CN108821619A - A kind of high-strength phosphogypsum and air-entrained concrete building block Joint Production sewage recovering system and technique - Google Patents
A kind of high-strength phosphogypsum and air-entrained concrete building block Joint Production sewage recovering system and technique Download PDFInfo
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- CN108821619A CN108821619A CN201810594463.3A CN201810594463A CN108821619A CN 108821619 A CN108821619 A CN 108821619A CN 201810594463 A CN201810594463 A CN 201810594463A CN 108821619 A CN108821619 A CN 108821619A
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- ardealite
- drying unit
- building block
- waste water
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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
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
- C04B11/0281—Kettles; Marmites; Autoclaves
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of high-strength phosphogypsums and air-entrained concrete building block Joint Production sewage recovering system and technique.Agitating device is cleaned including ardealite, ardealite cleaning agitating device, ardealite steam pressure device bottom the first cleaning solution recovery channel be connected to waste water circular water treating system, the waste water circular water treating system is also connected to the steam Sewage treatment pipeline of precuring room generation in the second clean and reuse pipeline of cutting motor spindle and air-entrained concrete building block preparation process used in air-entrained concrete building block preparation process.The steam waste water generated during equipment cleaning waste water, precuring after the present invention will be cut in the water for submerging gypsum during ardealite pretreatment water for cleaning, steam pressure in high-strength phosphogypsum preparation process, the cleaning waste water of steam pressure equipment and air-entrained concrete building block preparation process is used for reproduction after carrying out neutralization recycling; become neutral water and no any discharge of wastewater after neutralization reaction, is conducive to the protection of ecological environment.
Description
Technical field
The present invention relates to building material technical fields, and in particular to establishes a kind of high-strength phosphogypsum and air-entrained concrete building block
Joint Production sewage recovering system and technique.
Background technique
Ardealite is mainly the industry byproduct that phosphorous chemical industry enterprise Wet-process phosphoric acid (WPPA) obtains, and 1 ton of phosphoric acid of wet production is big
About discharge 4-5 tons of ardealites.The main component of ardealite is dihydrate gypsum（CaSO4·2H2O）, dihydrate gypsum is in dry air item
Under part, beta-type semi-hydrated gypsum can be formed through calcination processing, this is that building gypsum plaster or plastering are prepared currently with ardealite
Common method.But the semi-hydrated gypsum of this method preparation, crystal is tiny, is in long rodlike or even needle-shaped, normal consistency water requirement
Greatly, low strength limits the application range of product.And dihydrate gypsum is under the conditions of compressed steam, it can after steam pressure is handled
Alpha semi-hydrated gypsum is formed, the addition chemical additives appropriate during steam pressure can prepare coarse half water stone of short cylinder α type
Cream crystal.Such alpha semi-hydrated gypsum has lesser specific surface area and lower water paste ratio, can obtain higher product strength,
Expand the application range of product.A large amount of acid waste water can be generated in the production process of high-strength phosphogypsum.
Currently, the single materials for wall for being able to satisfy self-heat conserving requirement is mainly steam pressurized foam concrete.And high-performance
Autoclave aerated concrete building block is the upgrading products of the common building block of steam-pressing aero-concrete, the more accurate, thermal insulation property with size
More preferable advantage, the mating wall being built into using thin mortar joint dry construction technologies are overcome common building block thickness mortar and built to wall
The adverse effect of body thermal and insulating performance has more excellent thermal and insulating performance, becomes autoclave aerated concrete building block development
Main way.High-performance autoclave aerated concrete building block is produced, it usually need to be using river sand, weathering quartz sand, high-strength phosphogypsum etc.
High-quality siliceous material.A large amount of cleaning waste water, steam waste water can be also generated in air-entrained concrete building block preparation process.Enterprise exists
It needs to spend a large amount of fund in wastewater treatment.
Summary of the invention
Based on this, the present invention provide a kind of high-strength phosphogypsum and air-entrained concrete building block Joint Production sewage recovering system and
Technique.
