CN112077260A - Acid consumption value controllable green sand regeneration and recycling process - Google Patents
Acid consumption value controllable green sand regeneration and recycling process Download PDFInfo
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- CN112077260A CN112077260A CN202010933582.4A CN202010933582A CN112077260A CN 112077260 A CN112077260 A CN 112077260A CN 202010933582 A CN202010933582 A CN 202010933582A CN 112077260 A CN112077260 A CN 112077260A
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- sand
- green sand
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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
- B22C5/10—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by dust separating
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a green sand recycling process with controllable acid consumption value, which comprises the steps of collecting green sand waste sand, cutting and crushing the treated green sand waste sand, conveying the cut and crushed green sand waste sand through a cyclone separator after crushing, collecting a small amount of metal residues in the green sand waste sand through a magnetic core, collecting and smelting the small amount of metal residues, and sieving the green sand obtained by separation; weighing the total weight of the screened green sand, weighing the brown corundum abrasive according to the total weight of the obtained green sand, and adding the brown corundum abrasive into the weighed green sand waste sand; placing the mixture of the ground green sand waste sand and the brown corundum abrasive into a roasting furnace for boiling roasting; then cooling is carried out; the green sand waste sand and the brown corundum abrasive are separated to obtain the green sand recovery material, so that the acid consumption value can be controlled by changing the content ratio of the brown corundum abrasive to the green sand waste sand, and the resource waste is avoided.
Description
Technical Field
The invention relates to the technical field of green sand recovery, in particular to a green sand regeneration and recycling process with a controllable acid consumption value.
Background
Green sand is also called green sand. In the casting production, the sand mixture is used as binder, then water and other additives are added, and uniformly mixed, and can be used for moulding and making core, and the sand mould (core) can be directly poured without drying, and the sand is called green mould sand by casting industry. At present, the green sand molding process is widely applied to the automobile accessory production industry, but green sand becomes casting waste sand after being repeatedly used in a system, the waste sand is directly discarded, the environmental pollution is easily caused, and the production cost is increased virtually due to the generation of a large amount of waste sand, so the green sand waste sand needs to be recycled, but only through normal roasting regeneration at present, because the residual bentonite bonded on the original sand is not easy to treat, the acid consumption value of the final regenerated sand is higher, and the green sand cannot be used for the production of casting self-hardening sand and precoated sand, so the improvement is needed.
Disclosure of Invention
The invention aims to provide a tidal sand recycling process with a controllable acid consumption value, and aims to solve the problem that the acid consumption value of reclaimed sand is high and cannot be used for production of casting self-hardening sand and precoated sand in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a tidal sand recycling process with controllable acid consumption value specifically comprises the following steps:
s1, collecting the green sand waste sand, and adsorbing and collecting dust in the green sand waste sand through air blowing equipment in the collecting process;
s2, cutting and crushing the green sand waste sand processed in the step S1, conveying the cut and crushed green sand waste sand through a cyclone separator after crushing, and collecting a small amount of metal residues in the green sand waste sand through a magnetic core, so that the separation effect of the small amount of separated metal residues and a green sand mixture is realized; then, feeding the metal residue obtained by the separation to step S8, and feeding the green sand obtained by the separation to step S2;
s3, screening the green sand processed in the step S2;
s4, weighing the total weight of the screened green sand, and then weighing the brown corundum abrasive material according to the total weight of the obtained green sand, wherein the weight of the brown corundum abrasive material is 5.5-9% of the total weight of the green sand; adding a brown corundum abrasive into the weighed green sand waste sand;
s6, placing the mixture of the ground green sand waste sand and the brown corundum abrasive into a roasting furnace for boiling roasting; then cooling is carried out;
s7, separating the green sand waste sand and the brown corundum abrasive to obtain a green sand recovery material;
and S8, collecting and smelting a small amount of metal residues.
Further, a step S9 is added between the step S3 and the step S4, and the green sand after the sieving process is subjected to a secondary grinding process.
Further, in step S4, the weight of the brown fused alumina mill is 8.5% of the total weight of the green sand.
Further, in step S6, the baking temperature is 660-680 ℃, and the baking time is 7-7.5 hours.
Further, after the green sand waste sand and the brown corundum abrasive are separated in step S7, the brown corundum abrasive is washed with cold water, and then is dried with cold air and recycled.
Further, the air blowing process for the green sand waste sand in step S1 is to separate the dust from the green sand waste sand, and to spray the collected dust to secondarily recover a small amount of green sand waste sand in the dust.
Further, the pulverization is roller-crushed pulverization using guide rollers in step S2.
Further, in step S6, the baking temperature is 660 ℃ and the baking time is 7 hours.
Further, in step S6, cooling is performed by air cooling and isolated water cooling.
According to the tidal sand recycling process with the controllable acid consumption value, the tidal sand waste sand is collected, and dust in the tidal sand waste sand is adsorbed and collected through air blowing equipment in the collection process; cutting and crushing the treated green sand waste sand, conveying the cut and crushed green sand waste sand through a cyclone separator after crushing, and collecting a small amount of metal residues in the green sand waste sand through a magnetic core so as to realize the separation effect on a small amount of separated metal residues and a green sand mixture; then collecting and smelting a small amount of metal residues, and sieving damp mold sand obtained by separation; weighing the total weight of the screened green sand, then weighing the weight of the brown corundum abrasive according to the total weight of the obtained green sand, and adding the brown corundum abrasive into the weighed waste green sand; placing the mixture of the ground green sand waste sand and the brown corundum abrasive into a roasting furnace for boiling roasting; then cooling is carried out; the green sand waste sand and the brown corundum abrasive are separated to obtain a green sand recycling object, so that the green sand waste sand can be rapidly recycled by the method, and meanwhile, the acid consumption value of the green sand waste sand is controlled by using the brown corundum abrasive in the collecting process, so that the adhered bentonite on the waste sand surface can be effectively removed, the aim of reducing the acid consumption value is fulfilled, the acid consumption value is controlled by changing the content ratio of the brown corundum abrasive to the green sand waste sand, the resource waste is avoided, and the operation cost is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the embodiment provides a tidal sand recycling process with controllable acid consumption value, which specifically comprises the following steps:
s1, collecting the green sand waste sand, and adsorbing and collecting dust in the green sand waste sand through air blowing equipment in the collecting process;
s2, cutting and crushing the green sand waste sand processed in the step S1, conveying the cut and crushed green sand waste sand through a cyclone separator after crushing, and collecting a small amount of metal residues in the green sand waste sand through a magnetic core, so that the separation effect of the small amount of separated metal residues and a green sand mixture is realized; then, feeding the metal residue obtained by the separation to step S8, and feeding the green sand obtained by the separation to step S2;
s3, screening the green sand processed in the step S2;
s4, weighing the total weight of the screened green sand, and then weighing the brown corundum abrasive material according to the total weight of the obtained green sand, wherein the weight of the brown corundum abrasive material is 5.5-9% of the total weight of the green sand; adding a brown corundum abrasive into the weighed green sand waste sand;
s6, placing the mixture of the ground green sand waste sand and the brown corundum abrasive into a roasting furnace for boiling roasting; then cooling is carried out;
s7, separating the green sand waste sand and the brown corundum abrasive to obtain a green sand recovery material;
and S8, collecting and smelting a small amount of metal residues.
Further, in step S4, the weight of the brown fused alumina mill is 8.5% of the total weight of the green sand.
Further, in step S6, the baking temperature is 660-680 ℃, and the baking time is 7-7.5 hours.
Further, after the green sand waste sand and the brown corundum abrasive are separated in step S7, the brown corundum abrasive is washed with cold water, and then is dried with cold air and recycled.
Further, the air blowing process for the green sand waste sand in step S1 is to separate the dust from the green sand waste sand, and to spray the collected dust to secondarily recover a small amount of green sand waste sand in the dust.
Further, the pulverization is roller-crushed pulverization using guide rollers in step S2.
Further, in step S6, the baking temperature is 660 ℃ and the baking time is 7 hours.
Further, in step S6, cooling is performed by air cooling and isolated water cooling.
