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

Lightweight refractory material with thermal insulation function for aluminum processing and casting

A refractory material and aluminum processing technology, applied in the field of light-weight thermal insulation functional refractory materials for aluminum processing, melting and casting, can solve the problems of damage, peeling, inclusion of aluminum melt, high cost, and achieve excellent erosion resistance, good heat insulation, good strength effect

Inactive Publication Date: 2021-08-06
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the melting and casting process of aluminum deep processing, it is necessary to apply a wide variety of lightweight thermal insulation functional parts, such as diverter plates for melting and casting, standpipes, diversion pipes, floats, distribution launders, transfer sleeves, sprue cups for low-pressure casting, heat sinks, etc. Functional refractory devices such as adapter plates for the top; most of these refractory functional devices are made of aluminum silicate fiber and ceramic powder plus a binder, rammed or machine-pressed, and the surface is smeared with 1-2mm thick ceramic slurry to harden and strengthen. temperature heat treatment; this method has many manufacturing processes, low efficiency, and the dimensional accuracy of the product is not high, and further processing is required in occasions with high dimensional requirements; in addition, the aluminum silicate functional parts prepared by this method, the surface hardened layer It is quite different from the base material, and it is prone to cracks due to thermal shock during use, and then it will be damaged and peeled off by erosion, bringing new inclusions to the aluminum melt, and the service life is short
Some manufacturers also use fused silica castables to make such functional parts, but there are disadvantages such as poor thermal insulation effect and long demoulding production time.
At the same time, some light-weight castables are also used to make such functional parts, but the strength of light-weight castables is mostly too low, and they are easily peeled off and damaged during the scouring process of the aluminum melt, causing inorganic inclusions, polluting the aluminum melt, and affecting product quality.
At the same time, aluminum titanate and high-density silicon-calcium materials can also directly process various functional devices, but there is a problem of high cost, especially when the size is relatively complicated, and even mass production cannot be achieved because of the high cost.

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

[0019] 1. The solid raw materials and mass parts of the ceramic slurry are respectively 400g of 200 mesh corundum fine powder, 50g of d50=1um alumina fine powder, 50g of xonotlite whiskers, 300g of ceramic fibers with a length of 0.5~3mm, pure Calcium aluminate cement 200g.

[0020] 2. Weigh 450g of silica sol, 2g of PAC, and 4g of ammonium polyacrylate, stir well, and make a solvent for later use.

[0021] 3. Add the materials in step "1" to the solvent described in step "2", and add them while stirring (pure calcium aluminate cement is added last), after stirring evenly, pour into the mold for casting.

[0022] 4. Demould after standing for 1~2h, curing for 4h, drying at 60°C×8h~110°C×8h, heat treatment at 750°C×2h, and then the splitter plate for aluminum processing and casting can be obtained.

Embodiment 2

[0024] 1. The solid raw materials and mass parts of the ceramic slurry are respectively 350g of 325 mesh quartz fine powder, 80g of barium sulfate micropowder with d50=5um, 70g of xonotlite whiskers, 200g of ceramic fibers with a length of 0.5-3mm, Pure calcium aluminate cement 300g.

[0025] 2. Weigh 350g of silica sol, 1g of CMC, and 8g of ammonium polyacrylate, stir well, and make a solvent for later use.

[0026] 3. Add the materials in step "1" to the solvent described in step "2", and add them while stirring (pure calcium aluminate cement is added last), after stirring evenly, pour into the mold for casting.

[0027] 4. Demould after standing for 1~2h, curing for 4h, drying at 60°C×8h~110°C×8h, heat treatment at 750°C×2h, and the casting tube for aluminum processing and casting can be obtained.

Embodiment 3

[0029] 1. The solid raw materials and mass parts of the ceramic slurry are respectively 380g of 200 mesh calcium silicate mineral fiber powder, 60g of alumina micropowder with d50=2.3um, 60g of xonotlite whiskers, and ceramics with a length of 0.5~3mm. Fiber 250g, pure calcium aluminate cement 250g.

[0030] 2. Weigh 400g of silica sol, 1.5g of CMC, and 6g of ammonium polyacrylate, stir well, and make a solvent for later use.

[0031] 3. Add the materials in step "1" to the solvent described in step "2", and add them while stirring (pure calcium aluminate cement is added last), after stirring evenly, pour into the mold for casting.

[0032] 4. Demould after standing for 1~2h, cured for 4h, dried at 60°C×8h~110°C×8h, heat treated at 750°C×2h, and then the guide tube for aluminum processing and casting can be obtained.

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 belongs to the technical field of aluminum processing and casting, and relates to a lightweight refractory material with thermal insulation function for aluminum processing and casting. The material can be prepared by casting molding of ceramic slurry, whiskers and chopped ceramic fibers are added into the ceramic slurry, the curing reaction adopts the combined action of an inorganic cementing material and silica sol cross-linked gel, and a product biscuit prepared by the process method is high in strength, short in demolding time and accurate in size, and can meet the molding manufacturing of various complex special-shaped functional devices. Therefore, the method is an effective way for rapidly, simply and low-cost obtaining of various special-shaped functional devices for aluminum processing and casting, the obtained product also has good heat insulation property, strength, erosion resistance and scouring resistance, and a good use effect is achieved in aluminum casting sections of related manufacturers.

Description

technical field [0001] The invention belongs to the technical field of aluminum processing melting and casting refractory materials, and relates to a light-weight heat-preserving functional refractory material for aluminum processing and casting. Background technique [0002] In the melting and casting process of aluminum deep processing, it is necessary to apply a wide variety of lightweight thermal insulation functional parts, such as diverter plates for melting and casting, standpipes, diversion pipes, floats, distribution launders, transfer sleeves, sprue cups for low-pressure casting, heat sinks, etc. Functional refractory devices such as adapter plates for the top; most of these refractory functional devices are made of aluminum silicate fiber and ceramic powder plus a binder, rammed or machine-pressed, and the surface is smeared with 1-2mm thick ceramic slurry to harden and strengthen. temperature heat treatment; this method has many manufacturing processes, low effic...

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): C04B35/66C04B35/80C04B35/101B28B1/14B28B1/52
CPCC04B35/66C04B35/101C04B35/14C04B35/16B28B1/14B28B1/52C04B2235/5276C04B2235/448C04B2235/5228C04B2235/96
Inventor 王冬冬王自强余同暑陈卢周慧君郭鹏
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES