Meaning of zhā:
zhā
渣
Noun
slag (in mining or smelting); dregs
Liàngāng guòchéng zhōng huì chǎnshēng yīxiē zhā.
炼钢过程中会产生一些渣。
Some slag is produced during the steelmaking process.
Zhège kāfēi yǒu tài duō de zhā.
这个咖啡有太多的渣。
This coffee has too many dregs.