CN102757211B - Aerated concrete block produced by specially-made mineral waste residue and tailings steel slag and production method of aerated concrete block - Google Patents
Aerated concrete block produced by specially-made mineral waste residue and tailings steel slag and production method of aerated concrete block Download PDFInfo
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Abstract
The invention provides an aerated concrete block produced through using specially-made mineral waste residue and tailings steel slag and a production method of the aerated concrete block. The aerated concrete block is produced through the following steps: adding an additive A, an additive B and water in components as follows: 40 to 50% of specially-made mineral waste residue obtained in a such way that cinder is obtained through the production process of recycling steel slag discharged from Taizhou Zhenchang Industrial Waste Residue Comprehensive Utilization LTD and metallurgical and chemicalferrous waste residue, and then is water-quenched, 35 to 45% of tailings steel slag, 2 to 4% of cement clinker, 1 to 3% of gypsum, and 8 to 12% of modified wood, wherein the grain size of the specially-made mineral waste residue is less than or equal to 5 mm, the grain size of the tailings steel slag is less than or equal to 20 mm, the additive A accounts for 1% of the total weight of the components, the additive B accounts for 0.05% of the total weight of the components, and water accounts for 0.5 to 0.6 times of the total weight of the components; and conducting mixing, heating, air-entrapping, steaming and pressing, and curing in sequence. The aerated concrete block produced by adopting the production method is high in strength, and small in drying shrinkage value, and can meet the block standards of the A3.5 grade and the B09 grade in the JC1062-2007 foam concrete block standard.
Description
Technical field
The present invention relates to industrial solid castoff comprehensive utilization, specifically is a kind of utilize Taizhou to shake method that the special slag of prosperous company and tailing slag produce a kind of aerated-block of building by laying bricks or stones for skeleton construction non-bearing external and internal wall.
Background technology
Slag is large class industrial residue of steel-making converter or electric furnace discharging, quantity discharged is about 15% of output of steel, general steel scrap and the 15% above iron oxide composition that also contains about 10%, be rich in the basic oxide chemical combination mineral clinker of abundant Ca, Mg matter composition again, and major part is the solid fusing compound state of cinder ladle iron, iron cinder inclusion, not only difficult broken but also difficult mill will reach cracking and sorting and the back recycling of purifying, and not only takes a lot of work but also require great effort.Therefore, most of low-grade iron content slag does not have effective recycling, the recyclable plain serious waste of resources of iron of utilizing.Along with China's heavy chemical industry fast development, the quantity discharged of metallurgy such as sulfate slag, gas mud, dedusting ash, chemical industry iron slag is the gesture of quick growth, and low-grade iron slag regeneration iron processed and residue resource disposal regeneration techniques thereof are the resource technologies of demanding urgently breaking through in the heavy chemical industry Sustainable developments such as metallurgy, chemical industry.
Taizhou prosperous industrial residue comprehensive utilization limited liability company of shaking invents out a kind of with low-grade iron slag and metallurgy through years of researches, chemical industry dirt mud uses simultaneously and carries out comprehensive utilization method, and applied for patent of invention on April 10th, 2009 in China Intellectual Property Office, its patent No.: ZL200910049152.X, denomination of invention is: a kind of recycle slag and metallurgy, the blast furnace ironmaking production technique of chemical industry iron slag, this patent is in Granted publication on September 8th, 2010, its Granted publication number is: CN101532068B, this patent disclosure a kind of low-grade slag and metallurgy, the comprehensive utilization new technology of chemical industry iron slag, this technology can produce a kind of new slag (Taizhou shake prosperous company slag), its chemical ingredients and ordinary blast slag, the chemical ingredients contrast of tailing slag is concrete as table 1, and the blast-furnace slag that relates in the table 1 is compared with the tailing slag with the blast-furnace slag of each big steel enterprise of present China with tailing slag chemical ingredients, chemical ingredients is close, and is representative.
