CN101746980A - Method for preparing high-performance light-weight insulating brick by using quartz mine - Google Patents
Method for preparing high-performance light-weight insulating brick by using quartz mine Download PDFInfo
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- CN101746980A CN101746980A CN200810229128A CN200810229128A CN101746980A CN 101746980 A CN101746980 A CN 101746980A CN 200810229128 A CN200810229128 A CN 200810229128A CN 200810229128 A CN200810229128 A CN 200810229128A CN 101746980 A CN101746980 A CN 101746980A
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Abstract
The invention relates to a method for preparing high-performance light-weight insulating bricks by using quartz mine. The method is that low-price natural high-quality quartz mine is used as basic raw material, the crushed natural quartzite and the soda ash react with each other and are prepared into water glass, framework material is filled and finally high-performance light-weight insulating bricks are obtained by using the sol-gel technology. The heat conductivity factor of the insulating bricks under room temperature is 0.05-0.06W/m.K and the density is 500-600Kg/m3. The effect is very excellent when the insulating bricks are used for long time in industrial furnaces with temperature no more than 1000 DEG C. Moreover, the insulating bricks can also be used in other places requiring heat isolation and heat insulation.
Description
Technical field
The present invention relates to a kind ofly prepare the method for high-performance light-weight insulating brick with quartz mine, it is basic raw material that this method adopts cheap natural high grade quartz ore, belongs to chemical building material manufacturing and applied technical field.
Background technology
Commercially available industrial furnace lining mostly is magnesia, aluminous fire brick with insulating brick now, and their thermal conductivity is higher, and what the stove outside temperature also rose after the burner hearth heating is very high, and body of heater heats up slowly like this, and thermosteresis is big, the current consumption height.So the invention provides a kind of method of high-performance light-weight insulating brick.The cost of material that this method adopts is cheap, and technology is simple, can well satisfy the needs that the life-time service temperature is no more than 1000 ℃ industrial furnace lining.
Summary of the invention
The objective of the invention is at above-mentioned the deficiencies in the prior art, a kind of to adopt cheap natural high grade quartz ore be that basic raw material preparation has the processing method of the industrial furnace lining of low heat conduction, low density machine-shaping, good heat insulating with insulating brick but provide.For achieving the above object, the present invention adopts following technical proposals: a kind ofly prepare the method for high-performance light-weight insulating brick with quartz mine, this method is that natural quartz ore and the soda ash that will pulverize are reacted into silicon salt.Through being packed into framework material after the reaction, and adopt sol-gel method to make basicity reduction in the silicon salt, thereby bring out the polyreaction of silicate, the poly-attitude silicate ion particle diameter of the height that colloidal particle form in the system is existed constantly increases, form silicon sol, along with the further reduction of system pH, SiO
2The micelle cohesion forms the silicon gel.
Concrete grammar:
(1) natural high grade quartz ore is pulverized.Get a certain amount of quartz mine stone and carry out jaw and break into ball milling behind the fritter, the quartzite powder that obtains is crossed 200 mesh sieves, stay and sieved part.
(2) quartz powder to (1) preparation set by step carries out the removal of impurities processing.Get a certain amount of quartz powder, add the hydrochloric acid of 0.7-1.2mol/L, make quartz powder soak the end fully in acid, stirred 4-5 hour.Add distilled water wash, be washed till and use AgNO
3Detection does not have chlorion, after the filtration with its oven dry.
(3) to the quartz powder raw material of (2) set by step preparation and soda ash in molar ratio 1: the ratio uniform mixing of 1.3-1.5, fusion in High Temperature Furnaces Heating Apparatus, the control glass melting temperature is 940-960 ℃ of maintenance 30 minutes, obtains sodium silicate solid.
(4) will be set by step (3) sodium silicate solid of making add distilled water after slowly cooling to room temperature, be heated to 90-100 ℃ of dissolving down, filter and obtain the settled solution that concentration is 0.1-0.2mol/L.
(5) the NaOH solution with 0.5-1.0mol/L washs into the pH value to anionite-exchange resin in the 11-11.5 scope, with the hydrochloric acid of 0.7-1.2mol/L Zeo-karb is washed into the pH value in the 1.5-2.5 scope.
(6) water glass solution that step (4) is obtained is slowly poured the 20cm length that step (5) is handled into, make the pH value of solution value in the 10.5-11 scope in the anion-exchange column of diameter 2cm, the solution that obtains is slowly poured the 20cm length that step (5) is handled again into, makes the pH value of solution value in the 4.5-5.5 scope in the cationic exchange coloum of diameter 2cm.
(7) to pour in the insulating brick mould and add the mullite fiber massfraction be 20-35% to the water glass solution that obtains to step (6), stirred 10-15 minute, makes fiber dispersion even, leaves standstill to wait for its gel.
(8) the gel block that step (7) is obtained takes out in the dehydrated alcohol that is placed on 70 ℃ and soaked 72 hours.Take out the 50-70 ℃ of oven dry in back.
(9) block that step (8) is obtained put into process furnace be rapidly heated to 600 ℃ of insulations until obtaining white block, obtain high-performance light-weight insulating brick after manually renovating.
The insulating brick of the present invention's preparation is compared with commercially available insulating brick following obvious advantage and effect:
1. the basic raw material of the preparation high-performance light-weight insulating brick of the present invention's employing is cheap natural high grade quartz ore.
2. excellent its thermal conductivity of the heat-proof quality of the high-performance light-weight insulating brick of the present invention's preparation is 0.05～0.06W/mK at room temperature, and thermal conductivity can only reach 0.1～0.2W/mK under the general insulating brick room temperature.
3. the high-performance light-weight insulating brick of the present invention preparation, its density is low only to be 500～600Kg/m
3
4. the stove overall weight with the high-performance light-weight insulating brick protection of the present invention preparation is light, the stove quick heating, and thermosteresis is little, and current consumption is low.
Embodiment
Embodiment 1
The basic raw material natural quartz stone ore place of production that the present invention adopts is the Faku County, Shenyang City.This ore overwhelming majority slightly is faint yellow for white, skin.It of high grade, SiO
2Content is more than 98.5%, and impurity has Fe
2O
3, Al
2O
3, CaO, MgO, Na
2O etc., other micronutrient levelss all are lower than limit of detection, do not contain crystal water.
With above-mentioned base-material,, adopt the sol-gel technique moulding to prepare high-performance light-weight insulating brick through being packed into framework material after the reaction.Its technological process is: natural high grade quartz ore is pulverized, got a certain amount of quartz mine stone and carry out jaw and break into ball milling behind the fritter, the quartzite powder that obtains is crossed 200 mesh sieves, stay and sieved part.To the hydrochloric acid that wherein adds 1.0mol/L, make quartz powder soak the end fully in acid, stirred 5 hours.Add distilled water wash, be washed till and use AgNO
3Detection does not have chlorion, after the filtration it is dried back and 1: 1.5 in molar ratio ratio uniform mixing of soda ash, fusion in High Temperature Furnaces Heating Apparatus, and the control glass melting temperature is 950 ℃ and kept 30 minutes, obtains sodium silicate solid.Add distilled water after the sodium silicate solid that makes slowly cooled to room temperature, be heated to 100 ℃ of dissolvings down, filter and obtain the primary water glass solution that concentration is 0.2mol/L.NaOH solution with 1.0mol/L washs into the pH value to anionite-exchange resin 11.5, with the hydrochloric acid of 1.0mol/L Zeo-karb is washed into the pH value 1.5.It is long slowly to pour the primary water glass solution into handle 20cm, makes the pH value of solution value 11 in the anion-exchange column of diameter 2cm, and it is long that the solution that obtains is slowly poured the 20cm that handles again into, makes the pH value of solution value 4.5 in the cationic exchange coloum of diameter 2cm.The water glass solution that then obtains is poured in the insulating brick mould and added the mullite fiber massfraction is 20%, stirs 15 minutes, makes fiber dispersion even, leaves standstill to wait for its gel.The gel block that obtains taken out in the dehydrated alcohol that is placed on 70 ℃ soaked 72 hours.Take out back 50 ℃ of oven dry.The block that obtains put into process furnace be rapidly heated to 600 ℃ of insulations until obtaining white block, obtain high-performance light-weight insulating brick after manually renovating.
