?????：????? ???? ????? ???? ?????, ???? ??? ??????: ?????, ?????, ?????, ?????, ????? ???.
??? ?????? ??? ???? ??? ????? ?????? ????, ????? ?????? ???? ??????? ????? ???? ????? ???????, ????? ???????? ???????? ?????????. ????? ?????? ?? ??? ?????? ????? ?? ????? ???????? ??????? ?????? ?????? ????? ???????, ?? ?????? ?? ???? ????? ?????? ?? ?????? ????? ???. ???? ?? ???? ????? ???? ?? ????? ?????? ?? ??? ?????? ?????? ?? ??????? ?????? ??????, ???? ?? ??? ??? ?????? ???? ?????? ??? ?????? ????? ??????.
????? ????? ??????
?????? ???????????? ?????? ??? ?????, ????? ?????? ???? ????? ????? ????????? ????. ????? ????, ?????? ???? ?????? ?????? ??????-?????? ???????, ?????? ?????? ???? ?? ??????? ??????????, ???????, ?????? ???????? ?????????.
?????? ???????? ?? ????? ?????? ??:
- ?????? ?? ????? Cr?O? ??? ????? ?????? ???? (???? ??? >40% ???? ???? ????).
- ????? impure??? ???? ??????, ???????, ??????? ??? oxide ?????? ????.
- ????? ?? ?????? ????????? ?? ???? ??????? ???? ????? ?????.
- ????? ?? ????????? ?? ??????? ??????.
????? ????? ????? ??????
????? ?????? ???? ???? ?????, ???? ??? ???? ?????, ?????, ?????, ?????, ????? ???. ?????? ???????? ????? ???????? ????? ??????? ????? ???????.
1. ????? ????? ??????
????? ????? ????? ??????? ????? ?????? ????? ???????. ????? ???????, ??? ???? ??? ????? ?????? ?????? ?? ??-???????, ?????? ???? ?? ??????. ????? ?????? ??? ?????? ?? ????? ????? ???????, ??????? ????? ????? ?????? ???? ?????? ???. ??? ??? ?????? ????? ??? ??? ???? ?? ????? ??? ????? ??????, ????? ???? ???? ?? ???? ?? ???? ??????.
2. ??? ??????
2.1 ????? ???????
?????? ?????? ??????? ????? ???? ??? ?????? ??? PE ?????? ???????. ????? ???? PE ??? ????? ??? ????? ????? ???? ????? ??? ????? ?? ?????? ??????? ?? ????? ????? ??????? ????? ????. ?? ?? ??? ???? ??? ???? ????? ??????? ?? ??????? ????? ??????. ????? ?????? ?????? ???? ?????? ???? ???? ???? ????? ?? ?????? ???? ???? ??????, ??? ??? ????? ?????. ???? ?? ?????? ??????? ??? ???? ??? ????? ?? ??? ????? ????????? ?????, ???? ???? ???? ??? ?????? ???? ???? ?????? ??????.
2.2 ????? ?????
???? ????? ???????, ??????? ??????? ?????? ????? ?????? ????? ????? ?????. ????? ?????? ??????? ??????进一步 ?? ???? ?????? ??????? ?? ??? ????? ????? ?? ????? ????? ?????? ?????. ?? ?? ??? ????? ????? ?? ????? ??? ???????? ?????. ??????? ??????? ???? ?? ?????? ??? ???? ??? ?????? ????????, ??? ?????? ?????? ???? ??????? ????? ????. ????? ??????? ??????? ????? ???? ??? ??????? ??? ????. ???? ????? ????? ?? ??????? ???????? ?????? ?????, ???? ??????? ??????? ?-20 ?"? ??????? ?????? ?????? ??????? ????? ????? ?????, ???????? ????? ????? ????? (???? ?-3 ?"? ????? ??) ??????? ???? ??? ?? ??????.
3. Grinding
???? ??????? ????? ??? ?-3 ?"? ????? ???? ????? ???? ??????. ????? ????? ??? ????? ???????? ??? ?????? ????. ???? ?????? ??????, ????? ????? ??????? ??????? ?? ?????? ?????, ???????? ???? ????? ???. ????? ?????? ????? ?????? ???????? ??????? ?????? ????. ??? ?????? ????? ?????? ??? ????? ????????? ??????? ???????? ??????? ??? ????? ????, ?? ????? ?????? ?? ????? ?????? ??????? ??????? ??????? ???? ???? ???????.
4. ?????
???? ?????, ?????? ?? ????? ??????? ??????? ?????? ?????? ??????. ?????? ??????? ???? ????? ????? ??????? ?????? ?? ??????? ?????? ????? ????? ????? ??? ?????? ??????. ???????? ??????? ???????? ???? ?????? ??? ???? ??????? ?? ??? ?????? ??????? ?????? ??????, ???? ????????? ?????? ???? ?????? ?????? ?????? ???????? ??????. ?????? ??????? ???????, ?????? ?? ???????? ??????, ?????? ???? ??? ???? ?????? ??????? ????? ????? ?????, ???? ??????, ?????? ?? ???????? ??????? ???????, ?????? ???? ??????.
5. ??? ?????
5.1 ?????
