CN107824743B - A kind of waterglass cast used sand in situ regeneration method and device - Google Patents
A kind of waterglass cast used sand in situ regeneration method and device Download PDFInfo
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- CN107824743B CN107824743B CN201710943783.0A CN201710943783A CN107824743B CN 107824743 B CN107824743 B CN 107824743B CN 201710943783 A CN201710943783 A CN 201710943783A CN 107824743 B CN107824743 B CN 107824743B
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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
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Abstract
The present invention relates to a kind of waterglass cast used sand in situ regeneration method and devices, and the method for the present invention includes the following steps: 1, constructing culture pond the bottom of for stacking with used sodium silicate sand；2, water is injected into culture pond, and is added nitrogen salt, microcosmic salt, sylvite and magnesium salts etc. into water and obtained culture medium；3, microalgae group is launched into culture medium and carries out microdisk electrode；4, used sodium silicate sand is sampled and the demoulding rate of used sodium silicate sand is detected, when the pH value that the demoulding rate of used sodium silicate sand is more than the water body in 90% and culture pond is lower than 9, stop culture；5, the culture medium in culture pond is discharged, in-situ regeneration sand is obtained after the used sodium silicate sand after the demoulding in culture pond is dried.The present invention realizes " the double back receipts " of waterglass and regenerating used, effluent cycle utilizes, and since in-situ regeneration sand does not undergo the mechanical friction collision during cleaning, thus maintains the pattern almost the same with fresh sand, gradation and component distributing.
Description
Technical field
The present invention relates to cast metal material reclaiming fields, and in particular to a kind of waterglass cast used sand in-situ regeneration
Method and device.
Background technique
Waterglass (sodium metasilicate) is current most successful inorganic chemistry binder, is used for a long time harmless.With water glass
Glass sand molding, cheap, good fluidity, hardening are fast, and the dimensional accuracy of type (core) is high, in mulling, moulding, casting and knockout mistake
Cheng Zhongjun has no irritating odor or toxic gas generates, also without black pollution.Water virus is from the 1960s through reviving
It after joining incoming China, is widely used, there are about 70% steel-castings to use water-glass sand casting technique for China at present.
However, there is with this major defect for utilization of the waterglass in terms of casting: regenerating water-glass old sand reclamation rate is low.
China has the used sodium silicate sand of up to ten million tons to be discarded every year, and casting waterglass discards sand wash such as mountain.Many scientific and technological strengths
Antiquated sand is directly discarded in rivers and creeks, mountain valley and big marine by poor factory, causes vegetation to be destroyed, and solvable in old sand
Property the substances such as alkalinity waterglass can polluted surface water and underground water to cause serious environmental pollution cause original great ring
The water-glass sand technology of guarantor's advantage is instead at a factor of pollution environment, therefore the use of waterglass is at environmental protection
One double-edged sword.With a series of perfect and to environmental protection the requirement of the mining laws in China, high-quality silica sand is more next
More become scarce resource.The present invention carries out original place recycling aiming at those used sodium silicate sands discarded in mountain valley and other places, both may be used
To create high-quality silica sand resource, waterglass can also be efficiently used, and solve dirt of the discarded old sand for environment
Dye, factory can also be used this method to recycle used sodium silicate sand.The maximum feature of used sodium silicate sand in-situ regeneration technique is to utilize silicon
Algae comes " biological dissolution, degradation " and is attached to the soluble waterglass on old sand.Compared with routine techniques, without biggish wiping of consuming energy
The techniques such as washing can be obtained high-grade regeneration silica sand.Another product of in-situ regeneration technique be enriched in vivo a large amount of sodium from
The wawter bloom diatom of son, silicate ion develops the waterglass preparation process of siccative or incinerated matter based on wawter bloom diatom, can also open
Magnificent diatom of flooding prepares the new side of other high value added products such as white carbon black, famous-brand and high-quality aquatic products open-mouthed bait, siliceous fertilizer, diatom ooze
Method, final purpose are to regenerate the remaining binder in old sand, realize the sustainable development of water-glass sand mold casting.It is important
, carbon dioxide can be consumed during growth of diatom algae, greenhouse effects can be improved in certain degree.The rows such as weaving, printing and dyeing
Industry requires that the waste liquid that the method recycling is rich in waterglass equally can also be used using waterglass inorganic binder.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of waterglass cast used sand in situ regeneration method and devices.
