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Straight hole ceramic filter

A ceramic filter, filter technology, applied in the field of silicate materials and industrial ceramics, can solve problems such as product introduction

Active Publication Date: 2015-04-29
JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Straight-hole ceramic filter is a new type of ceramic filter developed in recent years. It has the characteristics of good appearance regularity, high strength in cold and hot states, good thermal shock resistance, and low production cost. However, the main application of straight-hole ceramic filters is It is used in the filtration of impurities in low-melting liquid metals such as molten iron, aluminum alloy, copper and its alloys, and in the filtration of high-temperature molten metals such as cast steel, and no related products have come out

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0044] Preparation materials: zirconia corundum brick polishing waste (1000 mesh, zirconia content ≥ 12%, alumina content ≥ 60%) 170 kg, corundum powder (325 mesh, alumina content ≥ 99%, corundum phase content ≥ 95%) 20 Kg, Suzhou kaolin (500 mesh, alumina content ≥30%, silica content ≥45%) 10 kg, polyvinyl alcohol (PVA content ≥6%) aqueous solution 10 kg, emulsified paraffin (commercially available industrial grade) 1.5 kg , sodium tripolyphosphate (commercially available industrial grade) 0.7 kg, add 120 kg of water, ball mill for 6 hours, and prepare slurry;

[0045] Pressure spray granulation: adopt the pressure spray granulation equipment introduced in patent 200810182753.3, the spray pressure is controlled at 1.2MPa, the nozzle diameter is 1.2mm, the water content of the obtained granulated material is controlled at 2-4%, and the bulk density of the granulated material is 0.95-1.1 g / cm 3 ;

[0046] Compression molding: Put the above powder into a mold cavity with a dia...

Embodiment 2

[0050] The straight hole ceramic filter is 75mm*75mm*20mm in size, the hole type is 3.0mm*3.0mm square hole, and the rib thickness is 1.0mm. Raw materials with a weight ratio of zirconium corundum brick polishing waste (particle size less than 1000 mesh), alumina (particle size less than 325 mesh), and Suzhou kaolin (particle size less than 500 mesh) after ball milling and sieving Mixed into 200Kg, add 4% hydroxypropyl methylcellulose of raw material weight, mix for 2 hours, after crossing 100 mesh sieves, add water of 18% of raw material gross weight, 3% tung oil and 3% rapeseed oil, knead Knead in the machine for 20 minutes, and then seal and stale for 18-24 hours after the mud is practiced 3 times by the mud refining machine. After the stale mud is subjected to vacuum refining, it is extruded with 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 warm air in a box-type oven at 6...

Embodiment 3

[0052] Materials: zirconium corundum brick polishing waste (1000 mesh, zirconia content ≥ 12%, alumina content ≥ 60%) 190 kg, Suzhou kaolin (500 mesh, alumina content ≥ 30%, silica content ≥ 45% ) 10 kg, polyvinyl alcohol (PVA content ≥ 6%) aqueous solution 10 kg, emulsified paraffin (commercially available industrial grade) 1.5 kg, sodium tripolyphosphate (commercially available industrial grade) 0.7 kg, add water 120 kg, ball mill for 6 hours, prepared into a slurry;

[0053] Pressure spray granulation: adopt the pressure spray granulation equipment introduced in patent 200810182753.3, the spray pressure is controlled at 1.2MPa, the nozzle diameter is 1.2mm, the water content of the obtained granulated material is controlled at 2-4%, and the bulk density of the granulated material is 0.95-1.1 g / cm 3 ;

[0054] Compression molding: put the above powder into a mold cavity with a size of 100mm*60*22mm, a round hole, and a hole diameter of 3.0mm, and press it with a JT-5 hydra...

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Abstract

The invention relates to a straight hole ceramic filter for cast steel. The straight hole ceramic filter for cast steel comprises 60 percent to 80 percent of Al2O3, 10 percent to 25 percent of SiO2, 5 to 15 percent of ZrO2 and less than or equal to 1.0 percent of other alkali metal oxide. Preferably, the crystal phase composition of the straight hole ceramic filter adopts zirconium mullite corundum, a principal crystalline phase is formed of mullite and a minor crystalline phase is made of tetragonal phase zirconia, a corundum phase and a small quantity of monoclinic phase zirconium oxide, wherein the content of the zirconium oxide is 5 to 15 percent; the content of the mullite is 40 percent to 75 percent; the content of corundum is 5 percent to 50 percent; the content of a glass phase is less than or equal to 5 percent. The straight hole ceramic filter can resist to fast (straight) rushing of liquid steel with a high temperature of 1,700 DEG C without being broken and achieves an effect of purifying the liquid steel.

Description

technical field [0001] The invention belongs to the fields of silicate materials and industrial ceramics, and in particular relates to a straight-hole ceramic filter for filtering impurities in molten steel 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. The current filters for cast steel are all ceramic foam filters, and the preparation of foam filters for cast steel all de...

Claims

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Application Information

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IPC IPC(8): C04B35/66C22B9/02
CPCY02P10/20
Inventor 祝建勋李顺
Owner JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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