosphogypsum, fluorgypsum, sintering desulfuration ash.
Further, described wilkinite is sodium bentonite, and namely natural montmorillonite is through the sodium bentonite of sodium process.
Again further, described pozzolanic material is one or several in ground granulated blast furnace slag, silicate cement, flyash and high-calcium fly ass.
Also further, described swelling agent is one or several in aluminum oxide powder, carbonate, powdered carbon, sodium lauryl sulphate.
Also preferably, step 2) in, during described stirring, speed is 200 ~ 250r/min.
Again preferably, step 3) in, pan-pelletizer rotating speed 30 ~ 45r/min, 45 ~ 55 °, angle of inclination.
Adopt technical scheme provided by the invention, compared with existing known technology, there is following unusual effect:
(1) make use of hot splashing steel slag, industrial gypsum, volcanic ash material waste material as the raw material of synthesizing ceramsite large dosage of the present invention, the industrial wastes such as hot splashing steel slag are recycled, and effectively reduce the production cost of heat-preserving ceramsite, make the industrial wastes such as hot splashing steel slag get utilization simultaneously;
(2) contain the oxide compound of iron in the main raw material hot splashing steel slag that the present invention adopts, can maturing temperature be reduced when high-temperature roasting, thus provide further relative savings the energy.
(3) the present invention prepares the environmental pollution that hot splashing steel slag haydite effectively prevent slag, is conducive to Ecological Civilization Construction.
Embodiment
Below in conjunction with specific embodiment, the method utilizing hot splashing steel slag to produce insulation blocks haydite of the present invention is further described.
Embodiment one
Utilize hot splashing steel slag to produce a method for insulation blocks haydite, it comprises the following steps:
1) raw material is taken by mass: hot splashing steel slag tailings 45 parts, industrial gypsum 12 parts, pozzolanic material 25 parts, wilkinite 16 parts, swelling agent 2 parts; Wherein, hot splashing steel slag tailings is the tailings of hot splashing steel slag after fragmentation, magnetic separation, and its metal Ferrum content is less than 1%, and median size is 8.5mm; Industrial gypsum is desulfurated plaster; Wilkinite is sodium bentonite, and namely natural montmorillonite is through the sodium bentonite of sodium process; Pozzolanic material is ground granulated blast furnace slag; Swelling agent is aluminum oxide powder;
2) raw material mix grinding in shredder is become 200 order powder, then in stirrer, stir 15min, stirring velocity is 200r/min, mixes to obtain mixture;
3) mixture is put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding quality is 10 parts, makes material globulate.45 °, pan-pelletizer rotating speed 30r/min, angle of inclination, pellet diameter is 5mm;
4) spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 65 DEG C, then dry, stoving oven temperature 150 DEG C, drying time 90min;
5) then enter rotary kiln and carry out 600 ~ 700 DEG C of raw burn 60min;
6) last at 1210 DEG C of high-temperature roasting 25min, after cooling, namely obtain slag haydite.
After the described insulation blocks haydite of acquisition, measure performance index such as the tap density of insulation blocks haydite, ultimate compression strength and 1h water-intake rates, its tap density is 423kg/m
3, ultimate compression strength is 6.3MPa, 1h water-intake rate is 3.45%, and property indices is excellent.Meanwhile, because the present embodiment employs the hot splashing steel slag tailings of 45 parts, the rate of utilization of hot splashing steel slag tailings is improved, thus can effectively reduces haydite production cost, and the haydite excellent property produced, good heat insulating.
Embodiment two
Utilize hot splashing steel slag to produce a method for insulation blocks haydite, it comprises the following steps:
1) raw material is taken by mass: hot splashing steel slag tailings 50 parts, industrial gypsum 12 parts, pozzolanic material 18 parts, wilkinite 18 parts, swelling agent 2 parts; Wherein, hot splashing steel slag tailings is the tailings of hot splashing steel slag after fragmentation, magnetic separation, and its metal Ferrum content is less than 1%, and median size is 4.75mm; Industrial gypsum is sintering desulfuration ash; Wilkinite is sodium bentonite, and namely natural montmorillonite is through the sodium bentonite of sodium process; Pozzolanic material is flyash; Swelling agent is powdered carbon;
2) raw material mix grinding in shredder is become 200 order powder, then in stirrer, stir 15min, stirring velocity is 200r/min, mixes to obtain mixture;
3) mixture is put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding quality is 8 parts, makes material globulate.55 °, pan-pelletizer rotating speed 45r/min, angle of inclination, pellet diameter is 5mm;
4) spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 65 DEG C, then dry, stoving oven temperature 180 DEG C, drying time 100min;
5) then enter rotary kiln and carry out 650 DEG C of raw burn 55min;
6) last at 1210 DEG C of high-temperature roasting 23min, after cooling, namely obtain slag haydite.
