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我们工作的第一步是找寻怎样溶解炉渣的方法,用此方法可在一次称样後测定大部份的成份。称0.5克研成粉末的炉渣,於含有50～100毫升蒸馏水的500～750毫升烧瓶内,混和均匀,加入50～70毫升热水与20毫升硫酸(1:4);用橡皮塞塞住烧瓶,搅动至绝大部份试样溶解。滤出不溶物,用冷水洗2～3次,以3～4克碳酸钠在1100°～1200℃熔融2～3分钟(不溶物应先经灼烧,然後熔融)。冷却熔融物,斜持坩埚,溶於5%冷硫酸溶液中,时常搅动使成为均匀的酸溶液。在浸出熔融物时如果有含水二氧化锰成混浊物析出时,可加入少许原有试样滤液;则低价铁会分解混浊物[还原MnO(OH)_3沉淀]。在溶解不完全的情况下就要重新进行熔融。将获得的硫酸溶液(滤液与熔融物浸出液合并)移入500毫升容量瓶内,吸取几部份,分别以光度比色法测
The first step in our work is to find out how to dissolve the slag by using this method to determine most of the ingredients after a sample is weighed. Weigh 0.5 g of powdered slag into a 500 to 750 ml flask containing 50 to 100 ml of distilled water and mix well. Add 50 to 70 ml of hot water and 20 ml of sulfuric acid (1: 4); stopper the flask with a rubber stopper , Stirring to dissolve most of the sample. Insoluble materials were filtered off, washed with cold water 2 to 3 times to 3 to 4 grams of sodium carbonate at 1100 ° ~ 1200 ° C for 2 to 3 minutes (insolubles should be burned, and then melted). Cooling the melt, oblique crucible, dissolved in 5% cold sulfuric acid solution, stirring often to become a uniform acid solution. In the leaching of molten matter if there is watery manganese dioxide into a cloudy precipitate, you can add a little of the original sample filtrate; then iron will decompose the haze [reduced MnO (OH) _3 precipitation]. In the case of incomplete dissolution will have to re-melt. The obtained sulfuric acid solution (filtrate and melt extract combined) into 500 ml volumetric flask, draw several parts, respectively, photometric colorimetry