PL48754B1 - - Google Patents

Description

Preference: Published: 5. Xli. 1964 48754 Ki. I a, 41 MKP B 03 b? / «0 UKD LIBRARY U r zeó a: -w r e n t c. V e g ol Contributors of the invention: prof. Dr. Kornel Wesolowski, Dr. Michal Ryczek Patent owner: Warsaw University of Technology (Department of Metallurgy), Warsaw (Poland) Method of obtaining metallic iron or its alloys from hard coal or brown coal when burning in liquid zuzel boilers Patents No. 45201, 46694, 47421, 47422 and 48254 precisely define the possibility of obtaining iron concentrates in the form of magnetic oxide or resublimated iron, or an iron-rich alloy made of volatile carbonyls. Further research on this issue allows to obtain iron or its alloys in half. of the metallic form in the liquid slag of hard or brown coal burned in the liquid slag boilers. The composition of the coal used for combustion is adjusted so that the melting point of the slag is higher than the melting point of iron or its alloys, preferably by about 100-150 ° C To protect the iron or its alloys from oxidation, small amounts of carbon are added to the normally burnt carbon with a high ignition temperature, such as coke coal, lean coal, semianthracite or anthracite - to maintain a reducing environment in the liquid slag. The iron content of the coal ash should be at least 10%. The composition of carbon should be be so determined that the obtained slag is high-calcium, in which CaO: SiO2 = approx. 1: 1. Such composition of the slag is similar to the composition of the blast furnace slag. In order to lower the melting temperature of this slag, it is necessary to introduce a small amount of high-alkali carbon, the composition of which is a mixture of CaO + Na ^ O and others. The composition of the carbon can also be set in such a way that the obtained kernel is high-flank, in which CaO: SiOz = approx. 1: 2. is similar to the composition of the slag. For a possible increase in the melting point of this slag, it is necessary to burn the coal and to add a small amount of carbon containing barium or strontium, and therefore such a carbon which The slag contains BaO or SrO. The scale of carbon is also determined so that the obtained slag is saturated with iron with a composition similar to the composition of basalt (orthosilicate). To obtain such a slag, the burnt carbon must have a large amount of magnesium, and zuzel obtained during combustion - contain MgO. In such a case, the iron or its alloys are separated from the iron, which is suitable for casting in molds as melted basalt. The droplets of iron or its alloys formed during the combustion of coal are collected in larger chunks in rotary drums or other devices, still in the liquid state, and this in order to form larger and easily separating lumps of metal. The resulting iron or its alloys are simultaneously a collector for various rare metals 487 543 48 754 4 and dispersed such as titanium, vanadium, gallium molybdenum, uranium and others. Iron or its alloys, depending on the composition and impurities, are still subjected to simple or complex metallurgical processing (for example refining) in order to obtain, in addition to iron, or steel, also Waste materials containing still other metals, from which they are obtained, are obtained in further metallurgical or chemical processing. PL

Claims (2)

1. Claims 1. The method of obtaining metallic iron or its alloys from coal or brown coal, fired in liquid slag boilers, characterized by selecting different types of coal and using an inert or slightly reducing atmosphere by their incinerator, they are so that the melting point of the slag is higher (preferably by 100-150 ° C) than the temperature of the iron or its alloys reduced during the process, and the iron content in the ash is at least 10%, adding small amounts of coal to the coal mixture. with a high flash point, such as lean coal, coke oven, semianthracite, anthracite, hemlock, coke, and others, and a coal mixture selected so that the ash composition varies within the limits: CaO: SiO2 = about 1: 1 with a deviation of max. + 10% and possible addition of NaO2 with other alkali or CaO: SiO2 = about 1: 2 with a deviation of max. + 10% 10 and with possible addition of BaO or SrO and the ratio (CaO + MgO) : Si02 = approximately 2: 1 zo deviation max. 10% with a CaO: MgO = 1: ratio above 1.5, with the use of rotating drums or other devices for pelletizing the formed iron droplets or its alloys. 2. The method according to claim The process of claim 1, characterized in that the resulting iron or its alloys remain in a liquid state and collect various rare and raziprcis Bome metals, such as titanium, vanadium, gallium, molybdenum, uranium and others, and to obtain them, it is separated from scrap iron or its alloys, metallurgical processing, bad metallurgical and chemical processing. 15 2059. RSW "Press", Kielce. Printed 250 copies. I3IBLIO '\ && sa ^ i ^^ i PL