CN107470555B - A kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation - Google Patents
A kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation Download PDFInfo
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- CN107470555B CN107470555B CN201710652097.8A CN201710652097A CN107470555B CN 107470555 B CN107470555 B CN 107470555B CN 201710652097 A CN201710652097 A CN 201710652097A CN 107470555 B CN107470555 B CN 107470555B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
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Abstract
The invention belongs to regenerating water-glass old sand and sewage treatment fields, and disclose a kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation.This method includes the following steps: to pre-process used sodium silicate sand in processing pond, and then repeatedly elution and dehydration obtain reclaimed sand and sewage, detects Na2Whether O content is lower than preset value, works as Na2O content is lower than preset value, is dried, completes the regeneration treatment of used sodium silicate sand, work as Na2O content is higher than preset value, carries out scouring regeneration, again dehydration and drying to reclaimed sand；Wherein, the preceding high concentration basic sewage taken off several times returns to processing pond, until the basicity of solution is greater than basicity preset value in the processing pond, processing pond middle and high concentration alkaline sewage is extracted out at this time, the low concentration alkaline sewage taken off several times by after later, which adds in processing pond, to be continued to regenerate old sand.Through the invention, it under less water consumption, can get the reclaimed sand of high quality, and major part alkaline matter can be recycled from regenerated sewage.
Description
Technical field
The invention belongs to regenerating water-glass old sand and sewage treatment fields, wet more particularly, to a kind of used sodium silicate sand
The regenerated alkaline sewage recovery method of method.
Background technique
Water-glass sand is one of three Large Sands being most widely used in Foundry Production, because it is with non-toxic and tasteless, flowing
The advantages that property is good, intensity is high, at low cost is widely used in cast steel, in ironcasting, and annual China generates hundreds and thousands of ten thousand tons
The abandonment of used sodium silicate sand, a large amount of used sodium silicate sands is not only the significant wastage to resource, and huge danger can be also brought to environment
Evil, therefore, the highly efficient regeneration reuse of used sodium silicate sand is particularly important.
Currently, most common method for regenerating water-glass old sand has dry reclamation, thermal reclamation, wet process again in industrial application
It is three kinds raw.Dry reclamation is collision, the friction made between old sand grain and metal component or between sand grains using the method for air or machinery
The regeneration for removing old sand remained on surface adhensive membrane and realizing old sand is acted on, this regeneration method device systems are simple, and it is at low cost,
But regeneration effect is bad, and demoulding rate is low, and reclaimed sand can only be used as floor sand；Thermal reclamation is to be heated old sand by roaster
To certain temperature, remove the regeneration method of flammable residue in old sand, this method regeneration organic binder old sand effect preferably,
Reclaimed sand quality is higher, but energy consumption is high, at high cost；Wet reclamation be using water dissolution, scouring and mechanical agitation into
Row regenerating used, this method favorable regeneration effect, reclaimed sand quality is high, can make facing sand or system sand uses, but device systems compared with
Complexity, water consume, energy consumption are high, need to handle a large amount of sewage.Used sodium silicate sand remained on surface adhensive membrane is highly soluble in water, waterglass
Old sand wet reclamation can get high quality reclaimed sand, can replace fresh sand use, wet reclamation relative to other regeneration methods more
It is suitble to the regeneration of used sodium silicate sand.Currently, it is sewage treatment hardly possible that used sodium silicate sand wet reclamation, which faces maximum challenge,
Problem, many scientific workers have done correlative study with regard to the processing of used sodium silicate sand wet reclamation sewage.
CN102974757A discloses the combination treatment method of regenerating water-glass old sand and the concentration of regeneration treatment liquid, this method
Used sodium silicate sand is placed in regenerating unit, enrichment facility is added in used sodium silicate sand treatment fluid, as to treatment fluid evaporation and obtained by
Steam the regeneration of used sodium silicate sand and the concentration of regeneration treatment liquid are realized to the steaming of used sodium silicate sand leaching, this method is logical more
For 100 DEG C or more of steam to the evaporation and concentration of used sodium silicate sand treatment fluid, actual consumption is higher, and is not easy to realize that industrialization is answered
With.CN204138473U discloses used sodium silicate sand wet reclamation sewage disposal system, the system include cesspool, mixer,
Apparatus for treating sewage, medicine-adding bin and sludge treatment equipment, by being precipitated to sewage flocculation, acid-base neutralization realize the net of sewage
Change, this method processing sewage the result is that determined by pH value and the clarity of water, and the salt in sewage constantly accumulates
More than discharge standard.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of used sodium silicate sand wet reclamatioies
Thus alkaline sewage recovery method solves waterglass by the recycling in regenerative process to the reuse of sewage and alkaline matter
The technical problem that old sand wet reclamation water consumption is big, cost of sewage disposal is high.
To achieve the above object, it is proposed, according to the invention, provide a kind of alkaline sewage recycling of used sodium silicate sand wet reclamation
Method, which is characterized in that this method includes the following steps:
Used sodium silicate sand is pre-processed in processing pond, then repeatedly elution and dehydration obtain reclaimed sand and alkaline sewage,
Detect Na2Whether O content is lower than preset value, works as Na2O content is lower than preset value, and the dry reclaimed sand works as Na2O content is higher than
Preset value cleans regeneration, again dehydration and drying to the reclaimed sand, thus completes the regeneration treatment of the used sodium silicate sand,；
Wherein, the part alkaline sewage is recovered to the processing pond, until the basicity of solution is greater than alkali in the processing pond
Preset value is spent, is then extracted the solution in the processing pond out, and alkaline sewage described in another part is added into processing pond
Middle continuation utilizes again.It is further preferred that the pretreatment is using one of vibration friction, mechanical stirring or microwave oscillation
Or combination.
It is further preferred that the multiple elution and dehydration at least carry out three times, the elution is eluted using water distributor, institute
Dehydration is stated using air pressure or vacuum dehydration.
It is further preferred that the ratio of used sodium silicate sand and water is 1:0.3~1 when the pretreatment.
It is further preferred that the partial alkaline sewage is to be dehydrated for the first time and for the second time obtained alkaline sewage, it is described
Another part alkaline sewage is third time and the alkaline sewage that later dehydration obtains.
It is further preferred that institute's water consumption is eluted in the elution accounts for the 5%~30% of sand weight, it is aqueous in the reclaimed sand
Rate is not higher than 5%.
It is further preferred that the ratio of reclaimed sand and water is 1:0.8~2 when the scouring regenerates.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
1, the sewage that the present invention is removed by reuse continuous during used sodium silicate sand wet reclamation, to keep regenerating
Basicity in processing pond extracts the high concentration basic sewage in processing pond out, can be used as a kind of byproduct recycling alkaline matter；
2, the present invention is recycled by the sewage of low concentration by second and after elution removing later, and is supplemented to regeneration
It replaces clear water to use in processing pond, saves water, reduce production cost；
3, the present invention is simple by step, and operating process is easily controllable, and the product quality after regeneration is high, after regeneration treatment
Substantially without sewage to be treated, water consumption is low, and low energy consumption, and the equipment needed in operating process is simple, is suitble to industrial production.
Detailed description of the invention
Fig. 1 is used sodium silicate sand wet reclamation reusing sewage and basic species constructed by preferred embodiment according to the invention
The flow chart of matter recycling.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Fig. 1 is the used sodium silicate sand wet reclamation that alkaline matter is recycled constructed by preferred embodiment according to the invention
Flow chart, as shown in Figure 1, this method specifically includes the following steps:
(1) used sodium silicate sand and water are mixed in a certain ratio and are added in regeneration treatment pond, carry out wet reclamation processing；
(2) regeneration damp sand takes out dehydration from processing pond, then repeatedly elution, dehydration；
(3) high-concentration sewage removed returns in processing pond through filtering and does next group regenerating used water, until processing
Sewage basicity is more than basicity preset value in pond, which is set as 2mol/L based on experience value, extracts high concentration in pond out
Alkaline sewage does basic materials recycling through filtering；
(4) remove sewage of low concentration through filtering be added processing pond in made up the high-concentration sewage taken out continue to regenerate it is old
Sand；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than preset value, which sets according to actual needs
It is set to 0.05%, then needs clean by force to regenerate and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
Specifically to further illustrate the present invention below with reference to the flow chart of Fig. 1, and in conjunction with following multiple embodiments.