After acquisition insulation blocks haydite, measure performance index such as the tap density of insulation blocks haydite, ultimate compression strength and 1h water-intake rates, its tap density is 449kg/m
3, ultimate compression strength is 4.9MPa, 1h water-intake rate is 1.35%, and property indices is excellent.Meanwhile, owing to employing the hot splashing steel slag tailings of 50 parts in the present embodiment, the rate of utilization of hot splashing steel slag tailings is improved, thus can effectively reduces haydite production cost, and the haydite excellent property produced, good heat insulating.
Embodiment three
Utilize hot splashing steel slag to produce a method for insulation blocks haydite, it comprises the following steps:
1) raw material is taken by mass: hot splashing steel slag tailings 56 parts, industrial gypsum 13 parts, pozzolanic material 19 parts, wilkinite 10 parts, swelling agent 2 parts; Hot splashing steel slag tailings is the tailings of hot splashing steel slag after fragmentation, magnetic separation, and its metal Ferrum content is less than 1%, and median size is 4.5mm; Industrial gypsum is the mixture of desulfurated plaster and phosphogypsum; Wilkinite is sodium bentonite, and namely natural montmorillonite is through the sodium bentonite of sodium process; Pozzolanic material is ground granulated blast furnace slag; Swelling agent is sodium lauryl sulphate.
2) raw material mix grinding in shredder is become 200 order powder, then in stirrer, stir 18min, stirring velocity is 200r/min, mixes to obtain mixture;
3) mixture is put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding quality is 10 parts, makes material globulate.45 °, pan-pelletizer rotating speed 30r/min, angle of inclination, pellet diameter is 5mm;
4) spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 65 DEG C, then dry, stoving oven temperature 200 DEG C, drying time 100min;
5) then enter rotary kiln and carry out 650 DEG C of raw burn 70min;
6) last at 1180 DEG C of high-temperature roasting 29min, after cooling, namely obtain slag haydite.
Measure performance index such as the tap density of insulation blocks haydite obtained, ultimate compression strength and 1h water-intake rates, its tap density is 447kg/m
3, ultimate compression strength is 3.9MPa, 1h water-intake rate is 1.24%, and property indices is excellent.Meanwhile, because the present embodiment employs the hot splashing steel slag tailings of 56 parts, the rate of utilization of hot splashing steel slag tailings is improved, thus can effectively reduces haydite production cost, and the haydite excellent property produced, good heat insulating.
Embodiment four
Utilize hot splashing steel slag to produce a method for insulation blocks haydite, it comprises the following steps:
1) raw material is taken by mass: hot splashing steel slag tailings 58 parts, industrial gypsum 12 parts, pozzolanic material 18 parts, wilkinite 10 parts, swelling agent 2 parts; Wherein, hot splashing steel slag tailings is the tailings of hot splashing steel slag after fragmentation, magnetic separation, and its metal Ferrum content is less than 1%, and median size is 8.5mm; Industrial gypsum is fluorgypsum; Wilkinite is sodium bentonite, and namely natural montmorillonite is through the sodium bentonite of sodium process; Pozzolanic material is the mixture of silicate cement and ground granulated blast furnace slag; Swelling agent is the mixture of aluminum oxide powder and powdered carbon;
2) raw material mix grinding in shredder is become 250 order powder, then in stirrer, stir 16min, stirring velocity is 200r/min, mixes to obtain mixture;
3) mixture is put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding quality is 10 parts, makes material globulate.48 °, pan-pelletizer rotating speed 40r/min, angle of inclination, pellet diameter is 5mm;
4) spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 65 DEG C, then dry, stoving oven temperature 180 DEG C, drying time 100min;
5) then enter rotary kiln and carry out 650 DEG C of raw burn 70min;
6) last at 1150 DEG C of high-temperature roasting 21min, after cooling, namely obtain slag haydite.
