CN102850012A - Manufacturing method of high-calcium solid sulfur ash aerated concrete building blocks - Google Patents
Manufacturing method of high-calcium solid sulfur ash aerated concrete building blocks Download PDFInfo
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- CN102850012A CN102850012A CN2012101744448A CN201210174444A CN102850012A CN 102850012 A CN102850012 A CN 102850012A CN 2012101744448 A CN2012101744448 A CN 2012101744448A CN 201210174444 A CN201210174444 A CN 201210174444A CN 102850012 A CN102850012 A CN 102850012A
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Abstract
The invention discloses a manufacturing method of high-calcium solid sulfur ash aerated concrete building blocks. According to the invention, 40-70 parts of high-calcium solid sulfur ash, 20-40 parts of fly ash, 5-12 parts of cement, 0.1-15 parts of a silicon material, 10-20 parts of lime, 0.1-2 parts of gypsum, and 0.06-0.1 parts of aluminum powder are adopted as raw materials; high-calcium solid sulfur ash, fly ash, the silicon material, and gypsum are added into a mixer; water is added to the mixer, and stirring is carried out, such that a slurry is obtained; aluminum powder, lime, and cement are added to the slurry, and the mixture is well mixed by stirring, such that a casting slurry is obtained; the casting slurry is cast into a mold, and standing and preventive maintenance are carried out; when preventive maintenance is finished, building blocks are obtained by cutting; and the building blocks are subjected to autoclaved maintenance in an autoclave, such that finished products are obtained. With the method provided by the invention, the manufactured product can hardly crack and deform, and has advantages of high compressive strength and after-freeze strength. The method provided by the invention has the advantages of simple technical process, high high-calcium solid sulfur ash utilization amount, low manufacturing cost, convenient construction, and the like.
Description
Technical field
The present invention relates to the making method of a kind of high calcium sulfur fixation ash aerated concrete building block, belong to the material of construction manufacture technology field.
Background technology
The solid sulphur ash of high calcium is the flyash that the stove internal combustion sulfur removal technology of employing circulating fluidized bed combustion discharges.Along with the fast development of science and technology, people constantly strengthen with consciousness environmental protection energy-conservation, and save energy and environment protection become the great themes of current social development.Combustion technology of circulating fluidized is a kind of novel coal technology, various inferior fuels of incendivity, such as high-sulfur dirty coal, coal gangue, mud coal, mine tailing, slag etc.This technology is one of clean coal burning, realization strategy of sustainable development modern technique.It integrate save energy, cleanburning, safe and reliable, reduce the advantage such as disposal of pollutants.Regulate to require in high, the load variations private station that variable load plant and fluctuation of load are larger frequently at underload, circulating fluidized bed technique is current optimal selection.Along with the increase of circular fluid bed quantity, the quantity discharged of the solid sulphur ash of high calcium significantly increases.Because the solid sulphur ash of high calcium water requirement is larger, self-hardening property is larger, and it is too fast to condense, easily plugging, thus when reaching same denseness, need to increase about 50% than positive usual amounts, thus cause product strength lower, and Gu the fluctuation of sulphur ash component is larger, technique controlling difficulty is larger; In addition, the free calcium oxide of the solid sulphur ash of high calcium and sulfur trioxide content seriously surpass silicate product with the technical requirements of flyash, therefore carry out volume control in the underproof situation of starting material, cause the difficulty of its comprehensive utilization very large.Utilizing aspect the solid sulphur ash of high calcium at present, mainly concentrate on aspects such as producing aluminosulfate cement, cement mixture, molecular sieve, soil improvement agent, autoclaved brick, also be useful on the report in the gas concrete, but the f-CaO content of its used solid sulphur ash is at 1%～3.6%, SO
3
Content is 3%～7%, and the easy craze and transfiguration of goods, its ultimate compression strength and the rear intensity of freezing are all lower, do not reach the requirement of the standard GB/T 11968-2006 " autoclave aerated concrete building block " of China, so the method for the solid sulphur ash of existing employing high calcium making air-entrained concrete building block or not ideal enough also is not widely used at present.
Summary of the invention
The object of the invention is: provide a kind of and be difficult for craze and transfiguration, ultimate compression strength and freeze all making methods of higher high calcium sulfur fixation ash aerated concrete building block of rear intensity, to overcome the deficiencies in the prior art.
