In various fields of casting production, casting manufacturers may be worried about product quality and struggling with the high scrap rate of finished products. If castings contain too many impurities, the castings are relatively fragile, resulting in cracking of the castings, dense pores on the surface, and poor surface finish. Not enough, the internal structure of the casting product is hard, the CNC processing time is long, the damage rate is too high, etc. A new generation of casting purification filters—honeycomb ceramic filters—can help you solve these problems, improve the quality of castings, and improve production efficiency.
1. Working principle of honeycomb ceramic filter
The main working principle of the honeycomb ceramic filter is to turn the turbulent and churning molten metal into a smooth. uniform and clean molten metal after passing through the ceramic honeycomb holes. The unique honeycomb structure can adsorb some small particles on its surface. Allows the removal of impurities that cause product surface problems, low strength and hardness. Because the ceramic filter is made of many tiny particles and binders fired at high temperatures. It has many tiny pores distributed from the inside to the outside. Of course, when gas or liquid passes through the filter, it can efficiently filter suspended matter. , thereby achieving the purpose of removing oil or purifying sewage.
Such as some non-metallic particles, slag, refractory fragments, etc. The stable laminar flow of metal fills the mold better, which on the one hand overflows the bubbles. On the other hand reduces the erosion of the sand mold and reduces the product scrap rate. Effectively remove non-metallic inclusions in molten metal, improve the microstructure and mechanical properties of castings, produce high-quality standard precision castings, reduce casting scrap rates, reduce wear during casting processing, etc., and significantly increase economic and social benefits.
2. Precautions for Honeycomb Ceramic Filters
1) Use honeycomb ceramic filters to control the alloy melting point. To prevent the temperature from being too high and damaging the filter function;
2) Select the corresponding mesh, and the purification effect must match the requirements of the casting;
3) The casting temperature of the honeycomb ceramic filter should be as high as possible to increase the fluidity of the metal;
4) When the filter is placed horizontally under the intersection cup or on the parting surface, the casting height should not exceed 20 cm. The molten metal rushes against the wall of the intersection cup and does not rush directly toward the filter screen;
5.)Handle the filter with care and place it in a dry and ventilated place when not in use.
3. Characteristics of honeycomb ceramic filter
It has the characteristics of high temperature resistance, chemical corrosion resistance, high mechanical strength, no harmful substances leaching, easy cleaning and regeneration, long service life, etc., and has good effect in dust removal and wastewater treatment. The suspended solids removal rate reaches more than 93%, and the COD removal rate reaches more than 30%. The water quality after filtration is clear and reaches the emission standard (70-mg/1).
The honeycomb ceramic filter is sintered at a high temperature of 900 degrees. Its working principle is relatively simple, but we should pay attention to some precautions during use. At the same time, we also need to pay attention to its maintenance in daily life.