The technical scheme to solve the above technical problems is that
A kind of waterglass cast used sand in situ regeneration method, comprising the following steps:
Step S1, culture pond is constructed the bottom of for stacking with used sodium silicate sand；
Step S2, water is injected into culture pond, and is added nitrogen salt, microcosmic salt and sylvite into water and obtained culture medium；
Step S3, microalgae group is launched into culture medium and carries out microdisk electrode；
Step S4, used sodium silicate sand is sampled and the demoulding rate of used sodium silicate sand is detected, when waterglass is old
The demoulding rate of sand be more than 80% and the water body in culture pond pH value lower than 9 when, stop culture；
Step S5, in-situ regeneration sand is obtained after the used sodium silicate sand after the demoulding in culture pond being dried.
The invention has the benefit that method of the invention is without shifting old sand and cleaning old sand, regenerative power with wet process
From solar energy, mass energy has been saved；And mobile old sand is not needed, it is regenerated in old sand in-situ construction culture pond
Processing, the mechanical friction collision during not undergoing moving process due to in-situ regeneration sand and clean, thus maintain and newly
The almost the same pattern of sand, gradation and component distributing, and waterglass is largely consumed using the suspension microalgae algae for being easy to wawter bloom
The remaining binder on old sand surface realizes " degradation " and " transfer " of waterglass, it can be achieved that waterglass and old by biological dissolution
The double back of sand is received.
Further, the step S1 specifically includes the following steps:
Step S1.1, pond is constructed the bottom of for stacking with used sodium silicate sand；
Step S1.2, in pond central area the hollow of sampling is tested for used sodium silicate sand demoulding rate for pre-buried one
Pipe；
Step S1.3, it is laid with plastic foil in used sodium silicate sand upper surface and pond side wall, hollow pipe outer wall and plastic foil are logical
Marine glue seamless combination is crossed, multiple holes are additionally provided on the plastic foil of used sodium silicate sand upper surface.
Using the carry out old sand sampling that has the beneficial effect that hollow pipe and can be convenient of above-mentioned further scheme, plastic foil can
To make the surface of pond inner wall formation integral waterproofing to soil, culture medium can be penetrated into used sodium silicate sand by hole, will
Used sodium silicate sand impregnates, while the plastic foil of used sodium silicate sand upper surface can prevent microalgae group to be mixed into used sodium silicate sand.
Further, the diameter of described hole be 0.01-1mm and be arranged in used sodium silicate sand upper surface plastic foil it is close
The region of pond side wall.
Further, the urea containing 0.01~0.1g/L in the culture medium in the step S2,0.02~0.08g/L's
K2HPO4, the MgSO of 0.03~0.14g/L4, the CaCl of 0.01g~0.04g/L2With the KH of 0.04~0.16g/L2PO4。
Using having the beneficial effect that by adding nutritive salt for above-mentioned further scheme, can be mentioned for the growth of microalgae group
Suitable nutrient environment has been supplied, has been conducive to microalgae group and preferably grows and breeding.
Further, the algae in the microalgae group in the step S3 includes shank algae, boat-shaped algae, plumage line algae, star bar
One of algae, melosira, small ring algae, crisp bar algae, root canal algae and double water chestnut algaes are a variety of.
A variety of microalgaes are once cultivated using having the beneficial effect that for above-mentioned further scheme, are increased between microalgae not of the same race
It vies each other, accelerates the growth and breeding of microalgae group.And select to add the microalgae group of certain primary quantity, so that water body
In a degree of wawter bloom state, the incubation time of microalgae group is reduced.
Further, the microalgae flora content in the step S3 in culture medium is 1.0 × 107~1 × 109A/L.
