KR101853330B1 - Apparatus for recycling moulding sand - Google Patents

Apparatus for recycling moulding sand Download PDF

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Publication number
KR101853330B1
KR101853330B1 KR1020160018261A KR20160018261A KR101853330B1 KR 101853330 B1 KR101853330 B1 KR 101853330B1 KR 1020160018261 A KR1020160018261 A KR 1020160018261A KR 20160018261 A KR20160018261 A KR 20160018261A KR 101853330 B1 KR101853330 B1 KR 101853330B1
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South Korea
Prior art keywords
waste
firing
firing unit
rotary
dryer
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KR1020160018261A
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Korean (ko)
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KR20170096705A (en
Inventor
이세린
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주식회사 에스알그린
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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
    • 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
    • B22C5/14—Equipment for storing or handling the dressed mould material, forming part of a plant for preparing such material
    • B22C5/16—Equipment for storing or handling the dressed mould material, forming part of a plant for preparing such material with conveyors or other equipment for feeding the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The present invention relates to a firing process used in the process of drying and pyrolyzing and removing impurities of a waste maggot,
A rotary kiln 30 for drying the waste grinding sand, a rotary first firing unit 40 for first pyrolyzing the waste grinding sand, a rotary second firing unit 50 for second pyrolyzing the waste grinding sand and a second firing unit 50 for pyrolysis By arranging the rotary cooler 60 for cooling the fired product along the vertical direction through the mutual conveyors 46, 56 and 66,
The space utilization according to the firing of the waste maggot is maximized so that the maximum yield can be obtained in the minimum space and the reliability of the regeneration molding mortar is improved by uniformly applying heat in the firing process of the waste maggot.

Figure R1020160018261

Description

[0001] APPARATUS FOR RECYCLING MOLDING SAND [

The present invention relates to a firing machine used in the process of pyrolyzing and removing impurities in a waste grinding machine. In particular, the firing machines are stacked along the vertical direction to maximize the space utilization, and the firing machines are rotated to improve the pyrolysis efficiency The present invention relates to a recycling apparatus for a waste chrysanthemum.

In general, molding sand is used as a molding material in the process of casting a molding having a complicated structure such as an engine or a screw. Such molding sand is manufactured by mixing resin or binder with silica sand subjected to drying and heat treatment, If the lifetime is reached, it is discarded.

However, in spite of being a material containing a large amount of dust, synthetic resin, iron powder, carbonized sludge and heavy metal which cause environmental pollution, the waste paper is subject to disposal of about 90% or more by simple landfilling. In particular, Considering the fact that it is dependent on imports, there is an urgent need for research on the prevention of environmental pollution sources as well as for regeneration considering import substitution effects.

Since the wet process includes disadvantages of generating wastewater in the process of removing impurities, the wet process may be performed by a dry method using a friction method or a polishing method, a dry method using a liquid type or a rotary Various sintering methods using equations are under study.

For example, as a method of firing the waste chestnut, a waste chopper that is crushed to a predetermined size by a crusher and passed through a separator is charged into a pyrolysis furnace, and then the casting pyrolyzed by the pyrolysis furnace is cooled using a chiller, An apparatus for collecting dust by using the apparatus has been developed.

However, since the method of firing the waste chestnut is a method of discharging hot air or heat generated by the pyrolysis furnace as it is, the energy efficiency of the waste chrysanthemum is regenerated, and the cooling is forced by the cooler, There is a problem that waste of the battery is generated.

In addition, many heat source recycling apparatuses have been developed for recycling heat generated by the thermal decomposition furnace, for example, in the process of sintering the waste maggot. However, most of these apparatuses have insufficient recovery and reuse of heat energy, Research on the device that increases the efficiency is urgent.

In addition, although a method of disposing a plurality of the pyrolysis furnaces in the firing process of the waste chimney yarn is applied, for example, a space occupied by the pyrolysis furnaces is required to increase the installation cost and the operation cost. In addition, There is a problem that heat loss occurs.

