Method of treating fluoride contaminated wastes

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

204167, 252629, 423343, 423484, 501153, 501154, 501155, C01F 100, C01B 3308, C01B 711, C04B 3308

Patent

active

047357843

ABSTRACT:
A process for treating solid substantially non-volatile wastes contaminated with a heat sensitive contaminant is disclosed. The wastes are heated to form a liquid slag. The liquid slag is held at elevated temperature until at least a portion of the contaminating components have either decomposed or evolved from the melt as a gas. The slag is subjected to cooling and the contaminating compounds are bound or encapsulated into a solid glassy slag. The process is particularly suitable for handling fluoride and cyanide contaminated aluminum smelting wastes such as spent potliner material. It is advantageous to add silica to such wastes. The residue from the slagging reaction is a glassy solid sodium metal silicate matrix such that the fluoride residues remaining in the wastes are encapsulated. The amount of silicate blended with the feed material is selected to substantially tie up all of the sodium remaining in the residue after slag melting and is typically 7.5 to 50 weight percent of the feed. The resulting solid, glassy slag material produced is not hazardous to health and is essentially inert to the environment.

REFERENCES:
patent: 1196829 (1916-09-01), Wescott
patent: 2895799 (1959-07-01), Le Baron et al.
patent: 2995436 (1961-08-01), Hollingsworth et al.
patent: 3236606 (1966-02-01), Moore et al.
patent: 3519815 (1970-07-01), Sandbrook
patent: 3561930 (1971-02-01), Brown et al.
patent: 4020004 (1977-04-01), Schulz et al.
patent: 4065551 (1977-12-01), Dahl
patent: 4097401 (1978-06-01), Guber et al.
patent: 4113831 (1978-09-01), Orth, Jr. et al.
patent: 4113832 (1978-09-01), Bell et al.
patent: 4158701 (1979-06-01), Anderson et al.
patent: 4160809 (1979-07-01), Anderson et al.
patent: 4362701 (1982-12-01), Kruger et al.
patent: 4367075 (1983-01-01), Hartwig
patent: 4439209 (1984-03-01), Wilwerding et al.
patent: 4444740 (1984-04-01), Snodgrass et al.
patent: 4469628 (1984-09-01), Simmons et al.
patent: 4498896 (1985-02-01), Leis
patent: 4544499 (1985-10-01), Tran et al.
"Centrifugally Cast Glass-Ceramic Pipe from Mining and Processing Wastes", by Arthur V. Petty, Jr., from the U.S. Dept. of the Interior, a 35 page document.
Spent Potlining Symposium by Lee C. Blayden et al., a 9 page document.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method of treating fluoride contaminated wastes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of treating fluoride contaminated wastes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of treating fluoride contaminated wastes will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2232575

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.