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Precision casting waste sand reusing method

A technology of precision casting and waste sand, which is applied in the direction of casting molding equipment, manufacturing tools, solid waste management, etc., can solve the problems of precision casting waste sand polluting the environment, so as to promote circular low-carbon economy, save mineral resources, and promote health The effect of development

Active Publication Date: 2010-10-27
泰州枫叶冶金设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned defects, the technical problem to be solved in the present invention is to provide a method for reusing precision casting waste sand in view of the existing problem of polluting the environment by waste precision casting sand

Method used

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  • Precision casting waste sand reusing method
  • Precision casting waste sand reusing method
  • Precision casting waste sand reusing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1

[0018] After washing and drying the waste sand of precision casting, it is crushed by a jaw crusher, and screened for later use after iron removal. Then carry out batching according to the particle gradation shown in Table 1, and add silica micropowder, pure calcium aluminate cement and sodium tripolyphosphate. Finally, mix and homogenize to obtain qualified refractory castables.

[0019] Table 1

[0020]

[0021] Take the refractory castable of this example, add 6% tap water and mix evenly, make a refractory castable test block through a vibrating table, and naturally cure it at room temperature, and then test its related properties. The results are shown in Table 2.

[0022] Table 2

[0023]

Embodiment 2

[0025] After washing and drying the waste sand of precision casting, it is crushed by a jaw crusher, and screened for later use after iron removal. Then carry out batching according to the particle gradation shown in Table 3, and add silicon micropowder, pure calcium aluminate cement and sodium lignosulfonate (F10). Finally, mix and homogenize to obtain qualified refractory castables.

[0026] table 3

[0027]

[0028] Take the refractory castable of this example and add 7% tap water to mix evenly, make a refractory castable test block through a vibrating table, and naturally cure it at room temperature, and then test its related properties. The results are shown in Table 4.

[0029] Table 4

[0030]

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Abstract

The invention relates to the waste reusing technology, in particular to a precision casting waste sand reusing method. The precision casting waste sand contains mullite, mullite sand, zirconite and zircon sand. The precision casting waste sand is cleaned, dried, crushed and screened to form aggregate and powder for a fireproof casting material; and a bonding agent and an admixture are added into the aggregate and the powder, and the components are mixed and homogenized to form the fireproof casting material. The method solves the problem that the conventional precision casting waste sand pollutes the environment.

Description

technical field [0001] The invention relates to waste recycling technology, in particular to a method for recycling waste sand of precision casting. Background technique [0002] According to statistics, every ton of qualified castings produced in my country produces 1.3 to 1.5 tons of waste sand, and the annual discharge of foundry waste sand in the country is more than 10 million tons. The current treatment method is random stacking or landfill, which not only pollutes the environment, but also causes a great waste of resources. In 1995, the state promulgated the Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste (revised for the first time in December 2004) to encourage and support scientific research and technological development in the prevention and control of environmental pollution by solid waste. It is required to take measures to prevent scattering, loss, leakage or other environmental pollution of various...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/04C04B18/14C04B35/66B22C5/00B09B3/00
CPCY02W30/91
Inventor 唐惠东肖雪军鞠宇飞叶希李龙珠蒋恒蔚孔凡宝侯林燕
Owner 泰州枫叶冶金设备有限公司
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