Liquid purification or separation – Processes – Using magnetic force
Reexamination Certificate
1999-06-08
2001-07-24
Reifsnyder, David A. (Department: 1723)
Liquid purification or separation
Processes
Using magnetic force
C210S222000, C209S213000, C209S214000, C209S223100, C209S223200, C209S224000, C096S001000, C096S002000, C096S003000, C095S028000
Reexamination Certificate
active
06264842
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATIONS
Not Applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable.
REFERENCE TO A MICROFICHE APPENDIX
Not Applicable.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to the art of separation of one type of material from a mixture of two or more types of materials; and more specifically, it relates to the separation of such types as they pass through a magnetic field.
2. Description of Related Art
Russian Patent No. 1338-894-A discloses an electromagnet with ferromagnetic material inside the separator chamber. U.S. Pat. Nos. 4,828,711 and 4,902,428 to Cohen disclose magnets disposed within the flow path of the materials being separated. U.S. Pat. No. 4,306,970 to Tanaka discloses a separation device employing a solenoid using amorphous metal elements. This art teaches how to trap metals rather than how to separate one type from another.
BRIEF SUMMARY OF THE INVENTION
This invention relates to an apparatus for magnetically separating magnetizable particles from a mixture of particles, some of which are magnetizable while others are less magnetizable or nonmagnetizable. The mixture of particles to be separated are dropped vertically down a pathway generally perpendicular to a horizontally positioned steel rod that is in the middle of a magnetic field surrounding the pathway and the rod. The pathway is fashioned to circumvent the rod through 180 degrees and resume its downward direction below the rod. A splitter is positioned below the rod to separate magnetizable particles from nonmagnetizable particles. In another embodiment of the invention a mixture of particles is fed into a pathway to form a thin curtain of mixed magnetizable and nonmagnetizable particles passing through a magnetic field generated by an outer circumferential coil and enhanced by an inner circumferential core; the curtain of particles dropping between the coil and the core. A circumferential splitter is positioned immediately following the coil directing the magnetizable particles into an axially central conduit and the nonmagnetizable particles to an outer doughnut-shaped space around the central conduit.
REFERENCES:
patent: 4306970 (1981-12-01), Tanaka et al.
patent: 4828711 (1989-05-01), Cohen
patent: 4902428 (1990-02-01), Cohen
patent: 1338894 A1 (1987-09-01), None
Derwent Translation of SU 1338894 A1, Sep. 1987.
Outokumpu Technology, Inc.
Reifsnyder David A.
Yeager Arthur G.
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