Method of dynamically detecting contents of manganese, phosphorus and sulphur of slag in converter steelmaking process

The invention relates to a method of dynamically detecting contents of manganese, phosphorus and sulphur of slag in a converter steelmaking process and belongs to the technical field of steelmaking. The technical scheme includes that a laser gas analyzer can be used for detecting smoke components of a converter, combined with blowing oxygen and added with auxiliary material data so as to be transferred into a slag component detective computer system. The contents of the manganese, the phosphorus and the sulphur of the slag can be obtained at current time and releasing type sublance equipment can be used for modifying results so that finally the contents of the manganese, the phosphorus and the sulphur of the slag can be obtained accurately. The method of dynamically detecting the contents of the manganese, the phosphorus and the sulphur of the slag in the converter steelmaking process has the advantages that calculating results can be continuously displayed on a user interface so as to guide converter steelmaking operation to make steel and improve quality of molten steel.