Method for preparing casting-use water glass by using casting waste sand

A technology for casting waste sand and water glass, which is used in foundry molding equipment, machinery for cleaning/processing mold materials, molds, etc., to achieve the effect of saving silica sand resources, reducing mining, significant economic value and social value

Active Publication Date: 2013-03-20
SHENYANG HYATON FOUNDRY MATERIAL
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this process still produces 15%-20% waste sand, about 30000 t molding sand is

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 for preparing casting-use water glass by using casting waste sand
  • Method for preparing casting-use water glass by using casting waste sand
  • Method for preparing casting-use water glass by using casting waste sand

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1

[0048] The chemical composition of waste sand using ester hardened sodium silicate sand is: SiO 2 : 82.1%, CH 3 COO Na: 11%, CH 3 COO K: 2.9%, others: 4.0%.

[0049] Soda ash is industrial secondary soda ash, Na 2 CO 3 The content is 98.5%.

[0050] Feeding quality ratio: 60% waste sand, 40.% soda ash, mix with a mixer, add the horseshoe flame caustic soda kiln with a feeder at a feed rate of 35 Kg per minute, heat with gas, and control the furnace temperature at 1380- At 1420℃, the charge melts and reacts to produce sodium silicate and potassium silicate. Water flows from the discharge port to chill, granulate, lift, dehydrate, and package to obtain mixed solid sodium silicate and potassium silicate water glass. Its chemical composition For: SiO 2 : 66.00%, Na 2 O: 29.70%, K 2 O: 1.10%, others: margin.

[0051] Denoted as M2.2.

Example Embodiment

[0052] Example 2

[0053] The chemical composition of waste sand using ester hardened sodium silicate sand is: SiO 2 : 90%, CH 3 COO Na: 7.0%, CH 3 COO K: 1.8%, others: 1.2%.

[0054] Soda ash is industrial grade one soda ash, Na 2 CO 3 The content is 99%.

[0055] Feeding quality ratio: 62.5% of waste sand, 37.5% of soda ash, mix with a mixer, add the horseshoe flame soda kiln with a feeder at a feed rate of 35 Kg per minute, heat with natural gas, and control the furnace temperature at 1380- At 1420℃, the charge melts and reacts to produce sodium silicate and potassium silicate. Water flows from the discharge port to chill, granulate, lift, dehydrate, and package to obtain a mixed solid sodium silicate and potassium silicate water glass, its chemical composition For: SiO 2 : 71.02%, Na 2 O: 27.36%, K 2 O: 0.68%, others: margin. Recorded as M2.6.

Example Embodiment

[0056] Example 3

[0057] The chemical composition of waste sand using ester hardened sodium silicate sand is: SiO 2 : 95%, CH 3 COO Na: 3.5%, CH 3 COO K: 1.0%, others: 0.5%.

[0058] Soda ash is industrial grade one soda ash, Na 2 CO 3 The content is 99%.

[0059] Feeding mass ratio: waste sand 66.2%, soda ash 33.8%, mix well with a mixer, add the horseshoe flame caustic soda kiln with a feeder at a feed rate of 35 Kg per minute, heat with gas, and control the furnace temperature at 1380-1420 ℃, the charge melts and reacts to produce sodium silicate and potassium silicate, and water flows from the discharge port to chill, granulate, lift, dehydrate, and package to obtain a mixed solid water glass of sodium silicate and potassium silicate. Its chemical composition is :SiO 2 : 75.41%, Na 2 O: 23.81%, K 2 O: 0.38%, others: margin.

[0060] Recorded as M3.1.

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 relates to a method for preparing casting-use water glass by using casting waste sand. Casting waste sand produced during ester-hardened water glass sand process and soda ash are prepared into sodium silicate and potassium silicate; sodium silicate and potassium silicate mixture particles, sodium hydroxide, potassium hydroxide, water, and a modifying agent are mixed according to a ratio requirement; steam with a pressure of 0.6-0.8MPa is delivered in; a temperature is maintained for 1-4h at 158-169 DEG C; and sodium silicate and potassium silicate are dissolved in water; and the mixture is well mixed, such that the casting-use water glass is obtained. A method for carrying our shaping and core-making by using the casting-use water glass as an adhesive comprises the steps that: washed silica sand, artificial silica sand, shaped silica sand, zircon sand, or regenerated old sand thereof are adopted as main raw materials; a CO2 blowing hardening method, an ester hardening method, or the like is adopted as a hardening process. The method provided by the invention has high actual operation performance, and has predictable substantial economic value and social value.

Description

technical field [0001] The invention relates to the technical field of molding materials for casting technology in the equipment manufacturing industry, and in particular provides a method for manufacturing water glass for casting by using foundry waste sand. Background technique [0002] The equipment manufacturing industry is a pillar industry in my country, and castings are the basic parts of the equipment manufacturing industry. In 2010, the output of castings in my country was 36.5 million tons. With the development of the equipment manufacturing industry, the output of castings in my country has increased year by year, and the demand for casting binders has increased simultaneously. Binders for casting include: resinous organic binders, water glass and other inorganic binders. The price of artificial synthetic resin has increased significantly with the price increase of materials and energy, which has reduced the profit of casting production. Resin binder is used in c...

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): B22C5/00B22C1/18
Inventor 金广明余明伟
Owner SHENYANG HYATON FOUNDRY MATERIAL
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