Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Regeneration process of resin sand for casting

A casting resin and process technology, which is applied in the field of casting resin sand regeneration technology, can solve the problems of poor quality of recycled sand, and achieve the effects of ensuring emission, improving heat treatment effect, and low emission

Active Publication Date: 2022-01-25
HUHANG TECH GRP CO LTD
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, in view of the above-mentioned problems, the present invention provides a resin sand regeneration process for foundry, which mainly solves the problem of poor quality of regenerated sand in the prior art

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
  • Regeneration process of resin sand for casting
  • Regeneration process of resin sand for casting
  • Regeneration process of resin sand for casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0022] Embodiments of the invention are:

[0023] A resin sand regeneration process for foundry, comprising the following steps:

[0024] 1) molding sand crushing;

[0025] 2) Flatten the old sand that has been crushed to form granules on the conveyor belt on the conveying device and transport it through a magnetic field with a magnetic field strength of 1.2T;

[0026] 3) putting the old sand treated in step 2) into a solution with a pH value of 4.7 for soaking and ultrasonic treatment;

[0027] 4) putting the old sand treated in step 3) into a roasting furnace with a temperature of 870° C. for 4 hours;

[0028] 5) After gradually lowering the temperature of the roasting furnace to 250°C, take out the old sand and soak it in the cooling liquid for rapid cooling, and then put it into the potassium hydroxide solution;

[0029] 6) Take out the old s...

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

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a resin sand regeneration process for foundry, which mainly solves the problem of poor quality of regenerated sand in the prior art, and comprises the following steps: crushing the molding sand; flattening the crushed old sand in granular form on a conveying device Transport the magnetic field with a magnetic field strength of 1.0T to 1.2T on the conveyor belt; put the old sand treated in step 2 into a solution with a pH value of 4.3 to 5.2 and soak it in an ultrasonic treatment; Put the sand into a roasting furnace with a temperature of 820°C to 870°C for 3 to 4 hours; gradually lower the temperature of the roasting furnace to 230°C to 250°C, take out the old sand and soak it in the cooling liquid for rapid cooling, and then put it Put it into the potassium compound solution; take out the old sand to air dry or dry it, put it into the wasting machine, the temperature of the inner cavity of the wasting machine is maintained at 610 ° C ~ 620 ° C, and the impurities attached to the old sand are separated from the old sand through the waste machine ; The sand processed in step 6 is washed, filtered and dried to form regenerated sand.

Description

technical field [0001] The invention relates to a resin sand regeneration process for casting. Background technique [0002] my country is a big country in the foundry industry. Foundry companies use and consume many sand molds every year. Sand molds are generally made by adding adhesive, raw sand, and curing agent to the sand mixer according to a certain ratio, and continuously mixing them through the sand mixer. Molding sand, reusing molding sand for molding or core making. Sand molds will produce a lot of old sand after use. Our country produces more than 50 million tons of used casting sand every year. Many companies directly bury the old sand and discard it. There is a lack of recycling of used sand. [0003] The existing medium-sized molding sand in the foundry industry usually uses resin sand. Resin sand refers to molding sand or core sand that uses artificial resin as the binder of sand grains. , the resin undergoes an irreversible cross-linking reaction and solidif...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B22C5/00B22C5/04B22C5/06B22C5/08
CPCB22C5/00B22C5/04B22C5/06B22C5/08
Inventor 陈思良陈锵黄书彬黄种友陈丽端
Owner HUHANG TECH GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products