Technical solution of the present invention is：
A kind of high-strength phosphogypsum and air-entrained concrete building block Joint Production sewage recovering system, including ardealite cleaning stirring dress
It sets, the first cleaning solution recovery channel and waste water recirculated water of the ardealite cleaning agitating device, ardealite steam pressure device bottom
Processing system connection, the waste water circular water treating system also with the cutting machine bottom that is used in air-entrained concrete building block preparation process
The steam Sewage treatment pipeline that precuring room generates in the second clean and reuse pipeline and air-entrained concrete building block preparation process in portion connects
It is logical.
Preferably, the steam pressure equipment is steam pressure vehicle and still kettle.
It is further preferred that the still kettle is to pass through inside horizontal autoclave and the still kettle for steaming maintaining vehicle.
It is further preferred that the steam pressure vehicle vehicle is equipped with the grinding tool for holding ardealite raw material, the grinding tool includes
Bottom plate and the mill frame above bottom plate.
Preferably, the waste water circular water treating system cleans stirring dress using pipe by Sewage treatment with ardealite respectively
It sets, the agitating device connection that air-entrained concrete building block preparation uses.
High-strength phosphogypsum and air-entrained concrete building block Joint Production wastewater recycling process are carried out using the system, it is described
Technique is that ardealite submerges the water of gypsum during pre-processing water for cleaning, steam pressure, steam pressure is set in high-strength phosphogypsum preparation process
The steam generated during equipment cleaning waste water, precuring after being cut in standby cleaning waste water and air-entrained concrete building block preparation process
Waste water is used for reproduction after carrying out neutralization recycling.
Preferably, the preparation process of the high-strength phosphogypsum includes the following steps：
1）Pretreatment：Ardealite is washed repeatedly until its p H value is that then grinding is stand-by for 7.0,40 DEG C of drying；
2）Steam pressure：By the step 1）Pretreated ardealite is configured to the slurry of certain mass score, and tiling is placed in grinding tool,
Slurry thickness control is placed in steaming maintaining vehicle, is pushed into horizontal autoclave in 5 mm, grinding tool layering, and the heating-up time is 2 h, then permanent
Warm constant pressure certain time；
3）It is dry：Material after steam pressure is quickly transferred to drying system and is dried；
4）It crushes：It is spare to cross 0.125 mm sieve sealing for the high strength gypsum crushing and grinding that will finally prepare.
It is further preferred that the step 3）Drying system screw elevator, it is characterised in that：The screw elevator goes out
Material mouth is connected to the feeding inlet of the first drying unit, and the first drying unit discharge port is through screw conveyor, bucket elevator
It is connected to the feeding inlet of the second drying unit, first drying unit is horizontal tank structure, in first drying unit
Portion is equipped with mixing chamber；The first agitating shaft and the second agitating shaft are provided in the mixing chamber；First agitating shaft is by the first electricity
Machine driving, second agitating shaft are equipped with paddle, institute by the second motor driven, first agitating shaft and the second agitating shaft
The direction of motion for stating the first agitating shaft and the second agitating shaft is opposite；
Blower device is equipped on the outside of first drying unit；The blower device is made of blast pipe and air-heater, the heat
Blower is arranged in the middle part of blast pipe；The blast pipe is connected to the hot wind air inlet pipe of the first drying unit, the hot wind air inlet pipe
Including two main lines of air inlet section in the middle part of the first drying unit bottom inflow section and the first drying unit, first drying unit
Several branch's air inlet sections, first drying unit top are connected in the middle part of bottom inflow section, the first drying unit among air inlet section
Portion is equipped with air-exhausting duct, is successively arranged cloth dust collector, exhaust fan on the air-exhausting duct.
It is further preferred that second drying unit be tray drying kettle, the discharge port of second drying unit with
Ardealite crushes system connectivity；The screw elevator entrance is connected to semi-finished product conveyer belt, is set on the semi-finished product conveyer belt
There is semi-finished product elevating hopper.
It is further preferred that the preparation process of the air-entrained concrete building block is 201610755447.9 disclosure of patent.
