MODERN TENDENCIES OF THE PAINTWORK PRODUCTION APPLICATION IN MACHINE-BUILDING PRODUCTION

The data is generalized and the tendencies of using of organic solvents in 2001-2005 as compared to the period of 1997-2000 are determined in the present work

PROSPECTS FOR THE USE OF WASTE OILS AS ALTERNATIVE FUEL IN TECHNOLOGICAL PROCESSES OF MANUFACTURING OF CASTINGS AND FOUNDRY MOLDS

Quantitative and qualitative composition of the gas emission has been investigated. Quantity of CO, СО2, NOx, О2, paraffin hydrocarbons and benzene derivatives in the reaction zone depending on the duration of the process and temperature 400–800 ºС has been determined. The list of organizations utilizing waste oils as alternative fuel is presente

Extraction from aqueous solutions ions of iron and lead by filter loading, created on the basis of steel melting slag

The aim of the present paper is investigation of removal of Fe3+ and Pb2+ ions from aqueous media by material on the basis of steel melting slag. It has been established that the process of water purification from Fe3+ and Pb2+ ions by this material proceeds by a mixed mechanism both due to the formation of slightly soluble silicates and also due to the formation of hydroxides. When the filtration rate varies from 2 to 10 column volumes per hour, the percentage of sorption remains within 91,5–99,8%. The most optimal filtration rate is 6 column volumes per hour. Material on the basis of steel melting slag absorbs of Fe (III) up to 5 mg-eq/g and Pb (II) 0.64–1.27 mg-eq/g

Joint extraction of nitrate ions and of iron ions by the filter material obtained on base of steel slag

The extraction of Fe3+ ions and ion nitrate from aquatic solutions by a material obtained on the base of steel slag is studied in the article.The residual content of Fe3+ ions in the dynamic filtration mode decreased from 0.19 mg/dm3 to 0.08 mg/dm3

THE EFFECT OF CHEMICAL TREATMENT OF RECYCLED WATER IN THE PRODUCTION OF MINERAL WOOL ON ITS SALINITY AND LIGHTNESS

In progress to assess the impact of chemical treatment of recycled water in the production of mineral wool, its salinity and the degree of clarification found that the most suitable reagent to achieve the objectives is a 25% aqueous ammonia solution. It is shown that the optimum quantity of ammonia to initiate the process of deposition is in the range of 4–6 ml/dm3, lower number gives a noticeable lightening of recycled water and reduction of solids, a larger leads to a re-dissolution of already formed sludge and therefore to reduce the share of bleached water and increase the content of dissolved salts.Installed three stage character of the process of interaction of ammonia and recycled water. It is revealed that the deposition process in the recycling system water – ammonia at the initial stage limits the chemical stage of nucleation (the formation of a crystalline precipitate), followed by reaction at the interface (the formation on the surface of the original germs of continuous product

Trends in the use of bentonite clays

The paper gives a general description of the areas of application of bentonite clays. A number of deposits were evaluated in terms of their use in various technological processes. Analysis of directions of application of bentonite clays in foundry was carried out.Using the methods of X-ray and gas chromatographic analysis, scanning electron microscopy, thermogravimetry and direct adsorption-structural measurements, it is shown that materials obtained from montmorillonite and heteronuclear hydroxo complexes Cr-Cu have greater thermal stability and better sorption characteristics compared to montmorillonite fixed by mononuclear hydroxo complexesUsing montmorillonite modified with heteronuclear hydroxo complexes Cr-Cu with the best adsorption-structural parameters and zeolite NCVM, a laboratory batch of mixed adsorbent catalysts has been developed.This material has been studied in deep vapor oxidation processes of low concentrated organic substances such as acetone, toluene, ethyl acetate, ethanol, butanol and butyl acetate.The conversion rate on the mixed adsorbent catalysts for the studied adsorbates was found to be 94.9–97.7 (average 96.2 %)