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The author: Okunev Vladimir Makarovich
Dissertation theme: Exploration and working out of technics of hydrometallurgical processing of salt aluminium slags.
The dissertation description: Exploration and working out of technics of hydrometallurgical processing of salt aluminium slags.: Dis.... A Cand.Tech.Sci.: 05.16.03 Moscow, 1979 171 p. RSL OD, 61:80-5/2470
Year: 1979

The full text of theses can be found in printed and electronic form. 141400, Khimki, Moscow Region., St. Library, 15. How to get to the station. Underground "River Station", then bus. 344, 368 to the bus stop. "Library Street."
3.2.1.

the TABLE of contents


The river 4
1. THE CONDITION OF THE QUESTION OF PROCESSING ALSHINIENJA SHMKOV AND RESEARCH PROBLEMS?
mechanical stressing of metal 7
Thermal processing of slags 10
gidrometallurgicheekaja processing of slags..... 18
Research problems 27
2. STUDYING of PHYSICO-CHEMICAL GROUNDS And WORKING out the FLOOR-MAT¬ MATICHESKY SAMPLE PIECES OF OPTIMIZATION WATER SHSHCHELACHJVANJJA SLAG 28
2.1. Studying of kinetics of process 28
the Technique and results of experiments 28
Treatment of results of experiments 37
2.2. Working out of mathematical sample pieces of optimisation Water vatting of slag 45
the Technique of holding of experiments 45
Results chetyrehfaktorjaogo experiment, their discussion and mathematical treatment 53
2.3. Conclusions under the head...; 61
3. EXPLORATION And WORKING out of TECHNICS nepreshvnogo COUNTERFLOW VATTING SHJAAKA IN TUBULAR APPA¬ RATE 63
3.1. Studying of influence of technology factors on Parametres continuous counterflow vyshchelachi¬ vanija in the semiindustrial tubular device. 64
the Technique of holding of experiments 64
Results of experiments and their discussion... 67
3.2. Industrial tests and working off of the optimum Modes of a counterflow vatting of slag... 72
the Technique of holding of experiments 72
the Vatting of large slag 75
the Vatting of small slag, 77
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P.
3.2.4. Discussion of results of experiments 88
3.3, Conclusions under chapter 94
4. STUDYING of UPHOLDING of FINE PULPS FROM SHSHCHELACHIVAVIJA SLAG And
SHBOR FLOKULJANTA 97
the Technique of holding of experiments 97
Results of experiments and them obsuadanie 100
Conclusions under chapter 107
5. ^sledovanie And WORKING out of OPTIMUM MODES SHPA ^
RIVANSH VODNO-HLORIDNYH SOLUTES In DEVICE KS... 109
the Technique of holding of experiments BUT
Results of experiments and them obsuzdejaie 115
the Conclusion under chapter 119
e. STUDYING of PROPERTIES And POSSIBILITY of USE¬ of the MIX of SALTS RECYCLED FROM SLAG As the FLUXING STONE AT
to FUSION 122
6.1. Studying of properties of the recycled fluxing stone 122
6.2. Exploration of influence of preliminary opening-up Fluxing stone on its efficiency 126
the Technique of holding of experiments 127
Results of experiments their discussion... 131
6.3. Industrial tests recycled flvjua. 136
6.4. BIvodn under chapter 138
7. CORES JSHOda ON WORK 140
the LITERATURE 143