Table 1 Taizhou shake prosperous slag and blast-furnace slag, tailing slag chemical ingredients contrast (%)
As can be seen from the above table, Taizhou slag that prosperous industrial residue comprehensive utilization limited liability company produces that shakes is compared with ordinary slag, and its basicity factor belongs to acid slag less than 1, so the alkaline slag of specific activity routine is low; Its vitreum polymerization degree increases in addition, is difficult for disintegrating, and has also influenced the activity of this slag.Find after deliberation, then can not be used as the starting material of producing qualified autoclaved lightweight concrete as not remedying above-mentioned deficiency, so so far not the someone adopt Taizhou prosperous slag direct production aerated-block that shakes.
Slag is the topmost industrial residue of iron and steel enterprise, chemical ingredients and mineral composition are relatively stable but slow owing to aquation, early strength is low, poor stability, grindability difference and the more high reason of all iron content are difficult to utilize, and contaminate environment, cause the waste of resource, this also becomes the important factor of restriction iron and steel enterprise sustainable development.
Summary of the invention
The objective of the invention is Taizhou special slag and compound use of tailing slag that prosperous company produces of shaking added the method for an amount of cement clinker and gypsum production autoclave aerated concrete building block.The present invention has taken full advantage of the special slag that obtains by after slag and the iron slag recycling, industrial residue successfully is applied to the building materials production industry, thereby has solved problems such as the wasting of resources and environmental pollution to a certain extent.
Described a kind of air-entrained concrete building block that utilizes special slag and tailing slag to produce is characterized in that the feed composition of described air-entrained concrete building block and weight percent thereof are:
In above material, add the water of 0.5～0.6 times of the admixture B of the admixture A of its gross weight 1%, above material gross weight 0.05% and above material gross weight;
Described special slag is to be the slag that the technology of the disclosed a kind of recycle slag of patent of invention of ZL200910049152.X and metallurgy, chemical industry iron slag obtains by shake the patent No. that prosperous industrial residue fully utilizes limited liability company of Taizhou, after passing through the shrend granulation again, obtaining water ratio is 10%～15%, the slag of particle diameter≤5mm;
Described tailing slag is that the steel mill steel-making slag of discharging is after fragmentation, screening, magnetic separation, particle diameter≤the 20mm that selects, water ratio is 10%～15%, composition requires: TFe (full iron)≤16%, MFe (Armco magnetic iron)≤2%, f-CaO (free calcium oxide)≤4%, the tailing slag of f-MgO (free magnesium)≤0.2%;
Described cement clinker adopts the general cement clinker that meets the GB/T21372-2008 standard-required;
Described gypsum is two water desulfurated plasters, and technical requirements meets the requirement of GB/T5483-2008 " plaster of paris " G class secondary standard.
Described modifier is by multiple the mixing in quartz sand, bauxitic clay, silicon powder, flyash, clay, volcanic ash, zeolite, the coal-fired slag; These materials are all selected general purpose material in the steel-making iron industry for use, and any blending ratio can.
Described admixture A is mixed by one or both and trolamine in sodium lignosulfonate, sodium hydroxide, the sodium sulfate, in the ethylene glycol one or both, the former accounts for 70～90% of compound additive gross weight, 10～30% of latter's compound additive gross weight to mix the back; Described admixture B is the aluminium powder of getting angry of purity 〉=98%.
