CN109694234A - The method for preparing water-permeable brick using waterworks sludge - Google Patents
The method for preparing water-permeable brick using waterworks sludge Download PDFInfo
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- CN109694234A CN109694234A CN201910143325.8A CN201910143325A CN109694234A CN 109694234 A CN109694234 A CN 109694234A CN 201910143325 A CN201910143325 A CN 201910143325A CN 109694234 A CN109694234 A CN 109694234A
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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
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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
- C04B33/16—Lean materials, e.g. grog, quartz
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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
- C04B33/24—Manufacture of porcelain or white ware
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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
- C04B33/32—Burning methods
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/0665—Waste material; Refuse other than vegetable refuse
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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
- 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
- C04B2235/6562—Heating rate
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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
- 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
- C04B2235/6567—Treatment time
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- 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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- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
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- Environmental & Geological Engineering (AREA)
- Treatment Of Sludge (AREA)
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Abstract
The invention discloses a kind of methods for preparing water-permeable brick using waterworks sludge, which comprises the quartz sand that mass ratio is 10-30% is added in waterworks sludge, obtains the first ingredient；The water that mass ratio is 15-25% is added in first ingredient, obtains the second ingredient；Second ingredient is put into brick-making mould, the compression moulding under 25-30Mpa pressure, obtains the first adobe；One layer of oxygen barrier substance of package is sprayed in the first adobe outer layer, it is first adobe that internal layer, which is made, and outer layer is the second adobe of oxygen barrier substance；Second adobe is dried, second adobe moisture content after making drying is controlled in 3-6%；Since the first temperature, second adobe after drying is warming up to 1000-1100 DEG C with scheduled rate and keeps the temperature 1-3h, be cooled to second temperature, obtains water-permeable brick.The method proposed by the present invention for preparing water-permeable brick makes the water-permeable brick fired have good adsorption characteristic, also improves water-permeable brick intensity using oxygen barrier substance is wrapped up outside waterworks sludge.
Description
Technical field
The present invention relates to water-permeable brick preparation technical field more particularly to a kind of sides that water-permeable brick is prepared using waterworks sludge
Method.
Background technique
Waterworks sludge is the sludge by-product in the production process of waterworks, for the conventional process side of waterworks sludge
Method is usually directly filled or is directly discharged into city planting ductwork, and this traditional processing method can be to environment and the ecosystem
It damages, does not meet the theory of Sustainable Development of Ecological Environment.With the increase and tightened up drinking water standard of population, produce
The amount of raw waterworks sludge can be increasing, when environment and economic pressures limitation disposition option (i.e. landfill, draining and under
Water channel discharge) when, it finds suitable waterworks sludge and scheme is recycled to become particularly important.
Containing coagulant such as the aluminium salts and molysite added in water purification process in waterworks sludge, while the suspension in raw water is miscellaneous
Matter, colloid substance and natural organic matter are also retained in waterworks sludge from removing in raw water, due to waterworks sludge
In containing the elements such as iron and aluminium, while there is flourishing pore structure, therefore waterworks sludge is to anion such as phosphorus in water body
Pollutant has good adsorption effect.It is shapeless but since waterworks sludge intensity is low, exist during resource utilization
It is many inconvenient.Make building materials using waterworks sludge in the prior art, typically by waterworks sludge and other raw materials into
Row mixing, is then fired in kiln, temperature is essentially 1000 degrees centigrades in sintering procedure.Due to by high temperature
It fires, the amorphous state aluminium and iron in waterworks sludge are converted into crystal habit, while the pore structure of sludge is destroyed, funeral
The adsorption capacity to pollutants such as phosphorus is lost.
Summary of the invention
The present invention provides a kind of method for preparing water-permeable brick using waterworks sludge.
