US400622A - Process of dephosphorizing iron ore - Google Patents
Process of dephosphorizing iron ore Download PDFInfo
- Publication number
- US400622A US400622A US400622DA US400622A US 400622 A US400622 A US 400622A US 400622D A US400622D A US 400622DA US 400622 A US400622 A US 400622A
- Authority
- US
- United States
- Prior art keywords
- ore
- acid
- phosphorus
- iron ore
- dephosphorizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 32
- 238000000034 method Methods 0.000 title description 24
- 229910052742 iron Inorganic materials 0.000 title description 16
- 239000002253 acid Substances 0.000 description 32
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical group [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 20
- 229910052698 phosphorus Inorganic materials 0.000 description 20
- 239000011574 phosphorus Substances 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 229910052586 apatite Inorganic materials 0.000 description 10
- 238000005406 washing Methods 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 235000011149 sulphuric acid Nutrition 0.000 description 6
- 239000001117 sulphuric acid Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- JUNWLZAGQLJVLR-UHFFFAOYSA-J Calcium pyrophosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])(=O)OP([O-])([O-])=O JUNWLZAGQLJVLR-UHFFFAOYSA-J 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 235000015450 Tilia cordata Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001586 eradicative Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/043—Sulfurated acids or salts thereof
Definitions
- the object of my invention is to separate from iron ore apatite or phosphorus-bearing compounds remaining or adhering to the particles of ore after mechanical processes of separation have been applied.
- phosphorus may be sufficiently removed from low-grade ore otherwise unfit for Bessemer-steel process, so that said ore will be of high grade for such usethat is, the ore will be practically freed from phosphorus, and that, too, at such low cost as to make the process a commercial success.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Removal Of Specific Substances (AREA)
Description
UNITED STATES PATENT OEEicE.
THOMAS FRANCIS WITHERBEE,0E PORT HENRY, NEW YORK.
PROCESS OF DEPHOSPHORIZING IRON ORE.
SPECIFICATION formingpart of Letters Patent No. 400,622, dated April 2, 1889.
I Application filed December 28, 1887. $erial No. 259,237. (No specimens.)
To all whom it may concern.-
Be it known that I, THOMAS FRANCIS WITH- ERBEE, of Port Henry, in the county of Essex and State of New York, have invented a new and Improved Process of Dephosphorizing Iron Ore, of which the following is a full, clear, and exact description. 7
The object of my invention is to separate from iron ore apatite or phosphorus-bearing compounds remaining or adhering to the particles of ore after mechanical processes of separation have been applied.
In practice I find that it is easy to separate apatite and other. gangue from iron ore to a certain degree of purity by several well-known processes, notably by dry or wet magnetic separations, by washing, or by a combination of washing and'a wet or dry magnetic separation; but these processes, -however,"leave the ore witha certain percentage of phosphorus, it being impossible by the mechanical prooesses enumerated to get the phosphorus below .12 or .15 of'one per cent, and consephosphorus remaining after mechanical sep aration by above process, which eradication I bring about by submitting themechanicallypurified ore to the action of dilute acid,preferably sulphuric acid, said acid being used at the rate of fifty to one hundred pounds of acid to the ton and diluted with water, so that the solution will contain from two to five per cent. of concentrated acid. This acid solution is added to the crushed ore, .and, if necessary, heat is applied,the acid acting to dissolve the phosphorus which remains in the solution, and the sulphate of lime formed from the apatite, if the phosphorus isin that combination, will also be in the solution by reason of the Water added to the acid, as stated.
The above proportions of acid and water to the ton of ore worl; well on an ore which, as before stated, contains, after magnetic treating and washing, from .12 to .15 of one per cent. of phosphorus; but I do not confine myself to the quantities of acid specified, as they may be varied to suit the amount of phosphorus in the ore. After the phosphorus is sufficiently removed, which may be ascertained by testing the solution of the ore, the acid is drawn off from the ore, and the ore is washed with water to free it from the adhering acid, so that it may be safely handled.
By the process above described phosphorus may be sufficiently removed from low-grade ore otherwise unfit for Bessemer-steel process, so that said ore will be of high grade for such usethat is, the ore will be practically freed from phosphorus, and that, too, at such low cost as to make the process a commercial success.
Among the advantages of using sulphuric acid are its relative cheapness and the fact thatit will dissolve less of the ore than other acids, and thereby cause less waste of iron.
In carrying 'out my process it must be understood that the ore is first pulverized to such an extent as will detach the crystals of apatite from the ore. The ore is then Washed and treated magnetically, thereby mechanically removing the principal portion of the phosphate of lime, which could not be dissolved out economically by means of acid, following which the acid process is then employed, and finally all traces of acid are washed away with water. V
I wish it to be understood that the solution of acid employed shall be so weak as to have but little, if any, effect upon the ore.
IIaving thus described my invention,I claim as new and desire to secure by Letters Patent-' The process of dephosphorizing iron ore, which consists in mechanically separating apatite or phosphorus-holding compounds from iron 'ore, then dissolving the remaining small percentage ofapatite with dilute sulphuric acid, and finally Washing the ore with water, substantially as described.
. THOMAS FRANCIS WITHERBEE. Witnesses:
E. F. PAGE, J NO. G. WITHERBEE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US400622A true US400622A (en) | 1889-04-02 |
Family
ID=2469584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US400622D Expired - Lifetime US400622A (en) | Process of dephosphorizing iron ore |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US400622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993010271A2 (en) * | 1991-11-14 | 1993-05-27 | S.A. Mineração Da Trindade - Samitri | Improvement of the reduction process in p content and other gangues in iron ore and its agglomerates |
-
0
- US US400622D patent/US400622A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993010271A2 (en) * | 1991-11-14 | 1993-05-27 | S.A. Mineração Da Trindade - Samitri | Improvement of the reduction process in p content and other gangues in iron ore and its agglomerates |
| WO1993010271A3 (en) * | 1991-11-14 | 1993-09-30 | Minerac O Da Trindade Samitri | Improvement of the reduction process in p content and other gangues in iron ore and its agglomerates |
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