INTRODUCTION


the CPSU and the Soviet government pay the big attention vopkrosam wildlife management and rational use natural reksursov. Work on prevention or essential snikzheniju pollution and zasolenija soils, superficial and underground waters, atmosphere is one of the major state problems of L, 2/.
Now, despite the big successes reached last years by an iron and steel industry in razrzbogke of new master schedules, the equipment and increase of culture of manufacture, formation of a considerable quantity of production wastes which recyclings and nanoksjat the big damage are not exposed to the nature still takes place.
To such waste the slags formed at proizvodkstve of secondary aluminium alloys in reflective ovens concern, in kotokryh the breakage and a waste of aluminium alloys fuse with application bolshokgo quantities (to ZS # to weight of mix material) a fluxing stone, which ground javkljaetsja a mix of chlorides of a potassium and sodium with a small amount hlokridov calcium and a magnesium.
these slags contain 50-70 # chloride salts, Ž-20 ^ aljuminiekvogo an alloy in the form of large sweat balls, to 3QJS okisi aluminium, to § % of dioxide of silicium/3/, and also a significant amount melkokdispersnogo metal in the form of particles in the size less than I mm. Them obrazokvanie reaches 4Ń $ to expulsion of secondary aluminium alloys in otkrazhatelnyh ovens. Quantity formed shshkov in connection with rosktom manufactures of aluminium and aluminium alloys annually vozrasktaet. So, for last ten years the volume of manufacture of aluminium alloys from a secondary raw material has increased more, than in 2,5 times, and by 1990 will increase more than in 3 times in comparison with 1975.
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Now such slags are not processed and vyvozjatksja in a sailing. The territories occupied with slag mucks »annually sharply increase. In sailings slags under the influence of atmospheric conditions quickly decay, chlorides containing in THEM, rastvokrjajas, pollute and zasoljajut soil, superficial and podevmnye waters, putting the big damage to the surrounding nature in extensive territory round slag mucks. In the course of breaking-up of slags harmful gases (ammonia, hydrogen sulphide, hydrogen, etc.) are allocated Polluting atmosphere.
in this connection a question of the organisation of processing of slags for the purpose of liquidation of slag mucks and wildlife management javljaeteja rather akktualnym. Processing of slags will allow to recycle also and iskpolzovat valuable components containing in them, i.e. predstavkljaet doubtless interest and from the point of view of economy.
with slags it is taken out to a sailing and the metal considerable quantity is irrevocably lost. In sailings after dissolution of a salt part of slag it is quite often possible to find out blocks of metal in weight to 1,5 t, koktorye are formed as a result of subsidence on a bottom shlakovnitsy zahvakchennyh at disposal of liquid slag of the oven of large drops of liquid metal thanks to a difference of density of these particles and environments. After slag solidification the big congestions of metal in a ground part shlakkovoj blocks are not visible, since are coated by a slag crust, and come to light only after slag shattering.
the organisation of processing of slags allowing? To return in proizvodkstvo these monolithic pieces of metal, and also metal containing in slags in the form of the large sweat balls taken at metallurgical approbation of slag, and a significant amount of disperse metal in the form of particles in the size less than 0,5-1 mm, not taken at metalklurgicheskom approbation which in sailings very quickly oxidise -
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sja also are irrevocably lost. Except metal and salts expediently isjaolzovat oxides of aluminium containing in slags and silicium.
simple calculation shows, that in the slag taken out to a sailing containing, for example, 10$ of aluminium in the form of large sweat balls, 60$ soluble salts, 20$ okisi aluminium, the contents of last in rekzultate full oxidising of aluminium sweat balls will raise to 34,6$, and in a product, the received ambassador of natural dissolution under the influence of an atmospheric precipitation of salts containing in slag, dokstignet 78,7$. It is known, that the richest bauxites, ispolzuekmye as aluminium ore, contain only 49-52$ okisi aljukminija, other kinds of raw materials for manufacture of primary aluminium are even poorer/4/. Hence slags taken out to a sailing are bokgatejshim the complex raw materials which practically are not containing ballast components.
Taking into account that the big means are spent for extraction of bauxites, and manufacture of aluminium from a secondary raw material in 1,5 times more cheaply and demands in 4 times of less capital investments, than its manufacture from primary raw materials/5/, to take out slags to a sailing at least thriftlessly. The organisation of processing of slags will give the chance to return besides wildlife management to a national economy a considerable quantity lost now metal and other valuable components that will provide the big economic benefit.


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