A kind of method of utilizing above-mentioned material production autoclaved aerated building block is characterized in that may further comprise the steps:
(1) adopting the shake patent No. of prosperous industrial residue comprehensive utilization limited liability company of Taizhou is the slag that the technology of the disclosed a kind of recycle slag of patent of invention of ZL200910049152.X and metallurgy, chemical industry iron slag obtains, obtain particle diameter≤5mm through after the conventional shrend granulation again, water ratio is 10%～15% special slag;
(2) will make steel the slag of discharging through conventional fragmentation, screening and magnetic separation process after, selecting water ratio is 10%～15%, composition requires: TFe (full iron)≤16%, MFe (Armco magnetic iron)≤2%, f-CaO (free calcium oxide)≤4%, f-MgO (free magnesium)≤0.2%, the remaining tailings of particle diameter≤20mm is as the tailing slag;
(3) convert according to the raw material weight per-cent of above-mentioned air-entrained concrete building block and take by weighing special slag that step (1) obtains, tailing slag that step (2) obtains and general cement clinker, gypsum, modifier, and with its mixing;
(4) material that mixes in the step (3) is mixed the admixture A of its mixture gross weight 1% outward after, add the water mix grinding, wherein add water weight and be 0.5～0.6 times of mixture gross weight in the step (3), mix grinding reaches the 0.08mm square hole sieve and tails over≤10% regulation fineness after, it is carried out routine heats;
(5) to be heated reaching got angry temperature 50-55 ℃ the time, mix mixture gross weight 0.05% admixture B in the step (3), enter stirrer and mix to evenly, then pour the mixed slurry that stirs into the 25～35min that gets angry in the autoclaved lightweight concrete mould rapidly;
(6) get angry finish after, precuring is 2～4 hours under 60～70 ℃ of temperature, treats that the specification that base substrate (refer to that test block just becomes solid by settable liquid, and possess certain intensity, but the state during without maintenance) intensity reaches behind 0.7～1.0MPa as required cuts;
(7) after cutting is finished, the autoclaved lightweight concrete mould is removed, and the base substrate that cuts forms building block, and the building block that cuts is delivered in the autoclave to press temperature be steam-cured 3-5h under 70～80 ℃ the condition according to steaming, and then be forced into 0.8～1.0MPa, carry out 5～8 hours steam press maintenances again;
(8) after steam press maintenance finished, building block ageing under natural condition (being the state of natural temperature and humidity) got final product in 3～7 days.
Described admixture A is mixed by one or both and trolamine in sodium lignosulfonate, sodium hydroxide, the sodium sulfate, in the ethylene glycol one or both, the former accounts for 70～90% of compound additive gross weight, 10～30% of latter's compound additive gross weight to mix the back; Described admixture B is the aluminium powder of getting angry of purity 〉=98%.
The high basicity that the present invention takes full advantage of the tailing slag excites by the shake activity of the special slag that prosperous company obtains after with slag and iron slag comprehensive treating process of Taizhou, remedied the shake deficiency of the special slag of prosperous company of Taizhou.Yet, factors leading to social instability such as free calcium oxide and free magnesium have also been introduced in the adding of tailing slag, because free calcium oxide, clearing up of free magnesium can cause the building block volumetric expansion, cause structure deteriorate, block strength is descended, have a strong impact on goods stability, the present invention comes it is carried out modification by the modifier that introducing contains the sial phase, free calcium oxide, silica-aluminum materials in free magnesium and the modifier forms silicate, aluminate, suppressed free calcium oxide, clearing up of free magnesium, thus free calcium oxide can significantly be eliminated, objectionable constituent such as free magnesium are to the disadvantageous effect of autoclaved aerated building block.Improved the final strength of goods, and the drying shrinkage value of goods is significantly reduced.And the adding of compound additive can significantly improve the grindability of material, increases the autoclaved aerated building block early strength.Simultaneously at the slag characteristic of different steel mills, adopt targetedly steaming pressuring curing system to reach better effect.
Its intensity height of air-entrained concrete building block, the drying shrinkage value that adopt the present invention to produce are little, can reach A1.5～A5.0 in the JC1062-2007 foam concrete block standard, the requirement of B08～B10 grade.
