CN103880471A - Method for producing aerated concrete block - Google Patents
Method for producing aerated concrete block Download PDFInfo
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- CN103880471A CN103880471A CN201410056077.0A CN201410056077A CN103880471A CN 103880471 A CN103880471 A CN 103880471A CN 201410056077 A CN201410056077 A CN 201410056077A CN 103880471 A CN103880471 A CN 103880471A
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Abstract
The invention relates to the field of a concrete block, and particularly relates to a method for producing an aerated concrete block. The method comprises the following steps: preparing the following raw materials in parts by weight: 3770-3830 parts of fly ash slurry, 590-610 parts of quick lime, 50-70 parts of cement and 16-17 parts of aluminum liquid; putting the fly ash slurry into an agitator, and discharging in order; casting after agitating, and standing still for 85-100 minutes after casting is finished, and then cutting; putting the cut aerated concrete block blank into a steam-curing car and steaming by a still kettle. The raw materials and the parts by weight of the raw materials of the aerated concrete block are strictly restrained respectively, and meanwhile, the production process is controlled accurately, so that the produced aerated concrete block is high in quality and low in breakage rate, and therefore the target of "high yield and high efficiency, high quality and low consumption" is reached.
Description
Technical field
The present invention relates to solidifying earth building blocks field, specifically a kind of air-entrained concrete building block production method.
Background technology
Air-entrained concrete building block is the novel energy-saving construction materials for wall of a kind of lightweight, porous.It is good that it has lightweight, good heat insulation, sound insulation, heat-proof quality, the feature such as can process and do not burn.The interstitital texture of going along with sb. to guard him that is widely used in industry and covil construction, has become a kind of material of construction that many countries widely popularize and develop.
Air-entrained concrete building block production technology parameter mainly comprises: 1, flyash slip index: water ratio, diffusibleness; 2, useless slurry diffusibleness and with addition of ratio; 3, raw materials quality index parameter; 4, raw material weight ratio of components; 5, cast churning time, temperature, diffusibleness; 6, rest time and temperature; 7, cutting temperature and hardness; 8,8 key elements such as autoclave vapor pressure, temperature parameter control.
Between above-mentioned 8 air-entrained concrete building block production technology parameters, there is Close relation, between them, mutually restrict, influence each other.In production operation process in the past, a certain of our too single strict control or certain two production technology parameter, ignore the technical parameter that other are associated, to such an extent as to, the fluctuation of production process technical parameter changes very large, quality product is extremely unstable, and breakage rate is more than 5%, and production cost is high for a long time.All cannot meet the requirement of air-entrained concrete building block " high-yield and high-efficiency, high quality and low cost ", must take into full account the reasonable control interval of above-mentioned 8 key elements, the Matching and modification of reasonably optimizing air-entrained concrete building block production key process technology parameter, realizes " high-yield and high-efficiency, high quality and low cost " target.
Summary of the invention
Technical problem to be solved by this invention is: how to make air-entrained concrete building block steady quality, breakage rate, below 5%, reaches high-yield and high-efficiency, high quality and low cost.
The technical solution adopted in the present invention is: air-entrained concrete building block production method, carry out in accordance with the following steps:
Step 1, according to mass percent: 3770～3830 parts of flyash slips, 590～610 parts of unslaked limes, 50～70 parts of cement, 16～17 parts of aluminium powder liquid are ready to;
Step 2, puts into stirrer flyash slip, after stirring 50 seconds, puts into unslaked lime, puts into cement after discharging unslaked lime again, stirs after 210 seconds, puts into aluminum paste, continues to stir after 20 seconds, and compound is injected in mould vehicle;
Step 3,, apart from mold bottom height 200mm, pours into a mould with the speed of cast per second 50mm height when mould vehicle feed opening starts to pour into a mould die casting by mould vehicle, pours into a mould while promotes feed opening, until casting complete;
Step 4, starts cutting, cutting speed in feet per minute: 60mm/s, temperature: 85 ± 2 ℃ after the 85 min～100min that rests;
Step 5, the aerated concrete building block green bodies of well cutting is put into steaming maintaining vehicle, being evacuated down to pressure is 0.06Mpa, start to pass into water vapor and boost, be more than or equal to 2h pressure rising time, final pressure is more than or equal to 1.2Mpa, keep 174 ℃～200 ℃ of temperature, constant voltage is more than or equal to 6 hours and starts exhaust vapour step-down, and step-down time 2h, till steam is discharged completely.
As a kind of optimal way: flyash slip water ratio mass percent is 42 ± 2%, diffusibleness: 30 ± 1cm, flyash loss on ignition≤8% of configuration flyash slip, according to sub-screen over-size≤45% of Mass Calculation 200 mesh sieve.
As a kind of optimal way: the flyash of configuration flyash slip according to the sub-screen over-size of Mass Calculation 200 mesh sieve 10% ~ 15%.
