Every year,more than 40-thousand-stere underutilized quenching water scoria runs into rivers from iron-making workshop of Boli County Steel and Iron Works, which pollutes farmland and destroys rivers.

• 勃利县钢铁厂炼铁车间,每年都要排出四万多立方米的急冷水萃矿渣,污染河流、吞食耕田,不能充分有效利用。