Embodiment
The invention will be further described below in conjunction with specifically having implemented.Special slag in following examples all is to adopt the shake slag that obtains for the technology of the disclosed a kind of recycle slag of ZL200910049152.X and metallurgy, chemical industry iron slag in Chinese patents number of prosperous industrial residue comprehensive utilization limited liability company of Taizhou, through obtaining particle diameter≤5mm after the conventional shrend, its water ratio is 10%～15% slag again;
Embodiment 1: a kind of air-entrained concrete building block that utilizes special slag and tailing slag to produce is characterized in that the feed composition of described air-entrained concrete building block and weight percent thereof are:
In above material, add the water of get angry 0.5 times of aluminium powder and above material gross weight of admixture A, above material gross weight 0.05% purity 〉=98% of its gross weight 1%; Wherein admixture A is that weight ratio mixing in 3: 3: 4 is formed by wooden sodium sulfonate, ethylene glycol, sodium hydroxide by weight;
Wherein: described tailing slag is after being handled through conventional fragmentation, screening and magnetic separation operation by the stewing slag of the heat of Xinyu, Jiangxi Iron And Steel Company, select particle diameter≤20mm, water ratio is 10%～15%, composition requires: TFe≤16%, MFe≤2%, f-CaO≤4%, the tailing slag of f-MgO≤0.2%;
Described modifier by clay, flyash, silicon powder, zeolite by 1: 1: 1: 1 weight ratio is mixed and to be formed;
Adopt the material described in the embodiment 1 and proportioning thereof to produce the method for air-entrained concrete building block, it is characterized in that concrete steps are as follows:
(1) adopting the shake patent No. of prosperous industrial residue comprehensive utilization limited liability company of Taizhou is the slag that the disclosed a kind of recycle slag of patent of invention of ZL200910049152.X and metallurgy, chemical industry iron slag technology obtain, obtain particle diameter≤5mm through after the conventional shrend granulation again, water ratio is 10%～15% special slag;
(2) by after fragmentation, screening and the processing of magnetic separation operation of the stewing slag of the heat of Xinyu, Jiangxi Iron And Steel Company through routine, select particle diameter≤20mm, water ratio is 10%～15%, composition requires: TFe≤16%, MFe≤2%, f-CaO≤4%, the tailing slag of f-MgO≤0.2%;
(3) according to the weight percent of the raw material of air-entrained concrete building block among the embodiment 1 convert take by weighing the special slag that step (1) obtains, the tailing slag that step (2) obtains, general cement clinker, gypsum and by clay, flyash, silicon powder, zeolite by 1: 1: 1: 1 weight ratio is mixed the modifier of forming, and with its mixing;
What (4) the mixed material of step (3) is mixed its mixture gross weight 1% outward is that 3: 3: 4 weight ratios are mixed the admixture A that forms by wooden sodium sulfonate, ethylene glycol, sodium hydroxide according to weight ratio, add the water mix grinding, wherein amount of water is 0.5 times of mixture gross weight in the step (3), it is after 10% the regulation fineness, it to be heated that mix grinding reaches that the 0.08mm square hole sieve tails over;
(5) to be heated reaching when getting angry 50 ℃ of temperature, mix the aluminium powder of getting angry of mixture gross weight 0.05% purity in the step (3) 〉=98%, enter conventional stirrer and mix to evenly, then pour the mixed slurry that stirs into the 25min that gets angry in the air-entrained concrete building block mould rapidly;
(6) get angry finish after, precuring is 4 hours under 60 ℃ of temperature, treats that the specification that blank strength reaches behind the 0.7MPa as required cuts;
(7) after cutting is finished, the autoclaved lightweight concrete mould is removed, the base substrate that cuts forms building block, and the building block that cuts is delivered in the autoclave to press temperature be steam-cured 3h under 75 ℃ the condition according to steaming, and then is forced into 1.0MPa, carries out 5 hours steam press maintenances again;
(8) after steam press maintenance finished, building block went out still ageing under natural condition (for the state of natural temperature and humidity) and got final product in 5 days.
The every performance index of air-entrained concrete building block such as the table 2 that obtain according to above-described embodiment:
Table 2 test block performance index
By table 2 as can be seen, the every performance index according to the air-entrained concrete building block of above-described embodiment production all can reach A5.0 in the JC1062-2007 foam concrete block standard, the building block standard of B09 grade.
Embodiment 2:
A kind of air-entrained concrete building block that utilizes special slag and tailing slag to produce is characterized in that the feed composition of described air-entrained concrete building block and weight percent thereof are:
In above material, add the water of get angry 0.55 times of aluminium powder and above material gross weight of purity 〉=98% of the admixture A of its gross weight 1%, above material gross weight 0.05%; Wherein admixture A forms by being mixed by 1: 5: 4 weight ratio by trolamine, wooden sodium sulfonate, sodium hydroxide;
The stewing slag of the heat that described tailing slag is Xiangtan Iron ﹠ Steel Co. Hunan Prov. is selected particle diameter≤20mm after the fragmentation of routine, screening, magnetic separation operation, water ratio is 10%～15%, composition requires: TFe≤16%, MFe≤2%, f-CaO≤4%, the tailing slag of f-MgO≤0.2%;
Described modifier is mixed to form according to 1: 2 weight ratio by quartz sand, volcanic ash and is formed.
Adopt the material described in the embodiment 2 and proportioning thereof to produce the method for air-entrained concrete building block, it is characterized in that concrete steps are as follows:
(1) adopting the shake patent No. of prosperous industrial residue comprehensive utilization limited liability company of Taizhou is the slag that the disclosed a kind of recycle slag of patent of invention of ZL200910049152.X and metallurgy, chemical industry iron slag technology obtain, obtain particle diameter≤5mm through after the conventional shrend granulation again, water ratio is 10%～15% special slag;
(2) with after fragmentation, screening and the magnetic separation process processing of the stewing slag of the heat of Xiangtan Iron ﹠ Steel Co. Hunan Prov. through routine, select particle diameter≤20mm, water ratio is 10%～15%, composition requires: TFe≤16%, MFe≤2%, f-CaO≤4%, the tailing slag of f-MgO≤0.2%;
(3) convert according to the feed composition weight percent of the air-entrained concrete building block described in the embodiment 2 and take by weighing the special slag that step (1) obtains, the tailing slag that step (2) obtains, general cement clinker, gypsum and mix the modifier of forming by quartz sand, volcanic ash according to 1: 2 weight ratio, and with its mixing;
(4) the mixed material of step (3) is mixed outward mixture gross weight 1% by trolamine, wooden sodium sulfonate, sodium hydroxide mix the admixture A that forms by 1: 5: 4 weight ratio, add the water mix grinding, wherein add water weight and be 0.55 times of mixture gross weight in the step (3), it is after 8% the regulation fineness, it to be heated that mix grinding reaches that the 0.08mm square hole sieve tails over;
(5) to be heated reaching when getting angry 52 ℃ of temperature, mix the aluminium powder of getting angry of mixture gross weight 0.05% purity in the step (3) 〉=98%, enter stirrer and mix to evenly, then pour the mixed slurry that stirs into the 28min that gets angry in the air-entrained concrete building block mould rapidly;
(6) get angry finish after, precuring is 3.5 hours under 63 ℃ of temperature, treats that the specification that blank strength reaches behind the 0.8MPa as required cuts;
(7) after cutting is finished, the autoclaved lightweight concrete mould is removed, the base substrate that cuts forms building block, and the building block that cuts is delivered in the autoclave to press temperature be steam-cured 3h under 80 ℃ the condition according to steaming, and then is forced into 1.0MPa, carries out 4 hours steam press maintenances again;
(8) after steam press maintenance finished, building block ageing under natural condition (being the state of natural temperature and humidity) got final product in 4 days.
The every performance index of air-entrained concrete building block such as the table 3 that obtain according to above-described embodiment:
Table 3 test block performance index
As can be seen from Table 3, the autoclaved aerated building block of producing according to above-described embodiment can reach A3.5 in the JC1062-2007 foam concrete block standard, the building block standard of B09 grade.
Embodiment 3:
A kind of air-entrained concrete building block that utilizes special slag and tailing slag to produce is characterized in that the feed composition of described air-entrained concrete building block and weight percent thereof are:
In above material, add the water of get angry 0.6 times of aluminium powder and above material gross weight of purity 〉=98% of the admixture A of its gross weight 1%, above material gross weight 0.05%; Wherein admixture A forms by being mixed by 3: 2: 5 weight ratios by wooden sodium sulfonate, ethylene glycol, sodium sulfate;
Described tailing slag is that the heat of Lianyuan, Hunan Iron And Steel Company is boiled in a covered pot over a slow fire slag after operations such as conventional fragmentation, screening, magnetic separation are handled, and selects particle diameter≤20mm, and water ratio is 10%～15%, composition requires: TFe≤16%, MFe≤2%, f-CaO≤4%, the tailing slag of f-MgO≤0.2%;
Described modifier is mixed according to 2: 1: 3 weight ratios by clay, volcanic ash, bauxitic clay and is formed.
Adopt the material described in the embodiment 2 and proportioning thereof to produce the method for air-entrained concrete building block, it is characterized in that concrete steps are as follows:
(1) adopting the shake patent No. of prosperous industrial residue comprehensive utilization limited liability company of Taizhou is the slag that the disclosed a kind of recycle slag of patent of invention of ZL200910049152.X and metallurgy, chemical industry iron slag technology obtain, obtain particle diameter≤5mm through after the conventional shrend granulation again, water ratio is 10%～15% special slag;
(2) with after the fragmentation of the stewing slag process of the heat of Lianyuan, Hunan Iron And Steel Company, screening and the magnetic separation process processing, select particle diameter≤20mm, water ratio is 10%～15%, composition requires: TFe≤16%, MFe≤2%, f-CaO≤4%, f-MgO≤0.2%, the tailing slag;
(3) convert according to the feed composition weight percent of air-entrained concrete building block among the embodiment 3 and take by weighing the special slag that step (1) obtains, the tailing slag that step (2) obtains, general cement clinker, gypsum and mix the modifier of forming by clay, volcanic ash, bauxitic clay according to 2: 1: 3 weight ratios, and with its mixing;
(4) the mixed material of step (3) is mixed outward mixture gross weight 1% by wooden sodium sulfonate, ethylene glycol, sodium sulfate by mixing the compound additive of forming at 3: 2: 5, add the water mix grinding, wherein add water weight and be 0.6 times of mixture gross weight in the step (3), it is after 6% the regulation fineness, it to be heated that mix grinding reaches that the 0.08mm square hole sieve tails over;
(5) to be heated reaching when getting angry 53 ℃ of temperature, mix the aluminium powder of getting angry of mixture gross weight 0.05% purity in the step (3) 〉=98%, enter stirrer and mix to evenly, then pour the mixed slurry that stirs into the 30min that gets angry in the air-entrained concrete building block mould rapidly;
(6) get angry finish after, precuring is 4 hours under 65 ℃ of temperature, treats that the specification that blank strength reaches behind the 0.9MPa as required cuts;
(7) after cutting is finished, the autoclaved lightweight concrete mould is removed, the base substrate that cuts forms building block, and the building block that cuts is delivered in the autoclave to press temperature be steam-cured 4h under 80 ℃ the condition according to steaming, and then is forced into 0.9MPa, carries out 4 hours steam press maintenances again;
(8) after steam press maintenance finished, building block ageing under natural condition (being the state of natural temperature and humidity) got final product in 3 days.
The every performance index of air-entrained concrete building block such as the table 4 that obtain according to above-described embodiment:
Table 4 test block performance index
The autoclaved aerated building block of producing according to above-described embodiment as can be seen by table 4 can reach A2.5 in the JC1062-2007 foam concrete block standard, the building block standard of B10 grade.
Embodiment 4:
A kind of air-entrained concrete building block that utilizes slag and slag to produce is characterized in that the feed composition of described air-entrained concrete building block and weight percent thereof are:
In above material, add the water of get angry 0.58 times of aluminium powder and above material gross weight of purity 〉=98% of the admixture A of its gross weight 1%, above material gross weight 0.05%; Wherein admixture A is made up of by 1: 2: 7 weight ratio mixing trolamine, ethylene glycol, sodium sulfate;
Described tailing slag is the hot application slag of XiLin, Heilungkiang Iron And Steel Company after operations such as the fragmentation of routine, screening, magnetic separation are handled, and selects particle diameter≤20mm, and water ratio is 10%～15%, composition requires: TFe≤16%, MFe≤2%, f-CaO≤4%, the tailing of f-MgO≤0.2%;
Described modifier by quartz sand, flyash, silicon powder, coal furnace according to 2: 1: 3: 1 weight ratio is mixed and is formed.
