Wyniki wyszukiwania - Biblioteka Nauki

1

Influence of Chemical and Mineralogical Composition of Steelmaking Slags on their Next Utilization

100%

Baricova D. , Pribulova A. , Bulko B. , Demeter P.

Hutnik, Wiadomości Hutnicze

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2018

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tom Vol. 85, nr 11

389--393

EN

The major waste products of metallurgical production are slags. The amount of steelmaking slag is about 65-150 kg per tonne of crude steel produced. At present, there is an effort to reduce the amount of slag arising, which is possible by pretreatment of pig iron, secondary metallurgy of molten steel and careful selection of batch materials. Despite all efforts, the amount of slag produced represents about 13% of the total batch. The paper focuses exclusively on primary slags from the steelmaking process in the oxygen converter and the electric arc furnace. The chemical and mineralogical composition of the steelmaking slag will be the most significant factor affecting its further potential use. Authors describes hydraulicity of slags as function of composition, and also their next utilization in concrete construction.

PL

Głównymi odpadami metalurgicznymi są żużle. Ilość żużla stalowniczego wynosi około 65-150 kg na tonę wyprodukowanej surowej stali. Obecnie dąży się do zmniejszenia ilości powstających żużli, co jest możliwe dzięki obróbce wstępnej surówki, wtórnej metalurgii stali i starannej selekcji materiałów wsadowych. Pomimo wszystkich zabiegów, ilość wytwarzanego żużla stanowi około 13% całkowitej produkcji. Artykuł koncentruje się głównie na żużlach z procesów stalowniczych z konwertora tlenowego i elektrycznego pieca łukowego. Skład chemiczny i mineralogiczny żużla stalowniczego jest najważniejszym czynnikiem wpływającym na jego dalsze potencjalne wykorzystanie. Autorzy opisują hydrauliczność żużli jako funkcję składu, a także ich kolejne wykorzystanie w konstrukcjach betonowych.

2

Comparison of possibilities the blast furnace and cupola slag utilization by concrete production

100%

Baricova D. , Pribulova A. , Demeter P.

Archives of Foundry Engineering

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2010

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tom Vol. 10, iss. 2 spec.

15--18

EN

In process of pig iron and cast iron production secondary raw materials and industrial wastes are formed The most abundant secondary product originating in these processes are furnace slag. Blast furnace slag and cupola furnace slag originates from melting of gangue parts of metal bearing materials, slag forming additions and coke ash. In general, slag are compounds of oxides of metallic and non-metallic elements, which form chemical compounds and solutions with each other and also contain small volume of metals, sulfides of metals and gases. Chemical, mineralogical and physical properties of slag determinate their utilisation in different fields of industry. The paper presents results from the research of the blast furnace and cupola furnace slag utilization in the concrete production. Pilot experiments of the concrete production were performed, by that the blast furnace and cupola furnace slag with a fractions of 0-4mm; 4–8mm; 8–16mm were used as a natural substitute. A cupola furnace slag and combination of the blast furnace and cupola furnace slag were used in the experiments. The analysis results show that such concretes are suitable for less demanding applications.

PL

W referacie przedstawiono wyniki badań w zakresie wykorzystania żużla żeliwiakowego oraz mieszaniny żużla żeliwiakowego i żużla wielkopiecowego do produkcji betonu. Stosowano trzy frakcje żużli: 0-4 mm, 4-8 mm oraz 8-16 mm jako zamienniki naturalnego kruszywa. Przeprowadzono analizę chemiczną, mineralogiczną oraz ziarnową tych żużli. Stwierdzono, że betony wyprodukowane z udziałem tych żużli, co prawda nie spełniają wymagań stawianych betonom do budowy dróg, ale mogą one być wykorzystywane w mniej odpowiedzialnych konstrukcjach budowlanych.

3

Potential cupola slag utilization in the production of concrete

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Demeter P. , Baricová D. , Pribulová A.

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2009

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tom T. 61, nr 5

13-14

EN

The paper presents results from the research of the blast furnace and cupola slag utilization in the concrete production. Pilot experiments of the concrete production were performed, by that the blast furnace and cupola furnace slag with a fractions of 0–4 mm; 4–8 mm; 8–16 mm were used as a natural substitute. A cupola slag and combination of the blast furnace and cupola slag were used in the experiments. The analysis results show that such concretes are suitable for less demanding applications.

4

Možnosti skusovenia prachov z výroby liatiny

100%

Pribulová A. , Baricová D. , Gengeľ P. , Demeter P.

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2009

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tom T. 61, nr 5

45-47

EN

A large volume of dust wastes is generated in each stage of the iron casting production. They differ in their chemical composition, morphology and granulometry. According to the chemical composition these wastes have different contents of major components i.e. metallic iron, ferrous oxide, silicon oxide, and aluminum oxide, and therefore they can be divided into tree basic categories: metallic dusts, mixed dusts and sand dusts. The aim of the experiments which are dealt with in the present paper was the fi rst group, i.e. metallic dusts. Within the foundry industry this type of dusts is mainly represented by dust from the shot blasting of iron castings and by dust from the grinding. These materials contain a high proportion of iron and therefore they are a very valuable material that is reusable in the foundry process; the condition is their conversion to compact (solid) state. Dust obtained from the shot blasting of castings was pelletized using bentonite, in the case of dust from the grinding of castings several methods of molding were tested, while it was found that the given material cannot be pelletized, but it can be used in the production of briquettes, where water glass will be used as a binder.