CN101289326A - Process for preparing vapour pressure air-entrained concrete light heat-insulation fireproof bricks by porcelain clay tailings - Google Patents
Process for preparing vapour pressure air-entrained concrete light heat-insulation fireproof bricks by porcelain clay tailings Download PDFInfo
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- CN101289326A CN101289326A CNA200810071185XA CN200810071185A CN101289326A CN 101289326 A CN101289326 A CN 101289326A CN A200810071185X A CNA200810071185X A CN A200810071185XA CN 200810071185 A CN200810071185 A CN 200810071185A CN 101289326 A CN101289326 A CN 101289326A
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- porcelain clay
- light heat
- pressure air
- vapour pressure
- clay tailings
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Abstract
The invention relates to a firebrick preparation method, in particular to a method of preparing an autoclaved aerated concrete light heat insulating firebrick with porcelain clay tailings. The invention takes the porcelain clay tailings as the main raw material, a certain amount of cement, lime, foam stabilizer of nekal bx or soap pod powder and aluminum power paste are added, and then plaster and self-made compound admixtures are added to prepare into a sizing agent. The later preparing procedures are as follows: pour mold for gas-molding and stilling, dry heat pre-curing, cutting and stacking, being steamed in a caldron and being taken out of the caldron, and finally the firebrick is formed. The firebrick is put into the caldron to steam for 5 to 7 hours under constant voltage; the steam pressure is 1.1 to 1.5 MPa and the temperature is from 185 DEG C to 195 DEG C. The firebricks prepared by the method have good effect of thermal insulation in stove owing to low coefficient of heat conductivity, thereby being used in the low temperature section of ceramics kiln collapses, tunnels, resistance furnace and being capable of realizing energy saving. The firebricks prepared by the method also have the advantage of being light owing to the volume and density being less than those of the majority of light heat insulating firebricks.
Description
Technical field
The present invention relates to a kind of preparation method of refractory brick, relate to a kind of method of utilizing porcelain clay tailings to prepare vapour pressure air-entrained concrete light heat-insulation fireproof bricks specifically.
Technical background
Refractory brick is widely used in industry smelting, forging, porcelain such as fire at thermal kiln furnace, becomes indispensable important materials.Along with development of technology, refractory brick also develops into various light fire bricks by heavy refractory brick gradually.Light fire brick is by the gentle phase composite of solid phase, and gas forms isolated gas and pricks in gu body brick, and therefore, the thermal conductivity of light fire brick is lower, plays better heat-insulation and heat-preservation effect in thermal kiln furnace.At present, produce the pore-forming material of the raw material of light fire brick both at home and abroad except necessity, as float pearl, perlite, vermiculite, silicon bath soil and artificial hollow ball and used a large amount of clay water slurries outward, simultaneously, on the method for producing light fire brick, nothing more than adopting with the mud injection model that configures, drying makes traditional casting of adobe, with the extrusion molding in vacuumizing mud extruder of prefabricated pug, with brick blank drying, be cut into the casting of goods and utilize brick pressing machine the adobe material to be pressed into the machine platen press of adobe.But because of adding moisture content many, green strength is low, the carrying cracky, drying time is long, it is many to cut the mill clout, also is generally natural or synthetical contains the hole material even if add the pore-forming material of necessity.The adding of these aglites, the one, raw materials cost significantly improves, and the 2nd, the brick in-vivo tissue constitutes inhomogeneous, and the matrix part is comparatively fine and close, and brick body thermal conductivity increases, and having increased is heated collapses the probability that mistake bursts, and thermal shock resistance reduces.
Along with the development of society and the progress of science and technology, development through twenties years, people have invented and have partly adopted flyash, waste stone powder, mine waste, be equipped with lime, concrete, foaming agent and substitute the method that clay prepares aerated concrete light-brick, the New Building Materials that utilize these methods to produce reach the purpose that energy-saving and environmental protection and waste utilize again.However, aerated concrete light-brick also only belongs to the notion of common brick, does not have the function of insulating refractory.
