CN109226668A - A kind of inorganic sand regeneration method - Google Patents
A kind of inorganic sand regeneration method Download PDFInfo
- Publication number
- CN109226668A CN109226668A CN201811420874.7A CN201811420874A CN109226668A CN 109226668 A CN109226668 A CN 109226668A CN 201811420874 A CN201811420874 A CN 201811420874A CN 109226668 A CN109226668 A CN 109226668A
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- sand
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- regeneration method
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- boiling
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Classifications
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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
-
- 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
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
-
- 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
- B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of inorganic sand regeneration method, include the following steps: for inorganic old sand Mechanical Crushing to partial size to be less than 6mm, sieving obtains sand A；Sand A is subjected to boiling type roasting in roaster, subsequently into smoldering area, continues to roast, obtains sand B；Sand B mechanical lapping at 250-350 DEG C, cooling, the fine powder of grinding is taken away by air inducing, air inducing with heat recovery for boiling type roasting, obtain sand C；It is mixed water is added in sand C, then water is separated and is recycled, dried, it is cooling, obtain inorganic reclaimed sand.The inorganic sand regeneration rate of method preparation of the invention is high, the method roasted using boiling type, the agglomeration of roasting process high temperature is avoided, increases the boiling that air blast guarantees sand, while wind takes away heat, avoid upper temp excessively high, sand is caused to agglomerate, the heat that wind is taken away can simultaneously serve as the regenerated energy of subsequent wet, opposite wet reclamation, water consumption of the invention is few, and water energy recycles.
Description
Technical field
The invention belongs to casting sand technical fields, and in particular to a kind of inorganic sand regeneration method.
Background technique
Inorganic sand is a kind of free of contamination cleaning founding materials, is commonly used in the casting technique of auto parts and components, inorganic
Application of the sand in casting is increasingly stringenter the share for becoming higher and higher in gravitational casting with environmental requirement, especially
Application in cast aluminium, however, inorganic sand is difficult to regenerate, therefore inorganic sand cannot be cast again because of its characteristic compared to organic sand
It makes and reaches recycling in technique, which has limited popularization of the inorganic sand in casting, and the inorganic old sand in casting was as solid in the past
Useless landfill disposal, but as Environment Protection and Drainage of Pulled Water requires further to deepen, old sand has been forbidden arbitrarily toppling over, therefore, inorganic old sand
Regeneration techniques adapt to industry development requirement, will have vast development prospect.
CN107812881A discloses a kind of regeneration method of inorganic sand, and by machinery, thermal method, mechanical three-level regenerates again,
Both it is not necessary that fresh sand reconciliation is added, without other chemical substances of addition.This method is being heated at high temperature the stage, is easy high temperature knot
Block influences the regeneration rate of inorganic sand.
For these reasons, the present invention is specifically proposed.
Summary of the invention
In order to solve problem above of the existing technology, the present invention provides a kind of inorganic sand regeneration method, the present invention
Method preparation inorganic sand regeneration rate it is high, the method roasted using boiling type is avoided the agglomeration of roasting process high temperature, increased
Air blast guarantees the boiling of sand, while wind takes away heat, avoids upper temp excessively high, sand is caused to agglomerate, the heat that wind is taken away
It can simultaneously serve as the regenerated energy of subsequent wet, opposite wet reclamation, water consumption of the invention is few, and water energy recycles.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of inorganic sand regeneration method, includes the following steps:
(1) inorganic old sand Mechanical Crushing to partial size is less than 6mm, sieving obtains sand A；
(2) sand A is carried out to boiling type roasting in roaster, subsequently into smoldering area, continues to roast, obtains sand B；
(3) sand B mechanical lapping at 250-350 DEG C, cooling, the fine powder of grinding is taken away by air inducing, air inducing with
Heat recovery is roasted for boiling type, obtains sand C；
(4) water will be added in sand C to be mixed, then water is separated and is recycled, is dried, it is cooling, obtain inorganic regeneration
Sand.