Using having the beneficial effect that by controlling water volume flow rate and temperature for above-mentioned further scheme, make microalgae
Group is in certain suitable growing environment, is conducive to the growth and breeding of microalgae group, to improve waterglass
Absorption rate.
A kind of waterglass cast used sand situ regeneration device, including culture pond and used sodium silicate sand, the used sodium silicate sand
Positioned at culture bottom of pond portion, it is placed with culture medium in the culture pond, microalgae group is placed in the culture medium.
Further, the culture pond is the pond that the old sand on used sodium silicate sand stacking ground is bottom building, and in pond
Heart district domain is embedded with the hollow pipe of a test sampling for used sodium silicate sand demoulding rate；In used sodium silicate sand upper surface and pond
Pool side wall is equipped with plastic foil, hollow pipe outer wall and plastic foil and passes through marine glue seamless combination, the modeling of used sodium silicate sand upper surface
Multiple holes are additionally provided on material film.
Further, the algae in the microalgae group include shank algae, boat-shaped algae, plumage line algae, star bar algae, melosira,
One of small ring algae, crisp bar algae, root canal algae and double water chestnut algaes are a variety of.
Further, be additionally provided with irrigation and drainage and heating system in the culture pond, the irrigation and drainage and heating system be used for
It discharges water or draws water in culture pond, inflate or be evacuated to culture pond, and culture medium is heated.
Detailed description of the invention
Fig. 1 is the device of the invention structural schematic diagram.
In attached drawing, parts list represented by the reference numerals are as follows:
1, culture pond；2, used sodium silicate sand；3, culture medium；4, microalgae group；5, hollow pipe；6, plastic foil；7, hole；8,
Irrigation and drainage and heating system；9, dead or suspension difference algae
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
A kind of waterglass cast used sand in situ regeneration method, comprising the following steps:
Step S1, culture pond is constructed the bottom of for stacking with used sodium silicate sand；
The step S1 specifically includes the following steps:
Step S1.1, pond is constructed the bottom of for stacking with used sodium silicate sand；
Step S1.2, in pond central area the hollow of sampling is tested for used sodium silicate sand demoulding rate for pre-buried one
Pipe；
Step S1.3, it is laid with plastic foil in used sodium silicate sand upper surface and pond side wall, hollow pipe outer wall and plastic foil are logical
Marine glue seamless combination is crossed, multiple holes are additionally provided on the plastic foil of used sodium silicate sand upper surface.
The diameter of described hole is 0.01-1mm and the plastic foil of used sodium silicate sand upper surface is arranged in close to pond side wall
Region.
Step S2, water is injected into culture pond, and is added nitrogen salt, microcosmic salt and sylvite into water and obtained culture medium；
Urea containing 0.01~0.1g/L in culture medium in the step S2, the K of 0.02~0.08g/L2HPO4,
The MgSO of 0.03~0.14g/L4, the CaCl of 0.01g~0.04g/L2With the KH of 0.04~0.16g/L2PO4。
Step S3, microalgae group is launched into culture medium and carries out microdisk electrode；
The algae in microalgae group in the step S3 include shank algae, boat-shaped algae, plumage line algae, star bar algae, melosira,
One of small ring algae, crisp bar algae, root canal algae and double water chestnut algaes are a variety of.
Microalgae flora content in the step S3 in culture medium is 1.0 × 107~1 × 109A/L.
Step S4, used sodium silicate sand is sampled and the demoulding rate of used sodium silicate sand is detected, when waterglass is old
The demoulding rate of sand be more than 80% and the water body in culture pond pH value lower than 9 when, stop culture；
Step S5, in-situ regeneration sand is obtained after the used sodium silicate sand after the demoulding in culture pond being dried.
As shown in Figure 1, a kind of waterglass cast used sand situ regeneration device, including culture pond 1 and used sodium silicate sand 2, institute
It states used sodium silicate sand 2 and is located at 1 bottom of culture pond, culture medium 3 is placed in the culture pond 1, is placed in the culture medium micro-
Algae group 4.
The culture pond 1 be used sodium silicate sand stack ground old sand be bottom building pond, and it is pre- in pond central area
It is embedded with the hollow pipe 5 of a test sampling for used sodium silicate sand demoulding rate；In 2 upper surface of used sodium silicate sand and pond side wall
It is equipped with plastic foil 6, hollow pipe outer wall and plastic foil and passes through marine glue seamless combination, the plastic foil of 2 upper surface of used sodium silicate sand
On be additionally provided with multiple holes 7.
Algae in the microalgae group 4 includes shank algae, boat-shaped algae, plumage line algae, star bar algae, melosira, small ring algae, crisp
One of bar algae, root canal algae and double water chestnut algaes are a variety of, and microalgae group swims in culture epibasal tier, and Mortality or suspension are poor
Algae be deposited in culture hypobasal, 9 be dead or suspension difference algae in figure.
Irrigation and drainage and heating system 8 are additionally provided in the culture pond 1, the irrigation and drainage and heating system are used for into culture pond
It discharges water or draws water, inflate or be evacuated to culture pond, and culture medium 3 is heated.
Embodiment 1:
In summer and autumn in spring, pond is constructed the bottom of as using the old sand that old sand stacks ground；Pre-buried one of pond central area is hollow
For pipe for the test sampling of old sand demoulding rate, the diameter for moulding pipe is 80mm；Old sand upper surface, pool wall spread one layer of intact plastic film, in advance
Pipe laying outer wall and plastic foil use fine needle Zha Dong, hole diameter by marine glue seamless combination on the plastic foil of wall portions
For 0.05mm, culture pond is formed；Underground water is injected in the culture pond formed to plastic foil, water can penetrate into water glass by hole
In glass old sand, used sodium silicate sand is impregnated, water depth 1m, and put into nutritive salt: urea 0.05g/L, K2HPO4For
0.04g/L, MgSO4For 0.07g/L, CaCl2For 0.02g/L, KH2PO4For 0.08g/L；By microalgae group (shank algae, straight chain
Algae, boat-shaped algae, star bar algae) it launches into culture pond, the injected volume of microalgae group is 2 × 107A/L, and large-scale culture is micro-
Algae；Used sodium silicate sand is repeatedly sampled, when the demoulding rate of used sodium silicate sand be more than 80% and water body pH value lower than 9 when,
Stop culture；The slowly water in discharge culture pond, obtains microalgae and reclaimed sand, microalgae can be used as bait, siliceous fertilizer after drying
Deng.
Example 2:
In winter, pond is constructed the bottom of as using the old sand that old sand stacks ground；The pre-buried hollow pipe in pond central area is used for
The test sampling of old sand demoulding rate, the diameter for moulding pipe is 80mm；Old sand upper surface, pool wall spread one layer of intact plastic film, outside built-in pipe
Wall and plastic foil use fine needle Zha Dong, hole diameter is by marine glue seamless combination on the plastic foil of wall portions
0.05mm forms culture pond；Underground water is injected in the culture pond formed to plastic foil, water can penetrate into waterglass by hole
In old sand, used sodium silicate sand is impregnated, water depth 1.5m, and put into nutritive salt: urea 0.05g/L, K2HPO4For
0.04g/L, MgSO4For 0.07g/L, CaCl2For 0.02g/L, KH2PO4For 0.08g/L；By microalgae group (shank algae, straight chain
Algae, boat-shaped algae, star bar algae) it launches into culture pond, the injected volume of microalgae group is 5 × 108A/L opens heat pump, keeps water
Temperature is at 15 DEG C or so, and large-scale culturing micro-algae；Used sodium silicate sand is repeatedly sampled, the demoulding rate to used sodium silicate sand is super
Cross 80% and water body pH value lower than 9 when, stop culture；The slowly water in discharge culture pond, obtains microalgae and reclaimed sand, microalgae
It can be used as bait, siliceous fertilizer etc. after drying.