Specifically, the method for preparing water-permeable brick using waterworks sludge, comprising:
The quartz sand that mass ratio is 10-30% is added in waterworks sludge, obtains the first ingredient；
The water that mass ratio is 15-25% is added in first ingredient, obtains the second ingredient；
Second ingredient is put into brick-making mould, the compression moulding under 25-30Mpa pressure, obtains the first adobe；
One layer of oxygen barrier substance of package is sprayed in the first adobe outer layer, it is first adobe that internal layer, which is made, and outer layer is
Second adobe of oxygen barrier substance；
Second adobe is dried, second adobe moisture content after making drying is controlled in 3-6%；
Since the first temperature, second adobe after drying is warming up to 1000-1100 DEG C with scheduled rate and is protected
Warm 1-3h is cooled to second temperature, obtains water-permeable brick.
Optionally, mass ratio is added in first ingredient for the water of 15-25%, after the second ingredient of acquisition, comprising:
It is stored 24-48 hours under the conditions of second ingredient is placed on 20-30 DEG C, so that moisture is in second ingredient
It is evenly distributed.
Optionally, since the first temperature, second adobe after drying is warming up to 1000-1100 with scheduled rate
DEG C and keep the temperature 1-3h, be cooled to second temperature, obtain water-permeable brick, comprising:
First -180 DEG C of temperature is heated up with the rate of 2 DEG C/min, wherein first temperature is lower than 180 DEG C；
It 180-450 DEG C, is heated up with the rate of 1 DEG C/min, and in 450 DEG C of heat preservation 2h；
It 450-600 DEG C, is heated up with the rate of 0.5 DEG C/min, and in 600 DEG C of heat preservation 2h；
It 600-1000 DEG C, is heated up with the rate of 3 DEG C/min；
And in 1000-1100 DEG C of heat preservation 1-3h；
It is cooled to second temperature, obtains water-permeable brick, wherein the second temperature is lower than 1000 DEG C.
Optionally, the quartz sand that mass ratio is 10-30%, before obtaining the first ingredient, packet are added in waterworks sludge
It includes:
Dry waterworks sludge；
Waterworks sludge after drying is ground into screening, obtains the waterworks sludge of the first predetermined size.
Optionally, the oxygen barrier substance is clay.
Optionally, described to spray one layer of oxygen barrier substance of package in the first adobe outer layer, it is described first that internal layer, which is made,
Adobe, before outer layer is the second adobe of oxygen barrier substance, further includes:
Crush the clay for being derived from building site；
Smashed clay is sieved by screening media, using the clay of the second predetermined size as oxygen barrier substance.
Optionally, be wrapped in the outer layer clay of first adobe with a thickness of 5-10mm.
Optionally, the mode second adobe being dried is natural drying and/or artificial drying.
Optionally, artificial drying, which refers to for second adobe to be put into 105-110 DEG C of freeze-day with constant temperature room, dries 8-12h.
Optionally, the partial size of quartz sand is 1.0-2.0mm.
The disclosure obtains the first ingredient by the way that the quartz sand that mass ratio is 10-30% is added in waterworks sludge；Institute
State water the second ingredient of acquisition for being added that mass ratio is 15-25% in the first ingredient；Second ingredient is put into brick-making mould,
The compression moulding under 25-30Mpa pressure obtains the first adobe；One layer of oxygen barrier substance of package is sprayed in the first adobe outer layer,
It is first adobe that internal layer, which is made, and outer layer is the second adobe of oxygen barrier substance；Second adobe is dried, drying is made
Second adobe moisture content afterwards is controlled in 3-6%；Since the first temperature, by second adobe after drying with default
Rate is warming up to 1000-1100 DEG C and keeps the temperature 1-3h, is cooled to second temperature, obtains the method and step of water-permeable brick, using giving
The method that oxygen barrier substance is wrapped up outside waterworks sludge, provides the condition of waterworks sludge starvation in sintering procedure, makes
The water-permeable brick of firing retains the good adsorption characteristic of waterworks sludge, can the anionic pollutants such as Phosphate Sorption, and play raising
The effect of water-permeable brick intensity.This has simple process and low cost using the method that waterworks sludge prepares water-permeable brick, can operate
The strong advantage of property, while may be implemented to economize on resources, the technical effect of refuse reclamation.
Detailed description of the invention
Fig. 1 shows the method flow diagram that water-permeable brick is prepared using waterworks sludge according to one embodiment of the disclosure.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
It is existing that using the method for waterworks sludge firing building material or filtrate, sludge is exposed to aerobic ring in sintering procedure
In border, make sludge structure and chemical form in firing product that the variation for being unfavorable for pollutant absorption have occurred, so from function is used
Can on lose the ability of purifying contaminated object.Organic matter completely burned in waterworks sludge simultaneously, generates carbon dioxide, to ring
Border affects.Therefore, it how using waterworks sludge firing water-permeable brick, can guarantee the water-permeable brick fired both by force
Degree, but the good adsorption characteristic that can retain waterworks sludge is one of current urgent problem to be solved.
Fig. 1 shows the method flow diagram that water-permeable brick is prepared using waterworks sludge according to one embodiment of the disclosure, such as
Shown in Fig. 1, the method for preparing water-permeable brick using waterworks sludge includes the following steps S101-S104:
In step s101, the quartz sand that mass ratio is 10-30% is added in waterworks sludge, obtains the first ingredient；
In the present embodiment, it is that quartz sand is added in 10-30% according to mass ratio, refers to that quartz sand quality accounts for waterworks sludge
With the percentage of quartz sand gross mass.It is the water penetration in order to improve water-permeable brick that quartz sand, which is added, if entirely sludge, permeable
Property it is too small, quartz sand, which is added, can guarantee the water permeability of water-permeable brick, can meet when quartz sand mass ratio is 10-30%
The requirement of water.It after quartz sand is added in waterworks sludge, is uniformly mixed, obtains the first ingredient.
In step s 102, the water that mass ratio is 15-25% is added in first ingredient, obtains the second ingredient；
In the present embodiment, it is that water is added in 15-25% according to mass ratio, refers to that the quality of water accounts for the first ingredient and the total matter of water
The percentage of amount.In the first ingredient plus water is the soft pug in order to which siccative to be formed with to plasticity, convenient for the base of next step
Molding.It after water is added in the first ingredient, is uniformly mixed, obtains the second ingredient.
In step s 103, second ingredient is put into brick-making mould, the compression moulding under 25-30Mpa pressure obtains
Obtain the first adobe；
In the present embodiment, the second ingredient is put into brick-making mould, pressure is applied to the second ingredient, such as: 25-
30Mpa pressure, to allow the second forming ingredient, it is not easy to scatter, form the first adobe.Wherein, the size of the first adobe with it is general
The size of logical brick is similar, such as can be 240mm × 115mm × 53mm, of course for meeting the needs of practical application, the first brick
The size of base may be set to be other sizes.
Wherein, when suppressing the first adobe, usable pressure testing machine is suppressed, it is possible to use other machines or tool
It is suppressed, the disclosure is not specifically limited operated pressing tool.
In step S104, one layer of oxygen barrier substance of package is sprayed in the first adobe outer layer, it is described that internal layer, which is made,
One adobe, outer layer are the second adobe of oxygen barrier substance；
In one embodiment, the oxygen barrier substance can select starvation or air and can provide the material of some strength
Material, such as clay, shale powder, feldspar powder, zeolite powder material, those skilled in the art can according to the needs of practical application for every
Oxygen species are selected, and the disclosure is not specifically limited the selection of oxygen barrier substance.
Charcoal is product of the biomass under anaerobic after high temperature pyrolysis, with porous structure and particular functional group
Stablize carbon source, has stronger adsorption capacity to most pollutants, make generally as adsorbent, sewage treatment and soil remediation material
With.When firing biomass must starvation can just make the organic matter carbonizing in sludge, generation charcoal, if in sintering procedure
It is contacted with oxygen, organic principle completely burned cannot then form charcoal at inorganic ash content.
