Dinas products for blast furnace regenerators

Bulakh, V. L.; Usatikov, I. F.; Gubko, I. T.; Naginskii, M. Z.

doi:10.1007/bf01286264

Refractories

1974

DOI: 10.1007/bf01286264

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Dinas products for blast furnace regenerators

V. L. Bulakh

I. F. Usatikov

I. T. Gubko

et al.

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1987

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“…The distinguishing features of their method of production are the use as the original basic raw material of ground crystalline quartzites (finer that 3-mm fraction and tube mill ground) without the addition of dinas broken material and the use as the mineralizer of calcium and iron oxides in a ratio of I:I. The mineralizers are added based on obtaining dinas with an iron oxide content of not less than 2%, which provides the maximum regeneration and the minimum loosening of the dinas in firing [5,6].…”

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Highly effective thin-walled hexagonal checker parts for blast furnace hot-blast stoves

et al. 1987

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One of the basic methods ofreducing the coke consumption per ton of iron melted is increasing the temperature of the hot blast supplied to blast furnaces. The type of checker parts for hot blast stoves providing the most effective heat exchange during service is of great value.At present the basic form of blast furnace hot-blast stove checkerwork is a lining of hexagonal parts with 40-mm-diameter cells, a minimum wall thickness between the cells of 27 mm, and a specific heating surface of 32.7 m2/m s, which is 31.5% greater than a typical lining with 45 • 45 nun cells of No. 75 rectangular parts to GOST 20901-75. The high specific heating surface of hexagonal checker parts makes it possible to increase the capacity of the hot-blast stoves without changing their dimensions and to increase the blast heating temperature by 50~ with the same temperature below the dome. Large-scale production has been organized of No. 80 dinas and aluminosillcate hexagonal checker parts with different AI203 contents and a specific heating surface of 32.7 m2/m 3 to GOST 20901-75 [1-3].On the basis of a calculation and theoretical analysis the All-Union Scientific-Research Institute for Metallurgical Thermal Engineering has developed a new form of hexagonal thinwalled checker parts with optimum dimensions of cell diameter 30 mm, thicknesses of the wall between the cells 17.5 mm, and specific heating surface of 48 m2/m 3, which is 47% greater than for the standard hexagonal checker parts. The use of thin-walled checker parts makes it possible to increase the heating temperature of the blast by 50-70~ in comparison with normal hexagonal ones without changing the overall dimensions of the hot-blast stoves, which provides a significant saving. Figure i shows the normal and thin-walled checker parts. The lock joints (tapered projections and depressions) in a normal hexagonal checker part, which provide the possibility of making rows of staggered checkers, are located coaxially with the holes. Such a location of the lock joints was impossible to use in the design of the thin-walled checker parts as the result of the sharp decrease in the support surface of the parts, in connection with which a new lock joint also in the form of truncated projection and depression cones but located between the cells was developed.Normally the checkerwork of hot-blast stoves is made of five forms of parts, dinas, MKV-72, ShV-42, ShV-37, and SHY-28. The height of the zone of each form of refractory depends upon the temperature distribution over the height of checkerwork [4]. In the experimental hot-blast stoves with thin-walled hexagonal checkerwork, three forms of refractories were used: dinas, MKV-72, and ShV-37. This article presents the results of development of the parameters of the method and introduction of large-scale production of thin-walled hexagonal checker parts of these types of refractories. The parameters of the method of production of thin-walled rectangular parts were developed in the Experimental Plant of the Ukrainian Scientific-Research Inst...

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Highly effective thin-walled hexagonal checker parts for blast furnace hot-blast stoves

et al. 1987

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Dinas products for blast furnace regenerators

Cited by 1 publication

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Highly effective thin-walled hexagonal checker parts for blast furnace hot-blast stoves

Highly effective thin-walled hexagonal checker parts for blast furnace hot-blast stoves

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