一、前言硫酸生产时沸腾炉排出红渣还是黑渣?如何降低升华硫和酸雾的大量生成与危害?如何降低烧渣(灰)残硫?他们之间有什么内在关系?排出不同性质烧渣对硫的有效利用率有什么影响?这些问题一向为硫酸工作者所关心。随着对矿渣综合利用工作的发展,都要求矿渣具有较高的铁品位,并尽量降低硫(S)、硅(SiO_2)等有害杂质。矿渣不经过特殊的预处理(如还原焙烧等)就直接磁选是达到上述要求的最简便方法。它为矿渣综合利用炼铁提供了一条投资少,上马快,设备简单的符合多快好省的选矿工艺路线。这就要求生产硫酸的同时,沸腾炉直接排出磁性矿渣。因此,在硫酸生产正常的情况下,稳定排出适合于直接磁选的矿 How to reduce the mass generation and harm of sublimation sulfur and acid mist? How to reduce the residue of ash (ash)? What is the internal relationship between them? Discharge slag of different nature What is the impact on effective sulfur utilization? These issues have always been of concern to sulfuric acid workers. With the development of comprehensive utilization of slag, slag is required to have a high iron grade and minimize harmful impurities such as sulfur (S) and silicon (SiO 2). Slag without direct pre-treatment (such as reduction roasting, etc.) on the direct magnetic separation is to achieve the above requirements of the easiest way. It comprehensive utilization of iron and slag for the slag to provide a less investment, quick start, simple equipment in line with the more fast and good beneficiation process line. This requires the production of sulfuric acid at the same time, the boiling furnace directly discharge magnetic slag. Therefore, when the production of sulfuric acid is normal, the ore suitable for direct magnetic separation is stably discharged