Forging furnace with thermochemical waste-heat recuperation by natural gas reforming: Fuel saving and heat balance

This paper considers thermochemical recuperation (TCR) of waste-heat using natural gas reforming by steam and combustion products. Combustion products contain steam (H₂O), carbon dioxide (CO₂), and ballast nitrogen (N₂). Because endothermic chemical reactions take place, methane steam-dry reforming creates new synthetic fuel that contains valuable combustion components: hydrogen (H₂), carbon monoxide (CO), and unreformed methane (CH₄). There are several advantages to performing TCR in the industrial furnaces: high energy efficiency, high regeneration rate (rate of waste-heat recovery), and low emission of greenhouse gases (CO₂, NO_x). As will be shown, the use of TCR is significantly increasing the efficiency of industrial furnaces – it has been observed that TCR is capable of reducing fuel consumption by nearly 25%. Additionally, increased energy efficiency has a beneficial effect on the environment as it leads to a reduction in greenhouse gas emissions.     

Optimizing the selective flocculation of coal by means of a selective reagent

The need to improve coal enrichment stems from the sharp deterioration in the coal being enriched (increasing ash and moisture content, content of small classes, rock content, etc.), which results from the widespread mechanization of mining operations, the development of high-ash deposits, and dust suppression [1].     

Production of hot-dipped tin plate 0.45–0.50 mm thick

Magnitogorsk Metallurgical Combine. Translated from Metallurg, No. 2, p. 37, February, 1991.     

Hepatic and pancreatic effects of polyenoylphosphatidylcholine in rats with alloxan-induced diabetes

In neonatally allylestrenol treated animals in adult age a single benzpyrene treatment significantly decreases the female and significantly increases the male rat's sexual activity. Three month old females display the negative sexual behavioral effect of neonatal allylestrenol treatment less than the six month old ones. The benzpyrene treatment in adult age decreases the sexual activity of male rats. The experiments call the attention to the modifying effect of perinatal steroid treatments to similar exposure in adult age.     

Approximate Method for Optimization of the Geometric Structure of Polyatomic Systems

A compact method of calculation for solving a fundamental problem in structural chemistry — the problem of optimizing the geometric structure of molecular systems — is proposed. Solution of this problem will allow predicting a number of properties of polymer systems based on the existence of a structure—property correlation. It should be noted that the proposed method allows performing all calculations in analytical form.     

Degradation of protective coatings of the Ni-M-Cr-Al-Y system due to sulfide-oxide corrosion

The results of testing corrosion resistance longevity in coatings of the Ni-M-Cr-Al-Y system at temperatures of 800, 850, and 900°C are given. The kinetic dependences of corrosion are determined, successive stages of the degradation of coatings are identified, and the effect of alloying coatings with chromium and aluminum on their degradation and durability is established.     

Determination of the electrical conductivity of heat-resistant concretes

The problem of the electrical conductivity of heat-resistant concretes and bonding agents is considered and a method for determining this parameter is suggested. In addition to the thermal resistivity, the electric conductivity is a factor affecting the lifetime of lining materials for high-temperature devices. The problem is especially urgent in electric heaters. Translated from Ogneupory, No. 7, pp. 25–26, July, 1994.     

Use of biocompatible calcium-phosphate glass ceramic BGC in surgical treatment of maxillary cysts

The possibility of using the granulated form of biocompatible material made of calcium-phosphate glass ceramic BGC for treatment of maxillary cysts was demonstrated.