The present invention is achieved in that the making method of a kind of high calcium sulfur fixation ash aerated concrete of the present invention building block is, calculate by weight and get: 40～70 parts of the solid sulphur ashes of high calcium, 20～40 parts in flyash, 5～12 parts of cement, 0.1～15 part of siliceous material, 10～20 parts in lime, 0.1～2 part in gypsum, 0.06～0.1 part of aluminium powder is raw material, first with the solid sulphur ash of high calcium, flyash, siliceous material, gypsum is put into stirrer and is added entry and stirs with it, it adds water weight is 0.3～0.5 times of solid material gross weight, after stirring, get slip, and then with aluminium powder, get casting slurry after stirring together in lime and the cement adding slip, casting slurry poured into a mould in the progressive die tool leave standstill precuring, the time of leaving standstill precuring is 1.5～2 hours, the temperature that leaves standstill precuring should be controlled at 23 ℃～40 ℃ scope, leave standstill and get the molding mass piece after precuring is finished, the molding mass piece is cut into the building block of desired size and shape, autoclave is put in this building block carried out steam press maintenance 7～13 hours, when carrying out steam press maintenance, vapor pressure in the autoclave should remain on 1～1.2MPa, goes out still and namely obtain high calcium sulfur fixation ash aerated concrete building block finished product after steam press maintenance is finished.
The sulfur trioxide content of the solid sulphur ash of above-mentioned high calcium is 4.5%～15%, and its free calcium oxide content is 1.8%～10%.
Above-mentioned siliceous material is levigate silica sand or SILICA FUME.
Above-mentioned cement is the ordinary Portland cement of label 42.5.
Above-mentioned gypsum is phosphogypsum or the desulfurated plaster in the plaster of paris or the industrial by-products.
Above-mentioned lime is fine grinding quicklime, and the degree sum of the CaO in this fine grinding quicklime and MgO is CaO+MgO 〉=75%.
Before solid sulphur ash, flyash, siliceous material and gypsum are put into stirrer and stirred with high calcium, first the solid sulphur ash of high calcium, flyash, siliceous material and gypsum are put into ball mill together and carry out mixing and ball milling processing 5～20 minutes.
Owing to adopted technique scheme, the present invention is according to the characteristics of the solid sulphur ash of high calcium, existing production technique for the ordinary fly ash steam-pressing aero-concrete is improved, make it not to be only applicable to the making of high calcium sulfur fixation ash aerated concrete building block, and its quality product can reach the GB requirement.The present invention utilizes the solid sulphur ash of high calcium, siliceous material, lime and cement etc. are raw material, add whipping agent and activator, the raw materials such as inorganic compounding mineral, the scientific formula that obtains by a large amount of tests carries out modification to material, has not only increased the hardness of goods, has reduced water-intake rate, and the light heat-insulation and heat-preservation material building block of producing, can satisfy heat preservation energy-saving, have again certain intensity, have following numerous good characteristic: low heat conduction, low heat transfer coefficient, light body, high strength, fire prevention, acidproof, alkali, sound insulation, environmental protection, easy construction uses proof through reality, product of the present invention just incorporates good heat insulation effect in the body of wall in masonry panel, meets the requirement that country's building is advocated energy-saving heat preserving fully.In addition, the present invention be advantageous in that: by physical method the solid sulphur ash of high calcium is processed, strengthened the activity of the solid sulphur ash of high calcium, make the product of producing meet the technical requirements of GB11968-2006 " autoclave aerated concrete building block " fully.The present invention provides a kind of more easily approach for the recycle of the solid sulphur ash of high calcium.So, the present invention compared with prior art, the present invention not only has the product of producing and is difficult for craze and transfiguration, ultimate compression strength and freezes high advantages of rear intensity, and the present invention also have technical process simple, utilize the amount of the solid sulphur ash of high calcium large, the advantages such as cost of manufacture is lower, easy construction.
Embodiment
The present invention is further illustrated below in conjunction with embodiment.
Embodiments of the invention 1: calculate by weight, 0.06 part of 1 part in 15 parts in 5 parts of siliceous materials, lime, gypsum, aluminium powder getting 50 parts of the solid sulphur ashes of high calcium, 20 parts in flyash, label and be 42.5 9 parts of ordinary Portland cements, levigate silica sand or SILICA FUME are raw material, the sulfur trioxide content of the solid sulphur ash of its high calcium should be controlled at 4.5%～15% scope, and its free calcium oxide content should be controlled at 1.8%～10% scope; Gypsum can adopt phosphogypsum or the desulfurated plaster in the plaster of paris or the industrial by-products; Lime should be fine grinding quicklime, and the degree sum of the CaO in this fine grinding quicklime and MgO is controlled at the scope of CaO+MgO 〉=75%; Then first with the solid sulphur ash of high calcium, flyash, siliceous material and gypsum are put into together ball mill and are carried out the mixing and ball milling processing after 5～20 minutes, again with the solid sulphur ash of high calcium, flyash, siliceous material, gypsum is put into stirrer and is added entry and stirs with it, it adds water weight is 0.3～0.5 times of solid material gross weight, after stirring, get slip, then add aluminium powder, unslaked lime, casting slurry after cement stirs in the slip, casting slurry poured into a mould in the progressive die tool leave standstill precuring, the time of leaving standstill precuring is 1.5～2 hours, the temperature that leaves standstill precuring should be controlled at 23 ℃～40 ℃ scope, leave standstill and get the molding mass piece after precuring is finished, the molding mass piece is cut into the building block of desired size and shape, autoclave is put in this building block carried out steam press maintenance 7～13 hours, when carrying out steam press maintenance, vapor pressure in the autoclave should remain on 1～1.2MPa, goes out still and namely obtain high calcium sulfur fixation ash aerated concrete building block finished product after steam press maintenance is finished.
Embodiments of the invention 2: calculate by weight, 0.06 part of 1 part in 16 parts in 10 parts of siliceous materials, lime, gypsum, aluminium powder getting 70 parts of the solid sulphur ashes of high calcium, 30 parts in flyash, label and be 42.5 10 parts of ordinary Portland cements, levigate silica sand or SILICA FUME are raw material, the sulfur trioxide content of the solid sulphur ash of its high calcium should be controlled at 4.5%～15% scope, and its free calcium oxide content should be controlled at 1.8%～10% scope; Gypsum can adopt phosphogypsum or the desulfurated plaster in the plaster of paris or the industrial by-products; Lime should be fine grinding quicklime, and the degree sum of the CaO in this fine grinding quicklime and MgO is controlled at the scope of CaO+MgO 〉=75%; Then with the solid sulphur ash of high calcium, flyash, siliceous material, gypsum is put into stirrer and is added entry and stirs with it, it adds water weight is 0.3～0.5 times of solid material gross weight, after stirring, get slip, then add aluminium powder, unslaked lime, get casting slurry in the cement feed slurry, casting slurry poured into a mould in the progressive die tool leave standstill precuring, the time of leaving standstill precuring is 1.5～2 hours, the temperature that leaves standstill precuring should be controlled at 23 ℃～40 ℃ scope, leave standstill and get the molding mass piece after precuring is finished, the molding mass piece is cut into the building block of desired size and shape, autoclave is put in this building block carried out steam press maintenance 7～13 hours, when carrying out steam press maintenance, vapor pressure in the autoclave should remain on 1～1.2MPa, goes out still and namely obtain high calcium sulfur fixation ash aerated concrete building block finished product after steam press maintenance is finished.
According to the end properties of above-mentioned two embodiment mades, its test detects data shown in following " high calcium sulfur fixation ash aerated concrete block performance table ":
As can be seen from the above table, product performance of the present invention meet the correlation technique requirement of GB11968-2006 " autoclave aerated concrete building block " fully.The present invention is energy-saving and emission-reduction both, have solved again the key technical problem in producing, for the comprehensive utilization of fluid-bed boiler fly ash provides reliable technical guarantee and practical experience.
Claims (7)
1. the making method of high calcium sulfur fixation ash aerated concrete building block, it is characterized in that: calculate by weight and get: 40～70 parts of the solid sulphur ashes of high calcium, 20～40 parts in flyash, 5～12 parts of cement, 0.1～15 part of siliceous material, 10～20 parts in lime, 0.1～2 part in gypsum, 0.06～0.1 part of aluminium powder is raw material, first with the solid sulphur ash of high calcium, flyash, siliceous material, gypsum is put into stirrer and is added entry and stirs with it, it adds water weight is 0.3～0.5 times of solid material gross weight, after stirring, get slip, and then with aluminium powder, get casting slurry after stirring together in lime and the cement adding slip, casting slurry poured into a mould in the progressive die tool leave standstill precuring, the time of leaving standstill precuring is 1.5～2 hours, the temperature that leaves standstill precuring should be controlled at 23 ℃～40 ℃ scope, leave standstill and get the molding mass piece after precuring is finished, the molding mass piece is cut into the building block of desired size and shape, autoclave is put in this building block carried out steam press maintenance 7～13 hours, when carrying out steam press maintenance, vapor pressure in the autoclave should remain on 1～1.2MPa, goes out still and namely obtain high calcium sulfur fixation ash aerated concrete building block finished product after steam press maintenance is finished.
2. the making method of high calcium sulfur fixation ash aerated concrete according to claim 1 building block is characterized in that: the sulfur trioxide content of the solid sulphur ash of high calcium is 4.5%～15%, and its free calcium oxide content is 1.8%～10%.
