Unlock instant, AI-driven research and patent intelligence for your innovation.

Refractory material prepared from investment casting waste sand and preparation method of refractory material

A refractory material, investment casting technology, applied in the field of refractory material manufacturing, to achieve the effect of promoting circular low-carbon economy, saving mineral resources, and excellent performance

Inactive Publication Date: 2019-08-23
启东市聚旺铸造有限公司
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, one of the objectives of the present invention is to provide a refractory material prepared by using investment casting waste sand and a method for preparing the refractory material, so as to solve the recycling problem of investment casting waste 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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The invention provides a kind of preparation method of refractory material, and this preparation method comprises the following steps:

[0023] (1) Crushing 60 to 70 parts by weight of investment casting waste sand into 5 to 10 mm, magnetically separated and then sieving and sorting; wherein, the chemical composition of the investment casting waste sand is: SiO2 53.39%, Al2O3 36.84%, Fe2O3 1.56%, CaO 0.3%, MgO0.23%, K2O 0.27%, Na2O 0.02%, TiO2 1.06%, ZrO2 6.17%;

[0024] (2) Mix the investment casting waste sand after the above-mentioned treatment in step (1) with 14 to 20 parts by weight of magnesia-aluminum spinel with a particle size of ≤3mm, and use absolute ethanol as the medium, and mix in a planetary ball mill 3.5 to 4.5 hours, the rotation speed is 300r / min, forming a slurry, wherein the composition of the magnesium aluminum spinel is MgO+Al2O3≥90%;

[0025] (3) Add 5 to 6 parts by weight of carbon nanotubes and 2 to 3 parts by weight of polyvinyl alcohol into ...

Embodiment 1

[0038] In this embodiment, the refractory material is prepared by the following method steps:

[0039] (1) Crushing 65 parts by weight of investment casting waste sand into 5-10 mm, magnetic separation and then screening and sorting;

[0040] (2) Mix the investment casting waste sand after the above-mentioned treatment in step (1) with 15 parts by weight of magnesia-alumina spinel with a particle size ≤ 3mm, and use absolute ethanol as the medium, and mix in a planetary ball mill for 3.5~ 4.5 hours, rotating speed is 300r / min, forms slurry;

[0041] (3) Add 5 parts by weight of carbon nanotubes and 3 parts by weight of polyvinyl alcohol to the slurry, and ultrasonically disperse it in an ethanol solution with a mass concentration of 8-10% for 1.5-2 hours; then, under the condition of circulating hot air drying, and then heat-treating at a temperature of 450-550° C. for 3-4 hours to obtain the first mixture;

[0042] (3) After the first mixture is cooled and dedusted, it is m...

Embodiment 3

[0054] In this embodiment, the refractory material is prepared by the following method steps:

[0055] (1) Crushing 60 parts by weight of investment casting waste sand to 5-10mm, magnetically separating and then screening and sorting;

[0056] (2) Mix the investment casting waste sand after the above-mentioned treatment in step (1) with 20 parts by weight of magnesium-aluminum spinel with a particle size ≤ 3mm, and use absolute ethanol as the medium, and mix in a planetary ball mill for 3.5- 4.5 hours, rotating speed is 300r / min, forms slurry;

[0057] (3) Add 6 parts by weight of carbon nanotubes and 2 parts by weight of polyvinyl alcohol to the slurry, and ultrasonically disperse it in an ethanol solution with a mass concentration of 8-10% for 1.5-2 hours; then, under the condition of circulating hot air drying, and then heat-treating at a temperature of 450-550° C. for 3-4 hours to obtain the first mixture;

[0058] (3) After the first mixture is cooled and dedusted, it i...

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
particle sizeaaaaaaaaaa
lengthaaaaaaaaaa
flame retardantaaaaaaaaaa
Login to View More

Abstract

The invention discloses a refractory material prepared from investment casting waste sand and a preparation method of the refractory material. The preparation method comprises the following steps: (1)crushing the investment casting waste sand, and performing magnetic selection; (2) mixing the investment casting waste sand obtained after the treatment in the step (1) with magnesium aluminum spinel, adopting anhydrous ethanol as a medium, and performing mixing in a ball mill so as to form slurry; (3) adding carbon nanotubes and polyvinyl alcohol to the slurry, performing ultrasonic dispersion,then performing drying, and then carrying out heat treatment so as to obtain a first mixture; (4) adding modified water glass to the first mixture, and conducting stirring so as to form a second mixture; (5) adding a binder, an admixture and an oxidizing agent to the second mixture, performing discharge, performing molding, and carrying out drying for 10-15 hours; and (6) heating the dried moldedmaterial to a high temperature of 1450 DEG C so as to obtain the refractory material. Through the refractory material, the problem of recycling and utilization of the investment casting waste sand inthe prior art can be solved.

Description

technical field [0001] The invention belongs to the technical field of refractory material manufacturing, and in particular relates to a refractory material prepared by using investment casting waste sand and a preparation method of the refractory material. Background technique [0002] The mold shell material of investment casting is a refractory material. In investment casting, the mold shell must have high temperature resistance, thermochemical stability, and suitable thermal expansion performance. The air permeability and shelling performance must meet the performance requirements of the casting. These requirements for the formwork need to be realized by the refractory material used to manufacture the formwork. [0003] In the prior art, a large amount of waste sand is excluded in the investment casting process, which directly affects the energy consumption of casting production, environmental pollution, and the quality, production efficiency and cost of castings. At th...

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 Applications(China)
IPC IPC(8): C04B35/66C04B35/622C04B35/64
CPCC04B35/62204C04B35/64C04B35/66C04B2235/3201C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3222C04B2235/3418C04B2235/3427C04B2235/3821C04B2235/3826C04B2235/3873C04B2235/401C04B2235/402C04B2235/5288C04B2235/6562C04B2235/6567
Inventor 范洪雷薛锋锋
Owner 启东市聚旺铸造有限公司