China clay has another name called " kaolin ", is the main raw material of pottery.It is gained the name with near the high mountain range the Chinese Jing Dezhen of originating in the first in the world kiln factory.The composition of pure china clay is: SiO
246.51%, Al
2O
339.54%, H
2O 13.95%, and fusibility is 1780 ℃.Because the continuous expansion of Production of Ceramics scale, the unordered discharging of a large amount of china clay wastes causes the water and air in the environment more and more dirtier, and it is exactly one of the most tangible sign that trunk river water quality is changed in quality.For this reason, how to reduce in recent years or directly utilize the waste of china clay to become a big hot issue of society.
Guangdong Dongbao Group Co., Ltd. has proposed " recycling the method for porcelain clay tailings and the porcelain mud that makes thereof " (application number: patented technology 200710029184), the porcelain mud of attempting to recycle the method for porcelain clay tailings and making, the composition that comprises porcelain clay tailings, high-alumina clay, magnesia mineral, sodium based fluxing agent and softening agent adds water for ball milling becomes porcelain mud.This invention has solved part tailings pollution problem, and porcelain clay tailings can be widely used in the production of household china, bone china and sanitary ware, and the porcelain mud cost of making also reduces 20～30% than existing ordinary porcelain mud.Fujian Wanqi Nonmetallic Material Co., Ltd. and Fujian Normal University's chemistry utilize porcelain clay tailings development and production steam-pressing aero-concrete with Materials Academy, achieve success, and obtain good society, economic benefit.
Yet, utilize porcelain clay tailings to prepare aerated concrete light refractory brick and but do not see relevant report and patented technology.Aerated concrete light refractory brick is not only different in application facet with common aerated concrete light-brick, has more substantial difference on the preparation method.Because of light fire brick will guarantee higher refractoriness, therefore, on the composition and proportioning of raw material, common aerated concrete light-brick is with the mine waste, it is main being equipped with lime, concrete, foaming agent, and aerated concrete light refractory brick must add the raw material of necessary high temperature resistant, multiple hole.
Gypsum (dihydrate gypsum, plaster stone), its composition (wB%) is: CaO
32.5, SO
346.6, H
2O20.9, composition changes little.Mechanical tramp materials such as clay, organic matter are often arranged.Sometimes contain SiO
2, Al
2O
3, Fe
2O
3, MgO, Na
2O, CO
2, impurity such as Cl.Gypsum is generally white, colourless, and colourless transparent crystal is called selenite, sometimes because of impure ash, pale yellow, the shallow brown isochrome of forming.Streak white, transparent.Gypsum exists 3 to discharge the crystal water stage during heating: 105～180 ℃, at first discharge 1 water molecules, and immediately discharge water molecules half, change the bassanite that contains 5 crystal water into, also claim the plaster of Paris or semi-hydrated gypsum.200～220 ℃, discharge remaining half water molecules, change III type anhydrite into.About 350 ℃, change II type gypsum Ca[SO into
4].Further change I type anhydrite in the time of 1120 ℃ into.1450 ℃ of melt temperatures.The microvoid structure of gypsum and goods thereof and thermal dehydration make it the good sound insulation of tool, heat insulation and fire resistance.
Summary of the invention
Purpose of the present invention will utilize porcelain clay tailings to prepare vapour pressure air-entrained concrete light heat-insulation fireproof bricks exactly.For realizing that purpose of the present invention adopts technical scheme to be: be main raw material with the porcelain clay tailings, on the basis that adds a certain amount of cement, lime, suds-stabilizing agent, aluminium powder cream batching, add a certain amount of gypsum and self-control compound additive, make slurry, injection molding get angry with quietly stop, xeothermic precuring, cut stacking, go into still steam-cured, go out still, form finished product refractory brick at last.
