PL33336B1 - A method of magnetic enrichment of iron ores and other minerals containing iron - Google Patents
A method of magnetic enrichment of iron ores and other minerals containing iron Download PDFInfo
- Publication number
- PL33336B1 PL33336B1 PL33336A PL3333646A PL33336B1 PL 33336 B1 PL33336 B1 PL 33336B1 PL 33336 A PL33336 A PL 33336A PL 3333646 A PL3333646 A PL 3333646A PL 33336 B1 PL33336 B1 PL 33336B1
- Authority
- PL
- Poland
- Prior art keywords
- iron
- enrichment
- ores
- minerals containing
- magnetic enrichment
- Prior art date
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 9
- 229910052742 iron Inorganic materials 0.000 title claims description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims description 3
- 239000011707 mineral Substances 0.000 title claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005054 agglomeration Methods 0.000 claims description 2
- 230000002776 aggregation Effects 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims 1
- 238000001354 calcination Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 229910017135 Fe—O Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910021646 siderite Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Description
Magnetyczne wzbogacanie niemagnetycz¬ nych rud zelaznych, a mianowicie hematy- tów i limonitów (brunatnego, darniowego i tym podobnych), wymaga uprzedniego ich rozdrobienia oraz prazenia w osrodku redukujacym (wegiel, gazy palne i tym po¬ dobne). Przez redukcje Fe-O na Fe^O (ma¬ gnetyt) ruda prazona nabiera wlasciwosci magnetycznych. Po wzbogaceniu przez od¬ dzielanie elektromagnetyczne drobna rude podaje sie aglomeracji (spiekaniu).W calym tym procesie najwieksza trud¬ nosc przedstawia prazenie redukcyjne w piecach róznej konstrukcji. Wlasnie ta trudnosc przyczynia sie do nierentownosci na ogól wzbogacania rud zelaznych, wyma¬ gajacych redukcji; zbudowane na tej zasa¬ dzie zaklady przeróbcze zwykle byly za¬ rzucane juz po krótkim czasie swego ist¬ nienia.Wieloletnie badania, przeprowadzone w Zakladzie Przeróbki Mechanicznej Akade¬ mii Górniczej, wykazaly, ze unikniecie tej trudnosci jest mozliwe przez zastosowanie sposobu, bedacego przedmiotem wynalaz¬ ku niniejszego i majacego na celu wyelimi¬ nowanie w ogóle prazenia w osrodku redu¬ kujacym.Sposób ten polega na tym, ze material surowy, przeznaczony do wzbogacania zo¬ staje poddany wstepnej aglomeracji za¬ miast prazenia w osrodku redukujacym. Po rozkruszeniu otrzymanego aglomeratu ma-terial latwo ulega wzbogaceniu przez od¬ dzielanie elektromagnetyczne, po czym produkt magnetyczny zostaje ponownie za- glomcrowany. » Proces ten z powodzeniem moze byc sto¬ sowany równiez i do innych rud zelaz¬ nych, które dla przeprowadzenia w stan magnetyczny — w przeciwienstwie do wy¬ zej opisanych — wymagaja prazenia w o- srodku nie redukujacym, lecz utleniaja¬ cym, jak to ma miejsce np. w przypadku syderytu (FeCOs).Dalszym zastosowaniem omawianego sposobu jest oddzielanie zwiazków zelaza od innych mineralów uzytecznych, w któ¬ rych obecnosc zelaza jest szkodliwa.Sposób wedlug wynalazku niniejszego posiada nastepujace zalety: zostaje wyeli¬ minowana koniecznosc stosowania pieców do prazenia redukujacego oraz uzyskuje sie znaczne zmniejszenie kosztów wzboga¬ cania, wskutek czego w wielu przypadkach oplaci sie eksploatowac rudy, a nawet i piaski zelaziste, które przy zastosowaniu dotychczasowych sposobów wzbogacania uwazane byly jako nie nadajace sie do wy¬ dobycia górniczego. PLMagnetic enrichment of non-magnetic iron ores, namely hematites and limonites (brown, turf and the like), requires their prior grinding and calcination in a reducing agent (coal, flammable gases, etc.). The roasted ore acquires magnetic properties by reducing Fe-O to Fe2O (magnetite). After enrichment by electromagnetic separation, the fine ore is subjected to agglomeration (sintering). In this whole process, the greatest difficulty is represented by reduction calcination in furnaces of various designs. It is precisely this difficulty that contributes to the ineffectiveness of the generally enrichment of ferrous ores in need of reduction; Processing plants built on this principle were usually abandoned after a short time of their existence. Many years of research carried out in the Department of Mechanical Processing of the Mining Academy have shown that avoiding this difficulty is possible by using the method being the subject of the invention. The method is based on the fact that the raw material to be enriched is pre-agglomerated instead of calcining in the reducing agent. After crushing the obtained agglomerate, the material is easily enriched by electromagnetic separation, after which the magnetic product is again glomerated. »This process can also be successfully applied to other ferrous ores which, in contrast to the above-described ones, require calcination in a non-reducing, but oxidizing medium, such as This is the case, for example, in the case of siderite (FeCO.sub.2). A further application of the present process is the separation of iron compounds from other useful minerals in which the presence of iron is detrimental. The method according to the present invention has the following advantages: the need to use a roasting furnace is eliminated. reduction and a significant reduction in the cost of enrichment is achieved, as a result of which in many cases it is profitable to mine ores and even iron sands, which were considered unsuitable for mining using the existing methods of enrichment. PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL33336B1 true PL33336B1 (en) | 1947-09-30 |
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