The technology of the present invention effect is as follows：
1, the present invention will submerge gypsum during ardealite pretreatment water for cleaning, steam pressure in high-strength phosphogypsum preparation process
After being cut in water, the cleaning waste water of steam pressure equipment and air-entrained concrete building block preparation process during equipment cleaning waste water, precuring
The steam waste water of generation is used for reproduction after carrying out neutralization recycling, submerges stone during ardealite pretreatment water for cleaning, steam pressure
The water of cream, steam pressure equipment cleaning waste water be acid water, equipment cleaning waste water after being cut in air-entrained concrete building block preparation process,
The steam waste water generated during precuring is alkaline water, becomes neutral water and no any discharge of wastewater after neutralization reaction, has
Conducive to the protection of ecological environment.
2, the waste water circular water treating system by Sewage treatment using pipe respectively with ardealite clean agitating device,
The agitating device connection that air-entrained concrete building block preparation uses, treated, and neutral water is recycled, and has saved water resource.
3, the drying system being made up of the first drying unit, the second drying unit carries out the semi-finished product of high-strength phosphogypsum
Dry, the first drying unit dries the semi-finished product bulk product after steam pressure, two agitating shaft traffic directions of setting
It is crushed semi-finished product while dry on the contrary, realizing, improves drying efficiency, while also carrying out precomminution processing for later period crushing system,
Energy saving.
4, the hot wind air inlet pipe includes air inlet section in the middle part of the first drying unit bottom inflow section and the first drying unit, divides
Branch air inlet section.The hot wind air inlet uniformly arrangement for guaranteeing the first drying device, improves drying efficiency.
5, still kettle（8）For horizontal autoclave and the still kettle（8）Inside is for steaming maintaining vehicle（81）It passes through, the steam pressure
Vehicle（81）Vehicle is equipped with the grinding tool for holding ardealite raw material（82）, manpower can be saved, operation is facilitated.
Detailed description of the invention
Fig. 1 Sewage treatment structural schematic diagram of the present invention；
Fig. 2 still kettle structural schematic diagram；
Fig. 3 steaming maintaining vehicle structural schematic diagram；
Fig. 4 abrasive article structures schematic diagram；
Fig. 5 drying system schematic diagram；
Fig. 6 the first drying unit external structure schematic diagram；
Mixing chamber structural schematic diagram inside the first drying unit of Fig. 7；
Wherein：Ardealite cleaning agitating device 1, the first cleaning solution recovery channel 2, waste water circular water treating system 3, cutting machine 4,
Second clean and reuse pipeline 5, steam Sewage treatment pipeline 6, steam pressure vehicle 7, still kettle 8, steaming maintaining vehicle 81, grinding tool 82, bottom plate 821,
Frame 822 is ground, agitating device 9, screw elevator 11, the first drying unit 12, mixing chamber 121, the first agitating shaft 122, second stirs
Mix axis 123, first motor 124, the second motor 125, paddle 126, screw conveyor 13, bucket elevator 14, the second drying
Device 15, blower device 16, blast pipe 161, air-heater 162, hot wind air inlet pipe 17, the first drying unit bottom inflow section 171,
Air inlet section 172 in the middle part of first drying unit, branch's air inlet section 173, air-exhausting duct 18, cloth dust collector 181, exhaust fan 182, half at
Product conveyer belt 19, semi-finished product elevating hopper 191.
Specific embodiment
The present invention is further illustrated below with reference to embodiment, but the scope of protection of present invention is not limited to embodiment table
The range stated.
Embodiment 1
A kind of high-strength phosphogypsum and air-entrained concrete building block Joint Production sewage recovering system, including ardealite clean agitating device
1, the first cleaning solution recovery channel 2 and waste water recirculated water of the ardealite cleaning agitating device 1, ardealite steam pressure device bottom
Processing system 3 is connected to, the waste water circular water treating system 3 also with the cutting machine that is used in air-entrained concrete building block preparation process
The steam waste water recovery pipe that precuring room generates in the second clean and reuse pipeline 5 and air-entrained concrete building block preparation process of 4 bottoms
Road 6 is connected to.
