Method and device for peeling off attachments on surfaces of waste casting sands

A technology of waste sand and binder, which is applied to the cleaning/processing machinery of casting materials, casting molding equipment, metal processing equipment, etc. The effect of economic and environmental benefits

Inactive Publication Date: 2014-11-26
雷士文
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The reality is that the regenerated sand obtained by the existing old sand treatment methods cannot meet the requirements for the use of the inner

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for peeling off attachments on surfaces of waste casting sands
  • Method and device for peeling off attachments on surfaces of waste casting sands

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] Industrial-grade sodium hydroxide is used to prepare an aqueous solution with a free alkalinity of 0.1 mol / L. After soaking the waste alkali phenolic resin sand, the slag ash falling off is separated by a water flow cyclone, and the obtained pure sand is dehydrated by a centrifuge and dried naturally. Use reclaimed sand to test the tensile strength according to "Testing Methods for Foundry Sand and Mixtures (GB / T 2684)" with alkali phenolic resin binder.

Example Embodiment

[0024] Example 2

[0025] Use industrial-grade potassium hydroxide to prepare an aqueous solution with a free alkalinity of 0.2mol / L, soak the waste alkali phenolic resin and dewater it with a high-frequency vibrating screen, dry the sand with a dryer, and then separate the fallen ash with a winnowing equipment . Use reclaimed sand to test the tensile strength according to "Testing Methods for Foundry Sand and Mixtures (GB / T 2684)" with alkali phenolic resin binder.

Example Embodiment

[0026] Example 3

[0027] Industrial-grade sodium hydroxide is used to prepare an aqueous solution with a free alkalinity of 0.4 mol / L. After soaking the waste water glass sand, the slag ash falling off is separated by a water flow cyclone. The pure sand obtained is dehydrated by a centrifuge and dried naturally. Use reclaimed sand to test the tensile strength according to the test method of foundry sand and mixture (GB / T 2684) with modified water glass binder.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method and device for peeling off the attachments on the surfaces of waste casting sands. The method is characterized in that sands are soaked in a water solution with a certain alkalinity to remove the attachments from the surfaces of the sands without using a machinery friction method or a high temperature burning method to remove the attachments on the sand surfaces so as to completely recycle the waste casting sands, and during the process no waste is generated. The basic operations of the technology device comprise: soaking to remove the attachments, slag ash separation, dehydration drying, and circulation water filtering.

Description

technical field [0001] The invention discloses a method and an implementation device for peeling off the bonded matter on the surface of the waste sand grains of the casting mold. "Sand grains" as used herein includes quartz sand, chromite sand, ceramic grains and other ore grains. The term "stickers" here includes cured (hardened) resins, dehydrated water glass, inorganic salt minerals and metal oxides. Background technique [0002] There are many types of existing foundry sand regeneration treatment devices, but the methods used can be classified as mechanical friction and heating. The types of mechanical friction include: direct friction, such as patent announcement CN 101868310 B; friction in airflow, such as patent announcement CN 102655964 A; friction in water flow, such as patent announcement CN 102615243 A. The heating type includes: high-temperature heating that burns out organic components, such as patent announcement CN 2859431 Y; heating first and then heatin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22C5/00
Inventor 雷士文
Owner 雷士文
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap