Thermal regeneration method of silicate inorganic coating wet state waste sand

A silicate and heat regeneration technology, which is applied in the cleaning/processing machinery of casting mold materials, casting molding equipment, metal processing equipment, etc., can solve the problems of waste of resources, difficulty in regeneration and reuse of silicate waste sand, etc. , to achieve good processing effect

Active Publication Date: 2018-11-02
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a thermal regeneration method of silicate-based inorganic coated wet sa

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  • Thermal regeneration method of silicate inorganic coating wet state waste sand

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Example Embodiment

[0020] Example 1

[0021] A method for thermally regenerating silicate-based inorganic film-coated wet waste sand, comprising the following steps:

[0022] (1) Sieve the waste sand after crushing, so that the metal scrap content in the waste sand is below 0.15%, and the waste sand is air-selected to remove dust, so that the fine powder content in the waste sand is below 5%; The screened waste sand is milled, and the milling time is 45s; after the milling process, a spiral scrubbing machine is used to carry out water separation and dust removal treatment on the waste sand.

[0023] (2) Put the waste sand processed through step (1) into the roasting furnace, control the particle size of the waste sand and the flow rate added, control the particle size of the waste sand less than 6 mesh, and control the flow rate of the waste sand at 35Kg / min; the temperature in the roasting zone of the roasting furnace is controlled at 450°C, and the waste sand reaches the bottom of the furnac...

Example Embodiment

[0025] Example 2

[0026] A method for thermally regenerating silicate-based inorganic film-coated wet waste sand, comprising the following steps:

[0027] (1) Sieve the waste sand after crushing, so that the metal scrap content in the waste sand is below 0.15%, and the waste sand is air-selected to remove dust, so that the fine powder content in the waste sand is below 5%; The screened waste sand is milled, and the time for the milling process is 20s; after the milling process, a spiral scrubbing machine is used to carry out water separation and dust removal treatment on the waste sand.

[0028] (2) Put the waste sand processed through step (1) into the roasting furnace, control the particle size of the waste sand and the flow rate added, control the particle size of the waste sand less than 6 mesh, and control the flow rate of the waste sand at 50Kg / min; the temperature in the roasting area of ​​the roasting furnace is controlled at 480°C, and the waste sand reaches the bo...

Example Embodiment

[0030] Example 3

[0031] A method for thermally regenerating silicate-based inorganic film-coated wet waste sand, comprising the following steps:

[0032] (1) Sieve the waste sand after crushing, so that the metal scrap content in the waste sand is below 0.15%, and the waste sand is air-selected to remove dust, so that the fine powder content in the waste sand is below 5%; The screened waste sand is milled, and the milling time is 60s; after the milling process, a spiral scrubbing machine is used to carry out water separation and dust removal treatment on the waste sand.

[0033] (2) Put the waste sand processed through step (1) into the roasting furnace, control the particle size of the waste sand and the flow rate added, control the particle size of the waste sand less than 6 mesh, and control the flow rate of the waste sand at 38Kg / min; the temperature in the roasting zone of the roasting furnace is controlled at 430°C, and the waste sand reaches the bottom of the furnac...

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Abstract

The invention belongs to the technical field of mold casting sand core materials, and particularly discloses a thermal regeneration method of silicate inorganic coating wet state waste sand. The thermal regeneration method comprises the following steps that the waste sand is crushed and then sieved, the metal filing content in the waste sand is below 0.15%, the waste sand is subjected to air separation for dust removal, and the fine powder content in the waste sand is below 5%; the waste sand is placed in a roaster, and the particle size of the waste sand is controlled to be less than 6 mesh,and the flow rate of the waste sand is controlled at 20-80Kg/min; and the temperature at a roasting area of the roaster is controlled at 400-500 DEG C, the waste sand is subjected to heat preservationfor 1-2h after reaching the bottom of the roaster, and sand release is performed. Through the treatment of the thermal regeneration method, the silicate waste sand can be effectively reclaimed and reused, and the problems of environmental pollution and waste of resources caused by direct discharge is solved.

Description

technical field [0001] The invention belongs to the technical field of mold casting sand core materials, and in particular relates to a thermal regeneration method of silicate inorganic coated wet sand waste. 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. Compared with organic resin binders, silicate binders do not produce toxic gases during the application process. Today, with increasingly stringent environmental protection standards, silicate type sand is considered to be the most likely type of molding sand to achieve green casting. [0003] However, the silicate type sand has the problem of being difficult to regenerate and reuse, resulting in a large amount of waste silicate sand, which not only brings serious pollution to the environment, but also causes a great waste of resources. There are many regeneration and recovery meth...

Claims

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Application Information

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IPC IPC(8): B22C5/00B22C5/04B22C5/10B22C5/06
CPCB22C5/00B22C5/04B22C5/06B22C5/10
Inventor 熊帆熊鹰霍文会
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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