多孔陶瓷过滤器  热性能耐热温度1100℃，最高使用温度1000℃，连续使用温度800℃。

Thermal conductivity 0.77W / m.k at 720 ℃, permanent linear shrinkage less than 0.6% after 760 ℃ for 24 hours.

Appearance size Plug type Length ± 3㎜, thickness ± 1㎜

The surface quality of the single-block defect area is less than 25 mm2, and the height of the unevenness is not higher than 2㎜ The outer surface does not have large damage and lack of fastness.

porous ceramic filter process

Furnace

The correct furnace loading method is very important to reduce the metal loss and shorten the melting time.

For the reverberatory furnace, lay a layer of aluminum ingot on the bottom of the furnace, put the easily burnable material, and then press the aluminum ingot.

炉料熔点较低的炉料与上层一起加载，使其最早熔化，并向下流动覆盖下面的易燃材料，从而减少铝的熔化损失。

各种装料应均匀均匀分布。

融化

熔化过程和熔化速度对铝锭的质量有重要影响。

当加热装料以软化床层时，应适当覆盖助焊剂。在熔化过程中应注意防止过热。炉料的料位水平后，应适当搅拌熔体，使温度一致，也有利于加速熔化。

Too long smelting time not only reduces the furnace production efficiency, but also increases the melt gas content, so when the smelting time is too long, the melt should be refined.

Slag

When the charge is completely melted to the melting temperature, the slag can be stripped.

Before slagging, powdered flux should be sprinkled first (sodium-free flux should be sprinkled for high-magnesium alloys).

The dross removal should be as thorough as possible, because the presence of dross easily pollutes the metal and increases the gas content of the melt.

After adding magnesium and beryllium slag, the magnesium ingot can be added to the melt, and the flux should be added to cover it.

For high-magnesium alloys, 0.002% to 0.02% of beryllium should be added to prevent magnesium burning.

Beryllium can be obtained from sodium beryllium fluoride by metal reduction method. Sodium beryllium fluoride is added by mixing with flux.

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Stir

There should be sufficient time for stirring before sampling and after adjusting the ingredients.

Stirring should be stable without damaging the oxide film on the melt surface.

Sampling

After the melt is fully stirred, samples should be taken immediately for pre-furnace analysis.

Adjust ingredients

When the ingredients do not meet the requirements of the standard, they should be fed or diluted.

Melt Converter

After the composition is adjusted, when the melt temperature meets the requirements, the surface scum is stripped, and the converter can be converted.

Melt refining

不同的变质成分有不同的提纯变质方法。