US1728094A - Eebt available - Google Patents
Eebt available Download PDFInfo
- Publication number
- US1728094A US1728094A US1728094DA US1728094A US 1728094 A US1728094 A US 1728094A US 1728094D A US1728094D A US 1728094DA US 1728094 A US1728094 A US 1728094A
- Authority
- US
- United States
- Prior art keywords
- zinc
- carbide
- sulphide
- nitrogen
- ores
- 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
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 36
- 239000011701 zinc Substances 0.000 description 26
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 24
- 229910052725 zinc Inorganic materials 0.000 description 24
- 238000000034 method Methods 0.000 description 20
- 229910052757 nitrogen Inorganic materials 0.000 description 18
- JGIATAMCQXIDNZ-UHFFFAOYSA-N Calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 8
- 239000005083 Zinc sulfide Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 6
- 239000006227 byproduct Substances 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- CJDPJFRMHVXWPT-UHFFFAOYSA-N Barium sulfide Chemical compound [S-2].[Ba+2] CJDPJFRMHVXWPT-UHFFFAOYSA-N 0.000 description 2
- UIXRSLJINYRGFQ-UHFFFAOYSA-N Calcium carbide Chemical compound [Ca+2].[C-]#[C-] UIXRSLJINYRGFQ-UHFFFAOYSA-N 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052976 metal sulfide Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
- 230000000630 rising Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910052950 sphalerite Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- 229910052984 zinc sulfide Inorganic materials 0.000 description 2
Images
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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/11—Removing sulfur, phosphorus or arsenic other than by roasting
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/02—Preliminary treatment of ores; Preliminary refining of zinc oxide
Description
Patented Sept. 10, 1929.
UNITED STATES PATENT OFFICE.
PROCESS OF REDUCING ZINC ORES.
No Drawing. Application filed December 1. 1926, Serial No. 152,070, and in Germany October 23, 1926.
This invention relates to a process of reducing zinc ores which consists in reducing the ores with carbide in a nitrogen-current. According to this process non-calcined zinc sulphide ore can be converted directly into metallic zinc, only very little quantities of zinc (0.5% or less) remaining in the slags.
The conversion of zinc sulphide ores takes place according to the equation ZnS MeG Zn+ MeS 20 As shown by this equation metallic sulphides are obtained in this process as byproducts. The process is, therefore, specially important for the production of barium sulphide and calcium sulphide as by-products. The products were hitherto obtained only as main products at the reaction of the corresponding sulphates.
The nitrogen serves as protecting atmosphere and prevents oxidation of the corresponding sulphide to sulphate. Instead of nitrogen any other gas may be used which does not have a disturbing influence upon the reaction.
If calcium carbide is used for carrying out the process, residues which contain calcium sulphide are produced at the reduction of sulphide zinc ores. These residues may serve, eventually with the addition of carbon, for the production of carbide or for the nitration of carbide producing mixtures. They are especially adapted for this purpose as they contain in an extremely fine distribution, the iron which exists in the zinc ore, and in a freshly reduced state, this 1 facilitating the generation of carbide from sulphide-containing mixtures.
The process may he carried out in any 40 known furnace which is suited for the reduction of zinc ores with carbide. The known muffle furnaces are of course closed, and in addition thereto, it is obviously only necessary to provide an inlet and outlet for the stream of nitrogen. The invention depends upon no particular furnace construction and many suitable modifications of furnace structure will be apparent to those familiar with the art.
The principles of the invention may be applied to various mixtures and charges containing numerous variations as to quantities and ratios of the reacting substances, and the following is mentioned by way of example only.
Approximately equal parts of, say, 72% carbide and 45% ground zinc sulphide, containing possibly about 5% of a dry flux such as an alkaline chloride, are poured into a zinc inullle furnace which may be heated indirectly or directly by means of electric resistance and which is provided with a zinc lined gas inlet and outlet. The air originally in the muflle is expelled by the stream of nitrogen which is passed through the furnace. The temperature is gradually raised to about 1200 C. At about 700 C. the reduction process begins but, of course, becomes more vigorous with a rising temperature which may be easily regulated by avariation of the supply of nitrogen. About 90% of the zinc will be secured in metallic form, and the remainder, except for some few tenths per cent which will be left in the residue, will be obtained as dust. The residue contains, besides small amounts of zinc varying from one-tenth .to five-tenths per cent, a high grade" calcium sulphide. Further heating of the calcium sulphide to a substantially higher temperature with the admission of nitrogen will form a product containing about 12% to 14% of nitrogen.
I claim 1. The process for the reduction of zinc ores by carbide, characterized by the fact that the ores are reduced by carbide in a stream of nitrogen.
2. The process of reducing a zinc sulphide ore which comprises forming a mixture of the ore and a carbide, heating themixture and reducing the ore by the carbide in the presence of a stream of nitrogen.
In testimony whereof I aflix my signature.
HERBERT 'WITTEK.
Publications (1)
Publication Number | Publication Date |
---|---|
US1728094A true US1728094A (en) | 1929-09-10 |
Family
ID=3418808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US1728094D Expired - Lifetime US1728094A (en) | Eebt available |
Country Status (1)
Country | Link |
---|---|
US (1) | US1728094A (en) |
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0
- US US1728094D patent/US1728094A/en not_active Expired - Lifetime
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