[references]

* Registration Patent No. 10-1246745 (Registered on March 31, 2013)

* Registered Patent Publication No. 10-1064052 (Registered on September 2, 2011.)

* Registration Utility Model Bulletin No. 20-0260693 (Registered Date: Jan. 12, 2002)

Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to maximize the space utilization by constructing the firing units in a stacking manner along the vertical direction and to improve the thermal diffusing efficiency And it is an object of the present invention to provide a recycling apparatus for a waste chrysanthemum.

According to an aspect of the present invention, A crusher for crushing the waste sand, a de-ironing machine for removing the iron powder of the waste sand crushed by the crusher, a rotary dryer for heating and drying the crushed material passed through the de-ironing machine, A rotary type first firing unit for pyrolyzing impurities by heating the dried material dried by the dryer; A rotary second firing unit for heating and re-pyrolyzing the fired product pyrolyzed by the first firing unit; And a rotary cooler for receiving and cooling the fired product in which the impurities are pyrolyzed by the second firing unit; The dryer, the first firing unit, the second firing unit, and the cooler are sequentially connected to each other along the vertical direction through respective conveyors.

As described above, the present invention includes at least the following effects.

First, by arranging the firing units in a stacked manner in the vertical direction through the respective conveyors, it is possible to obtain a maximum yield in the minimum space by maximizing space utilization due to firing of the waste chrysanthemum.

Secondly, in the regeneration process of the waste chrysanthemum, a multistage calcination cycle is constructed to continuously perform drying, pyrolysis and cooling, thereby improving the yield of recycling of the waste chrysanthemum as well as recycling waste heat, which is very economical.

Thirdly, since the burner is multi-stage and rotatable, the heat is evenly injected during the sintering of the waste maggot, so that the oxidation of the impurities is smoothly performed, thereby improving the reliability of the regeneration operation.

Fourthly, by constituting the firing units in a multi-stage and selectively controlling the firing temperature and the firing time, the waste grinding wares are not damaged during the firing process, and the yield is improved and contamination such as odor is not generated.

FIG. 1 is a conceptual view showing a recycling apparatus for a waste sand in accordance with the present invention,
2 is a flow chart showing a recycling apparatus for a waste sand in accordance with the present invention.

Hereinafter, an embodiment according to the present invention will be described.

1 and 2, the present invention comprises a crusher 10 for crushing a waste sand; A deaerator (20) for removing the iron powder of the crushed waste paper crushed by the crusher (10); A rotary dryer 30 for heating and drying the crushed material passed through the de-ironing machine 20; A rotary type first firing unit (40) for heating the dried material dried by the dryer (30) to pyrolyze impurities; A rotary second firing unit 50 for heating and re-pyrolyzing the fired product pyrolyzed by the first firing unit 40; And a rotary cooler (60) for receiving and cooling the fired product of the impurities pyrolyzed by the second firing unit (50), wherein the dryer (30), the first firing unit (40) The pen 50 and the cooler 60 are arranged in a laminated manner by being connected to each other along the vertical direction through the respective conveyors 46, 56 and 66.

Here, the regenerator 1 according to the present invention is characterized in that after removing the iron content by the de-ironing machine 20 in a state where the waste sand conveyed by the conveyer 80 is crushed by the crusher 10, Drying and heating while passing through the dryer 30 and the firing units 40 and 50, and cooling by the cooler 60.

The conveyor 80 collects the waste paper and supplies the waste paper to the crusher 10, and it is preferable to configure a mechanism such as a belt conveyor to increase the conveying efficiency of the waste paper.

The crusher 10 finely crushes the waste sand conveyed by the conveyor 80 and includes first and second crushers 14.16 and 14.16 for crushing the waste sand that is charged into the hopper 12 and supplied through the conveyor, And a screen (18) for screening the pulverized crushers pulverized to an appropriate size by the first and second crushers (14, 16).

At this time, it is preferable that the screen 18 is constituted by a vibrating screen to increase efficiency according to sorting of the waste paper.

