CN108424117A - A kind of blue bricks and its production method - Google Patents
A kind of blue bricks and its production method Download PDFInfo
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- CN108424117A CN108424117A CN201810318421.7A CN201810318421A CN108424117A CN 108424117 A CN108424117 A CN 108424117A CN 201810318421 A CN201810318421 A CN 201810318421A CN 108424117 A CN108424117 A CN 108424117A
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- blue bricks
- production method
- drying
- municipal sludge
- tail gas
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
- C04B33/1322—Red mud
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention relates to a kind of blue bricks and its production methods, belong to tile product manufacture field.Its production method includes the following steps：Dry municipal sludge, collects the tail gas generated in mud tailings and drying process respectively, and mixing tailings, sand and red mud for alumina plant obtain mixed raw material, then ball milling, press filt, pugging, molding and firing, be passed through tail gas in sintering process, obtain blue bricks.The production method is simple, and condition controllability is good, and final product quality is good.Pass through dry municipal sludge, it collects the pernicious gas of its generation and has combustion air as in blue bricks sintering process, municipal sludge can not only be effectively treated, it is made to turn waste into wealth, also helping simultaneously improves the sintering effect of blue bricks, to obtain quality preferably blue bricks finished product.Thus blue bricks is wear-resistant obtained by producing, and has preferable weathering resistance and water resistance.
Description
Technical field
The present invention relates to tile product manufacture fields, and more particularly to a kind of blue bricks and its production method.
Background technology
The reparations of historical relics such as modern history building all emphasize to want " restoring the old as the old ", and the position especially repaired will be with side not
The position of reparation is consistent, and is unlikely to the feeling of people's a kind of " patch installing ".The exterior wall of some ancient buildings, wall brick is by for many years
The erosion of wind and rain and washing away causes damage very serious.
The reparation and protection of ancient building are due to by factors such as itself historical value of protection building and humanity history environment
Difference, thus when repairing ancient building should restoring the old as the old, i.e., restore the original style for being protected building as much as possible, at present use
Blue bricks is mostly used greatly in the brick of reparation.
Traditional blue bricks is to belong to fired brick, is to be molded by hand, and base brick parches laggard klining system of burying and forms.Ancient blue bricks
Primary raw material is clay, and after clay tempers, extrusion forming reenters brickkiln and bakes, is then water-cooled, and allows iron in clay
Incomplete oxidation.
But sintering effect is bad in current blue bricks manufacturing process, and production cost is higher.
Invention content
One of the objects of the present invention is to provide a kind of production methods of blue bricks, and the production method is simple, condition controllability
Good, final product quality is good.By dry municipal sludge, the pernicious gas of its generation is collected and as helping in blue bricks sintering process
Wind is fired, municipal sludge can not only be effectively treated, it is made to turn waste into wealth, while also helping the sintering effect for improving blue bricks, from
And obtain quality preferably blue bricks finished product.
The second object of the present invention be to provide it is a kind of produced by aforementioned production method obtained by blue bricks, the blue bricks of gained is resistance to
Abrasion, and there is preferable weathering resistance and water resistance.
The present invention solves its technical problem using following technical scheme to realize：
The present invention proposes a kind of production method of blue bricks, includes the following steps：
Dry municipal sludge, collects the tail gas generated in mud tailings and drying process respectively, mixing tailings, sand and
Red mud for alumina plant obtains mixed raw material, then ball milling, press filt, pugging, molding and firing, is passed through tail gas in sintering process, obtains
Blue bricks.
Preferably, the intake of tail gas is 180-200m3/min。
The present invention also proposes a kind of blue bricks, is produced by aforementioned production method and is obtained.
The blue bricks of present pre-ferred embodiments offer and its advantageous effect of production method include：
Present pre-ferred embodiments are collected the pernicious gas of its generation and were burnt into as blue bricks by dry municipal sludge
There is combustion air in journey, municipal sludge can not only be effectively treated, it is made to turn waste into wealth, while also helping the burning for improving blue bricks
At effect, to obtain quality preferably blue bricks finished product.Thus the blue bricks of gained is wear-resistant, and with preferable weathering resistance and resistance to
Aqueous energy.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The blue bricks of the embodiment of the present invention and its production method are specifically described below.