Preferably, the steam pressure equipment is steam pressure vehicle 7 and still kettle 8.
It is further preferred that the still kettle 8 is to wear inside horizontal autoclave and the still kettle 8 for steaming maintaining vehicle 81
It crosses.
It is further preferred that 81 vehicle of steam pressure vehicle is equipped with the grinding tool 82 for holding ardealite raw material, the grinding tool
82 include bottom plate 821 and the mill frame 822 above bottom plate 821.
Preferably, the waste water circular water treating system 3 is cleaned with ardealite respectively using pipe by Sewage treatment and is stirred
The agitating device 9 that device 1, air-entrained concrete building block preparation use is connected to.
High-strength phosphogypsum and air-entrained concrete building block Joint Production wastewater recycling process are carried out using the system, it is described
Technique is that ardealite submerges the water of gypsum during pre-processing water for cleaning, steam pressure, steam pressure is set in high-strength phosphogypsum preparation process
The steam generated during equipment cleaning waste water, precuring after being cut in standby cleaning waste water and air-entrained concrete building block preparation process
Waste water is used for reproduction after carrying out neutralization recycling.
Preferably, the preparation process of the high-strength phosphogypsum includes the following steps：
1 pretreatment：Ardealite is washed repeatedly until its p H value is that then grinding is stand-by for 7.0,40 DEG C of drying；
2 steam pressures：The pretreated ardealite of the step 1 is configured to the slurry of certain mass score, tiling is placed in grinding tool, is expected
Thickness control is starched in 5 mm, grinding tool layering is placed in steaming maintaining vehicle, is pushed into horizontal autoclave, and the heating-up time is 2 h, then constant temperature
Constant pressure certain time；
3 is dry：Material after steam pressure is quickly transferred to drying system and is dried；
4 crush：It is spare to cross 0.125 mm sieve sealing for the high strength gypsum crushing and grinding that will finally prepare.
It is further preferred that the step 3）Drying system screw elevator 11, it is characterised in that：The screw elevator
11 discharge ports are connected to the feeding inlet of the first drying unit 12,12 discharge port of the first drying unit through screw conveyor 13,
Bucket elevator 14 is connected to the feeding inlet of the second drying unit 15, and first drying unit 12 is horizontal tank structure, institute
It states and is equipped with mixing chamber 121 inside the first drying unit 12；The first agitating shaft 122 and second is provided in the mixing chamber 121 to stir
Mix axis 123；First agitating shaft 122 is driven by first motor 124, and second agitating shaft 123 is driven by the second motor 125
Dynamic, first agitating shaft 122 and the second agitating shaft 123 are equipped with paddle 126, and first agitating shaft 122 and second stirs
The direction of motion for mixing axis 123 is opposite；
Blower device 16 is equipped on the outside of first drying unit 12；The blower device is by blast pipe 161 and 162 groups of air-heater
At the setting of air-heater 162 is at 161 middle part of blast pipe；The hot wind air inlet pipe of the blast pipe 161 and the first drying unit 12
17 connections, the hot wind air inlet pipe 17 include air inlet section in the middle part of the first drying unit bottom inflow section 171 and the first drying unit
172 two main lines, the first drying unit bottom inflow section 171 are connected among air inlet section 172 in the middle part of first drying unit
Several branch's air inlet sections 173 are equipped with air-exhausting duct 18 at the top of first drying unit 12, are successively arranged on the air-exhausting duct 18
Cloth dust collector 181, exhaust fan 182.
It is further preferred that second drying unit 15 is tray drying kettle, the discharging of second drying unit 15
Mouth crushes system connectivity with ardealite；11 entrance of screw elevator is connected to semi-finished product conveyer belt 19, and the semi-finished product are defeated
Band 19 is sent to be equipped with semi-finished product elevating hopper 191.