The crusher 10 also includes a conveyor 12-2 for supplying the waste paper to the screen 18 as well as a conveyor 12-2 for returning the waste paper crushed by the screen 18 to the second crusher 16, 4 are provided.

At this time, the conveyors 12-2 and 12-4 perform a function of lowering or elevating the waste paper, and thus the bucket conveyor is preferable.

The de-ironing machine 20 is mounted on a discharge pipe of the crusher 10 to remove iron powder contained in the crushed product of the crusher 10, and a magnet is mounted on a discharge pipe of the crusher 10. However, even if a permanent magnet is applied, it is obvious that it is included in the technical category of the present invention.

The dryer 30 is configured to receive and dry the waste ash removed from the iron removal device 20 by the iron removal device 20 and conveyed through the conveyor 32, Dry for 35 minutes.

Of course, since the conveyor 32 functions to transfer the waste paper to a higher position, a bucket conveyor is preferably used.

At this time, it is preferable that the dryer (30) is formed as a rotary kiln so that the waste maggot

The reason for setting the drying temperature and the drying time of the above-mentioned waste chrysanthemum is that the drying time is long and the yield is lowered at below 250 DEG C and less than 25 minutes. Because.

In addition, it is preferable to configure the surge number 34 as a means for temporarily storing the waste paper with the iron particles removed, as well as drying the waste paper by heating the waste paper to some extent in the inflow path of the dryer 30.

Of course, the conveyor 36 is preferably a screw conveyor in consideration of thermal damage of the waste paper.

The first fusing unit 40 is a first pyrolysis unit for thermally decomposing the waste charcoal that is dried in the dryer 30 and conveyed through the conveyor 46. The waste charcoal is pyrolyzed in a temperature range of 300 to 600 ° C. for 25 to 35 minutes Followed by baking treatment.

Particularly, it is preferable that the first fusing unit 40 is formed as a rotary kiln so that the waste maggot can be evenly dried while rotating.

At this time, the reason why the drying temperature and the drying time of the waste maggot are set is that the drying time is long and the yield is lowered at a temperature of less than 300 DEG C and less than 25 minutes, and energy is more than 600 DEG C and more than 35 minutes to be.

The first firing unit 40 includes a burner 42 for supplying a heat source necessary for thermal decomposition of the waste maggot and a heat exchanger 44 for keeping the internal temperature of the first firing unit 40 uniform It is a matter of course.

The reason for setting the pyrolysis temperature and the pyrolysis time of the waste maggot is that the pyrolysis is too slow and the yield is lowered and the energy efficiency is lowered at 600 ° C or more and for 35 minutes or more.

Of course, it is preferable that the conveyor 46 is constituted of a screw conveyor as possible in consideration of heat loss of the waste paper.

The second fusing unit 50 is a second pyrolysis unit for secondly pyrolyzing the waste charcoal which is first pyrolyzed by the first fusing unit 40 and is conveyed through the conveyor 56. The waste charcoal is heated at a temperature of 600 to 900 占 폚 For a period of 25 to 35 minutes.

Particularly, it is preferable that the second fusing unit 50 is formed as a rotary kiln so that the waste paper pulp is evenly dried while rotating.

The second fusing unit 50 includes a burner 52 for supplying a heat source required for thermal decomposition of the waste charcoal yarn and a heat exchanger 54 for uniformly maintaining the internal temperature of the second fusing unit 50 It is a matter of course.

The reason for setting the drying temperature and the drying time of the second fusing unit 50 is that the drying time is long and the yield is lowered at a temperature of less than 600 ° C. and less than 25 minutes. This is because the second fibrillating unit 50 has no smell.

At this time, the pyrolysis temperature and the pyrolysis time of the waste chrysanthemum are set because the pyrolysis is too slow to lower the yield, and the energy efficiency decreases more than 900 ° C and 35 minutes or more.

Of course, the conveyor 56 is preferably a screw conveyor in consideration of thermal damage of the waste paper.