Blue bricks provided in an embodiment of the present invention, production method may comprise steps of：Drying sewage sludge is collected become silted up respectively
The tail gas generated in mud tailings and drying process, mixing tailings, sand and red mud for alumina plant, obtains mixed raw material, then ball
Mill, press filt, pugging, molding and firing are passed through tail gas in sintering process, obtain blue bricks.
The mud used used is municipal sludge in the embodiment of the present invention, and municipal sludge is sewage treatment plant and sewage disposal
Inevitable outcome, refer mainly to the deposit generated in wastewater treatment process, including be mixed into sanitary sewage and industrial wastewater
In the solid particles such as silt, fiber, plant and animal residues and its floccule of condensation, various colloids, organic matter and absorption gold
Belong to the integrated solid materials such as element.After municipal sludge without appropriately handling disposition enters environment, directly to water body and air band
Carry out secondary pollution.
Municipal sludge is as urban waste, and amount is big and utilization rate is low, and currently used processing method is landfill, but is filled
Poisonous and harmful substance contained in municipal sludge can be made to pass through erosion and the further polluted underground water environment of leakage effect of rainwater.
In consideration of it, the embodiment of the present invention can not only be closed using municipal sludge as the utility in blue bricks production process
Reason utilizes municipal sludge, avoids secondary pollution, plays the role of turning waste into wealth, and can also improve blue bricks firing efficiency and effect
Fruit, to obtain quality preferably blue bricks finished product.
Specifically, because municipal sludge water content is up to 99% or more, therefore first it is dried, to reduce its water content.
Optionally, drying can carry out in drying kiln, and the length of drying kiln can be for example 50-60m, and accordingly, dry temperature can
Think 280-320 DEG C, preferably 300 DEG C.It is dry that free moisture is free of as dry terminal with municipal sludge.
Preferably, in the embodiment of the present invention, the drying of municipal sludge includes the first drying stage and the second drying stage.The
One drying stage is the dry 6-8min under conditions of 120-150 DEG C, the second drying stage be by heating rate be 20-30 DEG C/
The temperature of first drying stage is risen to 280-320 DEG C by min, then freeze-day with constant temperature 20-25min.
Above-mentioned first drying stage is mainly used for rapidly removing the free moisture contained by municipal sludge.Due to 100 DEG C of left sides
The evaporation rate of right condition free moisture is slower, also, under conditions of 100 DEG C, pernicious gas contained in municipal sludge
Easy incomplete decomposing generates new pernicious gas.In consideration of it, the temperature of the first drying stage is controlled in the embodiment of the present invention
At 120-150 DEG C, to which the evaporation time of free moisture on the one hand can be shortened, the rate of drying of municipal sludge is improved, it is another
Aspect can avoid generating new pernicious gas.
Second drying stage is mainly used for collecting tail gas caused by municipal sludge, and tail gas is enable effectively to divide with tailings
From.Preferably, the heating rate of the second drying stage is 20-30 DEG C/min, heating terminal is 280-320 DEG C.The heating rate
Comparatively fast, so as to make drying temperature meet the volatilization requirement of a variety of gas with various in a short time, in favor of in the short period
Utmostly collect generated gas in municipal sludge drying process.
It is worth noting why after the second drying stage is warming up to 280-320 DEG C, freeze-day with constant temperature is carried out to it,
Its purpose includes effectively being consolidated the heavy metal contained by municipal sludge.
The tail gas of generation is collected in drying process, after drying, collects mud tailings.Wherein, tailings is used for and sand
And red mud for alumina plant mixes jointly, obtains the mixed raw material for producing blue bricks.
Optionally, above-mentioned tailings, sand and red mud for alumina plant can be for example 0.8-1.2 by weight：67-71：
28-32 is mixed.Preferably, by 1：69：30 ratio mixing.Blue bricks comprehensive performance obtained by being produced under the preferred mixed proportion is more
It is good.
Wherein, red mud for alumina plant includes Fe2O3、Na2O、CaO、MgO、TiO2、SiO2And Al2O3Equal ingredients.
