Silicate inorganic binder for casting and method for preparing silicate inorganic binder for casting

An inorganic binder and silicate technology, which is applied in the field of foundry sand bonding materials, can solve the problems of poor storage resistance of molding sand, difficulty in recycling old sand, and reduced bonding strength, and achieves low gas evolution. , low cost, easy regeneration and recycling

Active Publication Date: 2013-10-16
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molding sand cast with sulfate-based inorganic binders has problems such as low strength and high casting defect rate; the mold sand casted with phosphate-based inorganic binders has problems such as poor moisture resistance and short service life, while water glass and modified The molding sand of water glass casting is superior to the former two in terms of strength, precision, production efficiency and environmental protection, so water glass and modified water glass are mostly used as molding sand binders in casting
However, due to the poor aging resistance of water glass and modified water glass, the bond strength is reduced, and the molded sand has poor storage resistance, poor applicability, poor moisture resistance, poor collapsibility, and poor core making. Problems such as low efficiency and difficulty in regeneration and reuse of old sand

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The composition raw material of present embodiment silicate inorganic binder is as follows:

[0021] Sodium metasilicate nonahydrate: 90.1g

[0022] Boric acid: 5.6g

[0023] Sodium tripolyphosphate: 1.4g

[0024] Citric acid: 2.9g

[0025] The preparation method of present embodiment silicate inorganic binder:

[0026] Step 1: Take 90.1 g of sodium metasilicate nonahydrate, stir and heat to boiling;

[0027] Step 2: Add 5.6g of boric acid, 1.4g of sodium tripolyphosphate and 2.9g of citric acid into the reaction kettle, stir evenly and continue heating until the system is clear and transparent.

[0028] Add 60g of silicate inorganic binder to 2kg of 70 / 100 mesh standard sand, and add 12g of curing crosslinking agent. The content of each component in the curing crosslinking agent is: silicon dioxide 92%, aluminum oxide 1.2%, ferric oxide 1.0%, magnesium oxide 0.8%, calcium oxide 0.4%, sodium oxide 1.1% and water 3.5%, at 160 ℃, heat curing for 2 minutes, the measur...

Embodiment 2

[0030] The composition raw material of present embodiment silicate inorganic binder is as follows:

[0031] Sodium metasilicate octahydrate: 85g

[0032] Boric acid: 8g

[0033] Sodium tripolyphosphate: 2g

[0034] Sucrose: 5g

[0035] The preparation method of present embodiment silicate inorganic binder:

[0036] Step 1: Take 85g of sodium metasilicate octahydrate and add it to the reaction kettle, stir evenly and heat to boiling;

[0037] Step 2: Add 8g of boric acid, 2g of sodium tripolyphosphate and 5g of sucrose into the reaction kettle, stir evenly and continue heating until the system is clear and transparent

[0038] Add 60g of silicate inorganic binder to 2kg of 70 / 100 mesh standard sand, and add 12g of curing crosslinking agent. The content of each component in the curing crosslinking agent is: silicon dioxide 75%, aluminum oxide 1.2%, ferric oxide 1.2%, magnesium oxide 0.8%, calcium oxide 0.4%, sodium oxide 1.5% and water 19.9%, under the condition of 160 ℃, t...

Embodiment 3

[0040] The composition raw material of present embodiment silicate inorganic binder is as follows:

[0041] Sodium metasilicate hexahydrate: 87g

[0042] Boric acid: 7g

[0043] Sodium tripolyphosphate: 1.7g

[0044] Sorbitol: 4.3g

[0045] The preparation method of present embodiment silicate inorganic binder:

[0046] Step 1: Add 87g of sodium metasilicate hexahydrate into the reaction kettle, stir evenly and heat to boiling;

[0047] Step 2: Add 7g of boric acid, 1.7g of sodium tripolyphosphate and 4.3g of sorbitol into the reaction kettle, stir evenly and continue heating until the system is clear and transparent.

[0048] Add 60g of silicate inorganic binder to 2kg of 70 / 100 mesh standard sand, and add 12g of curing crosslinking agent. The content of each component in the curing crosslinking agent is: silicon dioxide 96%, aluminum oxide 0.8%, ferric oxide 0.6%, magnesium oxide 0.6%, calcium oxide 0.2%, sodium oxide 1.1% and water 0.7%, at 160 ℃, heat curing for 2 min...

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
flexural strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a silicate inorganic binder for casting and a method for preparing the silicate inorganic binder for casting. The silicate inorganic binder for casting consists of crystalline water-contained sodium metasilicate, boric acid, sodium tripolyhosphate and an organic modifier. The silicate inorganic binder for casting is high in binding property, long in storage time, nontoxic and harmless and low in cost; the inorganic binder prepared by the method is high in wettability and binding property; and the molding sand made by the silicate inorganic binder is high in flowability, low in gas forming property, long in storage time and high in applicability, and the old sand can be recycled.

Description

technical field [0001] The invention relates to a casting sand bonding material, in particular to a silicate inorganic bonding agent for casting and a preparation method thereof. Background technique [0002] At present, casting sand binders include organic and inorganic. Since organic binders are mostly resins, because they are organic polymers, in the casting production process, from sand mixing, core making, pouring, cleaning The disposal of waste sand will have adverse effects on the human body and the environment. In addition, most resins are petroleum derivatives, which are non-renewable resources and costly. The inorganic binders are mostly sulfates, phosphates, water glass, and modified water glass modified on the basis of medium and high modulus water glass. However, the molding sand cast with sulfate-based inorganic binders has problems such as low strength and high casting defect rate; the mold sand casted with phosphate-based inorganic binders has problems such...

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): C04B12/04
Inventor 熊鹰
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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