It is further preferred that the preparation process of the air-entrained concrete building block is 201610755447.9 disclosure of patent.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as limitation of the invention, this Shen
Please in embodiment and embodiment in feature in the absence of conflict, can mutual any combination.Protection model of the invention
The technical solution that should be recorded with claim is enclosed, the equivalent replacement side of technical characteristic in the technical solution recorded including claim
Case is protection scope.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.
Claims (10)
1. a kind of high-strength phosphogypsum and air-entrained concrete building block Joint Production sewage recovering system, including ardealite cleaning stirring dress
It sets（1）, which is characterized in that the ardealite cleans agitating device（1）, ardealite steam pressure device bottom the first cleaning solution recycling
Pipeline（2）With waste water circular water treating system（3）Connection, the waste water circular water treating system（3）Also built with air entrained concrete
The cutting machine used in block preparation process（4）Second clean and reuse pipeline of bottom（5）With air-entrained concrete building block preparation process
The steam Sewage treatment pipeline that middle precuring room generates（6）Connection.
2. system according to claim 1, it is characterised in that：The steam pressure equipment is steam pressure vehicle（7）And still kettle（8）.
3. system according to claim 2, it is characterised in that：The still kettle（8）For horizontal autoclave and the steam pressure
Kettle（8）Inside is for steaming maintaining vehicle（81）It passes through.
4. system according to claim 2, it is characterised in that：The steam pressure vehicle（81）Vehicle is equipped with for holding ardealite original
The grinding tool of material（82）, the grinding tool（82）Including bottom plate（821）Be located at bottom plate（821）The mill frame of top（822）.
5. system according to claim 1, it is characterised in that：The waste water circular water treating system（3）It is returned by waste water
It receives and cleans agitating device with ardealite respectively using pipe（1）, air-entrained concrete building block preparation use agitating device（9）Connection.
6. carrying out high-strength phosphogypsum and air-entrained concrete building block Joint Production using system described in claim 1-5 any one
Wastewater recycling process, it is characterised in that：The technique is that ardealite pre-processes water for cleaning, steams in high-strength phosphogypsum preparation process
Equipment is clear after cutting in the water of submergence gypsum, the cleaning waste water of steam pressure equipment and air-entrained concrete building block preparation process during pressure
It washes after the steam waste water generated during waste water, precuring carries out neutralization recycling and is used for reproduction.
7. technique according to claim 6, it is characterised in that：The preparation process of the high-strength phosphogypsum includes following step
Suddenly：
1）Pretreatment：Ardealite is washed repeatedly until its p H value is 7.0, and grinding is stand-by；
2）Steam pressure：By the step 1）Pretreated ardealite is configured to the slurry of certain mass score, and tiling is placed in grinding tool,
Slurry thickness control is placed in steaming maintaining vehicle, is pushed into horizontal autoclave, constant temperature and pressure steam pressure in 5 mm, grinding tool layering；
3）It is dry：Material after steam pressure is quickly transferred to drying system and is dried；
4）It crushes：It is spare to cross 0.125 mm sieve sealing for the high strength gypsum crushing and grinding that will finally prepare.
8. technique according to claim 7, it is characterised in that：The step 3）Drying system includes screw elevator
（11）, it is characterised in that：The screw elevator（11）Discharge port and the first drying unit（12）Feeding inlet connection, described the
One drying unit（12）Discharge port is through screw conveyor（13）, bucket elevator（14）With the second drying unit（15）Feeding inlet
Connection, first drying unit（12）For horizontal tank structure, first drying unit（12）Inside is equipped with mixing chamber
（121）；The mixing chamber（121）In be provided with the first agitating shaft（122）With the second agitating shaft（123）；First agitating shaft
（122）By first motor（124）Driving, second agitating shaft（123）By the second motor（125）Driving, first stirring
Axis（122）With the second agitating shaft（123）It is equipped with paddle（126）, first agitating shaft（122）With the second agitating shaft
（123）The direction of motion it is opposite；
First drying unit（12）Outside is equipped with blower device（16）；The blower device is by blast pipe（161）And hot wind
Machine（162）Composition, the air-heater（162）It is arranged in blast pipe（161）Middle part；The blast pipe（161）It is filled with the first drying
It sets（12）Hot wind air inlet pipe（17）Connection, the hot wind air inlet pipe（17）Including the first drying unit bottom inflow section（171）
With air inlet section in the middle part of the first drying unit（172）Two main lines, the first drying unit bottom inflow section（171）, first
Air inlet section in the middle part of drying unit（172）Centre connects several branch's air inlet sections（173）, first drying unit（12）Top
Equipped with air-exhausting duct（18）, the air-exhausting duct（18）On be successively arranged cloth dust collector（181）, exhaust fan（182）.
9. technique according to claim 8, it is characterised in that：Second drying unit（15）For tray drying kettle, institute
State the second drying unit（15）Discharge port and ardealite crush system connectivity；The screw elevator（11）Entrance and semi-finished product
Conveyer belt（19）Connection, the semi-finished product conveyer belt（19）It is equipped with semi-finished product elevating hopper（191）.
10. technique according to claim 6, it is characterised in that：The preparation process of the air-entrained concrete building block is patent
201610755447.9 open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810594463.3A CN108821619B (en) | 2018-06-11 | 2018-06-11 | High-strength phosphogypsum and aerated concrete block combined production wastewater recovery system and process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810594463.3A CN108821619B (en) | 2018-06-11 | 2018-06-11 | High-strength phosphogypsum and aerated concrete block combined production wastewater recovery system and process |
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| Publication Number | Publication Date |
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| CN108821619A true CN108821619A (en) | 2018-11-16 |
| CN108821619B CN108821619B (en) | 2021-02-09 |
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| CN201810594463.3A Active CN108821619B (en) | 2018-06-11 | 2018-06-11 | High-strength phosphogypsum and aerated concrete block combined production wastewater recovery system and process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112978780A (en) * | 2021-03-19 | 2021-06-18 | 华南理工大学 | Method for purifying phosphogypsum by using aerated concrete steam-pressing condensed water |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3636961C1 (en) * | 1986-10-30 | 1988-03-10 | Interatom | Process for the hot removal of silica from waste waters from sand lime brick production |
| US20070000842A1 (en) * | 2005-07-01 | 2007-01-04 | Collier Andrew J H | Improvements in and relating to waste processing |
| CN202506224U (en) * | 2012-05-01 | 2012-10-31 | 金华市捷晨建材科技有限公司 | Wastewater and sludge recycling system |
| CN103553722A (en) * | 2013-10-24 | 2014-02-05 | 瓮福（集团）有限责任公司 | Method for preparing super phosphate by use of ardealite slag site sewage |
| KR20150034999A (en) * | 2013-09-27 | 2015-04-06 | 한양대학교 에리카산학협력단 | Neutralization method and neutralization apparatus for the recycled water of ready mixed concrete and recycled aggregate treatment water |
-
2018
- 2018-06-11 CN CN201810594463.3A patent/CN108821619B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3636961C1 (en) * | 1986-10-30 | 1988-03-10 | Interatom | Process for the hot removal of silica from waste waters from sand lime brick production |
| US20070000842A1 (en) * | 2005-07-01 | 2007-01-04 | Collier Andrew J H | Improvements in and relating to waste processing |
| CN202506224U (en) * | 2012-05-01 | 2012-10-31 | 金华市捷晨建材科技有限公司 | Wastewater and sludge recycling system |
| KR20150034999A (en) * | 2013-09-27 | 2015-04-06 | 한양대학교 에리카산학협력단 | Neutralization method and neutralization apparatus for the recycled water of ready mixed concrete and recycled aggregate treatment water |
| CN103553722A (en) * | 2013-10-24 | 2014-02-05 | 瓮福（集团）有限责任公司 | Method for preparing super phosphate by use of ardealite slag site sewage |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112978780A (en) * | 2021-03-19 | 2021-06-18 | 华南理工大学 | Method for purifying phosphogypsum by using aerated concrete steam-pressing condensed water |
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