The experiment principle and method of dephosphotrzation of high silicon ferromanganese silicon outside the SAF is described in this paper,the results show that using CaSi CaF 2 CaO as the dephosphorizing agent,the averrage dephosphorization rates are 31.

The precipitation dephosphorization on ferromanganese-silicon was studied in this work with calcium dephosphorizing agent and the slag of CaO-CaF_2.

Using pure iron,copper oxide,tin granular,tungsten particle and little vanadium pentexide served as flux,inspecting the sulfur content in dephosphorizing agent by the high frequency infrared carbon-sulfur detector.

The results show that the absorbent removing phospholipids has some effect of declouring crude oil,and under the conditions of absorbent 3%,75℃ and duration 15 min,the best dephosphorization and decolouration results can be obtained.