Example 3:
In rainy period, pond is constructed the bottom of as using the old sand that old sand stacks ground；The pre-buried hollow pipe in pond central area
It tests and samples for old sand demoulding rate, the diameter for moulding pipe is 80mm；Old sand upper surface, pool wall spread one layer of intact plastic film, pre-buried
Pipe outer wall and plastic foil use fine needle Zha Dong, hole diameter is by marine glue seamless combination on the plastic foil of wall portions
0.05mm forms culture pond；Underground water is injected in the culture pond formed to plastic foil, water can penetrate into waterglass by hole
In old sand, used sodium silicate sand is impregnated, water depth 1m, and put into nutritive salt: urea 0.05g/L, K2HPO4For 0.04g/
L, MgSO4For 0.07g/L, CaCl2For 0.02g/L, KH2PO4For 0.08g/L；By microalgae group (shank algae, melosira, boat-shaped
Algae, star bar algae) it launches into culture pond, the injected volume of microalgae group is 2 × 107A/L, and large-scale culturing micro-algae；Work as water level
When rising to 1.5m, irrigation and drainage water system is opened, maintains water level within 1.6m, used sodium silicate sand is repeatedly sampled, to water
The demoulding rate of glass sand be more than 80% and water body pH value lower than 9 when, stop culture；The slowly water in discharge culture pond, is obtained
Microalgae and reclaimed sand are obtained, microalgae can be used as bait, siliceous fertilizer etc. after drying.
Example 4:
In period of drought, pond is constructed the bottom of as using the old sand that old sand stacks ground；The pre-buried hollow pipe in pond central area
It tests and samples for old sand demoulding rate, the diameter for moulding pipe is 80mm；Old sand upper surface, pool wall spread one layer of intact plastic film, pre-buried
Pipe outer wall and plastic foil use fine needle Zha Dong, hole diameter is by marine glue seamless combination on the plastic foil of wall portions
0.05mm forms culture pond；Underground water is injected in the culture pond formed to plastic foil, water can penetrate into waterglass by hole
In old sand, used sodium silicate sand is impregnated, water depth 1.5m, and put into nutritive salt: urea 0.05g/L, K2HPO4For
0.04g/L, MgSO4For 0.07g/L, CaCl2For 0.02g/L, KH2PO4For 0.08g/L；By microalgae group (shank algae, straight chain
Algae, boat-shaped algae, star bar algae) it launches into culture pond, the injected volume of microalgae group is 2 × 107A/L, and large-scale culture is micro-
Algae；When water level decreasing is to 1m, irrigation and drainage water system is opened, maintains water level in 0.9m or more, used sodium silicate sand is repeatedly taken
Sample, when the demoulding rate of used sodium silicate sand be more than 80% and water body pH value lower than 9 when, stop culture；Slowly in discharge culture pond
Water, obtain microalgae and reclaimed sand, microalgae can be used as bait, siliceous fertilizer etc. after drying.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of waterglass cast used sand in situ regeneration method, which comprises the following steps:
Step S1, culture pond is constructed the bottom of for stacking with used sodium silicate sand；
Step S2, water is injected into culture pond, and is added nitrogen salt, microcosmic salt, sylvite and magnesium salts into water and obtained culture medium；
Step S3, microalgae group is launched into culture medium and carries out microdisk electrode；
Step S4, used sodium silicate sand is sampled and the demoulding rate of used sodium silicate sand is detected, when used sodium silicate sand
Demoulding rate be more than 90% and the water body in culture pond pH value lower than 9 when, stop culture；
Step S5, in-situ regeneration sand is obtained after the used sodium silicate sand after the demoulding in culture pond being dried.
2. waterglass cast used sand in situ regeneration method as described in claim 1, it is characterised in that: the step S1 is specifically wrapped
Include following steps:
Step S1.1, pond is constructed the bottom of for stacking with used sodium silicate sand；
Step S1.2, in pre-buried one of the pond central area hollow pipe sampled for the test of used sodium silicate sand demoulding rate；
Step S1.3, plastic foil, hollow pipe outer wall and plastic foil are laid with by preventing in used sodium silicate sand upper surface and pond side wall
Glue seamless combination is additionally provided with multiple holes on the plastic foil of used sodium silicate sand upper surface.
3. waterglass cast used sand in situ regeneration method as claimed in claim 2, it is characterised in that: the diameter of described hole is
0.01-1mm and the plastic foil of used sodium silicate sand upper surface is set close to the region of pond side wall.