By weight percentage, concrete prescription is:
Porcelain clay tailings 55-75
Cement 13-25
Lime 10-19
Gypsum 1.0-3.5
Suds-stabilizing agent 0.05-0.08
Aluminium powder cream 0.05-0.08
Self-control compound additive 0.05-0.10
Cement of the present invention is meant the bulk cement and the sack cement of various labels;
Suds-stabilizing agent of the present invention is meant and draws back powder or Chinese honey locust powder.Adopt suds-stabilizing agent of the present invention that bubble is played firm effect, can reduce the surface tension of solid-liquid-gas three-phase system, the physical strength of bubble chamber film in the increase system prevents the bubble slurry boiling that the causes mould that collapses that breaks, thereby reaches the moulding purpose.Suds-stabilizing agent metal surface active substance, its effect are the surface tension that reduces water, increase the physical strength of bubble chamber film.
Aluminium powder cream of the present invention is meant that the high-purity aluminium powder of high-quality atomizes through high temperature, is medium with water, adds special water solvent and grinds refining silver gray, the flakey powder that processes.Have the active aluminum height, easily be scattered in water, abundant, the easy to use characteristics such as stable of getting angry.
Self-control compound additive of the present invention is meant the mixture of rosin amine soap and triterpenoid saponin, adds before injection molding.Be that 1: 3～3: 1 ratio joins and mixes in the consubstantiality ponding and can use in the ratio between it earlier during preparation with rosin amine soap, triterpenoid saponin raw material.
Mine tailing and gypsum quantitatively add water when slurrying, help once making the suitable slip of concentration.Slip pumps in the proportioning building slip storage tank standby by slush pump.
Block lime is through physical pendulum formula jaw crushing crusher machine; During grinding, lime by the storehouse at the bottom of disk feeder feed and carry out combined grinding in the atomizer mill.Lime powder after levigate is delivered to chapelet through worm conveyor, delivers in the proportioning building lime powder feed bin standby by chapelet.
Aluminium powder cream is poured in the aluminium powder stirrer and is made suspension by human metering, and every mould preparation once; The suspension that stirs is directly put into the cast stirrer.
In batching, stirring and the cast, lime, cement by the storehouse at the bottom of feeding machine send in the electronics powder weighing balance, delivered in the cast stirrer by worm conveyor after cummulative metering, mixing can be poured into a mould behind the aluminium powder cream, suds-stabilizing agent and the self-control compound additive that add on-the-spot preparation.The amount that is added is unit with the mould.
Base substrate after the cutting is drawn in by slow-motion hoist that to go into still in the still steam-cured, the steam-cured time 5～7h of constant voltage, vapor pressure 1.1MPa～1.5MPa, 190 ℃ ± 5 ℃ of temperature.
The scrap stock that cut down for cutting machine fall into the bottom skewed slot, wash to the useless stock tank in cutting machine bottom through water, after pulling an oar by vertical slush pump pump to the casting molding machine in the flushing waste water pond, carry out stirring pulping together with part flushing waste water in the pond, after reaching finite concentration, pump in the useless slurry storage tank in the proportioning building standby by slush pump again.
Adopt the vapour pressure air-entrained concrete light heat-insulation fireproof bricks of method preparation of the present invention, [under the normal temperature, its thermal conductivity has only 0.08～0.18W/ (mK) because the thermal conductivity of air-entrained concrete light heat-insulation refractory brick is low.Only be equivalent to 1/15 of normal concrete, 1/10 of clay brick.Therefore, it is used for the heat insulation effect with excellence of stove, can reduce scattering and disappearing of kiln body temperature degree significantly, improve the temperature in the kiln, cut down the consumption of energy, energy-saving effect is remarkable, good heat-insulation effect can be used for low-temperature zone such as ceramic kiln collapse, tunnel, resistance furnace, can reach purpose of energy saving.Simultaneously because the volume density of vapour pressure air-entrained concrete light heat-insulation fireproof bricks has only 0.4～0.7g/cm
3, promptly every cubic metre is had only 400～700kg, is lower than most of light fire bricks.In various light thermal-shield refractory goods, it belongs to minimum a kind of of density.Alumina hollow ball insulating product for example, volume density 1.2～1.6g/cm
3, be 2～4 times of this product.The volume density of high alumina matter foamed light insulating fire brick is 0.5～1.0g/cm
3, also high a lot of than this brick.And the volume density of lightweight silica heat-proof firebrick is 0.8～1.2g/cm
3, be 1～2 times of this product.Compare with above-mentioned like product, this vapour pressure air-entrained concrete light heat-insulation fireproof bricks volume density is little, lightweight.