Embodiment 1
(1) by used sodium silicate sand and water, (sand water quality ratio is 1:0.3) mixing is added in regeneration treatment pond by a certain percentage
Carry out vibration friction treatment 15min；
(2) regeneration damp sand is taken out into from processing pond dehydration after vibration friction treatment, then is repeatedly eluted, is dehydrated, often
Secondary elution water consumption is the 15% of reclaimed sand quality, and dehydration to regeneration water-containing rate is not higher than 4% every time；
(3) sewage taken off before damp sand elution and after eluting for the first time is returned directly in regeneration treatment pond after filtration treatment
The regeneration water for doing next group old sand is extracted out dirty in regeneration treatment pond until sewage basicity is more than 2mol/L in regeneration treatment pond
Water does basic materials after filtration treatment；
(4) enter sewage of low concentration reuse after filtration treatment with the sewage taken off after third time elution second of reclaimed sand
Pond directly takes the water of equivalent to be added after high concentration basic sewage is extracted in regeneration treatment pond from sewage of low concentration reuse tank
Continue to regenerate old sand in processing pond；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than 0.05%, then needs to carry out to clean regeneration (sand by force
Water quality ratio is 1:2) and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
Embodiment 2
(1) by used sodium silicate sand and water, (sand water quality ratio is 1:0.5) mixing is added in regeneration treatment pond by a certain percentage
Carry out vibration friction treatment 10min；
(2) regeneration damp sand is taken out into from processing pond dehydration after vibration friction treatment, then is repeatedly eluted, is dehydrated, often
Secondary elution water consumption is the 10% of reclaimed sand quality, and dehydration to regeneration water-containing rate is not higher than 4% every time；
(3) sewage taken off before damp sand elution and after eluting for the first time is returned directly in regeneration treatment pond after filtration treatment
The regeneration water for doing next group old sand is extracted out dirty in regeneration treatment pond until sewage basicity is more than 2mol/L in regeneration treatment pond
Water does basic materials after filtration treatment；
(4) enter sewage of low concentration reuse after filtration treatment with the sewage taken off after third time elution second of reclaimed sand
Pond directly takes the water of equivalent to be added after high concentration basic sewage is extracted in regeneration treatment pond from sewage of low concentration reuse tank
Continue to regenerate old sand in processing pond；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than 0.05%, then needs to carry out to clean regeneration (sand by force
Water quality ratio is 1:1.5) and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
Embodiment 3
(1) by used sodium silicate sand and water, (sand water quality ratio is 1:0.7) mixing is added in regeneration treatment pond by a certain percentage
Carry out vibration friction treatment 8min；
(2) regeneration damp sand is taken out into from processing pond dehydration after vibration friction treatment, then is repeatedly eluted, is dehydrated, often
Secondary elution water consumption is the 5% of reclaimed sand quality, and dehydration to regeneration water-containing rate is not higher than 4% every time；
(3) sewage taken off before damp sand elution and after eluting for the first time is returned directly in regeneration treatment pond after filtration treatment
The regeneration water for doing next group old sand is extracted out dirty in regeneration treatment pond until sewage basicity is more than 2mol/L in regeneration treatment pond
Water does basic materials after filtration treatment；
(4) enter sewage of low concentration reuse after filtration treatment with the sewage taken off after third time elution second of reclaimed sand
Pond directly takes the water of equivalent to be added after high concentration basic sewage is extracted in regeneration treatment pond from sewage of low concentration reuse tank
Continue to regenerate old sand in processing pond；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than 0.05%, then needs to carry out to clean regeneration (sand by force
Water quality ratio is 1:1) and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
Embodiment 4
(1) by used sodium silicate sand and water, (sand water quality ratio is 1:0.8) mixing is added in regeneration treatment pond by a certain percentage
It carries out mechanical stirring and handles 15min；
(2) regeneration damp sand is taken out into from processing pond dehydration after mechanical stirring processing, then is repeatedly eluted, is dehydrated, often
