Patent US4199348A successfully refreshed from Google Patents.
US4199348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral ore pellets
Assignee: Covia Holdings LLC
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Filing: 1978-06-07
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Granted: 1980-04-22
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Expires: 1998-06-07
Abstract
Abstract Mineral ore pellets substantially devoid of water are disclosed which contain particles of mineral ore and an alkali metal carbonate. A method for making such pellets is also disclosed which includes mixing particulate mineral ore with an alkali metal carbonate and water to form a plastic mass, forming the plastic mass into pellets, and heating the pellets to drive off the water and provide relatively hard, moisture resistant pellets.
Inventors
- 👤 Ernest R. Ground
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:23
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2406; C22B1/2413
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
42 words
A mineral ore pellet substantially devoid of uncombined water, comprising particulate mineral ore and a binding amount of an alkali metal carbonate, said carbonate being present in a concentration of from about 0.5 wt.% to about 15 wt.% of the dry pellet.
Claim 2
Dependent Claim
42 words
A mineral ore pellet substantially devoid of uncombined water, comprising particulate mineral ore and a binding amount of an alkali metal carbonate, said carbonate being present in a concentration of from about 0.5 wt.% to about 15 wt.% of the dry pellet.
Claim 3
Dependent Claim
41 words
The mineral ore pellet of claim 1 wherein the particulate mineral ore is selected from the group consisting of fluorspar, olivine sand, taconite, manganese ore, chrome ore, and mixtures thereof, and has a particle size of about 50 mesh or smaller.
Claim 4
Dependent Claim
23 words
The mineral ore pellet of claim 2 wherein the alkali metal carbonate is selected from the group consisting of soda ash and potash.
Claim 5
Dependent Claim
57 words
The mineral ore pellet of claim 1 wherein the particulate mineral ore is fluorspar and has a particle size of about 100 mesh or smaller and the alkali metal carbonate is soda ash and is present in the pellet at a concentration of from about 1 wt % to about 5 wt % of the dry pellet.
Claim 6
Independent Claim
92 words
A method for making mineral ore pellets, which comprises mixing particulate mineral ore with a binding amount of an alkali metal carbonate, said carbonate being present in a concentration of from about 0.5 wt.% to about 15 wt.% of the dry pellet, and a plasticizing amount of water to form a plastic mass, forming the plastic mass into pellets to provide sufficient green strength to withstand subsequent handling, and heating the pellets to a temperature sufficient to drive off substantially all of the uncombined water to provide relatively hard, moisture resistant pellets.
Claim 7
Independent Claim
92 words
A method for making mineral ore pellets, which comprises mixing particulate mineral ore with a binding amount of an alkali metal carbonate, said carbonate being present in a concentration of from about 0.5 wt.% to about 15 wt.% of the dry pellet, and a plasticizing amount of water to form a plastic mass, forming the plastic mass into pellets to provide sufficient green strength to withstand subsequent handling, and heating the pellets to a temperature sufficient to drive off substantially all of the uncombined water to provide relatively hard, moisture resistant pellets.
Claim 8
Dependent Claim
35 words
The method of claim 5 wherein the particulate mineral ore is selected from the group consisting of fluorspar, taconite, manganese ore, and chrome ore, and has a particle size of about 50 mesh or smaller.
Claim 9
Dependent Claim
21 words
The method of claim 5 wherein the alkali metal carbonate is selected from the group consisting of soda ash and potash.
Claim 10
Dependent Claim
55 words
The method of claim 5 wherein the particulate mineral ore is fluorspar and has a particle size of about 100 mesh or smaller and the alkali metal carbonate is soda ash and is present in the pellet at a concentration of from about 1 wt % to about 5 wt % of the dry pellet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-22 | 1983-10-22 | 1984-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-22 | 1987-10-22 | 1988-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-22 | 1991-10-22 | 1992-04-22 | $7700.00 | Window Closed / Lapsed |