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Preparation method of high-temperature volume-stable riser material

A technology with stable volume and riser, applied in glass manufacturing equipment, spinning solution preparation, manufacturing tools, etc., can solve the problems of lower casting process yield, lower mechanical properties of castings, poor volume stability, etc., to prolong solidification time, Improved yield and good chemical corrosion resistance

Inactive Publication Date: 2017-08-04
CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: Aiming at the defects that the existing riser material has poor volume stability in high temperature state, shrinkage defects are easy to appear at high temperature, reduces the yield of casting process, and leads to the decline of mechanical properties of castings, a high temperature riser material is provided. Preparation method of volume stable riser material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] First, in parts by weight, weigh 45 parts of deionized water, 10 parts of tetraethyl orthosilicate, 3 parts of aluminum nitrate and 1 part of aluminum isopropoxide in a beaker. After heating in a water bath at 45°C for 3 hours, statically Set for 6 hours to prepare the precursor sol, place the precursor sol in the electrospinning device, adjust the angle of the injector of the electrospinner to 60°, control the receiving distance to 10cm, and the relative humidity to 50%, then apply a voltage of 15kV, and Set the feed rate to 0.3mL / h, electrospin to obtain spun fibers, dry the spun fibers at 55°C for 6 hours to obtain dry mullite fibers, and place the dried mullite fibers at 80°C In the furnace, the temperature was raised to 450°C at a heating rate of 8°C / min, and after heat preservation and calcination for 3 hours, the calcined modified mullite fiber was prepared, and the magma rock was washed and dried in the air, and ground at 350r / min Pass through a 100-mesh sieve, ...

example 2

[0017] First, weigh 48 parts of deionized water, 13 parts of tetraethyl orthosilicate, 4 parts of aluminum nitrate and 1 part of aluminum isopropoxide in a beaker, and heat it in a water bath at 48°C for 4 hours, then statically Set for 7 hours to prepare the precursor sol, place the precursor sol in the electrospinning device, adjust the angle of the electrospinner injector to 60°, control the receiving distance to 13cm, and the relative humidity to 50%, then apply a voltage of 15kV, and Set the feed rate to 0.3mL / h, electrospin to obtain spun fibers, dry the spun fibers at 58°C for 7 hours to obtain dry mullite fibers, and place the dried mullite fibers at 90°C In the furnace, the temperature was raised to 500°C at a heating rate of 8°C / min, and after heat preservation and calcination for 4 hours, the calcined modified mullite fiber was prepared, and the magma rock was washed and dried in the air, and ground at 375r / min Pass through a 110-mesh sieve, take the magma rock powd...

example 3

[0019]First, in parts by weight, weigh 50 parts of deionized water, 15 parts of tetraethyl orthosilicate, 5 parts of aluminum nitrate and 2 parts of aluminum isopropoxide in a beaker. After heating in a water bath at 50°C for 5 hours, statically Set for 8 hours to prepare the precursor sol, place the precursor sol in the electrospinning device, adjust the angle of the electrospinner injector to 60°, control the receiving distance to 15cm, and the relative humidity to 50%, then apply a voltage of 15kV, and Set the feed rate to 0.3mL / h, electrospin to obtain spun fibers, dry the spun fibers at 60°C for 8 hours to obtain dry mullite fibers, and place the dried mullite fibers at 100°C In the furnace, the temperature was raised to 550°C at a heating rate of 8°C / min, and after heat preservation and calcination for 5 hours, the calcined modified mullite fiber was prepared, and the magma rock was washed and dried in the air, and ground at 400r / min Pass through a 120-mesh sieve, take t...

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Abstract

The invention discloses a preparation method of a high-temperature volume-stable riser material and belongs to the technical field of casting techniques. The method comprises the steps of firstly preparing a precursor sol from tetraethoxysilane and aluminum nitrate; preparing a spinning fiber from the precursor sol through an electrostatic spinning device and carrying out drying and calcining treatment to obtain a calcined modified mullite fiber; cleaning and airing magmatite, grinding, sieving, collecting magmatite powder, smelting and carrying out drawing treatment by using a glass rod to obtain molten magmatite silk, cooling to obtain a magmatite fiber; and carrying out mixed-grinding on the magmatite fiber, magnesium oxide and the calcined modified mullite fiber, mixing with magnesium chloride and carrying out sinter molding to obtain the high-temperature volume-stable riser material. The prepared riser material has the characteristics of being excellent in thermal insulation property, good in volume stability in a high-temperature state, stable in chemical property and convenient in aftertreatment, the yield of a cast part can be effectively improved and the mechanical property of the cast part can be improved.

Description

technical field [0001] The invention discloses a method for preparing a high-temperature volume-stable riser material, which belongs to the technical field of casting. Background technique [0002] In the production of castings, defects such as shrinkage porosity, shrinkage cavity, and slag inclusion of castings are a major problem restricting the production of castings. It directly affects the internal quality of castings and the process yield, and the process yield is a factor that affects the cost of castings. Important technical indicators. The feeding technology is an important factor that directly affects the yield of the casting process. [0003] Due to the liquid shrinkage and solid shrinkage of castings during the solidification process, in order to ensure that the castings obtain a dense structure, in the production process of the castings, it is necessary to ensure that the feeding channel is unblocked and ensure sufficient liquid steel replenishment during the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/04C03B37/02D01D1/02D01D5/00
CPCC03B37/0203C04B35/04C04B35/66C04B2235/3418C04B2235/444C04B2235/522C04B2235/5228D01D1/02D01D5/0061D01D5/0076D01D5/0092Y02P40/57
Inventor 刘叶王艳芹孙冬
Owner CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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