Further, the processing of 9-15 mesh is crossed in step (1), preferably crosses the processing of 12 meshes.
The purpose of sieving of the invention is to separate the impurity of the metallic aluminium being wherein mingled with and other blocks.
Further, the roasting of boiling type described in step (2) refers to the air blast below roaster while roasting, makes sand
The state of boiling is presented in A.
The present invention is to prevent inorganic sand from generating agglomeration in high-temperature roasting using boiling type roasting, influences inorganic sand again
Raw rate, in lower section, air blast can guarantee that the inorganic old sand of each grain all in the state of boiling, does not generate the generation of caking phenomenon, from
And improve the regeneration rate of inorganic sand.
Further, the temperature that boiling type roasts in step (2) is 550-650 DEG C, roasts 2-4h.
Further, the temperature in smoldering area is 400-500 DEG C in step (2), roasts 1-2h.
The present invention can make the cover film of sand grain surface using the temperature of above-mentioned boiling type maturing temperature and smoldering area
Embrittlement is conducive to subsequent mechanical grinding removal, and the temperature in smoldering area is lower than the temperature of boiling type roasting, ensure that sand grains roasting when
Between, the sand grains temperature degree in smoldering area will not agglomerate.
Further, mechanical lapping 10-20min in step (3).
Sand grains after high-temperature roasting enters grinder, and sand grains is mutual under machine power and the external wind effect of grinder
The inoranic membrane of collision, sand grain surface is broken, and the big sand grains of weight is come out in the case where mechanical end wind-force is reduced by outlet, and
Broken fine powder is taken away under the action of air inducing by wind-force, and inorganic substances are separated with silica sand.
Further, 60-100 DEG C is cooled in step (3).
Further, the mass ratio of sand C and water is 1:1-5 in step (4).
There is also inorganic substances, Na at the pit of ground treated sand grain surface or gap2O content is higher, mechanical
Sand grains after regeneration sequentially enters subsequent two drum agitation equipment, by washing twice, in each equipment equipped with sand grains and
The mass ratio of water, sand grains and water is 1:1-5, is since the too low water that cannot reach of ratio is to the dissolution of inorganic salts, water is too many
The mutual rubbing action under stirring action between sand grains can be made to reduce, the inorganic matter on surface cannot completely remove, in internal 500-
The blade of 800r/min quickly stirs 2-10min, and then by separator by girt-water separation, the water after separation, which continues back at, to be set
Standby middle continuous use, and by the moisture of external complement reduction.
Further, drying temperature is 100-200 DEG C in step (4), drying time 30-60min.
The heat energy source of drying equipment is the heat that roaster is extracted out by air inducing, accomplishes making full use of for waste heat.
Further, cooling temperature is less than 40 DEG C in step (4).
Compared with prior art, the invention has the benefit that
(1) present invention avoids the agglomeration of roasting process high temperature using the method for boiling type roasting, increases air blast and guarantees sand
Boiling, inorganic sand regeneration rate is high；
(2) increase blower unit in roaster, air inducing takes heat away, avoids upper pyrometer area temperature excessively high, causes
Sand agglomeration, the heat taken away regenerate, water consumption of the invention as the regenerated drying energy of subsequent wet compared to normal wet
It is few, and water energy recycles, it is energy saving.
