Special runner pipe for casting and preparation method thereof

A sprue tube, a special technology, applied in casting molding equipment, applications, casting molds, etc., can solve the problems that are not suitable for high-end casting, pottery tubes are not suitable for high-end casting, and the refractoriness is not high

Active Publication Date: 2017-11-03
BAOJI HUAGUANG CASTING MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main problems in the actual use of the existing pottery pipes are: adhesion, delamination, cracking, low refractoriness, etc., and it is precisely because of these problems that the existing pottery pipes are hardly suitable for high-end casting
[0006] Another main reason that causes the main problem of existing ceramic tubes and is not suitable for high-end casting is the high porosity and uneven distribution of pores
This factor directly leads to low bulk density, low mechanical strength, poor peeling resistance and thermal shock resistance of the product.

Method used

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  • Special runner pipe for casting and preparation method thereof
  • Special runner pipe for casting and preparation method thereof

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preparation example Construction

[0036] A method for preparing a special sprue pipe for casting, comprising the following steps:

[0037] 1. The bauxite raw material and the bonded clay green crucible are respectively crushed to pass through a 100-mesh sieve;

[0038] 2. Heat the crushed bauxite raw meal to 900-1100°C and keep it warm for 4-5 hours to prepare bauxite light burnt material;

[0039] 3. According to Al in the target product 2 o 3 The mass percentage is 56-60%, SiO 2 The formula is designed with a mass percentage of 30-34%, and the bauxite light burnt material and green crucible clay are respectively weighed and mixed to obtain a mixture;

[0040] 4. Carry out dry co-grinding of the mixture with a Raymond mill, pass the co-grinding material through a 200-mesh sieve and electromagnetically remove iron to obtain the batch material;

[0041] 5. Use the obtained batch materials to rough mud for 1 or 2 times with a mud refining machine. The mud is stale for at least one week after rough refining;...

Embodiment 1

[0049] 1. The bauxite raw material and the bonded clay green crucible are respectively crushed to pass through a 100-mesh sieve;

[0050] 2. Heat the crushed bauxite raw meal to 1000°C and keep it warm for 4 hours to prepare bauxite light burnt material;

[0051] 3. According to Al in the target product 2 o 3 56.8% by mass, SiO 2 The mass percentage is 32% ratio design formula, and take by weighing bauxite light burnt material and green crucible clay respectively, mix and obtain mixture;

[0052] 4. Carry out dry co-grinding of the mixture with a Raymond mill, pass the co-grinding material through a 200-mesh sieve and electromagnetically remove iron to obtain the batch material;

[0053] 5. Use the obtained batch materials to rough mud for 2 times with a mud refining machine. After rough refining, the mud is stale for a week;

[0054] 6. Refining the stale mud with a vacuum mud refining machine, and then extruding it with a pipe extruder to shape it. For thick-walled tub...

Embodiment 2

[0061] 1. The bauxite raw material and the bonded clay green crucible are respectively crushed to pass through a 100-mesh sieve;

[0062] 2. Heat the crushed bauxite raw meal to 900°C and keep it warm for 5 hours to prepare bauxite light burnt material;

[0063] 3. According to Al in the target product 2 o 3 56% by mass, SiO 2 The mass percentage is 34% ratio design formula, and take by weighing bauxite light burnt material and green crucible clay respectively, mix and obtain mixture;

[0064] 4. Carry out dry co-grinding of the mixture with a Raymond mill, pass the co-grinding material through a 200-mesh sieve and electromagnetically remove iron to obtain the batch material;

[0065] 5. Use the obtained batch materials to rough mud for 2 times with a mud refining machine. After rough refining, the mud is old for 10 days;

[0066] 6. Refining the stale mud with a vacuum mud refining machine, and then extruding it with a pipe extruder to shape it. For thick-walled tubes, ...

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Abstract

The invention discloses a special runner pipe for casting and a preparation method thereof. The preparation method comprises the following steps: using bauxite as a high-aluminum raw material and green crucible as bonding clay; firstly lightly sintering the raw bauxite material, then designing a formula according to a ratio that the mass percent of Al2O3 is 56-60% and the mass percent of SiO2 is 30-34%, weighing the lightly sintered bauxite material and the green crucible clay respectively, mixing and co-grinding; coarsely pugging, aging, finely pugging in vacuum, performing injectable tube extrusion moulding, and drying a co-ground material, and finally sintering at the temperature of 1250-1300 DEG C. A ceramic product prepared by the preparation method of the invention has an orange yellow appearance, high compactness and high mechanical strength; detection shows that a main crystal phase is a mullite phase with good crystal development and a minor crystal phase is a corundum phase, so that various requirements on a high-end casting runner pipe are met.

Description

technical field [0001] The invention belongs to the field of refractory materials for metal casting, and in particular relates to a special sprue pipe for casting and a preparation method thereof. Background technique [0002] Refractories are basic materials in the field of thermal engineering, and are widely used in cement, glass, ceramics, metal smelting and other industries. In iron and steel smelting, in addition to using refractory materials in smelting high-temperature furnaces, a refractory sprue tube is also used in casting, which is usually called ceramic sprue tube or pottery tube. This sprue tube is actually an intermediate product between refractory materials and ceramics: if it is called refractory material, it is prepared according to the firing process of ceramics; if it is called ceramics, the selection and use of raw materials are different. Fully compliant with refractory materials. Therefore, this sprue tube is actually a special refractory ceramic spru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185C04B35/622C04B38/00B22C9/08
CPCB22C9/082C04B35/185C04B35/622C04B35/66C04B38/00C04B2235/3217C04B2235/349C04B2235/656C04B38/0074
Inventor 张新平张超武
Owner BAOJI HUAGUANG CASTING MATERIAL TECH
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