Adopt the material described in the embodiment 4 and proportioning thereof to produce the method for air-entrained concrete building block, it is characterized in that concrete steps are as follows:
(1) adopting the shake patent No. of prosperous industrial residue comprehensive utilization limited liability company of Taizhou is the slag that the disclosed a kind of recycle slag of patent of invention of ZL200910049152.X and metallurgy, chemical industry iron slag technology obtain, obtain particle diameter≤5mm through after the conventional shrend granulation again, water ratio is 10%～15% special slag;
(2) after the conventional fragmentation of hot application slag process, screening and the magnetic separation process processing with XiLin, Heilungkiang Iron And Steel Company, select particle diameter≤20mm, water ratio is 10%～15%, composition requires: TFe≤16%, MFe≤2%, f-CaO≤4%, f-MgO≤0.2%, the tailing slag;
(3) according to the feed composition weight percent of air-entrained concrete building block among the embodiment 3 convert take by weighing the special slag that step (1) obtains, the tailing slag that step (2) obtains, general cement clinker, gypsum and by quartz sand, flyash, silicon powder, coal furnace according to 2: 1: 3: 1 weight ratio is mixed the modifier of forming, and with its mixing;
(4) the mixed material material of step (3) is mixed the compound additive that mixture gross weight 1% is made up of by mixing in 1: 2: 7 trolamine, ethylene glycol, sodium sulfate outward, add the water mix grinding, wherein the weight of water is 0.58 times of mixture gross weight in the step (3), mix grinding reaches the 0.08mm square hole sieve and tails over≤7% regulation fineness after, it is heated;
(5) to be heated reaching when getting angry 55 ℃ of temperature mixed the aluminium powder of getting angry of mixture gross weight 0.05% purity in the step (3) 〉=98%, enters stirrer and mixes to evenly, then pours the mixed slurry that stirs into the 32min that gets angry in the mould rapidly;
(6) get angry finish after, precuring is 4 hours under 70 ℃ of temperature, treats that the specification that blank strength reaches behind the 1.0MPa as required cuts;
(7) after cutting is finished, the autoclaved lightweight concrete mould is removed, the base substrate that cuts forms building block, and the building block that cuts is delivered in the autoclave to press temperature be steam-cured 3h under 80 ℃ the condition according to steaming, and then is forced into 0.8MPa, carries out 4 hours steam press maintenances again;
(8) after steam press maintenance finished, building block ageing under natural condition (being the state of natural temperature and humidity) got final product in 7 days.
The every performance index of air-entrained concrete building block such as the table 5 that obtain according to above-described embodiment:
Table 5 test block performance index
By table 5 as can be seen, the autoclaved aerated building block of producing according to above-mentioned proportioning can reach A1.5 in the JC1062-2007 foam concrete block standard, the building block mark of B08 grade.
The air-entrained concrete building block that obtains by above embodiment compares table specific as follows by detecting with the foam concrete block standard index:
Table 6 the present invention detects data and the foam concrete block standard index compares
The present invention has utilized the industrial residues such as special slag that prosperous company obtains after with slag and iron slag comprehensive treating process and tailing slag that shaken by Taizhou, sharp useless rate 〉=80% in a large number.Proportioning raw materials in adopting proper range, the introducing of modifier and compound additive can be optimized product properties; In addition, adopt specific steaming pressuring curing system can improve drying shrinkage value and the anti-freezing property of goods.Quality product of the present invention can meet industrial service requirements of building by laying bricks or stones with civilian skeleton construction non-bearing external and internal wall.