Preferably, the Fe containing 22-24 parts by weight in the red mud for alumina plant of every 100 parts by weight2O3, 5-7 parts by weight
Na2O, the TiO of MgO, 7-8 parts by weight of CaO, 12-14 parts by weight of 18-22 parts by weight2, 10-14 parts by weight SiO2And 6-
The Al of 7 parts by weight2O3, surplus is loss on ignition.
Preferably, before mixing, sand can be crushed to no more than 1 centimeter with the crushing plant of such as crusher class, make its grain
The granularity of degree and solid in red mud for alumina plant and municipal sludge tailings is close, to improve the uniformity coefficient of mixed raw material, makes
Finished product blue bricks has preferable institutional framework.
After mixing, mixed raw material is subjected to ball milling.Ball milling can for example carry out in the ball mill that pressure is 60 tons, ball milling
Time can for example control in 8-10h.
Further, the material after ball milling is carried out to press filt processing in slip drying press.Ground is can refer to, press filt can be in
It is carried out in the high pressure mud press of TC800 types.The pressure of press filt can be 2.4-2.6MPa, and the material moisture after press filt is not
More than 18wt%.Preferably, the yield of press filt is 2-2.4 tons/time, such as 2.2 tons/time.
Further, the material after press filt is carried out to pugging processing in pug mill.Ground is can refer to, pugging can be in vacuum
It is carried out in pug mill (such as TC250-1 types single axle vacuum pug mill).It is true to be referred to SS80 for vacuum pump used in pugging process
Sky pump, rate of air sucked in required for example can be 75-85m3/ h, vacuum degree can be -0.098 to -0.099MPa.Preferably, vacuum is practiced
The a diameter of 250-300mm of output of mud machine, yield are 3-4 tons/h.
Further, by the material after pugging in extruder extrusion forming.Optionally, molding can be 75- in pressure
It is carried out under conditions of 85 tons (such as 80 tons), yield is preferably controlled to 6-10 times/min (such as 8 times/min).
Further, material after molding is burnt into.Ground is can refer to, being burnt into the embodiment of the present invention for example can be in
It is carried out in the tunnel oven of 150-180m, firing condition for example can handle 20-26h (such as under conditions of 1050-1080 DEG C
24h)。
It is worth noting that firing is divided into three phases in the embodiment of the present invention, first, entering the kiln stage, second is that drying rank
Section, third, obtaining the finished product stage.Drying stage of the tail gas in sintering process is passed through collected by dry municipal sludge.In this rank
Section is passed through tail gas, on the one hand can make tail gas and fuel (such as coal gas or natural gas) co-fire, another aspect tail gas can also conduct
Combustion air improves the combustion rate of fuel in drying course, to improve the sintering effect of blue bricks.
In addition, by the way that the tail gas of collection to be passed through in sintering process in tunnel oven, can make to be released in mud drying process
The toxic gas (such as more chloro dibenzodioxin English) put is recycled, and becomes innocuous gas, such as titanium dioxide under the high temperature conditions
Carbon etc..
Preferably, the intake of tail gas can be 180-200m3The length and fuel quantity of/min, the intake and tunnel oven
It matches, not only allows the fuel to fully be burnt, but also be passed through tail gas is enough made to be effectively used, Ye Ji
It is burnt under high temperature action, the tail gas being passed through is made contained toxic gas to be decomposed into innocuous gas.
Blue bricks intensity obtained by being produced by aforementioned production method is higher, wear-resistant, and with preferable weathering resistance and water-fast
Performance.
The feature and performance of the present invention are described in further detail with reference to embodiments.
Embodiment 1
8min is dried to municipal sludge in the drying kiln that length is 50m, drying temperature is 120 DEG C, then presses heating speed
Rate is that drying temperature is risen to 280 DEG C by 20 DEG C/min, then freeze-day with constant temperature 25min.
The tail gas of generation is collected in drying process, after drying, collects mud tailings.
It is 0.8 by weight by mud tailings and with the sand and red mud for alumina plant of crusher in crushing to 1 centimeter：67：
28 mixing, obtain mixed raw material.Wherein, the Fe containing 22 parts by weight in every above-mentioned red mud for alumina plant of 100 parts by weight2O3, 5 weight
The Na of part2O, the TiO of the CaO of 18 parts by weight, the MgO of 12 parts by weight, 7 parts by weight2, 10 parts by weight SiO2And 6 parts by weight
Al2O3, surplus is loss on ignition.
To mixed raw material ball milling 10h in the ball mill that pressure is 60 tons.
Then after the condition that be 2.4MPa with pressure in the high pressure mud press of TC800 types, yield is 2 tons/time is to ball milling
Material carry out press filt until press filt after material moisture be less than 18wt%.
In the TC250-1 type single axle vacuum puggings containing SS80 vacuum pumps for exporting a diameter of 250mm, yield is 3 tons/h
In machine, the rate of air sucked in required with vacuum pump is 75m3/ h and the condition that vacuum degree is -0.098MPa practice the material after press filt
Mud.
Then the material after pugging is squeezed under conditions of be 75 tons with pressure in extruder, yield is 6 times/min
It is molded.
Then, the material after extrusion forming is passed through in the tunnel oven of 150m, is burnt into 26h under conditions of 1050 DEG C, obtains
To blue bricks.It is 180m by intake in drying stage in sintering process3/ min, which is passed through, to be collected in municipal sludge drying process
Tail gas.
Embodiment 2
6min is dried to municipal sludge in the drying kiln that length is 60m, drying temperature is 150 DEG C, then presses heating speed
Rate is that drying temperature is risen to 320 DEG C by 30 DEG C/min, then freeze-day with constant temperature 20min.
The tail gas of generation is collected in drying process, after drying, collects mud tailings.
It is 1.2 by weight by mud tailings and with the sand and red mud for alumina plant of crusher in crushing to 0.8 centimeter：
71：32 mixing, obtain mixed raw material.Wherein, the Fe containing 24 parts by weight in the above-mentioned discarded porcelain mud of every 100 parts by weight2O3, 7 parts by weight
Na2O, the TiO of the CaO of 22 parts by weight, the MgO of 14 parts by weight, 8 parts by weight2, 14 parts by weight SiO2And 7 parts by weight
Al2O3, surplus is loss on ignition.
To mixed raw material ball milling 8h in the ball mill that pressure is 60 tons.
Then the condition that be 2.6MPa with pressure in the high pressure mud press of TC800 types, yield is 2.4 tons/time is to ball milling
Material afterwards carries out press filt until the material moisture after press filt is less than 16wt%.
In the TC250-1 type single axle vacuum puggings containing SS80 vacuum pumps for exporting a diameter of 300mm, yield is 4 tons/h
In machine, the rate of air sucked in required with vacuum pump is 85m3/ h and the condition that vacuum degree is -0.099MPa practice the material after press filt
Mud.
Then the material after pugging is squeezed under conditions of be 85 tons with pressure in extruder, yield is 10 times/min
It is molded.
Then, the material after extrusion forming is passed through in the tunnel oven of 180m, is burnt into 20h under conditions of 1080 DEG C, obtains
To blue bricks.It is 200m by intake in drying stage in sintering process3/ min, which is passed through, to be collected in municipal sludge drying process
Tail gas.
Embodiment 3
7min is dried to municipal sludge in the drying kiln that length is 65m, drying temperature is 125 DEG C, then presses heating speed
Rate is that drying temperature is risen to 300 DEG C by 25 DEG C/min, then freeze-day with constant temperature 22.5min.
The tail gas of generation is collected in drying process, after drying, collects mud tailings.
It is 1 by weight by mud tailings and with the sand and red mud for alumina plant of crusher in crushing to 0.5 centimeter：69：
30 mixing, obtain mixed raw material.Wherein, the Fe containing 23 parts by weight in the above-mentioned discarded porcelain mud of every 100 parts by weight2O3, 6 parts by weight
Na2O, the TiO of the CaO of 20 parts by weight, the MgO of 13 parts by weight, 7.5 parts by weight2, 12 parts by weight SiO2And 6.5 parts by weight
Al2O3, surplus is loss on ignition.
To mixed raw material ball milling 9h in the ball mill that pressure is 60 tons.
Then the condition that be 2.5MPa with pressure in the high pressure mud press of TC800 types, yield is 2.2 tons/time is to ball milling
Material afterwards carries out press filt until the material moisture after press filt is less than 15wt%.
Practice in the TC250-1 type single axle vacuums containing SS80 vacuum pumps for exporting a diameter of 275mm, yield is 3.5 tons/h
In mud machine, the rate of air sucked in required with vacuum pump is 80m3/ h and the condition that vacuum degree is -0.099MPa carry out the material after press filt
Pugging.
Then the material after pugging is squeezed under conditions of be 80 tons with pressure in extruder, yield is 8 times/min
It is molded.
Then, the material after extrusion forming is passed through in the tunnel oven of 165m, is burnt into for 24 hours, obtains under conditions of 1065 DEG C
To blue bricks.It is 190m by intake in drying stage in sintering process3/ min, which is passed through, to be collected in municipal sludge drying process
Tail gas.
Embodiment 4
8min is dried to municipal sludge in the drying kiln that length is 60m, drying temperature is 150 DEG C, then presses heating speed
Rate is that drying temperature is risen to 320 DEG C by 30 DEG C/min, then freeze-day with constant temperature 25min.
The tail gas of generation is collected in drying process, after drying, collects mud tailings.
It is 1 by weight by mud tailings and with the sand and red mud for alumina plant of crusher in crushing to 1 centimeter：69：30
Mixing, obtains mixed raw material.Wherein, the Fe containing 23 parts by weight in the above-mentioned discarded porcelain mud of every 100 parts by weight2O3, 6 parts by weight
Na2O, the TiO of the CaO of 20 parts by weight, the MgO of 13 parts by weight, 7.5 parts by weight2, 12 parts by weight SiO2And 6.5 parts by weight
Al2O3, surplus is loss on ignition.
To mixed raw material ball milling 10h in the ball mill that pressure is 60 tons.
Then the condition that be 2.5MPa with pressure in the high pressure mud press of TC800 types, yield is 2.2 tons/time is to ball milling
Material afterwards carries out press filt until the material moisture after press filt is less than 18wt%.
In the TC250-1 type single axle vacuum puggings containing SS80 vacuum pumps for exporting a diameter of 250mm, yield is 4 tons/h
In machine, the rate of air sucked in required with vacuum pump is 80m3/ h and the condition that vacuum degree is -0.099MPa practice the material after press filt
Mud.
Then the material after pugging is squeezed under conditions of be 80 tons with pressure in extruder, yield is 8 times/min
It is molded.
Then, the material after extrusion forming is passed through in the tunnel oven of 150m, is burnt into for 24 hours, obtains under conditions of 1080 DEG C
To blue bricks.It is 200m by intake in drying stage in sintering process3/ min, which is passed through, to be collected in municipal sludge drying process
Tail gas.
Test example 1
It repeats to implement above-described embodiment 1-4, obtains enough blue bricks finished products.It is examination with the blue bricks obtained by embodiment 1-4
A group 1-4 is tested, using conventional blue bricks as control group.According to《GB/T T21149-2007》In test method to test group and control
The blue bricks of group carries out water absorption rate, bending resistance and weatherability test, same sample and tests 5 times and be averaged,
The results are shown in Table 1.Wherein, resistance to weathering can refer to the blueness under -15 to -20 DEG C of freezing conditions after 15 Frozen-thawed cycleds
The breakoff phenomenons such as whether brick cracking, layering, losing fangle and peeling, are not occurred, are indicated with "No" in table 1, then table occur
It is indicated with "Yes" in 1.
1 test result of table
As can be seen from Table 1, the blue bricks obtained by test group 1-4 meets《GB/T T21149-2007》The standard of middle blue bricks is wanted
It asks, and more excellent compared with the blue bricks performance of control group in terms of flexural strength and water absorption rate, illustrates provided in an embodiment of the present invention
Method for producing blue bricks is effective and feasible, can produce the preferable blue bricks of performance.
Comparative experimental example 1-4 can be seen that flexural strength of the test example 4 compared with the blue bricks obtained by test example 1-3 and water suction
Rate is more excellent, illustrates the manufacturing parameter of test example 4 more preferably.