Light fire brick of the present invention is widely used on the industrial furnace and high temperature service of departments such as metallurgy, machinery, chemical industry, oil, building, light industry, electric power.Over-all propertieies such as its use properties, physical strength, high thermal resistance, thermal conductivity are better than existing various middle-grade light fire brick.All use temperatures all can be used air-entrained concrete light heat-insulation refractory brick product at the various hot industry stoves below 1300 ℃, and its purposes is very extensive.
Embodiment
Embodiment 1
(1) 54kg gypsum and 540kg lime are carried out combined grinding and reach pre-activation treatment in atomizer mill, make plaster stone ash powder, deliver in the lime powder feed bin standby through chapelet.
(2) get the 3000kg porcelain clay tailings ball mill to the mineral aggregate bucket in, progressively add ball mill and carry out levigately, control ore pulp degree is about 60%, ball mill limit edging adds altogether the water of about 2000kg and makes slurry, and pumps in the slip storage tank standby by slush pump.
(3) get to the sack cement of 800kg PC32.5R in the cement storage tank standby.
(4) every cast one mould (2.72m
3) get 1.25kg aluminium powder cream, 1.10kg and draw back powder and 2.20kg self-control compound additive (rosin amine soap: triterpenoid saponin=3: 7), drop into and to pour standby in the aluminium powder storage tank (above-mentioned aluminium powder cream, suds-stabilizing agent, self-control compound additive can only on-the-spotly be equipped with and use, and are unit with the mould) into after stirring into 5% water system suspension in the aluminium powder stirrer.
(5) after the required material of above-mentioned various prescriptions is carried out batching, by processing requirement, to pour into a mould a mould (2.72m
3) calculate, add 2100kg mine tailing slurry (accounting for batching gross dry weight 65.23%), 27kg gypsum (accounting for 1.40%) and 270kg lime powder (accounting for 13.98%), 360kg cement (accounting for 19.16%) by weight percentage successively, after fully stirring, add the aqueous solution such as aluminium powder cream that prepare in the step (4) again, after fully stirring again, by predefined mould slip is poured into a mould, quiet stop just supporting reach cut after the cutting intensity, the demoulding.
(6) be transferred to enter on the steam-cured dolly and carry out steam press maintenance in the still, the steam-cured time 7h of constant voltage, vapor pressure 1.3MPa, 195 ℃ of temperature.
Embodiment 2
(1) 70kg gypsum and 770kg lime are carried out combined grinding and reach pre-activation treatment in atomizer mill, make plaster stone ash powder, deliver in the lime powder feed bin standby through chapelet.
(2) get the 3000kg porcelain clay tailings ball mill to the mineral aggregate bucket in, progressively add ball mill and carry out levigately, control ore pulp degree is about 61%, ball mill limit edging adds altogether the water of about 1900kg and makes slurry, and pumps in the slip storage tank standby by slush pump.
(3) get to the sack cement of 720kg PC42.5R in the cement storage tank standby.
(4) every cast one mould (2.72m
3) get 1.35kg aluminium powder cream, 1.15kg Chinese honey locust powder and 2.0kg self-control compound additive (rosin amine soap: triterpenoid saponin=4: 6), drop into and to pour standby in the aluminium powder storage tank (above-mentioned aluminium powder cream, suds-stabilizing agent, self-control compound additive can only on-the-spotly be equipped with and use, and are unit with the mould) into after stirring into 5% water system suspension in the aluminium powder stirrer.