???? ?????? ???? ???????? ??????? ???? ????? ???? ????? ??????. ????? ?????? ??? ????? ?????? ??? ?????, ????? ?? ???? ????? ?????? ?????? ??? ???????? ??????? ???? ????? ????. ??????? ??? ????? ????? ????? ??????? ???? ?????? ????. ?????? ??????, ????? ??? ??? ????, ????? ??????? ??????? ?????? ????? ?????? ???? ??????? ???? ????? ?????? ?????? ????????. ????? ?????? ?????? ?????? ??? ????? ????? ???????, ????? ????? ??????, ???? ????? ?????? ??????? ??????? ??? ????.
5.2 ????? ????? ??????
????? ????? ???'??? ????? ???? ????? ??????. ?????? ??????? ??? ????? ???? ?????? ????? ?????? ??????? ???????? ?? ?????, ??? ?????????? ?????? ??? ?????? ??? ???????. ???????? ?????? ????? ??? ?????? ???????, ?????? ??????? ?????? ???? ???? ??? ?????? ?? ?????? ??????? ??????, ???? ??????? ??? ????? ???? ???? ??? ??????? ????????? ??????. ?????? ??????? ??????? ?? ????? ????? ????????, ??????? ??????? ????? ????? ????? ????.
5.3 ????? ????? ???
????? ?????? ????? ??????? ??????? ?????? ????? ?????? ???????? ??? ????? ????? ?????. ??????? ??? ?? ???? ????????? ?????? ??????? ???? ?? ?? ????? ??????, ????? ?????? ????. ?????? ???? ?? ???? ????? ???????, ??? ????? ???????? ???? ????? ?? ???-??. ?????? ??????? ?????? ???? ??? ???? ???????? ???? ?????? ?? ??????, ???? ??????? ????? ????? ???? ??? ???? ???????? ???? ??????. ???? ?????? ????? ??????? ??? ????? ??? ????? ????? ????? ???? ???? ?????? ????? ?????? ?????? ?????.
6. ??? ?????
6.1 ?????
?????? ?? ???? ????? ?? ?????? ???? ???? ???????? ?? ???. ??? ?????? ?? ????? ????, ?????? ???? ????? ????? ?????. ???? ?????? ??? ???? ????, ???????? ??? ???? ?????? ???? ??????? ??? ????? ??????. ?????????? ????????, ???? ??????? ?? ??? ???? ???????, ??????? ?????? ?????? ??????. ???? ?????? ???? ?????? ?? ????? ??????? ??????? ?? ?????? ?-20 - 30% ???? ??? ?-40 - 60%.
6.2 ????? ?????
???? ?????, ?????? ??????? ????? ???? ???? ?????. ???? ??????? ????? ???? ????? ??? ????? ??? ??? ???? ?????, ?????? ????? ???? ????? ?? ????? ??????. ????? ????? ??????? ????? ??? ???? ?? ????? ???? ?? ?????? ???? ?????? ?????? ????????, ???? ??? ??????? 8 - 12%. ?????? ?????? ??????? ????? ?? ????? ?????? ?????? ????.
7. ????? ?????
?????? ???? ?????? ??????, ?????? ????? ?????? ???????, ????? ??????? ????? ????? ?????? ???????. ?????? ????? ?????? ????? ????? ?? ????? ?????? ?? further treatment ????? ?????? ????? ?????? ?? ?????? ?????? ???????? ????. ?????? ???????, ?????? ????? ????? ????? ???? ??????? ??????? ????? ?????? ??? ????? ????? ?????? ?? ?????? ?????? ???????.
????? ??????????? ???????
??????????? ?? ??????
??? ???? ?? ??????? ???????? ??????? ?? ????? ?????? ?? ????? ???????, ???? ????? ????? ?? ???? ???????????. ??? ?????? ??????????? ?? ?????? ?????? ??????? ??? ????? ?? ?????? ?????? ?? ?????? ??????? ??? ????? ????? ???????. ?????? ??????? ?? ?????? ???? ??????, ???? ??? ????? ???? ??'??? ?????????? ??????? ?? ?????? ??????, ?????? ?? ?????? ????? ???????? ?? ?????? ??????. ?????, ?????? ??????? ???? ??????? ???? ????? ????? ?????? ?? ?????? ???? ???, ??????? ????? ????? ????? ?????? ?????? ?????.
Challenges
????? ????? ???? ??????? ???? ?? ???? ??????. ??? ??????? ???????? ??? ????????? ?? ?????? ?????? ??????? ????????. Deposits ???? ?????? ????? ???? ????? ???????? ??????????, ????, ?????? ???? ???????, ?? ????? ?????? ?? ?????? ????? ??????. ???? ???? ??? ???? ??????. ????? ?????? ????? ?????? ?????? ?? ?????, ??? ???? ????? ??? ????? ????? ??????. ?????, ?????? ???? ?????? ???? ????? ???? ??????? ???? ???, ??????? ?????? ?????? ?????????? ??????? ???? ??????? ??????.
????? ????? ????? ?????? ??? ????? ?????? ????-????? ??????? ?? ???? ?? ??????? ????? ?????? ????? ???? ??????? ???? ??? ?? ?????? ?????? ??????. ?? ???, ??? ?????? ????? ????? ??? ?????? ????? ?????? ?????? ??????, ???? ????? ????? ?????? ??????? ??????????? ?????? ?? ??????. ?? ??? ???? ???????? ???????? ?? ?? ???, ??? ?? ????????? ?? ??????? ??????????? ????????????, ?????? ????? ????? ?????? ????? ?????? ???? ?? ???????? ??? ?????? ???? ?? ????? ?? ???? ???? ??????? ????????? ?????.
?????
??? ?????