PROCESS FOR PREPARING CHEMICALLY HOMOGENOUS MINERAL FEED ADDITIVES

摘要

Mineral fodder additives are prepared by a process wherein: a) (1) zinc and/or copper are separated as (basic) carbonates from a zinc ammine complex and/or copper ammine complex solution by heat treatment and (2) the manganese is precipitated as manganese carbonate on the obtained carbonate (mixture) from a manganese sulfate solution by the introduction of carbon dioxide and ammonia, or steps (1) and (2) are carried out in reversed sequence, and optionally before or between the precipitations a carrier is added, then the solid phase is separated and added to an aqueous solution containing iron (II) ions, or b) (3) from an aqueous solution containing iron (II) ions iron carbonate is precipitated by adding ammonium carbonate, optionally in the presence of a carrier, zinc and/or copper carbonate and manganese carbonate, respectively, are precipitated on the iron carbonate according to steps (1) and (2) or (2) and (1), hereupon the carbonates are optionally dissolved in the suspensions obtained according to variants a) or b) by adding sulphuric acid, optionally selenite and iodide are added and the mixture is dried. As starting substances by-products and wastes of the metallurgical industry can be used.