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Surface layer refractory material of precision casting wax model

A technology of refractory materials and wax molds, applied in the field of refractory materials, can solve the problems of poor natural high-grade ore, poor particle shape leveling, large fluctuations in impurity content, etc., to achieve less sticky sand, small linear expansion coefficient, and fast drying speed Effect

Active Publication Date: 2021-02-19
梅河口市德成耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of lack of natural high-grade ore used in refractory materials, large expansion coefficient of existing refractory materials, small thermal conductivity, low refractoriness, large fluctuations in impurity content, high low-melt content, poor particle shape leveling, The problem of high price of zircon sand, but to provide a refractory material

Method used

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  • Surface layer refractory material of precision casting wax model
  • Surface layer refractory material of precision casting wax model
  • Surface layer refractory material of precision casting wax model

Examples

Experimental program
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Effect test

Embodiment 1

[0033]Example 1 Electric arc furnace for producing the refractory material of the wax mold

[0034]SeePicture 9, The electric arc furnace that produces the surface refractory material of the precision casting wax mold, which includes: furnace, furnace lining, electrode, arcing rod 2, arcing coke 3;

[0035]The bottom 4 of the furnace is dish-shaped (the electrode circle area at the bottom of the furnace), the arcing rod 2 is placed in a star shape, the star point is the arcing coke 3, and the other end of the arcing rod 2 is connected with three electrodes (electrode A, electrode B, electrode C) Connected; the arcing rod 2 is a carbon rod, and the electrode is a graphite electrode.

Embodiment 2

[0036]Example 2 Preparation of surface refractory material of precision casting wax mold

[0037]1) Proportion: the raw material uses Al with a content of ≥99%2O3 (Industrial alumina), 99% SiO2(Vined quartz), ZrO content>66%2(Zircon sand); according to the mass fraction of raw materials Al2O380%, SiO215%, ZrO2 5% for uniform mixing;

[0038]2) Smelting: use electric arc furnace smelting, the smelting process is: before opening the furnace, first trim the bottom electrode circle area into a dish to facilitate the melting of the furnace; use three carbon rods at the bottom of the furnace to form a three-phase electrode Corresponding star shape, after the electrode and the carbon rod are compacted, place 1kg of carbon particles at the star point, and then put 200kg of alumina powder on the carbon particles to facilitate the smooth melting into a molten liquid after power transmission; wait until the current rises to normal After the value (1000kva transformer voltage 180V current 3200A. 1500...

Embodiment 3

[0045]Example 3 Preparation of surface refractory material of precision casting wax mold

[0046]1) Proportion: the raw material uses Al with a content of ≥99%2O3 (Industrial alumina), 99% SiO2(Vined quartz), ZrO content>66%2(Zircon sand); according to the mass fraction of raw materials Al2O385%, SiO211%, ZrO2 4% for uniform mixing;

[0047]2) Smelting: Smelting with pouring furnace, the smelting process is: Before starting the furnace, first cultivate the bottom electrode circle area, to facilitate the concentration of the furnace melt; use three carbon rods in the bottom of the furnace and three-phase electrode The corresponding star, the electrode is placed at 1kg of carbon particles at the star to the carbon rod, and then put 200 kg of alumina powder above the carbon particles, so that it can smoothly melt to melt after power generation; to be currently rising to normal After the value, step 1) is mixed with a slow input. After normal condition is normal, press the set feed speed timi...

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Abstract

The invention discloses a refractory material for the surface layer of a precision casting wax model, which is prepared by the following method: by mass percentage, industrial alumina is 75-85%, vein quartz is 11-18%, and zircon sand is 3-6%. %, mixed evenly, smelted, crushed, and ground in a three-phase star-shaped electric arc furnace at 2100~2300 °C; due to the reasonable design of ingredients, the main crystal phase is approximately round granular corundum and mullite in continuous distribution; the corundum crystal size is about Between 30 and 120 microns; in addition to the two main crystal phases, there is also a small amount of glass phase and a small amount of zirconia; easy to release the mold, no bonding, less sand sticking, which ensures the smoothness of precision casting products; the specific gravity is 3.l0g / cm 3 ; The thermal conductivity is large, and the coefficient of linear expansion is small, which is 5×10 ‑6 ; Reduce the deformation of the formwork, cracks, cracking.

Description

Technical field[0001]The invention belongs to the technical field of refractory materials, and specifically relates to a surface layer refractory material of a precision casting wax mold.Background technique[0002]Refractory materials have many varieties and different purposes. It is necessary to scientifically classify refractory materials for scientific research, rational selection and management; there are many classification methods for refractory materials, which are classified according to chemical mineral composition: 1) siliceous refractories; 2) Aluminum silicate refractories; 3) Magnesium refractories; 4) Dolomite refractories; 5) Carbon composite refractories; 6) Zirconium-containing refractories; 7) Special refractories; however, the expansion coefficient of existing refractories Larger, low thermal conductivity, low refractoriness, large fluctuations in impurity content, high low melt content, poor particle shape and leveling, and high price of zircon sand;[0003]At the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/3248C04B2235/3418C04B2235/77C04B2235/9607
Inventor 刘德成黄文博
Owner 梅河口市德成耐火材料有限公司
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