When in work: collecting the green sand waste sand, and adsorbing and collecting dust in the green sand waste sand through air blowing equipment in the collecting process; cutting and crushing the treated green sand waste sand, conveying the cut and crushed green sand waste sand through a cyclone separator after crushing, and collecting a small amount of metal residues in the green sand waste sand through a magnetic core so as to realize the separation effect on a small amount of separated metal residues and a green sand mixture; then collecting and smelting a small amount of metal residues, and sieving damp mold sand obtained by separation; weighing the total weight of the screened green sand, and then weighing the brown corundum abrasive material according to the total weight of the obtained green sand, wherein the weight of the brown corundum abrasive material is 5.5-9% of the total weight of the green sand; adding a brown corundum abrasive into the weighed green sand waste sand; placing the mixture of the ground green sand waste sand and the brown corundum abrasive into a roasting furnace for boiling roasting; then cooling is carried out; the green sand waste sand and the brown corundum abrasive are separated to obtain a green sand recycling object, so that the green sand waste sand can be rapidly recycled by the method, and meanwhile, the acid consumption value of the green sand waste sand is controlled by using the brown corundum abrasive in the collecting process, so that the adhered bentonite on the waste sand surface can be effectively removed, the aim of reducing the acid consumption value is fulfilled, the acid consumption value is controlled by changing the content ratio of the brown corundum abrasive to the green sand waste sand, the resource waste is avoided, and the operation cost is reduced.
Example 2:
the embodiment provides a tidal sand recycling process with controllable acid consumption value, which specifically comprises the following steps:
s1, collecting the green sand waste sand, and adsorbing and collecting dust in the green sand waste sand through air blowing equipment in the collecting process;
s2, cutting and crushing the green sand waste sand processed in the step S1, conveying the cut and crushed green sand waste sand through a cyclone separator after crushing, and collecting a small amount of metal residues in the green sand waste sand through a magnetic core, so that the separation effect of the small amount of separated metal residues and a green sand mixture is realized; then, feeding the metal residue obtained by the separation to step S8, and feeding the green sand obtained by the separation to step S2;
s3, screening the green sand processed in the step S2;
s9, carrying out secondary grinding treatment on the green sand sieved in the step S3;
s4, weighing the total weight of the screened green sand, and then weighing the brown corundum abrasive material according to the total weight of the obtained green sand, wherein the weight of the brown corundum abrasive material is 5.5-9% of the total weight of the green sand; adding a brown corundum abrasive into the weighed green sand waste sand;
s6, placing the mixture of the ground green sand waste sand and the brown corundum abrasive into a roasting furnace for boiling roasting; then cooling is carried out;
s7, separating the green sand waste sand and the brown corundum abrasive to obtain a green sand recovery material;
and S8, collecting and smelting a small amount of metal residues.
The recovery purity of the green sand is improved by the process.
The weight of the brown corundum mill in this example was 9% of the total weight of the green sand.
Example 3:
the embodiment provides a tidal sand recycling process with controllable acid consumption value, which specifically comprises the following steps:
s1, collecting the green sand waste sand, and adsorbing and collecting dust in the green sand waste sand through air blowing equipment in the collecting process;
s2, cutting and crushing the green sand waste sand processed in the step S1, conveying the cut and crushed green sand waste sand through a cyclone separator after crushing, and collecting a small amount of metal residues in the green sand waste sand through a magnetic core, so that the separation effect of the small amount of separated metal residues and a green sand mixture is realized; then, feeding the metal residue obtained by the separation to step S8, and feeding the green sand obtained by the separation to step S2;
s3, screening the green sand processed in the step S2;
s4, weighing the total weight of the screened green sand, and then weighing the brown corundum abrasive according to the obtained total weight of the green sand, wherein the weight of the brown corundum abrasive is 6% of the total weight of the green sand; adding a brown corundum abrasive into the weighed green sand waste sand;
s6, placing the mixture of the ground green sand waste sand and the brown corundum abrasive into a roasting furnace for boiling roasting; then cooling is carried out; the roasting temperature is 670 ℃, and the roasting time is 7.5 hours;
s7, separating the green sand waste sand and the brown corundum abrasive to obtain a green sand recovery material;
and S8, collecting and smelting a small amount of metal residues.
The following are experimental data:
the acid consumption value of example 1 was 4.7;
the acid consumption value of example 2 was 4.5;
the acid consumption value of example 3 was 4.9.
Therefore, experiments prove that the acid consumption value of the regenerated green sand can be controlled by changing the weight ratio of the brown corundum mill to the total weight of the green sand.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The tidal sand recycling process with the controllable acid consumption value is characterized by comprising the following steps:
s1, collecting the green sand waste sand, and adsorbing and collecting dust in the green sand waste sand through air blowing equipment in the collecting process;
s2, cutting and crushing the green sand waste sand processed in the step S1, conveying the cut and crushed green sand waste sand through a cyclone separator after crushing, and collecting a small amount of metal residues in the green sand waste sand through a magnetic core, so that the separation effect of the small amount of separated metal residues and a green sand mixture is realized; then, feeding the metal residue obtained by the separation to step S8, and feeding the green sand obtained by the separation to step S2;
s3, screening the green sand processed in the step S2;
s4, weighing the total weight of the screened green sand, and then weighing the brown corundum abrasive material according to the total weight of the obtained green sand, wherein the weight of the brown corundum abrasive material is 5.5-9% of the total weight of the green sand; adding a brown corundum abrasive into the weighed green sand waste sand;
s6, placing the mixture of the ground green sand waste sand and the brown corundum abrasive into a roasting furnace for boiling roasting; then cooling is carried out;
s7, separating the green sand waste sand and the brown corundum abrasive to obtain a green sand recovery material;
and S8, collecting and smelting a small amount of metal residues.
2. The tidal sand recycling process with controllable acid consumption value as claimed in claim 1, wherein: and adding a step S9 between the step S3 and the step S4, and carrying out secondary grinding treatment on the green sand subjected to the sieving treatment.
3. The tidal sand recycling process with controllable acid consumption value as claimed in claim 1, wherein: in step S4, the brown fused alumina mill weighs 8.5% of the total weight of the green sand.
4. The tidal sand recycling process with controllable acid consumption value as claimed in claim 1, wherein: in step S6, the baking temperature is 660-680 ℃, and the baking time is 7-7.5 hours.
5. The tidal sand recycling process with controllable acid consumption value as claimed in claim 1, wherein: after the green sand waste sand and the brown corundum abrasive are separated in step S7, the brown corundum abrasive is washed by cold water, and is dried by cold air after being washed, and then is recycled.
6. The tidal sand recycling process with controllable acid consumption value as claimed in claim 1, wherein: the air blowing process of the green sand waste sand in step S1 is to separate the dust from the green sand waste sand, and to spray the collected dust to secondarily recover a small amount of green sand waste sand in the dust.
7. The tidal sand recycling process with controllable acid consumption value as claimed in claim 1, wherein: the pulverization is crushed using a guide roller in step S2.
8. The tidal sand recycling process with controllable acid consumption value as claimed in claim 4, wherein: in step S6, the baking temperature is 660 ℃ and the baking time is 7 hours.
9. The tidal sand recycling process with controllable acid consumption value as claimed in claim 1, wherein: in step S6, cooling is performed by air cooling and isolated water cooling.
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| CN202010933582.4A CN112077260A (en) | 2020-09-08 | 2020-09-08 | Acid consumption value controllable green sand regeneration and recycling process |
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| CN202010933582.4A CN112077260A (en) | 2020-09-08 | 2020-09-08 | Acid consumption value controllable green sand regeneration and recycling process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113134567A (en) * | 2021-04-20 | 2021-07-20 | 柳晶（长春）环保科技有限公司 | Regeneration method of mixed waste sand of inorganic waste sand and green mould waste sand and regenerated sand |
| CN113333664A (en) * | 2021-05-17 | 2021-09-03 | 柳晶（溧阳）环保科技有限公司 | High-temperature-resistant precoated sand |
| CN113714461A (en) * | 2021-09-11 | 2021-11-30 | 安徽省含山县威建铸造厂(普通合伙) | Regeneration processing technology of green sand for casting |
| CN114562881A (en) * | 2022-03-01 | 2022-05-31 | 广西兰科资源再生利用有限公司 | Method for recycling casting waste sand based on vertical energy-saving roasting furnace |
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| CN103769531A (en) * | 2014-01-22 | 2014-05-07 | 柳州市柳晶科技有限公司 | Regenerating method of waste sand of casting green sand |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113134567A (en) * | 2021-04-20 | 2021-07-20 | 柳晶（长春）环保科技有限公司 | Regeneration method of mixed waste sand of inorganic waste sand and green mould waste sand and regenerated sand |
| CN113333664A (en) * | 2021-05-17 | 2021-09-03 | 柳晶（溧阳）环保科技有限公司 | High-temperature-resistant precoated sand |
| CN113714461A (en) * | 2021-09-11 | 2021-11-30 | 安徽省含山县威建铸造厂(普通合伙) | Regeneration processing technology of green sand for casting |
| CN114562881A (en) * | 2022-03-01 | 2022-05-31 | 广西兰科资源再生利用有限公司 | Method for recycling casting waste sand based on vertical energy-saving roasting furnace |
| CN114562881B (en) * | 2022-03-01 | 2024-04-26 | 广西兰科资源再生利用有限公司 | Method for recycling foundry waste sand based on vertical energy-saving roasting furnace |
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