As a kind of optimal way: unslaked lime index request, the efficient oxidation calcium mass percentage content is 55%～70%, oxidation rate: 15 min～25min; Digestion condition: 50 ℃～60 ℃.
As a kind of optimal way: the aluminium powder cream index request of making aluminium powder liquid: solid part >=65%, effectively aluminium mass percentage content >=85%, raising rate≤12min, 0.075mm sieve screen over-size≤3%; In aluminium powder pulping tank, first add 7 parts of water according to part by weight, then add 1 part of aluminium powder cream, start whipping device 5 minutes, stir and be aluminium powder liquid.
The invention has the beneficial effects as follows: strict restriction has been made respectively in raw materials quality and the score of the present invention to air-entrained concrete building block, production process has been carried out to accurate control simultaneously, air-entrained concrete building block quality that the present invention is produced is high, breakage rate is low, has reached realization " high-yield and high-efficiency, high quality and low cost " target.
Embodiment
1, determine the control of raw materials quality reference index;
(1) flyash index request: loss on ignition≤8%, fineness (i.e. the sub-screen over-size of 200 mesh sieve)≤45%.
(2) unslaked lime index request: effectively ACaO:55～70%; Oxidation rate: 15～25min; Digestion condition: 50～60 ℃.
(3) aluminium powder cream index request: solid part >=65%, AAL >=85%, raising rate≤12min, fineness (0.075 ㎜ sieve screen over-size)≤3%.
(4) cement index request: cement is normal silicate 32.5 cement.
2, optimized production process technical process parameter;
(1) unslaked lime processing fineness requirement: after unslaked lime passes through jaw crusher fragmentation, ball mill is levigate, the sub-screen over-size of 200 mesh sieve is 10 ~ 15%.If unslaked lime fineness exceedes 15%, increase in time 3% of district's steel ball in ball mill, or adjust ball mill hour mill ash amount, suitably increase air-entrained concrete building block waste material amount.
(2) aluminium powder cream storage area requires: envrionment temperature≤40 degree, No burning.
(3) useless slurry with addition of ratio: useless slurry is cutting, goes the waste material and the circulation flushing water that produce in bed material process to mix, and returns to the useless slurry tank recycle of feed circuit after stirring, and participates in the slurrying of flyash slip, and useless slurry is 30% with addition of ratio.
(4) flyash slip index request: water ratio: 42 ± 2%, diffusibleness: 30 ± 1cm.
(5) aluminium powder cream pulping process requires: in aluminium powder pulping tank, first add 7 parts of water according to part by weight, then add 1 part of aluminium powder cream, start whipping device 5 minutes, stir.
3, production technology parameter matching set-up procedure and method;
(1) ingredients by weight ratio: 3770～3830 parts of flyash slips; 590～610 parts of unslaked limes; 50～70 parts of cement; 16～17 parts of aluminium powder liquid;
Above-mentioned every part is 1Kg.Requiring with addition of amount sum of unslaked lime and cement is 660 Kg.
If Lime Quality is poor, effectively ACaO is less than 55%, and unslaked lime is with addition of measuring 590 parts of lower limits, and cement is got with addition of 70 parts of the amount upper limits.
(2) blanking sequence requirement: flyash slip-unslaked lime-cement-aluminum paste
(3) churning time requires: the blanking of flyash slip starts lower unslaked lime after stirring 50 seconds, more lower cement, stirs after 210 seconds, detects cast diffusibleness (20 seconds used times), finally descends aluminum paste, continues to stir after 20 seconds, will expect to inject in mould vehicle.
(4) cast index request: diffusibleness 15 ± 1 cm: teeming temperature: 47 ± 1 degree.
(5) feed opening telescopic head lowering position and lift velocity require: it is that lower port is apart from mold bottom height 200mm that feed opening telescopic head lowering position requires; After starting 2 seconds of blanking, telescopic head is according to 50 mm/ lift velocity second, till being raised to telescopic head upper limit position always.
(6) rest operation require:
1. be poured into mould and start timing, within 1.5 ~ 3.0 minutes mould vehicle move on to the chamber of resting pause put in place;
2. after this within 60min transfixion and also avoid vibration;
3. be poured into mould and start timing, the base substrate time of resting is 80～95min;
4. bubbling is got angry and the thickening time is 15 ~ 60 minutes;
5. end to the abundant setting time of getting angry is 60 ~ 90 minutes.
(7) cutting action requires: cutting speed in feet per minute: 60mm/s, rests the time: 85～100min, temperature: 85 ± 2 degree.If there is cutting crackle in end, illustrate that the inside and outside hardness of base substrate is inconsistent, outside hardness is moderate, due to inside is really up to the mark.Can reduce cutting speed in feet per minute is: 40mm/s, prevents that base substrate really up to the mark rear portion, base substrate middle part pierce tap from falling building block.
(8) autoclave steam pressure processing requirement: the aerated concrete building block green bodies of well cutting is placed on steaming maintaining vehicle successively, and each steaming maintaining vehicle is put 3 aerated concrete building block green bodies, 6 steaming maintaining vehicles are 1 group (18 mould), pushing tow enters in autoclave; Close the still door of autoclave both sides.