In the present embodiment, the waterworks sludge in the second adobe due to the content of element silicon it is few, that individually fires is permeable
Brick intensity is inadequate, and the water-permeable brick intensity that oxygen barrier substance is fired is relatively high, therefore can be by wrapping up outside waterworks sludge
Oxygen barrier substance improves intensity.Meanwhile for starvation and the final intensity for firing water-permeable brick is improved, it can be in the first adobe
Outer layer surface on wrap up one layer of oxygen barrier substance, forming internal layer is the second adobe that the first adobe outer layer is oxygen barrier substance, it is ensured that
Second adobe in sintering procedure can starvation increase its internal pore structure and Bi Biao to generate charcoal
Area makes the water-permeable brick fired that can either retain the good adsorption characteristic of waterworks sludge, additionally it is possible to which the anion such as Phosphate Sorption are dirty
Object is contaminated, while improving the intensity for the water-permeable brick finally fired again.
In step s105, second adobe is dried, second adobe moisture content control after making drying
In 3-6%；
In the present embodiment, the second adobe is dried using default drying mode, the second adobe after making drying contains
Water rate is controlled in 3-6%.Wherein it is possible to the moisture content of the second adobe is judged using weight method, and such as: in 105-110 DEG C of baking oven
It weighs after interior drying 8-12h, of poor quality using drying front and back judges the second adobe moisture content.
Wherein, those skilled in the art can select suitable drying mode according to the needs of practical application, the disclosure for
Specific drying mode is not particularly limited.
In step s 106, since the first temperature, second adobe after drying is warming up to scheduled rate
1000-1100 DEG C and 1-3h is kept the temperature, be cooled to second temperature, obtains water-permeable brick.
In one embodiment of the disclosure, the second adobe after drying is warming up to since the first temperature with scheduled rate
Arbitrary temp in 1000-1100 DEG C needs to exclude absorption water in the second adobe in this stage and constitution water, needs controls liter
Warm rate is to prevent the noncrystal abundant production crystal in the too fast internal structure for destroying the second adobe that heats up, the second adobe of promotion
It also to prevent excessive crystallization simultaneously and charcoal cannot be formed, therefore to get hold of the temperature and rate of heating.Second adobe
After being warming up to arbitrary temp in 1000-1100 DEG C and keeping the temperature 1-3h, it is cooled to second temperature, to be prepared into containing charcoal
The water-permeable brick of phosphorus can be inhaled.Wherein, first temperature can be the same or different with second temperature, the first temperature and second
Temperature can be room temperature, or actual natural temperature.Water-permeable brick is current black and odorous water improvement, sponge urban construction
One of journey common used material, is generally laid on non-automotive vehicle road and river is littoral.
Wherein, those skilled in the art can select to close according to the needs of practical application in 1000-1100 DEG C of temperature range
Suitable final warming temperature selects suitable heat preservation duration in 1-3h time range, and the disclosure is for specific final heating
Temperature and heat preservation duration are not particularly limited.For example, in order to save the cost and improve prepare water-permeable brick efficiency, can choose by
The second adobe after drying is warming up to 1000 DEG C with scheduled rate and keeps the temperature 1h.
The embodiment of the present disclosure is matched by the way that the quartz sand acquisition first that mass ratio is 10-30% is added in waterworks sludge
Material；The water that mass ratio is 15-25% is added in first ingredient and obtains the second ingredient；Second ingredient is put into brickmaking
In mold, the compression moulding under 25-30Mpa pressure obtains the first adobe；The first adobe outer layer spraying package one layer every
Oxygen species, it is first adobe that internal layer, which is made, and outer layer is the second adobe of oxygen barrier substance；Second adobe is done
Dry, second adobe moisture content after making drying is controlled in 3-6%；Since the first temperature, by described second after drying
Adobe is warming up to 1000-1100 DEG C with scheduled rate and keeps the temperature 1-3h, is cooled to second temperature, obtains the method step of water-permeable brick
Suddenly, using the method for wrapping up oxygen barrier substance outside waterworks sludge, waterworks sludge isolating oxygen in sintering procedure is provided
The condition of gas makes the water-permeable brick fired retain the good adsorption characteristic of waterworks sludge, can the anionic pollutants such as Phosphate Sorption,
Play the role of improving water-permeable brick intensity again.This has simple process, cost using the method that waterworks sludge prepares water-permeable brick
It is cheap, the advantages of strong operability, while it may be implemented to economize on resources, the technical effect of refuse reclamation.