The cooler 60 is a device for receiving and cooling a product that is pyrolyzed by the second fusebox 50 and falls through the conveyor 66. The conveyor 72 ) To the storage tank 70. [

In addition, the cooler 60 is preferably configured to perform the cooling function by injecting air blown from the cooler 62 into the blower 64. [

Of course, the conveyor 66 is preferably a screw conveyor in consideration of thermal damage of the waste paper, and the conveyor 72 is preferably a bucket conveyor capable of taking into consideration the conveying efficiency of the regeneration molding sand.

Hereinafter, the operation according to the present invention will be described.

First, when the waste chopper delivered by the feeder 80 is charged into the crusher 10, the crushed product is crushed by the crusher 10, and then the iron powder is removed by the de-ironer 20, (30).

In this way, the waste charcoal dried by the dryer 30 is sequentially pyrolyzed through the first and second fryers 40 and 50, and then cooled while passing through the cooler 60, And stored.

At this time, since the dryer 30, the first firing unit 40, the second firing unit 50, and the cooler 60 are configured in a laminated manner along the vertical direction, Space is minimized.

Further, since the dryer 30, the first firing unit 40, the second firing unit 50, and the cooler 60 are rotated, the area due to thermal contact of the wastepaper is increased to oxidize the impurities Efficiency is maximized.

In addition, since the dryer 30, the first firing unit 40, the second firing unit 50, and the cooler 60 are configured in a laminated manner, the leakage of the heat source .

Particularly, by appropriately adjusting the temperatures of the dryer 30, the first firing unit 40, and the second firing unit 50, particle cleavage and carbonization generated during the firing process of the wastepaper can be prevented, .

Description of the Related Art [0002]
10: crusher 12: hopper
14, 16: Crusher 18: Screen
20: deaerator 30: dryer
32: Conveyor 34: Surgeon
40: First burner 42: Burner
44: Heat exchanger 46: Conveyor
50: second burner 52: burner
54: heat exchanger 56: conveyor
60: cooler 62: cooler
64: blower 70: storage tank
72: Conveyor 80: Feeder

Claims (6)

A crusher (10) for crushing the waste sand;
A deaerator (20) for removing the iron powder of the crushed waste paper crushed by the crusher (10);
A rotary dryer 30 for heating and drying the crushed material passed through the de-ironing machine 20;
A rotary type first firing unit (40) for heating the dried material dried by the dryer (30) to pyrolyze impurities;
A rotary second firing unit 50 for heating and re-pyrolyzing the fired product pyrolyzed by the first firing unit 40; And
And a rotary cooler (60) for receiving and cooling the fired product in which the impurities are pyrolyzed by the second firing unit (50)
The dryer 30, the first firing unit 40, the second firing unit 50, and the cooler 60 are interconnected along the vertical direction through respective conveyors 46, 56, 66, Lt; / RTI >
The dryer (30) is dried at a temperature of 250 to 350 캜 for 25 to 35 minutes,
The first firing unit 40 is fired in a temperature range of 300 to 600 DEG C for 25 to 35 minutes,
Wherein the second firing unit (50) is fired in a temperature range of 600 to 900 占 폚 for 25 to 35 minutes.
The recycling apparatus of claim 1, wherein the de-ironing unit (20) is magnetic.
The recycling apparatus of claim 1, wherein the first and second fryers (40, 50) are rotary kilns.
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KR1020160018261A 2016-02-17 2016-02-17 Apparatus for recycling moulding sand KR101853330B1 (en)

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CN109128026A (en) * 2018-10-11 2019-01-04 嵊州市华明机械铸造股份有限公司 A kind of method of iron ball casting
KR20230087199A (en) 2021-12-09 2023-06-16 안하영 Composition For Treatment or improving condition of aphthous stomatitis,cancer therapy-induced oral mucositis

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100941027B1 (en) * 2009-03-24 2010-02-05 한국지질자원연구원 The regenerating method of scrap casting sand

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100941027B1 (en) * 2009-03-24 2010-02-05 한국지질자원연구원 The regenerating method of scrap casting sand

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