日本电力研究公司研制成功有效利用燃煤热电厂产生的煤灰制取硅酸钾肥料的方法。该公司所属热电厂目前每年使用约3百万吨煤,面临处理560,000吨煤灰的问题。其中200,000吨由飞灰水泥公司用作水泥粘土,但其余部分仍未利用。因此,通过加入钾盐后的煤灰获得的这种肥料确实是很重要的。这种肥料有柠檬溶性(在2％的柠檬酸中有溶解特性),而普通钾盐没有这种特性,因此它是一 Japan Electric Power Research Corporation successfully developed the effective use of coal-fired power plant ash produced from potassium silicate fertilizer methods. The company’s cogeneration plant currently uses about 3 million tons of coal per year and faces 560,000 tons of ash. Of these, 200,000 tons are used as cement clay by fly ash cement companies, but the remainder is still unutilized. Therefore, it is indeed important that this fertilizer be obtained by adding soot after the potassium salt. This fertilizer is lemon-soluble (soluble in 2% citric acid), whereas normal potassium salt does not have this property, so it is a