(5) after the required material of above-mentioned various prescriptions is carried out batching, by processing requirement, calculate to pour into a mould a mould, add 2000kg mine tailing slurry, 35kg gypsum and 335kg lime powder, 360kg cement by weight percentage successively, after fully stirring, add the aqueous solution such as aluminium powder cream that prepare in the step (4) again, after fully stirring again, by predefined mould slip is poured into a mould, quiet stop just supporting reach cut after the cutting intensity, the demoulding.
(6) be transferred to enter on the steam-cured dolly and carry out steam press maintenance in the still, the steam-cured time 5h of constant voltage, vapor pressure 1.15MPa, 188 ℃ of temperature.
Embodiment 3
(1) 68kg gypsum and 700kg lime are carried out combined grinding and reach pre-activation treatment in atomizer mill, make plaster stone ash powder, deliver in the lime powder feed bin standby through chapelet.
(2) get the 3000kg porcelain clay tailings ball mill to the mineral aggregate bucket in, progressively add ball mill and carry out levigately, control ore pulp degree is about 62%, ball mill limit edging adds altogether the water of about 1850kg and makes slurry, and pumps in the slip storage tank standby by slush pump.
(3) get to the bulk cement of 800kg PC42.5R in the cement storage tank standby.
(4) every cast one mould (2.72m
3) get 1.3kg aluminium powder cream, 1.25kg Chinese honey locust powder and 1.8kg self-control compound additive (rosin amine soap: triterpenoid saponin=5: 5), drop into and to pour standby in the aluminium powder storage tank (above-mentioned aluminium powder cream, suds-stabilizing agent, self-control compound additive can only on-the-spotly be equipped with and use, and are unit with the mould) into after stirring into 5% water system suspension in the aluminium powder stirrer.
(5) after the required material of above-mentioned various prescriptions is carried out batching, by processing requirement, calculate to pour into a mould a mould, add 1900kg mine tailing slurry, 34kg gypsum and 350kg lime powder, 300kg cement by weight percentage successively, after fully stirring, add the aqueous solution such as aluminium powder cream that prepare in the step (4) again, after fully stirring again, by predefined mould slip is poured into a mould, quiet stop just supporting reach cut after the cutting intensity, the demoulding.
(6) be transferred to enter on the steam-cured dolly and carry out steam press maintenance in the still, the steam-cured time 6h of constant voltage, vapor pressure 1.5MPa, 185 ℃ of temperature.
Claims (5)
1, a kind of method of utilizing porcelain clay tailings to prepare vapour pressure air-entrained concrete light heat-insulation fireproof bricks, it is characterized in that with the porcelain clay tailings being main raw material and carrying out pre-activation treatment, after adding a certain amount of cement, lime, add aluminium powder cream, gypsum, suds-stabilizing agent and self-control compound additive again, be mixed with slurry jointly, through injection molding get angry with quietly stop, xeothermic precuring, cut stacking, go into still steam-cured, go out still, form vapour pressure air-entrained concrete light heat-insulation fireproof bricks at last, by weight percentage, concrete prescription is:
Porcelain clay tailings 55-75
Cement 13-25
Lime 10-19
Gypsum 1.0-3.5
Suds-stabilizing agent 0.05-0.08
Aluminium powder cream 0.05-0.08
Self-control compound additive 0.05-0.10.
2, the method for utilizing porcelain clay tailings to prepare vapour pressure air-entrained concrete light heat-insulation fireproof bricks according to claim 1 is characterized in that described suds-stabilizing agent is meant to draw back powder or Chinese honey locust powder.
3, the method for utilizing porcelain clay tailings to prepare vapour pressure air-entrained concrete light heat-insulation fireproof bricks according to claim 1, it is characterized in that described aluminium powder cream is to be atomized through high temperature by high-purity aluminium powder, with water is medium, adds special water solvent and grinds refining silver gray, the flakey powder that processes.
4, the method for utilizing porcelain clay tailings to prepare vapour pressure air-entrained concrete light heat-insulation fireproof bricks according to claim 1 is characterized in that described self-control compound additive is meant the mixture of rosin amine soap and triterpenoid saponin, and the ratio between it is 1: 3～3: 1.