Measure performance index such as the tap density of insulation blocks haydite obtained, ultimate compression strength and 1h water-intake rates, measuring the tap density obtaining described hot splashing steel slag heat-preserving ceramsite is 551kg/m
3, ultimate compression strength is 4.25MPa, 1h water-intake rate is 1.86%, and property indices is excellent.Meanwhile, because embodiment employs the hot splashing steel slag tailings of 58 parts, the rate of utilization of hot splashing steel slag tailings is improved, thus can effectively reduces haydite production cost, and the haydite excellent property produced, good heat insulating.
Embodiment five
Utilize hot splashing steel slag to produce a method for insulation blocks haydite, it comprises the following steps:
1) raw material is taken by mass: hot splashing steel slag tailings 65 parts, industrial gypsum 12 parts, pozzolanic material 16.5 parts, wilkinite 5 parts, swelling agent 1.5 parts; Wherein, hot splashing steel slag tailings is the tailings of hot splashing steel slag after fragmentation, magnetic separation, and its metal Ferrum content is less than 1%, and median size is 6.5mm; Industrial gypsum is the mixture of sintering desulfuration ash and desulfurated plaster; Wilkinite is sodium bentonite, and namely natural montmorillonite is through the sodium bentonite of sodium process; Pozzolanic material is the mixture of high-calcium fly ass and flyash; Swelling agent is powdered carbon;
2) raw material mix grinding in shredder is become 250 order powder, then in stirrer, stir 15min, stirring velocity is 250r/min, mixes to obtain mixture;
3) mixture is put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding quality is 10 parts, makes material globulate.55 °, pan-pelletizer rotating speed 45r/min, angle of inclination, pellet diameter is 10mm;
4) spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 65 DEG C, then dry, stoving oven temperature 250 DEG C, drying time 100min;
5) then enter rotary kiln and carry out 650 DEG C of raw burn 60min, finally at 1250 DEG C of high-temperature roasting 20min, after cooling, namely obtain slag haydite.
Measure the tap density of obtained insulation blocks haydite, the performance index such as ultimate compression strength and 1h water-intake rate, its tap density is 618kg/m
3ultimate compression strength is 5.9MPa, 1h water-intake rate is 4.18%, property indices is excellent, meanwhile, because the present embodiment employs the hot splashing steel slag tailings of 65 parts, the rate of utilization of hot splashing steel slag tailings is improved, thus can effectively reduce haydite production cost, and the haydite excellent property produced, good heat insulating.
Claims (8)
1. utilize hot splashing steel slag to produce a method for insulation blocks haydite, it is characterized in that: it comprises the following steps:
1) raw material is taken by mass, wherein, hot splashing steel slag tailings 45 ~ 65 parts, industrial gypsum 12 ~ 18 parts, pozzolanic material 10 ~ 25 parts, wilkinite 10 ~ 25 parts, swelling agent 0.5 ~ 2 part;
2) raw material mix grinding in shredder is become 150 ~ 250 order powder, then in stirrer, stir 15 ~ 18min, mix to obtain mixture;
3) mixture is put into pan-pelletizer, adding quality is 8 ~ 10 parts, and rotate pan-pelletizer and make material balling-up, pellet diameter is 2 ~ 10mm;
4) spherical for gained raw material are entered dehumidification system, after promoting pelletizing temperature to 60 ~ 70 DEG C, then dry, stoving oven temperature 125 ~ 250 DEG C, drying time 90 ~ 110min;
5) rotary kiln is then adopted to carry out 600 ~ 700 DEG C of raw burn 40 ~ 90min;
6) last at 950 ~ 1250 DEG C of high-temperature roasting 20 ~ 45min, after cooling, namely obtain slag haydite.
2. utilize hot splashing steel slag to produce the method for insulation blocks haydite according to claim 1, it is characterized in that: in described hot splashing steel slag tailings, metal Ferrum content is less than 1%, median size is 0.01 ~ 9.5mm.
