A discussion: Problems of the use of torch guniting for repair of the linings of thermal equipment and production of block refractory parts. Influence of refractory structure on the indices of torch guniting

Refractories ◽  
1988 ◽  
Vol 29 (5-6) ◽  
pp. 382-386
Author(s):  
O. A. Ryzhov ◽  
L. N. Ertseva ◽  
E. I. Rukhtaeva ◽  
E. A. Algunova ◽  
E. I. Ezhov
Keyword(s):  
Torch Guniting ◽  
Refractory Structure ◽  
Thermal Equipment

A discussion: Problems of the use of torch guniting for repair of the linings of thermal equipment and production of block refractory parts. Features of lining wear of chambers for dry quenching of coke

Refractories ◽  
1987 ◽  
Vol 28 (5-6) ◽  
pp. 341-343
Author(s):  
A. A. Shershnev ◽  
Yu. V. Rusakov ◽  
G. F. Kulichkov ◽  
M. S. Kruchinin ◽  
V. A. Naumkin ◽  
...  
Keyword(s):  
Torch Guniting ◽  
Thermal Equipment ◽  
Dry Quenching Of Coke ◽  
Dry Quenching

Torch guniting of open-hearth roof local burns

Refractories ◽  
1983 ◽  
Vol 24 (5-6) ◽  
pp. 249-253
Author(s):  
O. N. Chemeris ◽  
I. P. Tsibin ◽  
I. A. Yusefovskii ◽  
V. S. Novikov ◽  
V. A. Korotkii ◽  
...  
Keyword(s):  
Open Hearth ◽  
Torch Guniting

Equipment for thermal process

2020 ◽  
pp. 10-23
Author(s):  
D.V. Novikov
Keyword(s):  
Thermal Treatment ◽  
Research And Development ◽  
Thermal Process ◽  
New Products ◽  
Minimal Cost ◽  
Multiple Use ◽  
Thermal Equipment ◽  
Practical Research ◽  
The World ◽  
Vacuum Furnaces

The demand for efficient and qualitative thermal treatment makes certain requirements to the thermal equipment. The thermal equipment, that ideally corresponds to the assigned task of modern production facilities, is vacuum furnaces. The modern production requirements are the boundary conditions for the equipment manufacturers, focusing them on the need for all in one equipment capable of efficient wide production maneuvering, to ensure the possibility of developing and producing new products at minimal cost. As a result of practical research and development, focusing on the world experience and the real need for operation, the Sistem Teknik's article presents vacuum thermal equipment for multiple use – All in one. The equipment is controlled automatically, all parameters are regulated by the process master controller in compliance with the programmed cycle.

scholarly journals Design of Magnesia–Spinel Bricks for Improved Coating Adherence in Cement Rotary Kilns

Ceramics ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 652-666
Author(s):  
Graziella Rajão Cota Pacheco ◽  
Geraldo Eduardo Gonçalves ◽  
Vanessa de Freitas Cunha Lins
Keyword(s):  
Formation Mechanism ◽  
Firing Temperature ◽  
Essential Role ◽  
Refractory Lining ◽  
Refractory Structure ◽  
Prolonged Operation ◽  
Magnesia Spinel ◽  
Coating Formation ◽  
Rotary Kilns ◽  
Coating Formation Mechanism

It is well known that doloma bricks present better coating adherence than magnesia–spinel bricks when applied in cement rotary kilns, which is related to the different coating formation mechanism. The coating has an essential role in prolonged operation by protecting the refractory lining; thus, it is important to improve its adherence on magnesia–spinel refractories. The objective of this investigation is to study different compositions of magnesia–spinel bricks, achieved by varying additives used (calcined alumina, limestone, hematite and zirconia) and firing temperature (1500 °C and 1700 °C), to enhance the coating adherence measured by the sandwich test. The results have pointed out that the use of higher firing temperature contributes positively to physical adherence due to well-sintered refractory structure and elevated permeability, attaining coating strength superior to 2 MPa. For the chemical adherence, the addition of 2 wt.% of limestone increased the coating strength to 3 MPa, but resulted in a drop in hot properties. In this context, the most suitable approach to improve adherence of clinker coating and maintain hot properties in suitable levels is to increase the firing temperature.

scholarly journals Researches on development of alumina-chromia-zirconium silicate refractories containing 60 % Cr2O3

2020 ◽  
Vol 120 ◽  
pp. 12-28
Author(s):  
P. O. Kushchenko ◽  
V. V. Primachenko ◽  
I. G. Shulyk ◽  
Yu. Ye. Mishnyova ◽  
K. I. Kushchenko ◽  
...  
Keyword(s):  
Corrosion Mechanism ◽  
Pressing Method ◽  
Refractory Structure ◽  
Oxide Addition ◽  
Zirconium Silicate ◽  
Cold Crushing Strength ◽  
Cr2o3 Content ◽  
Corrosive Effect ◽  
Dry Pressing ◽  
Shock Resistance

Researches of a branch composition and firing atmosphere influence on structure and properties of pressed alumina-chromia-zirconium silicate refractories with 60 % Cr2O3 content were carried out. The optimal branch composition which after firing in oxidizing atmosphere provides obtaining of samples with open porosity 24.8 %, apparent density 3.46 g/cm3, cold crushing strength 78 N/mm2 and thermal shock resistance by 950 ºС — water — 7 thermal cycles was established. The phase composition of samples was determined. It has been shown that, firing in a reducing atmosphere, as well as titanium oxide addition, have no significant effect on samples properties. Corrosion resistance comparative researches of alumina-chromia-zirconium silicate refractories with 60 % Cr2O3 content and refractory brand KHTSS-30 with 30 % Cr2O3 content to glass «E» and basalt melts by crucible method at a temperature of 1580 °C with an exposure time of 8 hours were carried out. It has been established that, glass «E» and basalt impregnate refractories, moreover for samples with the developed optimal composition the impregnation depth was the smallest in comparison with samples of other compositions. The corrosion mechanism has been established, which consists in the penetration of glass «E» and basalt melts into refractory with further dissolution of corundum grains in them. Sintered Cr2O3 and solid solutions based on it in the composition of samples prevent corrosion, reducing the interaction area of melts with corundum grains, and when exposed to basalt melt, also forming spinelid with its components, which slows down further penetration of melt into refractory structure, thereby reducing its corrosive effect on the refractory. Based on the obtained results, a technology of a new domestic type of product (alumina-chromia-zirconium silicate refractories with 60 % Cr2O3 content manufactured by semi-dry pressing method) was developed.

Software for calculations of heat and mass exchange in torch guniting

Refractories ◽  
1985 ◽  
Vol 26 (11-12) ◽  
pp. 686-689
Author(s):  
A. A. Shershnev ◽  
E. I. Ezhov ◽  
N. A. Lebedinskaya ◽  
E. F. Mosin ◽  
E. P. �ntin
Keyword(s):  
Mass Exchange ◽  
Torch Guniting ◽  
Heat And Mass Exchange
Sign in / Sign up

Export Citation Format

Share Document