ATMOSPHERE POLLUTION AT STORAGE OF SLAGS OF ALUMINIUM SECONDARY PROCESSING

Thermodynamic probability of the processes of the formation of compounds of aluminum (which release in the environment by hydrolysis ammonia, acetylene, propane and hydrogen sulfide) is determined. In the article the economic loss from irrecoverable waste of aluminum and fines for emissions of air pollutants is estimated

USE OF THE ADSORPTION CATALYTIC METHOD FOR PURIFICATION OF EMISSION FORMED AT USE OF NITROGEN-CONTAINING MOLDING SANDS

The purpose of this work was studying of process of neutralization of the nitrogen-containing vapor, escaping from forming sand blends by means of adsorption-catalytic method

USE OF THE ADSORPTION CATALYTIC METHOD FOR PURIFICATION OF EMISSION OF FORMING SITES OF FOUNDRY SHOPS OF VAPORS OF PHENOL AND FORMALDEHYDE

The purpose of this article is studying of process of neutralization of the phenol and formaldehyde vapor by adsorption and catalytic method

USING OF ADSORPTIVE AND CATALYTIC METHOD FOR CLEANING OF EMISSION INTO ATMOSPHERE WHICH ARE FORMED AT USING THE NON-STICK COVERINGS CONTAINING ETHYL ALCOHOL

The article is dedicated to actual problem and is of scientific and practical interest. Purpose of this work is studying of process of the ethanol vapors neutralization by adsorption-catalytic method

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

ASSESSING THE POSSIBILITY OF USING OF ZAZHOGINSKY DEPOSIT SHUNGITE IN METALLURGY

By electron microscopy, electron microprobe, X-ray diffraction and elemental analyzes carried out the research on the distribution of chemical elements over the surface of schungite, the most typical areas of distribution of crystallographic phases on the surface of samples and their relationship

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

OBTAINMENT AND PHYSICO-MECHANICAL PROPERTIES OF THE FOAMED HEAT-INSULATING MATERIAL BASED ON ALKALI SILICATE COMPOSITION AND SHUNGITE

Physical and mechanical properties of foamed heat-insulating material based on alkali silicate composition and shungite were investigated. The studies determined the ratio of the components of the charge with which it is possible to obtain the optimal ratio of mechanical properties/thermal conductivity. Found that composite materials obtained from shungite filler, have a more porous structure (up to 76% of the volume of the material) and are more uniform distribution of pore size (from 0.11 to 0.2 mm

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 %)