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A method for recycling silicate-based inorganic film-coated wet waste sand

A silicate and inorganic technology, which is applied in the recycling field of silicate-based inorganic coated wet waste sand, can solve the problems of waste of resources, difficulty in regeneration and reuse of silicate-based waste sand, etc., and achieve less water consumption , Strengthen cleaning effect, good treatment effect

Active Publication Date: 2019-11-22
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for recycling silicate-based inorganic film-coated wet waste sand to solve the problem that silicate-based waste sand is difficult to regenerate and reuse, resulting in waste of resources

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  • A method for recycling silicate-based inorganic film-coated wet waste sand

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Effect test

Embodiment 1

[0027] A method for recycling silicate-based inorganic film-coated wet waste sand, comprising the following steps:

[0028] (1) The silicate waste sand is crushed after magnetic separation, and then screened with a 6-mesh sieve, and the sand blocks with a size of 6 mesh or more are crushed again; the surface of the waste sand that is qualified for crushing is rubbed and milled, The rubbing and grinding treatment time is 30-50s; after rubbing and milling, the dust and particles less than or equal to 200 meshes are screened to remove dust and particles, and then wind separation is used to remove dust, using the wind generated by the high-speed flow relative to the surface of the waste sand during sorting. The shear force and friction force will peel off the fine adherents on the surface of the waste sand, and at the same time, the surface of the waste sand particles will be purified by the relative displacement of the particles under the buoyancy of the winnowing wind force, and ...

Embodiment 2

[0034] A method for recycling silicate-based inorganic film-coated wet waste sand, comprising the following steps:

[0035](1) The silicate waste sand is crushed after magnetic separation, and then screened with a 6-mesh sieve, and the sand blocks with a size of 6 mesh or more are crushed again; the surface of the waste sand that is qualified for crushing is rubbed and milled, The rubbing and grinding treatment time is 50-70s; after rubbing and milling, the dust and particles less than or equal to 200 meshes are screened to remove dust and particles, and then the dust is removed by winnowing. The shear force and friction force will peel off the fine adherents on the surface of the waste sand, and at the same time, the surface of the waste sand particles will be purified by the relative displacement of the particles under the buoyancy of the winnowing wind force, and the force generated by the surface collision and friction;

[0036] (2) The waste sand after step (1) is mixed a...

Embodiment 3

[0041] A method for recycling silicate-based inorganic film-coated wet waste sand, comprising the following steps:

[0042] (1) The silicate waste sand is crushed after magnetic separation, and then screened with a 6-mesh sieve, and the sand blocks with a size of 6 mesh or more are crushed again; the surface of the waste sand that is qualified for crushing is rubbed and milled, The rubbing and grinding treatment time is 25-50s; after rubbing and milling, the dust and particles less than or equal to 200 meshes are screened to remove dust and particles, and then wind separation is used to remove dust, using the wind generated by the high-speed flow relative to the surface of the waste sand during sorting. The shear force and friction force will peel off the fine adherents on the surface of the waste sand, and at the same time, the surface of the waste sand particles will be purified by the relative displacement of the particles under the buoyancy of the winnowing wind force, and ...

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Abstract

The invention belongs to the technical field of mold casting sand core materials and particularly discloses a recycling method of silicate inorganic precoated wet state waste sand. The recycling method comprises the following steps of 1, conducting mechanical regeneration treatment on the silicate waste sand; 2, mixing the waste sand with cleaning fluid, conducting stirring, so that a water-sand body is formed, and conducting first-level ultrasonic treatment on the water-sand body for 1-60 minutes, wherein the mass part ratio of the waste sand to the cleaning fluid is 1: (0.5-3), the frequencyof ultrasonic waves ranges from 28 Hz to 48 Hz, the ultrasonic intensity for treating each kilogram of the waste sand ranges from 0.1 kw to 0.5 kw, and the cleaning fluid is an aqueous solution containing inorganic acid with the concentration mass ratio being 0.1-5% and surfactant with the concentration mass ratio being 0.005-0.01%; 3, separating the waste sand obtained after ultrasonic treatmentfrom the cleaning fluid; 4, conducting second-level ultrasonic treatment on the sand obtained after separation; and 5, separating the sand obtained after second-level ultrasonic treatment from wastewater, and drying the sand. By means of the method, after being regenerated, the silicate waste sand can be reused so that the effects that discharging of the waste sand is reduced, and resource wasteis reduced can be achieved.

Description

technical field [0001] The invention belongs to the technical field of mold casting sand core materials, and in particular relates to a recycling method of silicate inorganic coated wet waste sand. Background technique [0002] As an inorganic chemical binder, silicate has a wide range of sources, low price, non-toxic and tasteless, and is currently widely used in the foundry industry. The traditional silicate binder basically uses a single silicate as a component (with a modulus between 1.6 and 2.8) as a binder for foundry sand, and binds this type of silicate during molding. The agent is mixed with the original sand, and then carbon dioxide is blown to the core body to achieve solidification. With the development of modification technology, a new type of silicate binder that is cured by adding organic esters to this type of binder has emerged, and it has developed to a lower modulus of silicate (modulus 1.6) as the basis. Components are modified by adding a variety of in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C5/00
CPCB22C5/00
Inventor 熊帆熊鹰霍文会
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP