Inorqanic Hiat Resistant Industrialworses as Raw Wabertal Base for Manufactureof Fare Resistant Kiln Materials

Khlystov, A. I.; Konnov, Mikhail; Vlasov, A. A.; Chernova, E. N.

doi:10.17673/vestnik.2011.04.17

Cited by 3 publications

(1 citation statement)

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“…For this purpose traditional fine-ground refractory additives are used: granular blast-furnace slag, alumina-chromium waste in the form of the dead petrochemical catalyst, chamotte, cordierite, volcanic ash, fly ash, alumina cement and other substances capable of reacting with the calcium oxide CaO. Positive results, in particular the strength increase, are provided by the addition of the sodium tripolyphosphate after its introduction into the Portland cement binders, as well as classical plasticizers of C-3 type or nanotehnogenic high-alumina sludge-waste of non-ferrous metallurgy [3][4][5].…”

Section: Methodsmentioning

confidence: 99%

Ways to improve physical and thermal performance of refractory lining materials

2017

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Abstract. Refractory lining materials, which include ceramic refractories and nonfired heat-resistant concretes, have a very short lifespan during the turnaround time measured in years and sometimes months. Therefore, increasing the service life of thermal generating units by 1.5-2 times will bring significant economic benefits. The main factor that determines the durability of refractory lining materials is the thermal resistance. It is possible to increase the thermal resistance by improving such physical and mechanical properties as strength and density. As for the ceramic refractory performance improvement, such technological methods as their structural and chemical modification by phosphate binder impregnation, as well as introduction of phosphate components into the ceramic batches during the molding process increase, in particular, their thermal stability. The use of aluminous and high-alumina cements contributes to a significant increase of not only strength, but also physical and thermal performance of heat-resistant concretes with different fillers. Switching to the use of chemical binders in the compositions of heat-resistant concretes (liquid glass with effective hardeners; silicate-block and phosphate binders) enables to develop high-heat resistant materials which do not soften in a wide range of heating temperatures from 400 ºС to 1600 ºС. The positive results on increasing the thermal resistance of heat-resistant composites can be obtained by reinforcing them with high temperature fibers.

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Section: Methodsmentioning

confidence: 99%

Ways to improve physical and thermal performance of refractory lining materials

2017

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Resource and energy saving technologies of refractory linings of thermal units

2017

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Abstract. In Russian practice, the vast majority of thermal units and other industrial furnaces are still built with the use of single-piece ceramic refractories. The purpose of research was to develop a wide range of special materials suitable for repairs of any linings of thermal units. In accordance with the purpose, this paper solved the following tasks: Selecting reactive binders used in the compositions of refractory concrete capable of structural modification of any refractory lining materials; Developing impregnating-coating compositions based on reactive binders capable of forming a protective coating with high adhesive strengthen linings; Developing compositions of refractory ramming mixtures, used for the repair of large fragments of linings and having high adhesion to any refractory lining materials; Checking the effectiveness of the technology in production environment. In this paper, we used not only standard techniques but also specially designed ones, in particular, to determine the adhesion of refractory coating to the refractory lining materials. The technology of repair works consists of application of some or all of the above solutions depending on the state of worn out lining of the thermal unit. Testing was carried out on many sintering plants of Samara region where rotary kilns are operated. The use of such chemically active substances as phosphate bonds and sodium silicate solutes in special refractory repair compositions with different functional purpose, allowed increasing the durability of liners of expanded fire clay rotary kilns as a result of reparatory works. Some items from the general technological scheme of repair works to restore the linings of heating units may be used in industrial furnaces in many industries.

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Study into the feasibility of manufacturing liquid glass using resource-saving technology

2017

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Abstract. The authors' views on the problem of resource-saving in the production of building materials are outlined, with three main modes of resource-saving indicated: the use of cheap raw materials, a reduction in the production costs, and an increase in the efficiency of the produced materials and products. The research provides information on the production and use of liquid glass in industry, including the construction industry. The theoretical substantiation of the possibility of developing a resource-saving technology for the production of liquid glass for construction purposes is given. The work provides information on promising alternative raw material components -diatomite, natural rock and black ash, industrial waste. Their properties are given as well as the justification of their effective use as raw materials. The method of preparation of the components and their mixtures, the preparation of sodium silicate through roasting, and the identification of the suitability of the obtained product for the manufacture of efficient building materials are described. Conclusions are made in regards to the feasibility of producing liquid glass using resource-saving technology.

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Inorqanic Hiat Resistant Industrialworses as Raw Wabertal Base for Manufactureof Fare Resistant Kiln Materials

Cited by 3 publications

References 0 publications

Ways to improve physical and thermal performance of refractory lining materials

Ways to improve physical and thermal performance of refractory lining materials

Resource and energy saving technologies of refractory linings of thermal units

Study into the feasibility of manufacturing liquid glass using resource-saving technology

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