3. the making method of high calcium sulfur fixation ash aerated concrete according to claim 1 building block, it is characterized in that: siliceous material is levigate silica sand or SILICA FUME.
4. the making method of high calcium sulfur fixation ash aerated concrete according to claim 1 building block, it is characterized in that: cement is the ordinary Portland cement of label 42.5.
5. the making method of high calcium sulfur fixation ash aerated concrete according to claim 1 building block, it is characterized in that: gypsum is phosphogypsum or the desulfurated plaster in the plaster of paris or the industrial by-products.
6. the making method of high calcium sulfur fixation ash aerated concrete according to claim 1 building block, it is characterized in that: lime is fine grinding quicklime, and the degree sum of the CaO in the fine grinding quicklime and MgO is CaO+MgO 〉=75%.
7. the making method of high calcium sulfur fixation ash aerated concrete according to claim 1 building block, it is characterized in that: before solid sulphur ash, flyash, siliceous material and gypsum are put into stirrer and stirred with high calcium, first the solid sulphur ash of high calcium, flyash, siliceous material and gypsum are put into ball mill together and carry out mixing and ball milling processing 5～20 minutes.
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Cited By (10)
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| CN104556935A (en) * | 2014-12-19 | 2015-04-29 | 安徽中龙建材科技有限公司 | Waterproof aerated concrete block and preparation method thereof |
| CN104556896A (en) * | 2014-12-19 | 2015-04-29 | 安徽中龙建材科技有限公司 | High-strength aerocrete building block and preparation method thereof |
| CN105693178A (en) * | 2015-04-03 | 2016-06-22 | 湖北益通建设股份有限公司 | Method for preparing A3.5B05-grade autoclaved aerated concrete block by quartz weathered sand and application thereof to wall |
| CN109467344A (en) * | 2018-12-29 | 2019-03-15 | 广东东实开能能源有限公司 | The method that calcium carbide industry solid waste prepares Aerated concrete products |
| CN109665816A (en) * | 2019-02-20 | 2019-04-23 | 梅州市梅县区金蔡建材厂 | A kind of sintering heat-reserving brick and preparation method thereof |
| CN112897970A (en) * | 2020-12-27 | 2021-06-04 | 贵州师范大学 | Inorganic fireproof heat-insulation board using industrial waste residues and production method thereof |
| CN113024216A (en) * | 2021-03-29 | 2021-06-25 | 广西建筑材料科学研究设计院有限公司 | Method for preparing assembled heat-insulating wallboard from sulfur fixation ash |
| CN113461435A (en) * | 2021-01-12 | 2021-10-01 | 山西鼎正环保建材有限公司 | Method for preparing autoclaved building blocks by comprehensively utilizing circulating fluidized bed sulfur-fixing ash |
| CN113800841A (en) * | 2021-09-16 | 2021-12-17 | 四川杭加坤正新型材料有限公司 | Lime-free aerated concrete product and production method thereof |
| CN114735983A (en) * | 2022-05-09 | 2022-07-12 | 同济大学 | High-strength fly ash brick containing fluidized bed sulfur fixation ash and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104556935A (en) * | 2014-12-19 | 2015-04-29 | 安徽中龙建材科技有限公司 | Waterproof aerated concrete block and preparation method thereof |
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| CN105693178A (en) * | 2015-04-03 | 2016-06-22 | 湖北益通建设股份有限公司 | Method for preparing A3.5B05-grade autoclaved aerated concrete block by quartz weathered sand and application thereof to wall |
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| CN113461435A (en) * | 2021-01-12 | 2021-10-01 | 山西鼎正环保建材有限公司 | Method for preparing autoclaved building blocks by comprehensively utilizing circulating fluidized bed sulfur-fixing ash |
| CN113024216A (en) * | 2021-03-29 | 2021-06-25 | 广西建筑材料科学研究设计院有限公司 | Method for preparing assembled heat-insulating wallboard from sulfur fixation ash |
| CN113800841A (en) * | 2021-09-16 | 2021-12-17 | 四川杭加坤正新型材料有限公司 | Lime-free aerated concrete product and production method thereof |
| CN114735983A (en) * | 2022-05-09 | 2022-07-12 | 同济大学 | High-strength fly ash brick containing fluidized bed sulfur fixation ash and preparation method thereof |
| CN114735983B (en) * | 2022-05-09 | 2023-02-17 | 同济大学 | Coal ash brick containing fluidized bed sulfur fixation ash and preparation method thereof |
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Application publication date: 20130102 |