PL104699B1

PL104699B1 - COATING-REFINING AGENT FOR MELTING ALUMINUM OR ITS ALLOYS

Info

Publication number: PL104699B1
Application number: PL18998176A
Authority: PL
Priority date: 1976-05-28
Filing date: 1976-05-28
Publication date: 1979-08-31

Description

Przedmiotem wynalazku jest srodek pokrywajaco rafinujacy do topienia aluminium lub jego stopów, który ma na celu odizolowanie cieklego metalu od atmosfery pieca oraz absorpcje zanieczyszczen.The present invention relates to a coating and refining agent for melting aluminum or its alloys its purpose is to isolate the liquid metal from the furnace atmosphere and absorb impurities.

Znany srodek pokrywajaco-rafinujacy do topienia aluminium lub jego stopów zawiera w swym skladzie ciezarowo 30-55% chlorku sodu, 30-55% chlorku potasu, 5-20% kriolitu, 1-10% fluorytu oraz 1-10% fluorku sodu. Srodek ten spelnia swa role w temperaturach nizszych, natomiast zastosowanie wyzszych temperatur przegrzania rzedu 750-850°C, co ma miejsce w piecach plomiennych, powoduje bardzo intensywne parowanie uzytych srodków, praktycznie uniemozliwiajac ich stosowanie.A known coating-refining agent for melting aluminum or its alloys contains in its composition by weight 30-55% sodium chloride, 30-55% potassium chloride, 5-20% cryolite, 1-10% fluorspar and 1-10% fluoride sodium. This measure fulfills its role at lower temperatures, while the use of higher temperatures overheating of 750-850 ° C, which takes place in flame furnaces, causes very intense evaporation measures used, practically preventing their use.

Celem wynalazku jest opracowanie srodka pokrywajaco-rafinujacego do topienia aluminium lub jego sto¬ pów, wykazujacego dobre wlasnosci pokrywajaco-rafinujace.The object of the invention is to provide a coating-refining agent for melting aluminum or its alloy half, showing good covering and refining properties.

Istota wynalazku jest srodek pokrywajaco-rafinujacy, zawierajacy ciezarowo 25-50% kriolitu, do 60% chlorku potasu, do 60% chlorku sodu, oraz 5-40% fluorytu, przy czym uziarnienie tych skladników nie przekra¬ cza 1,5 mm.The essence of the invention is a coating-refining agent, containing by weight 25-50% of cryolite, up to 60% potassium chloride, up to 60% sodium chloride, and 5-40% fluorspar, with the particle size of these components not exceeding 1.5 mm.

Srodek pokrywajaco-rafinujacy, wedlug wynalazku, zapewnia dobre pokrycie cieklego metalu i intensywna absorpcje zanieczyszczen tlenkowych. Ponadto srodek ten jest odporny na wysokie temperatury przegrzania, wystepujace podczas topienia metalu w piecach, w których nastepuje nagrzewanie wsadu metalowego poprzez warstwe zuzla, na przyklad w piecach plomiennych.The coating-refining agent, according to the invention, provides good coverage to the liquid metal and intense absorption of oxide pollutants. In addition, this agent is resistant to high overheating temperatures, occurring during the melting of metal in furnaces in which the metal charge is heated by a layer of decomposition, for example in flame furnaces.

Przyklad I. Srodek pokrywajaco-rafinujacy, w sklad którego wchodzi ciezarowo: kriolitu -40% chlorku sodu - 40% fluorytu - 20% zastosowany w ilosci 0,6% w stosunku do ciezaru wsadu metalowego, zwieksza wlasnosci wytrzymalosciowe o okolo 20% oraz wydajnosc o okolo 9%.Example I. Coating-refining agent, the composition of which is by weight: cryolite -40% sodium chloride - 40% fluorite - 20% used in the amount of 0.6% in relation to the weight of the metal charge, increases the strength properties by about 20% and the efficiency by about 9%.

Przyklad II. Srodek pokrywajaco-rafinujacy o skladzie: kriolitu - 42% ciezarowych chlorkusodu - 43% ciezarowych fluorytu - 15% ciezarowych2 104699 zastosowany w ilosci 0,6% w stosunku do ciezaru wsadu metalowego, zwieksza wlasnosci wytrzymalosciowe o okolo 30% oraz zwiekszenie wydajnosci o okolo 12%.Example II. Coating-refining agent with the following composition: cryolite - 42% of the weight sodium chloride - 43% by weight fluorite - 15% of the weight2 104 699 used in the amount of 0.6% in relation to the weight of the metal charge, increases the strength properties by about 30% and an increase in efficiency of about 12%.

Claims

1. Patent claim Coating-refining agent for melting aluminum or its alloys, containing cryolite, sodium chloride, potassium chloride and fluorspar, characterized in that it contains by weight 25-50% cryolite, up to 60% potassium chloride, up to 60% sodium chloride and 5-40% of fluorspar, the grain size of these components does not exceed 1.5 mm. Wash. Typographer. UP PRL. Mintage 120 + 18 Price PLN 45