(3) it is roasted using the stage, reduces consuming excessively for the energy, pass through air inducing dedusting system in entire regenerative process
System removes fine impurities, micro mist, the broken inoranic membrane etc. in sand, and the reclaimed sand quality made is higher, can substitute roughing sand conduct
Facing sand uses.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Embodiment 1
A kind of inorganic sand regeneration method of the present embodiment, includes the following steps:
(1) inorganic old sand Mechanical Crushing to partial size is less than to the individual particle sand of 6mm, crosses the processing of 9 mesh screens, removal is wherein pressed from both sides
Miscellaneous metallic aluminium and other blocks, obtain sand A；
(2) sand A is carried out to boiling type roasting in roaster, the boiling type roasting refers to roasting while roasting
Air blast below furnace makes sand A that the state of boiling be presented, and the temperature of boiling type roasting is 550 DEG C, roasts 4h, subsequently into smoldering area,
Continuation roasts 2h at 400 DEG C, obtains sand B；
(3) sand B mechanical lapping at 250 DEG C, is cooled to 60-100 DEG C, is taken away the fine powder of grinding by air inducing, air inducing
With heat recovery roasted for boiling type, mutually touched under machine power of the sand grains in grinder and external wind effect
It hits, the inoranic membrane of sand grain surface is broken, and the big sand grains of weight is come out in the case where mechanical end wind-force is reduced by outlet, and is broken
Broken fine powder is taken away under the action of air inducing by wind-force, and inorganic substances are separated with sand grains, obtains sand C；
(4) water will be added in sand C to be mixed, the mass ratio of sand C and water is 1:1, successively in two drum agitation equipment
In be stirred, by washing twice, wherein quickly stirring 10min under the revolving speed of 500r/min in each roller, then
Water is separated and recovered secondary use by separator, isolated water continues back at mixes utilization with sand grains in equipment, at 100 DEG C
Lower baking 30-60min is cooled to temperature lower than 40 DEG C, obtains inorganic reclaimed sand.
Embodiment 2
A kind of inorganic sand regeneration method of the present embodiment, includes the following steps:
(1) inorganic old sand Mechanical Crushing to partial size is less than to the individual particle sand of 6mm, crosses the processing of 12 mesh screens, removal is wherein
The metallic aluminium being mingled with and other blocks, obtain sand A；
(2) sand A is carried out to boiling type roasting in roaster, the boiling type roasting refers to roasting while roasting
Air blast below furnace makes sand A that the state of boiling be presented, and the temperature of boiling type roasting is 600 DEG C, roasts 3h, subsequently into smoldering area,
Continuation roasts 1.5h at 450 DEG C, obtains sand B；
(3) sand B mechanical lapping at 300 DEG C, is cooled to 60-100 DEG C, is taken away the fine powder of grinding by air inducing, air inducing
With heat recovery roasted for boiling type, mutually touched under machine power of the sand grains in grinder and external wind effect
It hits, the inoranic membrane of sand grain surface is broken, and the big sand grains of weight is come out in the case where mechanical end wind-force is reduced by outlet, and is broken
Broken fine powder is taken away under the action of air inducing by wind-force, and inorganic substances are separated with sand grains, obtains sand C；
(4) water will be added in sand C to be mixed, the mass ratio of sand C and water is 1:3, successively in two drum agitation equipment
In be stirred, by washing twice, wherein quickly stirring 6min under the revolving speed of 650r/min in each roller, then lead to
It crosses separator and water is separated and recovered secondary use, isolated water continues back at mixes utilization with sand grains in equipment, at 150 DEG C
30-60min is dried, temperature is cooled to lower than 40 DEG C, obtains inorganic reclaimed sand.
Embodiment 3
A kind of inorganic sand regeneration method of the present embodiment, includes the following steps:
(1) inorganic old sand Mechanical Crushing to partial size is less than to the individual particle sand of 6mm, crosses the processing of 15 mesh screens, removal is wherein
The metallic aluminium being mingled with and other blocks, obtain sand A；
(2) sand A is carried out to boiling type roasting in roaster, the boiling type roasting refers to roasting while roasting
Air blast below furnace makes sand A that the state of boiling be presented, and the temperature of boiling type roasting is 650 DEG C, roasts 2h, subsequently into smoldering area,
Continuation roasts 1h at 500 DEG C, obtains sand B；
(3) sand B mechanical lapping at 350 DEG C, is cooled to 60-100 DEG C, is taken away the fine powder of grinding by air inducing, air inducing
With heat recovery roasted for boiling type, mutually touched under machine power of the sand grains in grinder and external wind effect
It hits, the inoranic membrane of sand grain surface is broken, and the big sand grains of weight is come out in the case where mechanical end wind-force is reduced by outlet, and is broken
Broken fine powder is taken away under the action of air inducing by wind-force, and inorganic substances are separated with sand grains, obtains sand C；
(4) water will be added in sand C to be mixed, the mass ratio of sand C and water is 1:5, successively in two drum agitation equipment
In be stirred, by washing twice, wherein quickly stirring 2min under the revolving speed of 800r/min in each roller, then lead to
It crosses separator and water is separated and recovered secondary use, isolated water continues back at mixes utilization with sand grains in equipment, at 200 DEG C
30-60min is dried, temperature is cooled to lower than 40 DEG C, obtains inorganic reclaimed sand.
