A method for regenerating sand for large steel castings and high temperature resistant coated sand prepared from the regenerated sand
A technology for steel castings and reclaimed sand, which is applied to the cleaning/processing machinery of casting materials, casting molding equipment, cores, etc. It can solve the problems of single used sand and the inability to completely remove the surface substances of mixed used sand, etc. Achieve the effect of realizing recycling, increasing removal ratio and accelerating sedimentation speed
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0068] ﹝Preparation method of high temperature resistant coated sand﹞
[0069] The invention also relates to high temperature resistant coated sand prepared from the regenerated sand, and the preparation method includes the following steps: preheating the regenerated sand to 120-150° C., then adding it to a sand mixer, and adding phenolic resin, sludge, silane coupling Aqueous agent, urotropine aqueous solution and calcium stearate are mixed uniformly, and coated sand is obtained after cooling.
[0070] In one embodiment of the present invention, the high temperature resistant coated sand is prepared by the following steps:
[0071] [1] Screening the obtained regenerated sand, the purpose is to remove the impurity particles and obtain the finished regenerated sand;
[0072] [2] After heating the finished reclaimed sand to 120-150℃ by a batch heater, put it into the coated sand mixer;
[0073] [3] Add phenolic resin to the coated sand mixer and stir for 20-50s;
[0074] [4] ...
Embodiment 1
[0078] (1) Mixed used sand regeneration and sludge collection
[0079] ① The mixed old sand core is crushed by the roller, and the particle size of the obtained mixed old sand is less than 20 meshes, and it is sent to the old sand silo.
[0080] ②The mixed old sand is lifted from the silo to the ultrasonic washing area through the bucket. The ultrasonic water tank is cylindrical, with a diameter and height of 2m. There are 20 ultrasonic vibrators inside, and the ultrasonic frequency is 40KHz. A stirring rotor is set in the center of the ultrasonic water tank, and the rotation frequency is 120r / min. A sand-water mixture was obtained after the ultrasonic washing was completed.
[0081] ③ Send the sand-water mixture to the dewatering screen for sand-water separation to obtain sewage and sand.
[0082] ④ The obtained sewage enters the reaction tank, and polyacrylamide with a sewage quality of 0.4‰ and polyaluminum chloride with a sewage quality of 4.0‰ are added to the tank to f...
PUM
Property | Measurement | Unit |
---|---|---|
thickness | aaaaa | aaaaa |
thickness | aaaaa | aaaaa |
thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com