Secondary elution water consumption is the 15% of reclaimed sand quality, and dehydration to regeneration water-containing rate is not higher than 5% every time；
(3) sewage taken off before damp sand elution and after eluting for the first time is returned directly in regeneration treatment pond after filtration treatment
The regeneration water for doing next group old sand is extracted out dirty in regeneration treatment pond until sewage basicity is more than 2mol/L in regeneration treatment pond
Water does basic materials after filtration treatment；
(4) enter sewage of low concentration reuse after filtration treatment with the sewage taken off after third time elution second of reclaimed sand
Pond directly takes the water of equivalent to be added after high concentration basic sewage is extracted in regeneration treatment pond from sewage of low concentration reuse tank
Continue to regenerate old sand in processing pond；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than 0.05%, then needs to carry out to clean regeneration (sand by force
Water quality ratio is 1:1.2) and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
Embodiment 5
(1) by used sodium silicate sand and water, (sand water quality ratio is 1:0.9) mixing is added in regeneration treatment pond by a certain percentage
It carries out mechanical stirring and handles 12min；
(2) regeneration damp sand is taken out into from processing pond dehydration after mechanical stirring processing, then is repeatedly eluted, is dehydrated, often
Secondary elution water consumption is the 10% of reclaimed sand quality, and dehydration to regeneration water-containing rate is not higher than 5% every time；
(3) sewage taken off before damp sand elution and after eluting for the first time is returned directly in regeneration treatment pond after filtration treatment
The regeneration water for doing next group old sand is extracted out dirty in regeneration treatment pond until sewage basicity is more than 2mol/L in regeneration treatment pond
Water does basic materials after filtration treatment；
(4) enter sewage of low concentration reuse after filtration treatment with the sewage taken off after third time elution second of reclaimed sand
Pond directly takes the water of equivalent to be added after high concentration basic sewage is extracted in regeneration treatment pond from sewage of low concentration reuse tank
Continue to regenerate old sand in processing pond；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than 0.05%, then needs to carry out to clean regeneration (sand by force
Water quality ratio is 1:1) and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
Embodiment 6
(1) by used sodium silicate sand and water, regeneration treatment Chi Zhongjin is added in (sand water quality ratio is 1:1) mixing by a certain percentage
Row mechanical stirring handles 10min；
(2) regeneration damp sand is taken out into from processing pond dehydration after mechanical stirring processing, then is repeatedly eluted, is dehydrated, often
Secondary elution water consumption is the 5% of reclaimed sand quality, and dehydration to regeneration water-containing rate is not higher than 5% every time；
(3) sewage taken off before damp sand elution and after eluting for the first time is returned directly in regeneration treatment pond after filtration treatment
The regeneration water for doing next group old sand is extracted out dirty in regeneration treatment pond until sewage basicity is more than 2mol/L in regeneration treatment pond
Water does basic materials after filtration treatment；
(4) enter sewage of low concentration reuse after filtration treatment with the sewage taken off after third time elution second of reclaimed sand
Pond directly takes the water of equivalent to be added after high concentration basic sewage is extracted in regeneration treatment pond from sewage of low concentration reuse tank
Continue to regenerate old sand in processing pond；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than 0.05%, then needs to carry out to clean regeneration (sand by force
Water quality ratio is 1:1) and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
Embodiment 7
(1) by used sodium silicate sand and water, (sand water quality ratio is 1:0.3) mixing is added in regeneration treatment pond by a certain percentage
Carry out microwave concussion processing 8min；
(2) regeneration damp sand is taken out into from processing pond dehydration after microwave concussion processing, then is repeatedly eluted, is dehydrated, often
Secondary elution water consumption is the 10% of reclaimed sand quality, and dehydration to regeneration water-containing rate is not higher than 4% every time；
(3) sewage taken off before damp sand elution and after eluting for the first time is returned directly in regeneration treatment pond after filtration treatment
The regeneration water for doing next group old sand is extracted out dirty in regeneration treatment pond until sewage basicity is more than 2mol/L in regeneration treatment pond
Water does basic materials after filtration treatment；
(4) enter sewage of low concentration reuse after filtration treatment with the sewage taken off after third time elution second of reclaimed sand
Pond directly takes the water of equivalent to be added after high concentration basic sewage is extracted in regeneration treatment pond from sewage of low concentration reuse tank
Continue to regenerate old sand in processing pond；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than 0.05%, then needs to carry out to clean regeneration (sand by force
Water quality ratio is 1:2) and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
Embodiment 8
(1) by used sodium silicate sand and water, (sand water quality ratio is 1:0.4) mixing is added in regeneration treatment pond by a certain percentage
Carry out microwave treatment 6min；
(2) regeneration damp sand is taken out into from processing pond dehydration after microwave concussion processing, then is repeatedly eluted, is dehydrated, often
Secondary elution water consumption is the 30% of reclaimed sand quality, and dehydration to regeneration water-containing rate is not higher than 4% every time；
(3) sewage taken off before damp sand elution and after eluting for the first time is returned directly in regeneration treatment pond after filtration treatment
The regeneration water for doing next group old sand is extracted out dirty in regeneration treatment pond until sewage basicity is more than 2mol/L in regeneration treatment pond
Water does basic materials after filtration treatment；
(4) enter sewage of low concentration reuse after filtration treatment with the sewage taken off after third time elution second of reclaimed sand
Pond directly takes the water of equivalent to be added after high concentration basic sewage is extracted in regeneration treatment pond from sewage of low concentration reuse tank
Continue to regenerate old sand in processing pond；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than 0.05%, then needs to carry out to clean regeneration (sand by force
Water quality ratio is 1:1.5) and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
Embodiment 9
(1) by used sodium silicate sand and water, (sand water quality ratio is 1:0.5) mixing is added in regeneration treatment pond by a certain percentage
Carry out microwave concussion processing 4min；
(2) regeneration damp sand is taken out into from processing pond dehydration after microwave concussion processing, then is repeatedly eluted, is dehydrated, often
Secondary elution water consumption is the 10% of reclaimed sand quality, and dehydration to regeneration water-containing rate is not higher than 4% every time；
(3) sewage taken off before damp sand elution and after eluting for the first time is returned directly in regeneration treatment pond after filtration treatment
The regeneration water for doing next group old sand is extracted out dirty in regeneration treatment pond until sewage basicity is more than 2mol/L in regeneration treatment pond
Water does basic materials after filtration treatment；
(4) enter sewage of low concentration reuse after filtration treatment with the sewage taken off after third time elution second of reclaimed sand
Pond directly takes the water of equivalent to be added after high concentration basic sewage is extracted in regeneration treatment pond from sewage of low concentration reuse tank
Continue to regenerate old sand in processing pond；
(5) if repeatedly elution, dewatered reclaimed sand Na2O content is higher than 0.05%, then needs to carry out to clean regeneration (sand by force
Water quality ratio is 1:0.8) and be dehydrated；
(6)Na2O content is lower than 0.05% wet reclaimed sand, convection drying, stand-by.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (7)
1. a kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation, which is characterized in that this method includes the following steps:
Used sodium silicate sand is pre-processed in processing pond, then repeatedly elution and dehydration obtain reclaimed sand and alkaline sewage, detect
Na2Whether O content is lower than preset value, works as Na2O content is lower than preset value, and the dry reclaimed sand works as Na2O content is higher than default
Value cleans regeneration, again dehydration and drying to the reclaimed sand, thus completes the regeneration treatment of the used sodium silicate sand；
Wherein, the part alkaline sewage is recovered to the processing pond, until the basicity of solution is pre- greater than basicity in the processing pond
If value, then the solution extraction in the processing pond is recycled as basic materials, and by alkaline sewage described in another part
It adds in processing pond and continues to utilize again.