Complete steam-cured process through vacuumizing, pass into the middle pressure steam steps such as intensification, constant voltage constant temperature, step-down cooling of progressively boosting; Specific requirement is, the pressure vacuumizing is about 0.06Mpa, starts to pass into raise steam, is not less than 2h pressure rising time, and the pressure that boosts is progressively raised to and is not less than 1.2Mpa; Start constant voltage, constant voltage (time) is not less than 6h, and pressure is not less than 1.2Mpa, and temperature is 174～200 ℃; The step-down time is about 2h, steam in autoclave is imported in advance to the autoclave that need to boost, after 0.5 Mpa, be switched to waste gas recovery vehicle entrance until autoclave pressure equilibrium, until steam (in still, pressure is 0) in whole drained autoclaves can be opened autoclave door.
Within 2012, Stainless-steel Jiont Stock Company of Taiyuan Iron&Steel Complex produces 300000 m per year
3air-entrained concrete building block production line annual production 32.8 ten thousand m
3, super design output 2.8 ten thousand m
3.Air-entrained concrete building block product qualified rate had brought up to 99.0% by 96.5 of the past, had improved 2.5%.According to 92 yuan/m of product cost
3, 120 yuan/m of selling price (not containing tax containing freight charges)
3, this patent contribution coefficient is 0.6 calculating.
Economic benefit calculation: 32.8 ten thousand m
3× 0.6 × (120-92) unit/m
3=551 ten thousand yuan.
Claims (5)
1. air-entrained concrete building block production method, is characterized in that carrying out in accordance with the following steps:
Step 1, according to mass percent: 3770～3830 parts of flyash slips, 590～610 parts of unslaked limes, 50～70 parts of cement, 16～17 parts of aluminium powder liquid are ready to;
Step 2, puts into stirrer flyash slip, after stirring 50 seconds, puts into unslaked lime, puts into cement after discharging unslaked lime again, stirs after 210 seconds, puts into aluminum paste, continues to stir after 20 seconds, and compound is injected in mould vehicle;
Step 3,, apart from mold bottom height 200mm, pours into a mould with the speed of cast per second 50mm height when mould vehicle feed opening starts to pour into a mould die casting by mould vehicle, pours into a mould while promotes feed opening, until casting complete;
Step 4, starts cutting, cutting speed in feet per minute: 60mm/s, temperature: 85 ± 2 ℃ after the 85 min～100min that rests;
Step 5, the aerated concrete building block green bodies of well cutting is put into steaming maintaining vehicle, being evacuated down to pressure is 0.06Mpa, start to pass into water vapor and boost, be more than or equal to 2h pressure rising time, final pressure is more than or equal to 1.2Mpa, keep 174 ℃～200 ℃ of temperature, constant voltage is more than or equal to 6 hours and starts exhaust vapour step-down, and step-down time 2h, till steam is discharged completely.
2. air-entrained concrete building block production method according to claim 1, it is characterized in that: flyash slip water ratio mass percent is 42 ± 2%, diffusibleness: 30 ± 1cm, flyash loss on ignition≤8% of configuration flyash slip, according to sub-screen over-size≤45% of Mass Calculation 200 mesh sieve.
3. air-entrained concrete building block production method according to claim 2, is characterized in that: the flyash of configuration flyash slip according to the sub-screen over-size of Mass Calculation 200 mesh sieve 10% ~ 15%.
4. air-entrained concrete building block production method according to claim 1, is characterized in that: unslaked lime index request, and the efficient oxidation calcium mass percentage content is 55%～70%, oxidation rate: 15 min～25min; Digestion condition: 50 ℃～60 ℃.
5. air-entrained concrete building block production method according to claim 1, it is characterized in that: the aluminium powder cream index request of making aluminium powder liquid: solid part >=65%, effectively aluminium mass percentage content >=85%, raising rate≤12min, 0.075mm sieve screen over-size≤3%; In aluminium powder pulping tank, first add 7 parts of water according to part by weight, then add 1 part of aluminium powder cream, start whipping device 5 minutes, stir and be aluminium powder liquid.
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| CN201410056077.0A CN103880471A (en) | 2014-02-19 | 2014-02-19 | Method for producing aerated concrete block |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110436841A (en) * | 2019-09-05 | 2019-11-12 | 徐州永腾建材有限公司 | A kind of production technology of air-entrained concrete building block |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396072A (en) * | 2013-08-08 | 2013-11-20 | 太原钢铁(集团)有限公司 | Autoclaved fly ash aerated concrete blank manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396072A (en) * | 2013-08-08 | 2013-11-20 | 太原钢铁(集团)有限公司 | Autoclaved fly ash aerated concrete blank manufacturing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436841A (en) * | 2019-09-05 | 2019-11-12 | 徐州永腾建材有限公司 | A kind of production technology of air-entrained concrete building block |
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Application publication date: 20140625 |