US2251248A - Process for the removal of phosphorus from manganese ores - Google Patents
Process for the removal of phosphorus from manganese ores Download PDFInfo
- Publication number
- US2251248A US2251248A US362788A US36278840A US2251248A US 2251248 A US2251248 A US 2251248A US 362788 A US362788 A US 362788A US 36278840 A US36278840 A US 36278840A US 2251248 A US2251248 A US 2251248A
- Authority
- US
- United States
- Prior art keywords
- phosphorus
- removal
- manganese
- ore
- sulphate
- 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
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
- C22B47/00—Obtaining manganese
Definitions
- This invention relates to new and useful improvements in a process for the removal of phosphorus from manganese ores.
- the process consists in igniting a manganese oxide ore (tervalent or tetravalent manganese oxide or hydrated oxides) with a manganese sulphate, all in a finely ground condition, at a temperature sufiicient to decompose the sulphate and drive oif the sulphur trioxide ($03), after which the calcined ore is extracted with water 'or with a dilute aqueous solution of an acid.
- a manganese oxide ore tervalent or tetravalent manganese oxide or hydrated oxides
- the man-- ganese sulphate maybe added as such, or formed. in situ by adding to the ore sulphuric acid, sulphurous acid, $02 or free sulphur, the last forming a manganese sulphate or sulphates on ignition.
- Other sulphates may be used; in fact any sulphate which decomposes with liberation of sulphur trioxide when heated to the temperature in use. It should be clearly understood that this invention is not limited as to the means of introduction of the sulphate radicaL- A typical procedure will now be given which constitutes a practical working formula but which may be varied both qualitatively and quantitatively through an infinite number of modifications.
- an ore such as psilomelane (ground to pass a 100 mesh screen) is moistened with water containing sulphuric acid equivalent to about 2% of the weightof the ore taken. This is dried by gentle heat, and broken into lumps about the size of an egg. These lumps are then charged into a rotary kiln, reverberatory furnace or crucible and strongly ignited at near 950 degrees centigrade for a period of time sufllcient to thoroughly drive off all the sulphur trloxide (except for traces). It is essential to avoid a reducing atmosphere during the ignition,
- a process for removal of phosphorus from manganese ores consisting in igniting a manganese oxide ore with a manganese sulphate, all
- a process for removal of phosphorus from manganese ores consisting in igniting a manga- 1 nese oxide ore with a manganese sulphate, all in finely ground condition, at a temperature suflicient to decompose the sulphate and drive off sulphur trioxide, after which the calcined ore is extracted with a dilute aqueous solution of an acid.
- a process for the removal of phosphorus I from manganese ores consisting in igniting a manganese oxide ore with a manganese sulphate formed in situ by adding to the ore a sulphate radical, at a temperature suflicient to decompose
Description
Patented July 29, 1941 PROCESS FOR. THE REMOVAL OF PHOS- PHORUS FROM MANGANESE ORES Troy w. Carney, Fort Smith, Ark.
No Drawing. Application October 25, 1940,
Serial No. 362,788
4 Claims.
This invention relates to new and useful improvements in a process for the removal of phosphorus from manganese ores.
Essentially, the process consists in igniting a manganese oxide ore (tervalent or tetravalent manganese oxide or hydrated oxides) with a manganese sulphate, all in a finely ground condition, at a temperature sufiicient to decompose the sulphate and drive oif the sulphur trioxide ($03), after which the calcined ore is extracted with water 'or with a dilute aqueous solution of an acid.
Numerous processes have been invented for the removal of phosphorus from manganese ores, but none of these processes have met with commercial success because of inherent deficiencies. Such prior processes included subjecting the ore to a reducing gas, which is not a practical proposition. The atmosphere used in the present invention is strong oxidizing and depends on an. entirely different principle. Another prior proposal consisted in vaporizing the phosphorus in a. furnace and involved the reduction of the ore, in part at least, to the metallic state. This "also is not a practical method.
Other methods have also been proposed but in each instance there was some lack which prevented its adoption by the industry.
In accordance with this invention the man-- ganese sulphate maybe added as such, or formed. in situ by adding to the ore sulphuric acid, sulphurous acid, $02 or free sulphur, the last forminga manganese sulphate or sulphates on ignition. Other sulphates may be used; in fact any sulphate which decomposes with liberation of sulphur trioxide when heated to the temperature in use. It should be clearly understood that this invention is not limited as to the means of introduction of the sulphate radicaL- A typical procedure will now be given which constitutes a practical working formula but which may be varied both qualitatively and quantitatively through an infinite number of modifications.