5, the method for utilizing porcelain clay tailings to prepare vapour pressure air-entrained concrete light heat-insulation fireproof bricks according to claim 1 is characterized in that describedly going into still when steam-cured, the steam-cured time 5～7h of constant voltage, vapor pressure 1.1～1.5MPa, 190 ℃ ± 5 ℃ of temperature.
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|---|---|---|---|
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|---|---|---|---|
| CNA200810071185XA CN101289326A (en) | 2008-06-06 | 2008-06-06 | Process for preparing vapour pressure air-entrained concrete light heat-insulation fireproof bricks by porcelain clay tailings |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603246A (en) * | 2012-03-13 | 2012-07-25 | 宜兴市大东方实业有限公司 | Foamed cement heat insulation board and preparation method thereof |
| CN102875066A (en) * | 2012-08-25 | 2013-01-16 | 马鞍山豹龙新型建材有限公司 | Chromic slag aerated brick and preparation method thereof |
| CN102875073A (en) * | 2012-08-25 | 2013-01-16 | 马鞍山豹龙新型建材有限公司 | Aerated brick |
| CN102875068A (en) * | 2012-08-25 | 2013-01-16 | 马鞍山豹龙新型建材有限公司 | Building rubbish aerated concrete block and preparation method thereof |
| CN102976668A (en) * | 2012-09-20 | 2013-03-20 | 浙江武义神龙浮选有限公司 | Method for producing aerated concrete building block by using fluorite tailings |
| CN104386974A (en) * | 2014-10-09 | 2015-03-04 | 合肥向荣环保科技有限公司 | Method for preparing ore tailing thermal-insulation brick |
| CN104556915A (en) * | 2014-12-19 | 2015-04-29 | 安徽中龙建材科技有限公司 | High-temperature-resistant aerated building block and preparation method thereof |
-
2008
- 2008-06-06 CN CNA200810071185XA patent/CN101289326A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603246A (en) * | 2012-03-13 | 2012-07-25 | 宜兴市大东方实业有限公司 | Foamed cement heat insulation board and preparation method thereof |
| CN102603246B (en) * | 2012-03-13 | 2013-08-14 | 宜兴市大东方实业有限公司 | Foamed cement heat insulation board and preparation method thereof |
| CN102875066A (en) * | 2012-08-25 | 2013-01-16 | 马鞍山豹龙新型建材有限公司 | Chromic slag aerated brick and preparation method thereof |
| CN102875073A (en) * | 2012-08-25 | 2013-01-16 | 马鞍山豹龙新型建材有限公司 | Aerated brick |
| CN102875068A (en) * | 2012-08-25 | 2013-01-16 | 马鞍山豹龙新型建材有限公司 | Building rubbish aerated concrete block and preparation method thereof |
| CN102875066B (en) * | 2012-08-25 | 2014-08-20 | 马鞍山豹龙新型建材有限公司 | Chromic slag aerated brick and preparation method thereof |
| CN102875073B (en) * | 2012-08-25 | 2014-08-27 | 马鞍山豹龙新型建材有限公司 | Aerated brick |
| CN102875068B (en) * | 2012-08-25 | 2014-08-27 | 马鞍山豹龙新型建材有限公司 | Building rubbish aerated concrete block and preparation method thereof |
| CN102976668A (en) * | 2012-09-20 | 2013-03-20 | 浙江武义神龙浮选有限公司 | Method for producing aerated concrete building block by using fluorite tailings |
| CN104386974A (en) * | 2014-10-09 | 2015-03-04 | 合肥向荣环保科技有限公司 | Method for preparing ore tailing thermal-insulation brick |
| CN104386974B (en) * | 2014-10-09 | 2016-08-17 | 大连地拓重工有限公司 | Ore tailing insulating brick method processed |
| CN104556915A (en) * | 2014-12-19 | 2015-04-29 | 安徽中龙建材科技有限公司 | High-temperature-resistant aerated building block and preparation method thereof |
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Application publication date: 20081022 |