3. according to claim 1 or 2, utilize hot splashing steel slag to produce the method for insulation blocks haydite, it is characterized in that: described industrial gypsum is one or more in desulfurated plaster, phosphogypsum, fluorgypsum, sintering desulfuration ash.
4. according to claim 1 or 2, utilize hot splashing steel slag to produce the method for insulation blocks haydite, it is characterized in that: described wilkinite is sodium bentonite.
5. according to claim 1 or 2, utilize hot splashing steel slag to produce the method for insulation blocks haydite, it is characterized in that: described pozzolanic material is one or several in ground granulated blast furnace slag, silicate cement, flyash and high-calcium fly ass.
6. according to claim 1 or 2, utilize hot splashing steel slag to produce the method for insulation blocks haydite, it is characterized in that: described swelling agent is one or several in aluminum oxide powder, carbonate, powdered carbon, sodium lauryl sulphate.
7. according to claim 1 or 2, utilize hot splashing steel slag to produce the method for insulation blocks haydite, it is characterized in that: step 2) in, during described stirring, speed is 200 ~ 250r/min.
8. according to claim 1 or 2, utilize hot splashing steel slag to produce the method for insulation blocks haydite, it is characterized in that: step 3) in, pan-pelletizer rotating speed 30 ~ 45r/min, 45 ~ 55 °, angle of inclination.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130397A (en) * | 2015-07-13 | 2015-12-09 | 昆明理工大学 | Novel ceramisite and preparation method thereof |
| CN106747600A (en) * | 2016-12-08 | 2017-05-31 | 湖北工业大学 | The sintering ceramsite and method prepared as primary raw material with phosphorus mine tailing |
| CN107500801A (en) * | 2017-09-25 | 2017-12-22 | 贵州开磷磷石膏综合利用有限公司 | A kind of heat preserving and insulating material ardealite haydite and preparation method thereof |
| CN110092601A (en) * | 2019-05-10 | 2019-08-06 | 山西大学 | A kind of unburned slow-release manufactured aggregate of steel slag base and preparation method thereof |
| CN115893981A (en) * | 2022-10-27 | 2023-04-04 | 广西奥裕环保科技有限公司 | Processing method and processing equipment for iron ore tailing ceramsite |
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| CN1066047A (en) * | 1991-04-24 | 1992-11-11 | 武汉钢铁公司 | The open hearth slag is produced the method for hollow building-block |
| CN103833315A (en) * | 2014-01-21 | 2014-06-04 | 安徽盛仁新型建材有限公司 | Antifreezing aerated brick |
| CN104193399A (en) * | 2014-08-08 | 2014-12-10 | 上海古猿人石材有限公司 | Smelting waste slag light composite artificial stone and production method thereof |
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| CN1066047A (en) * | 1991-04-24 | 1992-11-11 | 武汉钢铁公司 | The open hearth slag is produced the method for hollow building-block |
| CN103833315A (en) * | 2014-01-21 | 2014-06-04 | 安徽盛仁新型建材有限公司 | Antifreezing aerated brick |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130397A (en) * | 2015-07-13 | 2015-12-09 | 昆明理工大学 | Novel ceramisite and preparation method thereof |
| CN106747600A (en) * | 2016-12-08 | 2017-05-31 | 湖北工业大学 | The sintering ceramsite and method prepared as primary raw material with phosphorus mine tailing |
| CN106747600B (en) * | 2016-12-08 | 2019-11-08 | 湖北工业大学 | The sintering ceramsite and method prepared using phosphorus tailing as primary raw material |
| CN107500801A (en) * | 2017-09-25 | 2017-12-22 | 贵州开磷磷石膏综合利用有限公司 | A kind of heat preserving and insulating material ardealite haydite and preparation method thereof |
| CN110092601A (en) * | 2019-05-10 | 2019-08-06 | 山西大学 | A kind of unburned slow-release manufactured aggregate of steel slag base and preparation method thereof |
| CN110092601B (en) * | 2019-05-10 | 2020-07-10 | 山西大学 | Steel slag-based baking-free slow-release artificial aggregate and preparation method thereof |
| CN115893981A (en) * | 2022-10-27 | 2023-04-04 | 广西奥裕环保科技有限公司 | Processing method and processing equipment for iron ore tailing ceramsite |
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