According to the analysis of typical BOF slags,the activities of FeO and CaO in the slags were obtained from the iso activity diagrams of (CaO+MgO+MnO) (SiO 2+ P 2O 5) FeO n system,whereby the effective concentrations of CaO and FeO in BOF slag were determined.
The dephosphorizing agent containing 20 percent LD slag was optimized by the powder injection experiments in laboratory, the dephosphorization ratio reached 70 percent.
Mineral phase of LD slag was studied when smelting SPHC and Q235 by high phosphorus hot metal,the results show that mineral phase of slag consist of C2S mainly,P2O5 exist in C2S phase,After de-oxygen,mineral phase of slag consist of akermanite and gehlenite mainly.
APPLICATION OF LD SLAG IN HOT METAL PRETREATMENT PROCESS AT BAOSTEEL
The results indicated that dephosphorization effect of the dephosphorizing agent containing LD slag corresponds to the conventional dephosphorizing agent during the industrial scale test, and the temperature drop decreased.
Proceeding from the features of electric slag cleaning furnace for treating Isa furnace slag and converting slag, this article analyses and discusses the relations between oxygen potential, matte grade, Fe3O4 and copper in slag as well as thermodynamics and dynamics of Fe3O4 reduction;
A treatment process was developed when basic oxygen furnace slag (BOF slag) and hydrogen peroxide were used to oxidize 2,4-dinitrophenol from an aqueous solution.
BOF slag, final waste slurry from steel making plants, contains about 12.5% by weight of ferrous oxide.
In an acid solution, BOF slag can be dissociated to produce ferrous ions and react with hydrogen peroxide to produce hydroxyl radicals and oxidize 2,4-dinitrophenol.
Various factors critical to the oxidation of 2,4-dinitrophenol were studied, including hydrogen peroxide concentration, concentration of BOF slag, initial concentration of 2,4-dinitrophenol, and pH value of solution.
Experimental results proved that 100 mg/L 2,4-dinitrophenol and its oxidation intermediate could be totally decomposed within 60 min by 10 g/L BOF slag, 0.18 g/L hydrogen peroxide and pH 2.8 ± 0.2.