100 parts by weight of an ore, such as psilomelane (ground to pass a 100 mesh screen) is moistened with water containing sulphuric acid equivalent to about 2% of the weightof the ore taken. This is dried by gentle heat, and broken into lumps about the size of an egg. These lumps are then charged into a rotary kiln, reverberatory furnace or crucible and strongly ignited at near 950 degrees centigrade for a period of time sufllcient to thoroughly drive off all the sulphur trloxide (except for traces). It is essential to avoid a reducing atmosphere during the ignition,
operating preferably with an oxidizing atmos-' phere with a very gentle ventilation.
After ignition the ore is cooled and re-ground, or rather, the lumps are broken down into powder by some form of disintegrating equipment. This powder is mixed intimately with water or dilute acid, preferably nitric. 'If acid is used,
it is preferable to use just suflicient an amount to maintain an acid reaction toward Congo red during the leaching and filtration. The product is then filtered and washed, the greater part of the phosphorus going out in the liquid.
While I have described the preferred embodi-' ments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications.
Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:
l. A process for removal of phosphorus from manganese ores, consisting in igniting a manganese oxide ore with a manganese sulphate, all
in finely ground condition, at a temperature sufficient to decompose the sulphate and drive off sulphur trioxide, after which the calcined ore is extracted with water.
2. A process for removal of phosphorus from manganese ores, consisting in igniting a manga- 1 nese oxide ore with a manganese sulphate, all in finely ground condition, at a temperature suflicient to decompose the sulphate and drive off sulphur trioxide, after which the calcined ore is extracted with a dilute aqueous solution of an acid.
3. A process for the removal of phosphorus I from manganese ores, consisting in igniting a manganese oxide ore with a manganese sulphate formed in situ by adding to the ore a sulphate radical, at a temperature suflicient to decompose
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US362788A US2251248A (en) | 1940-10-25 | 1940-10-25 | Process for the removal of phosphorus from manganese ores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US362788A US2251248A (en) | 1940-10-25 | 1940-10-25 | Process for the removal of phosphorus from manganese ores |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2251248A true US2251248A (en) | 1941-07-29 |
Family
ID=23427531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US362788A Expired - Lifetime US2251248A (en) | 1940-10-25 | 1940-10-25 | Process for the removal of phosphorus from manganese ores |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2251248A (en) |
-
1940
- 1940-10-25 US US362788A patent/US2251248A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2197003A (en) | Process for making pigments | |
| US2251248A (en) | Process for the removal of phosphorus from manganese ores | |
| US1932413A (en) | Process of manganese ore treatment | |
| US1833686A (en) | Process of beneficiating iron ores | |
| US1821208A (en) | Barium silicorferrite and process of preparing the same | |
| US1943332A (en) | Method of chloridizing ores by means of ferric chloride | |
| US1674806A (en) | Process of treating ores | |
| US1944281A (en) | Process of producing chemical compounds | |
| US1552595A (en) | Process for the extraction of cadmium as sulphate | |
| US1964747A (en) | Process of separating metals | |
| US3479177A (en) | Process for removing arsenic from arsenic-containing iron minerals | |
| US1634100A (en) | Toria | |
| US1468806A (en) | Metallurgical process | |
| US1917945A (en) | Process of making ferric sulphate | |
| US2067778A (en) | Method of treating complex lead bearing ore materials | |
| US2200563A (en) | Method of preparing ores to facilitate extraction of metals | |
| US1730514A (en) | Treatment of iron pyrites | |
| US1450507A (en) | Method of recovering vanadium from its ores | |
| US1552506A (en) | Process for the extraction of cadmium as sulphate | |
| US1783778A (en) | Process of treating barytes | |
| US1833683A (en) | Metallurgical process | |
| US3152862A (en) | Process for treating uraniumcontaining oxide ores | |
| US1744867A (en) | Method of roasting ores and minerals | |
| US1943336A (en) | Method of chloridizing sulphide ores | |
| US1071290A (en) | Process of extracting metals from minerals, rocks, and other materials. |