High Phosphorus, Arsenic And Iron Ore Down Phosphorus, Arsenic Test

Along with our country steel industry developing rapidly, Steel yield of our country has exceeded more than 300,000,000 tons in 2005, become the first in the world, but the iron ore resources of our country is absent, the amount of imported iron ore reach to 275,000,000 tons in 2005, the amount which imported iron ore has already shared a half of our country's steel and iron plants needed; Our country has already become the biggest country exceeded Japan in importing iron ore in the world. With incresing the iron ore importing dependence, our country lost the word's power of international mineral price , have become a big hidden trouble of our steel industrial economy safety. Need to depend on technique progress, try our best to explore present iron mine resources, particularly, explore complications mine which separate diffcultly,we can't explore with current technique, increase repertory and increase efficency. Explore the potential production, raise the self-sufficient rate , alleviate pressure of importing iron ore, maintin stability, abundant quantity, superior quality of iron ore raw material's supplying , guarantee steel industry keep a stable development. At present, China have kept a lots of iron mine with more phosphor ,about share 14.86 percent of total amount of iron mine , haven't explored yet, so we need to study a technique which can decline phosphor containing in iron ore, to guarantee raw material supplying for the steel industrial. It is very important to our country.This essay regards elevation quality and decline miscellaneous of iron mine with more phosphor and arsenic in Yunnan as the object of the research, the iron personal status is 54.09%, phosphor's content is 0.48%, arsenic's content is 1.054 ‰, the research sets out from the craft mineralogy, making a series of experiment .We draw a conclusion, the iron existed with the form of limonite , the phosphor existed with the form of collophane, the arsenic existed with the form of arsenopyrite . We got that the result of oxidizing bake - acid soak and deoxidizing bake with medicament-Magnetic separation is better.This topic adopted one craft of deoxidizing bake with medicament - magnetic separation and another craft of oxidizing bake - acid soak , then contrast two crafts.Compare of two crafts, we did a series of conditional experiment. We select the best condition, then got iron concentrate which iron personal status is 67.18 percent, is 0.156 percent, arsenic's content is 0.0306 percent, recovery is 86.12 percent by deoxidizing bake with medicament - magnetic separation. We got iron concentrate which iron personal status is 63.14 percent, phosphor's content is 0.146 percent, arsenic's content is 0.0525 percent, recovery rate is about 100 percent by oxidizing bake - acid soak.Craft of deoxidizing bake with medicament- magnetic separatio is better than craft of oxidizing bake - acid soak.We analysis the experiment in theories: we draw a conclusion that collophane will divide glue and separate as baking, then it will become to separate easily and acid soak easily. Arsenopyrite will turn into As₂S₂ and As₂S₃ as deoxidizing baking, then volatile. Arsenopyrite will turn into As₂O₃ as oxidizing bake, then As₂O₃ sinter with mine. It will solute in acid .