Straight hole ceramic filter used for cast steel and high temperature alloy

A technology of ceramic filter and high-temperature alloy, which is applied in the field of industrial ceramics and silicate materials, can solve the problems of large filtering area, limited application, complicated manufacturing process, etc., and achieve good thermal shock resistance and good filtering function.

Active Publication Date: 2014-05-21
JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The filter has a high porosity, a large effective filtration area, a large casting flow rate, and can effectively reduce eddy currents. However, the product has a single appearance and hole type, and the applicable temperature is only for filtering molten iron at a pouring temperature below 1500 ° C. It is not suitable for high temperature Filtration of molten metal liquid for higher molten steel and superalloy liquid
Chinese patent publication CN101745912B discloses a preparation method of a straight-hole filter. The patent adopts a molding method, the manufacturing process is complicated, the product opening rate is low, and it cannot be used for the filtration of molten steel and superalloy liquid, which limits its application.
In short, for the straight-hole ceramic filter, there is no report on the straight-hole filter for filtering superalloy liquid or cast steel liquid.

Method used

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  • Straight hole ceramic filter used for cast steel and high temperature alloy
  • Straight hole ceramic filter used for cast steel and high temperature alloy
  • Straight hole ceramic filter used for cast steel and high temperature alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The straight hole ceramic filter is 75mm*75mm*20mm in size, the hole type is 2.5mm*2.5mm square hole, and the rib thickness is 0.7mm. The weight ratio of cooked coke gems (particle size less than 200 mesh), alumina (particle size less than 325 mesh), clay (particle size less than 500 mesh) and talc (particle size less than 500 mesh) after ball milling and sieving is 50: The raw materials of 45:3:2 were mixed into 200Kg, plus 6% hydroxypropyl methylcellulose of the raw material weight, ball milled for 2 hours, after passing through a 100 mesh sieve, adding 20% ​​water of the total weight of raw materials, 3% tung oil and 3 % rapeseed oil, kneaded in a kneader for 20 minutes, aged for 18-24 hours after being muddled three times by a mud trainer, and the aged mud was extruded from the corresponding mold of the above-mentioned filter after being muddled in a vacuum. After being shaped by a box-type microwave oven, the extruded body is dried with circulating warm air in a bo...

Embodiment 2

[0043] The size of the straight hole ceramic filter is 100mm*60mm*20mm, the hole type is a hexagonal hole with an inscribed circle diameter of Φ2.5mm, and the rib thickness is 0.8mm. Calcined kaolin (particle size less than 200 mesh), alumina (particle size less than 300 mesh), clay (particle size less than 500 mesh) and talc (particle size less than 500 mesh) with a weight ratio of 35:60:2:3 Mix the raw materials into 200Kg, add 6% hydroxypropyl methylcellulose of the raw material weight, ball mill for 2 hours, pass through a 100-mesh sieve, add 18% water and 6% high-quality soybean oil of the total weight of the raw materials, and knead in a kneader After 20 minutes, after 3 times of mud refining by the mud refining machine, it will be aged for 18-24 hours. After the aged mud is subjected to vacuum refining, it will be extruded by the corresponding mold of the above-mentioned filter. After the extruded body is shaped by a box-type microwave oven, it is dried with circulating...

Embodiment 3

[0045] The straight hole ceramic filter is 100mm*100mm*25mm, the hole type is 3.8mm round hole, and the rib thickness is 0.8mm. Use super-grade boiled gemstones (particle size less than 200 mesh), calcined kaolin (particle size less than 200 mesh), alumina (particle size less than 300 mesh), clay (particle size less than 500 mesh), talc (particle size less than 500 mesh) , andalusite (particle size less than 500 mesh) raw materials with a weight ratio of 15:15:60:2:3:5 are mixed into 200Kg, plus 6% hydroxypropyl methylcellulose of raw material weight, ball milled for 2 hours, passed After a 100-mesh sieve, add 18% water and 6% hydraulic oil of the total weight of the raw materials, and knead in a kneader for 20 minutes. After 3 times of mud refining, it will be stale for 18-24 hours. The stale mud will be vacuum-trained After mud, select the corresponding mold of the above-mentioned filter to extrude. After being shaped by a box-type microwave oven, the extruded body is dried...

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Abstract

The invention relates to a straight hole ceramic filter used for cast steel and high temperature alloy. The straight hole ceramic filter comprises 65 to 85% of Al2O3, 11 to 33% of SiO2, 1 to 3% of MgO, and 1.5% or less of other alkali metal oxides. Crystalline phase of the straight hole ceramic filter preferably comprises 40 to 90% of mullite, 5 to 55% of corundum, 8% or less of quartz, and 5% or less of glass phase. The straight hole ceramic filter is low in cost, and is capable of tolerating fast (straight) washing of high temperature molten steel with a temperature of 1650 DEG C or high temperature alloy liquid.

Description

technical field [0001] The invention belongs to the field of silicate materials and industrial ceramics, and in particular relates to a straight-hole ceramic filter for filtering impurities in liquid metals such as molten steel and high-temperature alloys in a casting process. Background technique [0002] The purification of molten metal plays an important role in improving the mechanical properties of castings. Therefore, filtration technology is particularly important in the purification of molten metal. At present, the filter device used for the purification of molten metal is a ceramic filter, which can effectively intercept harmful impurities in the molten metal and change the molten metal from turbulent flow to laminar flow, playing the role of purification and homogenization. According to the structure, ceramic filters can be divided into foam ceramic filters and straight hole ceramic filters. Almost all of the current filters for cast steel are ceramic foam filters...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B01D39/20
Inventor 祝建勋李顺
Owner JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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