In an embodiment of the present invention, it is 15-25%'s that mass ratio is added in step 102, i.e., described first ingredient
Water obtains after the second ingredient, comprising: stores 24-48 hours under the conditions of second ingredient is placed on 20-30 DEG C, so that moisture
It is evenly distributed in second ingredient, convenient for the shaping forming of next step.
In an embodiment of the present invention, the step 106, since the first temperature, by second brick after drying
Base is warming up to 1000-1100 DEG C with scheduled rate and keeps the temperature 1-3h, is cooled to second temperature, obtains water-permeable brick, comprising:
First -180 DEG C of temperature is heated up with the rate of 2 DEG C/min, wherein first temperature is lower than 180 DEG C；
It 180-450 DEG C, is heated up with the rate of 1 DEG C/min, and in 450 DEG C of heat preservation 2h；
It 450-600 DEG C, is heated up with the rate of 0.5 DEG C/min, and in 600 DEG C of heat preservation 2h；
It 600-1000 DEG C, is heated up with the rate of 3 DEG C/min；
And in 1000-1100 DEG C of heat preservation 1-3h；
It is cooled to second temperature, obtains water-permeable brick, wherein the second temperature is lower than 1000 DEG C.
In the present embodiment, -180 DEG C of the first temperature is the low temperature dewatering stage, and really dry continuity, this section are mainly arranged
Except the absorption water and constitution water in the second adobe, can be heated up with the rate of 2 DEG C/min.180-450 DEG C is the medium temperature thermal decomposition stage,
To guarantee absorption water and constitution water removing sufficiently and preventing to drop at this time because of the too fast internal structure for destroying the second adobe body that heats up
Low heating rate, therefore heated up in this temperature section with the rate of 1 DEG C/min, and keep the temperature 2 hours at 450 DEG C.450-600 DEG C is
The amorphous substance process that organic matter carbonizes into amorphous material transformation and waterworks sludge in two adobe bodies, which should be with 0.5
DEG C/heating of the heating rate of min, and 2 hours are kept the temperature at 600 DEG C, in favor of the noncrystal abundant generation to crystal.600-
1000 DEG C are the adobe high temperature sintering stages, and linear contraction, the change of hole and microcellular structure, to prevent can occur for adobe in this section
Inside second adobe waterworks sludge in the case of a high temperature excessive crystallization and charcoal cannot be formed, 600-1000 DEG C of stage with
The faster heating rate heating of 3 DEG C/min.When reaching 1000 DEG C, in 1000 DEG C of heat preservation 1h, it is subsequently cooled to second temperature, thus
It is prepared into the water-permeable brick that can inhale phosphorus containing charcoal.
More specifically, it is assumed that the first temperature and second temperature are 40 DEG C, then the step 106 is implementable are as follows:
It 40-180 DEG C, is heated up with the rate of 2 DEG C/min；
It 180-450 DEG C, is heated up with the rate of 1 DEG C/min, and in 450 DEG C of heat preservation 2h；
It 450-600 DEG C, is heated up with the rate of 0.5 DEG C/min, and in 600 DEG C of heat preservation 2h；
It 600-1000 DEG C, is heated up with the rate of 3 DEG C/min；
And in 1000-1100 DEG C of heat preservation 1-3h；
40 DEG C are cooled to, water-permeable brick is obtained.
In an embodiment of the present invention, in step 101, i.e., it is 10-30%'s that mass ratio is added in waterworks sludge
Quartz sand, obtain the first ingredient before, comprising:
Dry waterworks sludge；
Waterworks sludge after drying is ground into screening, obtains the waterworks sludge of the first predetermined size.
Wherein it is possible to dry waterworks sludge using baking oven, the treatment temperature of baking oven can be according to the needs of practical application
It is selected, for example is 105-110 DEG C.
In the present embodiment, it can use screening media to sieve the waterworks sludge after grinding, wherein water supply plant is dirty
The size of mud pellet diameter and the slot size of screening media are related, and in practical applications, those skilled in the art can be according to actually answering
The characteristics of needs and article processed, selects the waterworks sludge of suitable first predetermined size, for example, working as water supply plant
The first predetermined size of sludge is 0.3mm, can be sieved using the screening media of 50 mesh.
In one embodiment, waterworks sludge can be derived from any large-scale water treatment plant, and water factory's treatment process is using mixed
Retrogradation shallow lake sand filter, sludge from sedimentation tank water and sand filtration water pass through filter press filters pressing reuse, and mud cake is waterworks sludge.It will dehydration
Sludge is fetched from water treatment plant, puts it into 105-110 DEG C of drying in oven.Then the waterworks sludge after drying is ground,
The screening of 50 mesh screening media is crossed, obtaining partial size is 0.3mm waterworks sludge powder.
In an embodiment of the present invention, the oxygen barrier substance is clay.
In the present embodiment, waterworks sludge due to the content of element silicon it is few, the water-permeable brick intensity individually fired is inadequate, and
The water-permeable brick intensity that clay is fired is relatively high, so wrapping up one layer of clay shape outside the first adobe for including waterworks sludge
At the second adobe, it can improve the water-permeable brick intensity finally fired, and may insure that the second adobe can in sintering procedure
Starvation increases its internal pore structure and specific surface area to generate charcoal, and the water-permeable brick fired is enable to be reserved to
The good adsorption characteristic of waterworks sludge, being capable of the anionic pollutants such as Phosphate Sorption.
It is described to spray one layer of oxygen barrier substance of package in the first adobe outer layer in an embodiment of the present invention, it is made
Internal layer is first adobe, before outer layer is the second adobe of oxygen barrier substance, further includes:
Crush the clay for being derived from building site；
Smashed clay is sieved by screening media, using the clay of the second predetermined size as oxygen barrier substance.
In the present embodiment, it can use screening media (for example, sieve) to sieve smashed clay, wherein
The size of clay partial size after screening is related with the slot size of screening media, and in practical applications, those skilled in the art can
According to the needs of practical application and the characteristics of article processed, selects the clay of suitable second predetermined size as oxygen barrier object
Matter, for example, aperture can be used to be sieved for the sieve of 1.0mm when the second predetermined size of clay is 0.075mm-1.0mm.
In one embodiment, clay can directly be derived from any building site, be crushed first, then use aperture for 1.0mm
Sieve sieved, leave behind fine and closely woven pure soil, partial size is the clay of 0.075mm-1.0mm as oxygen barrier substance.
In an embodiment of the present invention, be wrapped in the outer layer clay of first adobe with a thickness of 5-10mm.Selection
The argillic horizon of 5-10mm is and to guarantee that the water-permeable brick finally prepared has one to guarantee water-permeable brick starvation in sintering procedure
Fixed intensity.
In an embodiment of the present invention, the mode that second adobe is dried is for natural drying and/or manually
It is dry.In the present embodiment, the mode the second adobe being dried can for spontaneously dry or/and artificial drying, wherein from
So dry mode that can be natural air drying,
In an embodiment of the present invention, artificial drying, which refers to, is put into 105-110 DEG C of freeze-day with constant temperature for second adobe
Indoor drying 8-12h.In the present embodiment, artificial drying generally carries out wet base drying in hothouse, in one implementation,
It can be and the stacking of the wet base of the second adobe is entered into hothouse at pile on drying cart be dried, the thermal medium of hothouse is general
Waste heat or hot-blast stove from sintering oven will guarantee that the second adobe body is indeformable in the drying process, not dry and cracked.