Test example 2
With reference to the production method and condition of test group 4, test group 5-9 is set, between test group 5-9 difference lies in：Examination
The weight ratio of tailings, sand and red mud for alumina plant in group 5-7 is tested in 0.8-1.2：67-71：Within the scope of 28-32, in test group 8
The weight ratio of tailings, sand and red mud for alumina plant is 0.5：60：39.5, tailings, sand and red mud for alumina plant in test group 9
Weight ratio be 2：75：23.Compare water absorption rate, bending resistance and the weatherability of blue bricks obtained respectively.
Itself the results show that blue bricks obtained by test group 5-7 compared with the water absorption rate of the blue bricks of 9 gained of test group 8 and test group,
Bending resistance and weatherability are more excellent, and the blue bricks color of test group 5-7 is more equal compared with the blue bricks of test group 8-9
It is even.Thus illustrate in production method provided in an embodiment of the present invention, mud tailings, sand and red mud for alumina plant weight ratio
There is certain influence to the quality of blue bricks and color and luster.
In conclusion the production method of blue bricks provided by the invention is simple, condition controllability is good, and final product quality is good.Pass through
Dry municipal sludge collects the pernicious gas of its generation and has combustion air as in blue bricks sintering process, can not only be effective
Municipal sludge is handled, it is made to turn waste into wealth, while also helping the sintering effect for improving blue bricks, it is preferably green to obtain quality
Brick finished product.Thus the blue bricks of gained is wear-resistant, and has preferable weathering resistance and water resistance.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.The reality of the present invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of production method of blue bricks, which is characterized in that include the following steps：Dry municipal sludge, collects mud tail respectively
The tail gas generated in slag and drying process mixes the tailings, sand and red mud for alumina plant, obtains mixed raw material, then ball
Mill, press filt, pugging, molding and firing are passed through the tail gas in sintering process, obtain blue bricks；
Preferably, the intake of the tail gas is 180-200m3/min。
2. production method according to claim 1, which is characterized in that the municipal sludge is under conditions of 280-320 DEG C
It is dry.
3. production method according to claim 2, which is characterized in that drying includes the first drying stage and the second drying rank
Section, first drying stage are the dry 6-8min under conditions of 120-150 DEG C, and second drying stage is by heating speed
Rate is that the temperature of first drying stage is risen to 280-320 DEG C by 20-30 DEG C/min, then freeze-day with constant temperature 20-25min.
4. production method according to claim 1, which is characterized in that the tailings, the sand and the alumina producer
Red mud is 0.8-1.2 by weight：67-71：28-32 is mixed.
5. production method according to claim 1, which is characterized in that Ball-milling Time 8-10h.
6. production method according to claim 1, which is characterized in that press filt is under conditions of pressure is 2.4-2.6MPa
It carries out.
7. production method according to claim 1, which is characterized in that pugging condition includes：Vacuum degree be -0.098 to -
The rate of air sucked in required of 0.099MPa and/or vacuum pump is 75-85m3/h。
8. production method according to claim 1, which is characterized in that molding be pressure be 75-85 tons under conditions of into
Row.
9. production method according to claim 1, which is characterized in that firing is handled under conditions of 1050-1080 DEG C
20-26h。
10. a kind of blue bricks, which is characterized in that the blue bricks is produced by the production method as described in claim 1-9 and obtained.
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| CN112010643A (en) * | 2020-08-11 | 2020-12-01 | 安徽龙钰徽派古建工艺制品有限公司 | Preparation method of high-strength grey brick for ancient building restoration |
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| CN101269948A (en) * | 2008-05-20 | 2008-09-24 | 贵州省建筑材料科学研究设计院 | Red mud baked brick and manufacturing method |
| CN102381877A (en) * | 2011-05-16 | 2012-03-21 | 南京鑫翔新型建筑材料有限责任公司 | Method for brickmaking by comprehensive utilization of desiccated sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101269948A (en) * | 2008-05-20 | 2008-09-24 | 贵州省建筑材料科学研究设计院 | Red mud baked brick and manufacturing method |
| CN102381877A (en) * | 2011-05-16 | 2012-03-21 | 南京鑫翔新型建筑材料有限责任公司 | Method for brickmaking by comprehensive utilization of desiccated sludge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112010643A (en) * | 2020-08-11 | 2020-12-01 | 安徽龙钰徽派古建工艺制品有限公司 | Preparation method of high-strength grey brick for ancient building restoration |
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