Embodiment 2
With quartz mine is basic raw material, through being packed into framework material after the reaction, adopts the moulding of so-gel technology to prepare high-performance light-weight insulating brick.Its technological process is: natural high grade quartz ore is pulverized, got a certain amount of quartz mine stone and carry out jaw and break into ball milling behind the fritter, the quartzite powder that obtains is crossed 200 mesh sieves, stay and sieved part.To the hydrochloric acid that wherein adds 1.2mol/L, make quartz powder soak the end fully in acid, stirred 4 hours.Add distilled water wash, be washed till and use AgNO
3Detection does not have chlorion, after the filtration it is dried back and 1: 1.3 in molar ratio ratio uniform mixing of soda ash, fusion in High Temperature Furnaces Heating Apparatus, and the control glass melting temperature is 960 ℃ and kept 30 minutes, obtains sodium silicate solid.Add distilled water after the sodium silicate solid that makes slowly cooled to room temperature, be heated to 95 ℃ of dissolvings down, filter and obtain the primary water glass solution that concentration is 0.15mol/L.NaOH solution with 0.7mol/L washs into the pH value to anionite-exchange resin 11, with the hydrochloric acid of 0.7mol/L Zeo-karb is washed into the pH value 2.5.It is long slowly to pour the primary water glass solution into handle 20cm, makes the pH value of solution value 10.5 in the anion-exchange column of diameter 2cm, and it is long that the solution that obtains is slowly poured the 20cm that handles again into, makes the pH value of solution value 5.5 in the cationic exchange coloum of diameter 2cm.The water glass solution that then obtains is poured in the insulating brick mould and added the mullite fiber massfraction is 30%, stirs 15 minutes, makes fiber dispersion even, leaves standstill to wait for its gel.The gel block that obtains taken out in the dehydrated alcohol that is placed on 70 ℃ soaked 72 hours.Take out back 60 ℃ of oven dry.The block that obtains put into process furnace be rapidly heated to 600 ℃ of insulations until obtaining white block, obtain high-performance light-weight insulating brick after manually renovating.
The product that the foregoing description 1 and 2 makes, its thermal conductivity at room temperature are 0.05～0.06W/mK, and density is 500～600Kg/m
3Can manual machine-shaping.
But this product life-time service is in temperature is no more than 1000 ℃ industrial furnace, and heat insulation effect is very excellent.Also can be used in other and need place heat insulation, insulation.
Claims (2)
1. method for preparing high-performance light-weight insulating brick with quartz mine, with the natural quartz ore is basic raw material, it is pulverized the back generate silicon salt with the soda ash reaction, and be packed into framework material, and adopt sol-gel method to make basicity reduction in the silicon salt, thus the polyreaction of bringing out silicate, the poly-attitude silicate ion particle diameter of the height that colloidal particle form in the system is existed constantly increases, form silicon sol, along with the further reduction of system pH, SiO
2The micelle cohesion forms the silicon gel.