In an embodiment of the present invention, the partial size of quartz sand is 1.0-2.0mm.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of method for preparing water-permeable brick using waterworks sludge characterized by comprising
The quartz sand that mass ratio is 10-30% is added in waterworks sludge, obtains the first ingredient；
The water that mass ratio is 15-25% is added in first ingredient, obtains the second ingredient；
Second ingredient is put into brick-making mould, the compression moulding under 25-30Mpa pressure, obtains the first adobe；
One layer of oxygen barrier substance of package is sprayed in the first adobe outer layer, it is first adobe that internal layer, which is made, and outer layer is oxygen barrier
Second adobe of substance；
Second adobe is dried, second adobe moisture content after making drying is controlled in 3-6%；
Since the first temperature, second adobe after drying is warming up to 1000-1100 DEG C with scheduled rate and keeps the temperature 1-
3h is cooled to second temperature, obtains water-permeable brick.
2. the method according to claim 1 for preparing water-permeable brick using waterworks sludge, which is characterized in that described first
It is added in ingredient after water the second ingredient of acquisition that mass ratio is 15-25%, comprising:
It is stored 24-48 hours under the conditions of second ingredient is placed on 20-30 DEG C, so that moisture is distributed in second ingredient
Uniformly.
3. the method according to claim 2 for preparing water-permeable brick using waterworks sludge, which is characterized in that from the first temperature
Start, second adobe after drying is warming up to 1000-1100 DEG C with scheduled rate and keeps the temperature 1-3h, is cooled to the second temperature
Degree obtains water-permeable brick, comprising:
First -180 DEG C of temperature is heated up with the rate of 2 DEG C/min, wherein first temperature is lower than 180 DEG C；
It 180-450 DEG C, is heated up with the rate of 1 DEG C/min, and in 450 DEG C of heat preservation 2h；
It 450-600 DEG C, is heated up with the rate of 0.5 DEG C/min, and in 600 DEG C of heat preservation 2h；
It 600-1000 DEG C, is heated up with the rate of 3 DEG C/min；
And in 1000-1100 DEG C of heat preservation 1-3h；
It is cooled to second temperature, obtains water-permeable brick, wherein the second temperature is lower than 1000 DEG C.
4. the method according to claim 1 for preparing water-permeable brick using waterworks sludge, which is characterized in that in water supply plant dirt
Mass ratio is added in mud for the quartz sand of 10-30%, before the first ingredient of acquisition, comprising:
Dry waterworks sludge；
Waterworks sludge after drying is ground into screening, obtains the waterworks sludge of the first predetermined size.
5. the method according to claim 1 to 4 for preparing water-permeable brick using waterworks sludge, which is characterized in that described
Oxygen barrier substance is clay.
6. the method according to claim 5 for preparing water-permeable brick using waterworks sludge, which is characterized in that described described
First adobe outer layer spraying one layer of oxygen barrier substance of package, it is first adobe that internal layer, which is made, and outer layer is the second of oxygen barrier substance
Before adobe, further includes:
Crush the clay for being derived from building site；
Smashed clay is sieved by screening media, using the clay of the second predetermined size as oxygen barrier substance.
7. the method according to claim 6 for preparing water-permeable brick using waterworks sludge, which is characterized in that be wrapped in described
The outer layer clay of first adobe with a thickness of 5-10mm.
8. the method according to claim 1 for preparing water-permeable brick using waterworks sludge, which is characterized in that by described second
The mode that adobe is dried is natural drying and/or artificial drying.
9. the method according to claim 8 for preparing water-permeable brick using waterworks sludge, which is characterized in that artificial drying is
Second adobe is put into 105-110 DEG C of freeze-day with constant temperature room by finger dries 8-12h.
10. the method according to claim 1 for preparing water-permeable brick using waterworks sludge, which is characterized in that quartz sand
Partial size is 1.0-2.0mm.
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