2. a kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation as described in claim 1, which is characterized in that institute
Pretreatment is stated using one of vibration friction, mechanical stirring or microwave oscillation or combination.
3. a kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation as claimed in claim 1 or 2, feature exist
In the multiple elution and dehydration at least carry out three times, and described elute is eluted using water distributor, and the dehydration is using air pressure or very
Sky dehydration.
4. a kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation as described in claim 1, which is characterized in that institute
When stating pretreatment, the ratio of used sodium silicate sand and water is 1:0.3~1.
5. a kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation as described in claim 1, which is characterized in that portion
Dividing the alkaline sewage is to be dehydrated for the first time and for the second time obtained alkaline sewage, and alkaline sewage described in another part is third
The alkaline sewage that secondary and later dehydration obtains.
6. a kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation as described in claim 1, which is characterized in that institute
It states elution institute's water consumption in elution and accounts for the 5%~30% of sand weight, moisture content is not higher than 5% in the reclaimed sand.
7. a kind of alkaline sewage recovery method of used sodium silicate sand wet reclamation as described in claim 1, which is characterized in that institute
When stating scouring regeneration, the ratio of reclaimed sand and water is 1:0.8~2.
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| CN109399652B (en) * | 2018-10-19 | 2020-05-19 | 华中科技大学 | Method for recovering water glass from water glass used sand wet regeneration sewage |
| CN110606537B (en) * | 2019-09-09 | 2021-10-26 | 武汉纺织大学 | Novel method for treating waste water glass sand wet regeneration sewage and application thereof |
| CN111974934B (en) * | 2020-08-13 | 2021-09-24 | 安徽凤阳赛吉元无机材料有限公司 | Device and method for recovering water glass reclaimed sand from water glass used sand |
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| CN1369436A (en) * | 2002-03-08 | 2002-09-18 | 柳云珍 | Process for treating alkaline sewage |
| CN101209485A (en) * | 2007-12-21 | 2008-07-02 | 李江平 | Used sand reclamation method and used sand reclamation thereof |
| CN102974757A (en) * | 2012-12-12 | 2013-03-20 | 武汉纺织大学 | Combined treatment method for used water glass sand reclamation and reclamation treating liquid concentration |
| CN104399876A (en) * | 2014-11-11 | 2015-03-11 | 天津众智科技有限公司 | Method utilizing ultrasonic technology to regenerate used sodium silicate sand |
| CN106807883A (en) * | 2017-04-13 | 2017-06-09 | 华中科技大学 | A kind of method of ultrasonic wave wet reclamation used sodium silicate sand |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369436A (en) * | 2002-03-08 | 2002-09-18 | 柳云珍 | Process for treating alkaline sewage |
| CN101209485A (en) * | 2007-12-21 | 2008-07-02 | 李江平 | Used sand reclamation method and used sand reclamation thereof |
| CN102974757A (en) * | 2012-12-12 | 2013-03-20 | 武汉纺织大学 | Combined treatment method for used water glass sand reclamation and reclamation treating liquid concentration |
| CN104399876A (en) * | 2014-11-11 | 2015-03-11 | 天津众智科技有限公司 | Method utilizing ultrasonic technology to regenerate used sodium silicate sand |
| CN106807883A (en) * | 2017-04-13 | 2017-06-09 | 华中科技大学 | A kind of method of ultrasonic wave wet reclamation used sodium silicate sand |
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