在副產爐煉焦時,一般將回收的氨製成氨水,硫酸銨,或重碳酸銨。此項製品除小部份供給工業用外,其餘可作肥料之用。農學上早已在試驗上證明,在同等條件下,如三種製品所用氮的量相等,農産收成大致相同,但在經濟上,製造上及用法上那是差別很大的,研究各焦廠應製成那一種化合物比較合理,實在有討論的必要。 In the coking by-product furnace, the recovered ammonia is generally made into ammonia, ammonium sulfate, or ammonium bicarbonate. In addition to a small part of this product for industrial use, the rest can be used as fertilizer. Agronomy has long been proved experimentally that, under the same conditions, such as the three products used in the same amount of nitrogen, agricultural yield roughly the same, but economically, manufacturing and usage that is very different, the study of the coke plant should be As a kind of compound is more reasonable, it is necessary to discuss.