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Cast aluminum inorganic used sand regeneration and reusing combined method

It is an old sand regeneration and inorganic technology, which is applied in the cleaning/processing machinery, casting molds, casting molding equipment, etc. of casting materials to achieve the effects of prolonging the service life, uniform heating, and avoiding poor fluidity

Active Publication Date: 2020-08-07
HEFEI RENCHUANG CASTING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the characteristics of inorganic old sand, the present invention provides a thermal method combined with ultrasonic regeneration process and reclaimed sand recycling method, which not only solves the environmental protection problem of solid waste generated by inorganic old sand, but also realizes the reuse of old sand to reduce production costs and provide Enterprises create direct benefits

Method used

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  • Cast aluminum inorganic used sand regeneration and reusing combined method
  • Cast aluminum inorganic used sand regeneration and reusing combined method
  • Cast aluminum inorganic used sand regeneration and reusing combined method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A. Inorganic old sand regeneration

[0043] The old inorganic sand is crushed by the drum to below 20 meshes, and sent to the old inorganic sand silo; the old inorganic sand is transported from the silo to the horizontal roasting furnace through the bucket elevator for roasting; the roasting temperature is set at 500°C, and the roasting time is 3 hours; The roasted sand is cooled by an inclined cooling tank, the cooling tank is inclined downward along the flow direction of the sand, and the inclination angle is 5°. There is a circulating water pipe at the bottom of the cooling tank to cool the sand to 100-200 °C; The cooling tank enters the rain-type lower sand port, and then falls vertically into the trough-type ultrasonic water tank for wet regeneration. The ultrasonic water tank is 2m in height, 1m in length, and 1m in width. , the height of the solution in the ultrasonic water tank is no more than 4 / 5 of the height of the water tank, including 98% of water, 1.3% of ...

Embodiment 2

[0047] A. Inorganic old sand regeneration

[0048] The old inorganic sand is crushed by a drum to below 20 mesh, and sent to the old inorganic sand silo; the old inorganic sand is transported from the silo to the horizontal roasting furnace through the bucket elevator for roasting; the roasting temperature is set at 800°C, and the roasting time is 5 hours; The roasted sand is cooled by an inclined cooling tank, the cooling tank is inclined downward along the flow direction of the sand, and the inclination angle is 10°. There is a circulating water pipe at the bottom of the cooling tank to cool the sand to 100-200 ° C; the sand enters the rain from the cooling tank The sand mouth is lowered in a vertical manner, and then vertically falls into the trough-type ultrasonic water tank for wet regeneration. The ultrasonic water tank has a height of 5m, a length of 0.5m, and a width of 0.5m. The ultrasonic waves are placed on the side of the water tank. The height of the solution in t...

Embodiment 3

[0052] A. Inorganic old sand regeneration

[0053] The old inorganic sand is crushed by the drum to below 20 mesh, and sent to the old inorganic sand silo; the old inorganic sand is transported from the silo to the horizontal roasting furnace through the bucket elevator for roasting; the roasting temperature is set at 300°C, and the roasting time is 0.5h The roasted sand is cooled by an inclined cooling tank, the cooling tank is inclined downward along the flow direction of the sand, the inclination angle is 2°, and a circulating water pipe is installed at the bottom of the cooling tank to cool the sand to 100-200°C; the sand enters the rain from the cooling tank The shower-type lower sand mouth, and then vertically fall into the trough-type ultrasonic water tank for wet regeneration. The ultrasonic water tank has a height of 1m, a length of 2m, and a width of 2m. The ultrasonic waves are placed on the side of the water tank. The height of the solution in the water tank does n...

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Abstract

The invention provides a cast aluminum inorganic used sand regeneration and reusing combined method. The solid waste environmental problem caused by inorganic used sand is solved, meanwhile, recyclingof the used sand is achieved, the production cost is reduced, and direct benefits are created for an enterprise. According to the technical scheme, the cast aluminum inorganic used sand regenerationand reusing combined method comprises regeneration of the inorganic used sand and reusing of the inorganic used sand, wherein regeneration of the inorganic used sand comprises the steps of crushing, hot-method regeneration, chilling, wet-method regeneration, dehydration, drying, sieving and the like; and the reusing method comprises the steps of adding, stirring and mixing inorganic powder, inorganic adhesives, methylsilicone oil, sodium hydroxide and the like.

Description

technical field [0001] The invention relates to the technical field of metal sand casting, in particular to a combined regeneration and reuse method of aluminum casting inorganic old sand. Background technique [0002] Inorganic sand is a kind of foundry sand based on modified water glass and added with powder reinforcing agent. Compared with organic resin sand, due to its low gas generation and odorless, it has been gradually introduced to the market and is regarded as a new generation of environmentally friendly foundry sand. Inorganic sand has the characteristics of excellent formability and good collapse at 700°C, and is mainly used in the production of precision aluminum alloy castings, such as aluminum alloy automobile engine cylinder heads. At present, my country will consume millions of tons of inorganic sand every year, and with the accelerated promotion of green factories, more and more old inorganic sand will be produced. Recycling this kind of waste sand can not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C5/08B22C5/06B22C5/04B22C5/00B22C1/02
CPCB22C1/02B22C5/00B22C5/04B22C5/0409B22C5/06B22C5/08
Inventor 包羽冲尹海军冯俊龙刘栋李卓情
Owner HEFEI RENCHUANG CASTING MATERIAL CO LTD
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