Claims (2)
1. air-entrained concrete building block that utilizes special slag and tailing slag to produce is characterized in that the feed composition of described air-entrained concrete building block and weight percent thereof are:
In above material, add the water of 0.5～0.6 times of the admixture B of the admixture A of its gross weight 1%, above material gross weight 0.05% and above material gross weight;
Wherein: described special slag is the slag that the blast furnace ironmaking production technique by a kind of recycle slag and metallurgy, chemical industry iron slag obtains, pass through conventional shrend granulation again after, its water ratio is 10%～15%, the slag of particle diameter≤5mm; The component of described slag and mass percent are: 38.12%SiO
2, 38.01%CaO, 10.15%MgO, 10.94%Al
2O
3, 0.14%FeO, 0.23%Fe
2O
3, 0.10%MnO, 1.40%S, 0.15% free magnesium f-CaO, other are 0.76% years old;
Described tailing slag is that the slag of being discharged by steel mill steel-making is behind conventional fragmentation, screening, magnetic separation process, particle diameter≤the 20mm that selects, water ratio is 10%～15%, composition requires: full iron TFe≤16%, Armco magnetic iron MFe≤2%, free calcium oxide f-CaO≤4%, the tailing slag of free magnesium f-MgO≤0.2%;
Described modifier is by any several the mixing in quartz sand, bauxitic clay, silicon powder, flyash, clay, volcanic ash, zeolite, the coal-fired slag;
Described admixture A is mixed by one or both and trolamine in sodium lignosulfonate, sodium hydroxide, the sodium sulfate, in the ethylene glycol one or both, the former accounts for 70～90% of compound additive gross weight, 10～30% of latter's compound additive gross weight to mix the back;
Described admixture B is the aluminium powder of getting angry of Chun Du ≧ 98%.
2. the production method of utilizing the air-entrained concrete building block that special slag and tailing slag produce described in the claim 1 is characterized in that may further comprise the steps:
(1) adopting described special slag is the slag that the blast furnace ironmaking production technique by a kind of recycle slag and metallurgy, chemical industry iron slag obtains, pass through conventional shrend granulation again after, its water ratio is 10%～15%, the speciality slag of particle diameter≤5mm; The component of described slag and mass percent are: 38.12%SiO
2, 38.01%CaO, 10.15%MgO, 10.94%Al
2O
3, 0.14%FeO, 0.23%Fe
2O
3, 0.10%MnO, 1.40%S, 0.15% free magnesium f-CaO, other are 0.76% years old;
(2) will make steel the slag of discharging through conventional fragmentation, screening and magnetic separation process after, select particle diameter≤20mm, water ratio is 10%～15%, composition requires: full iron TFe≤16%, Armco magnetic iron MFe≤2%, free calcium oxide f-CaO≤4%, the tailing slag of free magnesium f-MgO≤0.2%;
(3) convert according to the feed composition weight percent of air-entrained concrete building block described in the claim 1 and take by weighing the special slag that step (1) obtains, tailing slag and cement clinker, gypsum and the modifier that step (2) obtains, and with its mixing;
(4) material that mixes in the step (3) is mixed the admixture A of its mixture gross weight 1% outward after, add the water mix grinding, wherein add water weight and be 0.5～0.6 times of mixture gross weight in the step (3), mix grinding reaches the 0.08mm square hole sieve and tails over≤10% regulation fineness after, it is carried out the routine heating; Described admixture A is mixed by one or both and trolamine in sodium lignosulfonate, sodium hydroxide, the sodium sulfate, in the ethylene glycol one or both, the former accounts for 70～90% of compound additive gross weight, 10～30% of latter's compound additive gross weight to mix the back;
(5) to be heated reaching when getting angry 50～55 ℃ of temperature, mix the admixture B of mixture gross weight 0.05% in the step (3), enter conventional stirrer and mix to evenly, then pour the mixed slurry that stirs into the 25～35min that gets angry in the autoclaved lightweight concrete mould rapidly; Described admixture B is the aluminium powder of getting angry of Chun Du ≧ 98%;
(6) get angry finish after, precuring is 2～4 hours under 60～70 ℃ of temperature, treats that the specification that blank strength reaches behind 0.7～1.0MPa as required cuts;
(7) after cutting is finished, the autoclaved lightweight concrete mould is removed, and the base substrate that cuts forms building block, and the building block that cuts is delivered in the autoclave to press temperature be steam-cured 3-5h under 70～80 ℃ the condition according to steaming, and then be forced into 0.8～1.0MPa, carry out 5～8 hours steam press maintenances again;
(8) after steam press maintenance finished, building block ageing under field conditions (factors) got final product in 3～7 days.
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