The result of converter slag erosion on 4 middle grade MgC bricks with Csolid (12～21%) shows that ferric oxides play an important role during slag erosion, and the higher graphite content in the brick is, the better the slag resistance will be.
The powder characteristics of the converter steel slag cooled naturally,with 210～485 m~2·kg~(-1) Blaine specific surface area,have been studied by using a 500×500 mm cement ball mill as grinding device in this paper.
On the base of chemical composition and mineral assemblage,we have selected the heating shock fragmentation method to treat steel making factory’s converter steel slag,and have recommended the current of treatment and recovery utilization.
An industrial sintering test of mix with addition of BOS slag was conducted on two 75m~2 sinter machines, and the effect of such sinter on BF operation was evaluated through the test run in two blast furnaces.
Some tests for Liangang sinter adding BOS slag have be done in the laboratory and plant trial. The results show that in the range of BOS slag percentage,from 0% to 8%,with the increase of BOS Slag percentage,the sinter speed has been lower,but the sinter strength and productivity of sinter product have been higher,the sinter productivity will be the maximum when BOS slag percentage is 4%;
In combination with the pretreatment processes for stabilizing BOF slag,the mineral morphology,composition and structural characteristics of BOF slag after pretreated with wind crush,drum method,and hot splash method were studied and the effect of various kinds of stabilization pretreatment processes on the recycling of BOF slag as a resource was discussed.
In view of the existing treatment process of hot metal containing vanadium and V_2O_5 content in BOF slag at Pangang, a new process of vanadium recovery from BOF slag containing vanadium oxide was put forward. The experiments of smelting BOF slag containing vanadium oxide and recovering vanadium from hot metal with high vanadium have been carried out.
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.