Comparative example 1 obtains inorganic reclaimed sand according to the method in CN107812881A embodiment 1.
Test example
The survey of following performance is carried out to 1-3 of the embodiment of the present invention and the comparative example 1 inorganic reclaimed sand prepared and Inner Mongol roughing sand
Examination, the results are shown in Table 1.
Table 1
As can be seen from the above table, the properties of the inorganic sand prepared using inorganic sand regeneration method of the invention are superior to
The inorganic reclaimed sand of the method preparation of comparative example 1, and the regeneration rate of the method for the invention is high, performance approaches and roughing sand.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of inorganic sand regeneration method, which comprises the steps of:
(1) inorganic old sand Mechanical Crushing to partial size is less than 6mm, sieving obtains sand A；
(2) sand A is carried out to boiling type roasting in roaster, subsequently into smoldering area, continues to roast, obtains sand B；
(3) sand B mechanical lapping at 250-350 DEG C, cooling, the fine powder of grinding is taken away by air inducing, air inducing with heat
Recycling is roasted for boiling type, obtains sand C；
(4) water will be added in sand C to be mixed, then water is separated and is recycled, is dried, it is cooling, obtain inorganic reclaimed sand.
2. a kind of inorganic sand regeneration method according to claim 1, which is characterized in that crossed at 9-15 mesh in step (1)
Reason preferably crosses the processing of 12 meshes.
3. a kind of inorganic sand regeneration method according to claim 1 or 2, which is characterized in that boiling described in step (2)
Formula roasting refers to the air blast below roaster while roasting, makes sand A that the state of boiling be presented.
4. a kind of inorganic sand regeneration method according to claim 1, which is characterized in that boiling type roasts in step (2)
Temperature is 550-650 DEG C, roasts 2-4h.
5. a kind of inorganic sand regeneration method according to claim 1, which is characterized in that the temperature in smoldering area in step (2)
It is 400-500 DEG C, roasts 1-2h.
6. a kind of inorganic sand regeneration method described in -5 any one according to claim 1, which is characterized in that machine in step (3)
Tool grinds 10-20min.
7. a kind of inorganic sand regeneration method according to claim 1, which is characterized in that step is cooled to 60-100 in (3)
℃。
8. a kind of inorganic sand regeneration method according to claim 1, which is characterized in that the quality of sand C and water in step (4)
Than for 1:1-5.
9. a kind of inorganic sand regeneration method according to claim 1, which is characterized in that drying temperature is in step (4)
100-200 DEG C, drying time 30-60min.
10. a kind of inorganic sand regeneration method according to claim 1, which is characterized in that cooling temperature is small in step (4)
In 40 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420874.7A CN109226668A (en) | 2018-11-21 | 2018-11-21 | A kind of inorganic sand regeneration method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811420874.7A CN109226668A (en) | 2018-11-21 | 2018-11-21 | A kind of inorganic sand regeneration method |
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| CN109226668A true CN109226668A (en) | 2019-01-18 |
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ID=65073505
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| CN201811420874.7A Pending CN109226668A (en) | 2018-11-21 | 2018-11-21 | A kind of inorganic sand regeneration method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109822041A (en) * | 2019-03-27 | 2019-05-31 | 烟台通鼎舟汽车零部件有限公司 | A kind of inorganic antiquated sand regeneration method |
| CN110668779A (en) * | 2019-11-20 | 2020-01-10 | 山东绿源固体废弃物产业化应用研究院 | Production method of inorganic sand |
| CN111468673A (en) * | 2020-04-24 | 2020-07-31 | 南阳仁创砂业科技有限公司 | Regeneration method of used foundry sand |
| CN114101577A (en) * | 2021-11-24 | 2022-03-01 | 北京仁创砂业铸造材料有限公司 | Regeneration method of casting 3D printing waste sand |
| CN115846588A (en) * | 2022-11-17 | 2023-03-28 | 柳晶科技集团股份有限公司 | Regeneration method of casting inorganic waste sand and regenerated sand |
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| CN107812881A (en) * | 2017-10-30 | 2018-03-20 | 合肥仁创铸造材料有限公司 | A kind of inorganic sand renovation process and inorganic reclaimed sand |
| CN108723287A (en) * | 2018-06-11 | 2018-11-02 | 重庆长江造型材料（集团）股份有限公司 | A kind of thermal regeneration method of the inorganic overlay film hygrometric state antiquated sand of silicates |
| CN108723289A (en) * | 2018-08-20 | 2018-11-02 | 青岛百川通达机械有限公司 | A kind of hot method demoulding regenerating furnace, which unloads to shake out, continues to keep the temperature after baking gradually cooling device |
| CN108817312A (en) * | 2018-06-11 | 2018-11-16 | 重庆长江造型材料（集团）股份有限公司 | A kind of mechanical regeneration method of the inorganic overlay film hygrometric state antiquated sand of silicates |
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| GB2114017B (en) * | 1982-02-05 | 1986-02-26 | Gmd A Partnership | Apparatus for reclaiming foundry sand |
| CN104043772A (en) * | 2014-06-20 | 2014-09-17 | 中机中联工程有限公司 | Casting used sand thermal reclamation system |
| CN104858362A (en) * | 2015-04-30 | 2015-08-26 | 北京仁创科技集团有限公司 | Regeneration technology of foundry used sand |
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| CN107812881A (en) * | 2017-10-30 | 2018-03-20 | 合肥仁创铸造材料有限公司 | A kind of inorganic sand renovation process and inorganic reclaimed sand |
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| CN108723289A (en) * | 2018-08-20 | 2018-11-02 | 青岛百川通达机械有限公司 | A kind of hot method demoulding regenerating furnace, which unloads to shake out, continues to keep the temperature after baking gradually cooling device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109822041A (en) * | 2019-03-27 | 2019-05-31 | 烟台通鼎舟汽车零部件有限公司 | A kind of inorganic antiquated sand regeneration method |
| CN110668779A (en) * | 2019-11-20 | 2020-01-10 | 山东绿源固体废弃物产业化应用研究院 | Production method of inorganic sand |
| CN111468673A (en) * | 2020-04-24 | 2020-07-31 | 南阳仁创砂业科技有限公司 | Regeneration method of used foundry sand |
| CN111468673B (en) * | 2020-04-24 | 2021-06-25 | 南阳仁创砂业科技有限公司 | Regeneration method of used foundry sand |
| CN114101577A (en) * | 2021-11-24 | 2022-03-01 | 北京仁创砂业铸造材料有限公司 | Regeneration method of casting 3D printing waste sand |
| CN114101577B (en) * | 2021-11-24 | 2023-12-29 | 北京仁创砂业铸造材料有限公司 | Regeneration method of casting 3D printing waste sand |
| CN115846588A (en) * | 2022-11-17 | 2023-03-28 | 柳晶科技集团股份有限公司 | Regeneration method of casting inorganic waste sand and regenerated sand |
| CN115846588B (en) * | 2022-11-17 | 2024-01-12 | 柳晶科技集团股份有限公司 | Regeneration method of foundry inorganic waste sand and regenerated sand |
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