2. as claimed in claim 1ly a kind ofly prepare the method for high-performance light-weight insulating brick with quartz mine, it is realized by following concrete processing step:
(1) the natural quartz ore is pulverized, the quartz mine stone is carried out jaw break into ball milling behind the fritter, the quartzite powder that obtains is crossed 200 mesh sieves, stay and sieved part;
(2) quartz powder of (1) set by step preparation is carried out removal of impurities and handles after, get quartz powder, add the hydrochloric acid of 0.7-1.2mol/L, make quartz powder soak the end fully in acid, stirred 4-5 hour, the adding distilled water wash is washed till and uses AgNO
3Detection does not have chlorion, after the filtration with its oven dry;
(3) to the quartz powder raw material of (2) set by step preparation and soda ash in molar ratio 1: the ratio uniform mixing of 1.3-1.5, fusion in High Temperature Furnaces Heating Apparatus, the control glass melting temperature is 940-960 ℃ of maintenance 30 minutes, obtains sodium silicate solid;
(4) will be set by step (3) sodium silicate solid of making add distilled water after slowly cooling to room temperature, be heated to 90-100 ℃ of dissolving down, filter and obtain the settled solution that concentration is 0.1-0.2mol/L;
(5) the NaOH solution with 0.5-1.0mol/L washs into the pH value to anionite-exchange resin in the 11-11.5 scope, with the hydrochloric acid of 0.7-1.2mol/L Zeo-karb is washed into the pH value in the 1.5-2.5 scope;
(6) water glass solution that step (4) is obtained is slowly poured the 20cm length that step (5) is handled into, make the pH value of solution value in the 10.5-11 scope in the anion-exchange column of diameter 2cm, the solution that obtains is slowly poured the 20cm length that step (5) is handled again into, makes the pH value of solution value in the 4.5-5.5 scope in the cationic exchange coloum of diameter 2cm;
(7) to pour in the insulating brick mould and add the mullite fiber massfraction be 20-35% to the water glass solution that obtains to step (6), stirred 10-15 minute, makes fiber dispersion even, leaves standstill to wait for its gel;
(8) the gel block that step (7) is obtained takes out in the dehydrated alcohol that is placed on 70 ℃ and soaked 72 hours, takes out the 50-70 ℃ of oven dry in back;
(9) block that step (8) is obtained put into process furnace be rapidly heated to 600 ℃ of insulations until obtaining white block, obtain high-performance light-weight insulating brick after manually renovating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810229128XA CN101746980B (en) | 2008-11-28 | 2008-11-28 | Method for preparing high-performance light-weight insulating brick by using quartz mine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810229128XA CN101746980B (en) | 2008-11-28 | 2008-11-28 | Method for preparing high-performance light-weight insulating brick by using quartz mine |
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| Publication Number | Publication Date |
|---|---|
| CN101746980A true CN101746980A (en) | 2010-06-23 |
| CN101746980B CN101746980B (en) | 2012-01-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092735A (en) * | 2011-03-11 | 2011-06-15 | 福建省三明汇丰化工有限公司 | Purification method of sodium silicate |
| CN114671441A (en) * | 2022-04-21 | 2022-06-28 | 湖北拓材再生资源有限公司 | Method for producing water glass at normal pressure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524817A (en) * | 2003-02-26 | 2004-09-01 | 曾广海 | Manufacturing method of jade-imitating artificial stone |
| CN1259491C (en) * | 2004-09-27 | 2006-06-14 | 柳州三幸商贸有限责任公司 | Method and equipment for producing art veins cleavage tile |
| RU2333898C2 (en) * | 2006-07-06 | 2008-09-20 | Государственное образовательное учреждение высшего профессионального образования "Самарский государственный архитектурно-строительный университет" (СГАСУ) | Ceramic mass for brick production |
-
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- 2008-11-28 CN CN200810229128XA patent/CN101746980B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092735A (en) * | 2011-03-11 | 2011-06-15 | 福建省三明汇丰化工有限公司 | Purification method of sodium silicate |
| CN102092735B (en) * | 2011-03-11 | 2013-01-16 | 福建海能新材料有限公司 | Purification method of sodium silicate |
| CN114671441A (en) * | 2022-04-21 | 2022-06-28 | 湖北拓材再生资源有限公司 | Method for producing water glass at normal pressure |
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| Publication number | Publication date |
|---|---|
| CN101746980B (en) | 2012-01-25 |
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