4. waterglass cast used sand in situ regeneration method as described in claim 1, it is characterised in that: the training in the step S2
Support the urea containing 0.01~0.1g/L in base, the K of 0.02~0.08g/L2HPO4, the MgSO of 0.03~0.14g/L4, 0.01g
The CaCl of~0.04g/L2With the KH of 0.04~0.16g/L2PO4。
5. waterglass cast used sand in situ regeneration method as described in claim 1, it is characterised in that: micro- in the step S3
Algae in algae group includes shank algae, boat-shaped algae, plumage line algae, star bar algae, melosira, small ring algae, crisp bar algae, root canal algae and double
One of water chestnut algae is a variety of.
6. waterglass cast used sand in situ regeneration method as described in claim 1, it is characterised in that: cultivated in the step S3
Microalgae flora content in base is 1.0 × 107~1 × 109A/L.
7. a kind of waterglass cast used sand situ regeneration device, which is characterized in that including culture pond (1) and used sodium silicate sand (2),
The used sodium silicate sand (2) is located at culture pond (1) bottom, is placed with culture medium (3), the culture medium in the culture pond (1)
It is inside placed with microalgae group (4), the culture pond (1) is be bottom building pond with stacking with original used sodium silicate sand, described
Culture pond (1) is used to carry out in-situ regeneration processing to old sand on original place.
8. waterglass cast used sand situ regeneration device according to claim 7, which is characterized in that the culture pond (1)
For be bottom building pond with stacking with used sodium silicate sand, and pond central area be embedded with one it is de- for used sodium silicate sand
The hollow pipe (5) of the test sampling of film rate；Plastic foil (6), hollow pipe are equipped in used sodium silicate sand upper surface and pond side wall
Outer wall and plastic foil pass through marine glue seamless combination, are additionally provided with multiple holes on the plastic foil (6) of used sodium silicate sand (2) upper surface
Hole (7).
9. waterglass cast used sand situ regeneration device according to claim 7, which is characterized in that the microalgae group
(4) algae in includes shank algae, boat-shaped algae, plumage line algae, star bar algae, melosira, small ring algae, crisp bar algae, root canal algae and double water chestnuts
One of algae is a variety of.
10. waterglass cast used sand situ regeneration device according to claim 7, which is characterized in that in the culture pond
It is additionally provided with irrigation and drainage and heating system (8), the irrigation and drainage and heating system are for discharging water or drawing water into culture pond, to culture pond
Inflation or pumping, and culture medium (3) is heated.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078915A (en) * | 2009-11-27 | 2011-06-01 | 天津市澳康建筑装饰工程有限责任公司 | Used water glass sand regeneration method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4008856A (en) * | 1975-09-17 | 1977-02-22 | Sears Edward A | Reclaiming system for foundry sand |
| ES2034025T3 (en) * | 1988-05-26 | 1993-04-01 | Pohl Giessereitechnik | PROCEDURE FOR THE RECOVERY OF USED SAND FROM FOUNDRY AND ITS CORRESPONDING EQUIPMENT. |
| US4960162A (en) * | 1989-02-17 | 1990-10-02 | Esco Corporation | Method of reclaiming foundry sand |
| CN102336498B (en) * | 2011-06-28 | 2013-03-13 | 蔡志武 | Nitrogen-phosphorus wastewater treating method by sequencing batch reactor coupled photobioreactor |
| CN102974757B (en) * | 2012-12-12 | 2015-05-20 | 武汉纺织大学 | Combined treatment method for used water glass sand reclamation and reclamation treating liquid concentration |
| CN105924053A (en) * | 2016-04-13 | 2016-09-07 | 苏州思创源博电子科技有限公司 | Preparation method of regenerated concrete |
| CN106807883B (en) * | 2017-04-13 | 2019-03-05 | 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 |
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| CN102078915A (en) * | 2009-11-27 | 2011-06-01 | 天津市澳康建筑装饰工程有限责任公司 | Used water glass sand regeneration method |
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