The cleaning process consists of two essential stages: acid leaching followed by calcium chloride leaching The optimum conditions for extg zinc copper and indium by acid leaching were a sulfuric acid concn of 200 gL-1 a liq /solid ratio of 4:1 (mL/g) a leaching time of 2 h and a temp of 90C A Abazarpoor M Halali M Maarefvand H Khatibnezhad " Application of response surface methodology and central composite rotatable design for modeling and optimization of sulfuric leaching of rutile containing slag and ilmenite" Russian Journal of Non-Ferrous Metals Volume 54 Issue 5 September 2013 pp 388-39

US3300297A

US3300297A US37035764A US3300297A US 3300297 A US3300297 A US 3300297A US 37035764 A US37035764 A US 37035764A US 3300297 A US3300297 A US 3300297A Authority US United States Prior art keywords tantalum columbium slag sulfuric acid tin Prior art date 1964-05-26 Legal status (The legal status is an assumption and is not a legal conclusion

During leaching process different leaching media are applied (Ikiz et al 2006) These leachant include hydrochloric acid sulfuric acid ferric chloride nitric acid as well as other available oxidants Thus due to high oxidizing capacity nitric acid often preferred among the aforementioned leachants

Dec 06 2019The manganese leaching efficiency was 91 64% under the conditions of two ore mass ratio of 1:0 5 sulfuric acid concentration of 1 25 mol/L temperature of 85 C and leaching time of 2 5 h The gold extraction efficiency from the pretreatment slag reached 90 30% and was higher than that of

Copper extraction refers to the methods used to obtain copper from its ores The conversion of copper consists of a series of physical and electrochemical processes Methods have evolved and vary with country depending on the ore source local environmental regulations and other factors

Abstract: Calcification roasting–acid leaching of high-chromium vanadium slag (HCVS) was conducted to elucidate the roasting and leaching behaviors of vanadium and chromium The effects of the purity of CaO molar ratio between CaO and V 2 O 5 (n(CaO)/n(V 2 O 5)) roasting temperature holding time and the heating rate used in the oxidation–calcification processes were investigated

Recovery of cobalt nickel and copper from slags using

Note that for the purposes of these calculations all of the Co Cu and Ni in the feed slag was assumed to be in the oxidized form i e present as CoO (1 272% or 0 254%) Cu 2 O (0 563%) and NiO (2 546%) When carbon is added to the slag the various metallic elements reduce to different extents at a given level of carbon addition

Feb 01 2020SEM images of coarse slag and fine slag under different conditions a and b are respectively coarse slag original sample (CS) and fine slag original sample (FS) c is obtained by acid leaching of coarse slag (CS-AS) d is the sample obtained after decarbonize and acid leaching of fine slag (FS–C-AS) e (CS-AS-900) and f (FS–C-AS-900) are c

Jul 13 2020This optimization consisted of screening steps using a full factorial design followed by optimization The coarse fraction of BOF sludge was predominantly composed of iron in metallic form (82 5% dry weight) The sulfuric acid concentration and leaching

Note that for the purposes of these calculations all of the Co Cu and Ni in the feed slag was assumed to be in the oxidized form i e present as CoO (1 272% or 0 254%) Cu 2 O (0 563%) and NiO (2 546%) When carbon is added to the slag the various metallic elements reduce to different extents at a given level of carbon addition

Leaching of ferromanganese slag Various authors have undertaken prior investigations into the leaching of ferromanganese slag The leaching processes discussed include ferric chloride in the presence of sucrose carbamate leaching and the quick leach (also known as the water starved digestion method) with concentrated sulphuric acid (98–99%)

2 7 Comparing the Effectiveness of Acetic Acid and EDTA on Leaching and Electrodeposition EDTA (Skylabs) was used to compare its extraction efficiencies with those of acetic acid Leaching was done at pH 4 on 5 5 g samples using 100ml of 0 1 M solution portions on each extraction 0 1 M HCl was used to ad-just the pH of the solution [11]

Currently IOM develops the optimization of three technologies for the metallurgical processing of polymetallic nodules : – Hydrometallurgical Process of Acid Leaching using sulfur dioxide as a reducer – Pyro - hydrometallurgical processing obtaining Mn-rich slag and subsequent hydrometallurgical treatment of Ni Co u and Cu alloys –

A Abazarpoor M Halali M Maarefvand H Khatibnezhad " Application of response surface methodology and central composite rotatable design for modeling and optimization of sulfuric leaching of rutile containing slag and ilmenite" Russian Journal of Non-Ferrous Metals Volume 54 Issue 5 September 2013 pp 388-39

US3300297A

US3300297A US37035764A US3300297A US 3300297 A US3300297 A US 3300297A US 37035764 A US37035764 A US 37035764A US 3300297 A US3300297 A US 3300297A Authority US United States Prior art keywords tantalum columbium slag sulfuric acid tin Prior art date 1964-05-26 Legal status (The legal status is an assumption and is not a legal conclusion

H2SO4 by wet and dry slag wool filters Results were sufficiently en-couraging to indicate that the method had promise for the simultaneous re-moval of many types of solid and liquid aerosols and acid gases in a single simple inexpensive device Many commercially available slag fibers contain in excess of 25% CaO from the limestone used as a flux

Apr 12 2019Through optimization and desirability studies the optimum AAS mix contained 60% GGBS + 20% fly ash + 20% silica fume in terms of high compressive strength and drying shrinkage combinations Blek et al [ 55 ] demonstrated that a dosage of 1% shrinkage reducing admixture (SRA) was effective in decreasing drying shrinkage of AAS mortars by

Leaching of the studied material under cyclic wetting and drying led to less alkaline and more oxidised eluates than leaching under continuously wetted conditions The eluates are expected to maintain a mildly alkaline pH for long time periods during wetting drying and oxidation of the material because the material has considerable acid

The structure of the steelmaking slag is analyzed by XRD using a Philips X'Pert MPD and the elemental composition of the steelmaking slag is analyzed by XRF using a Philips PW2400 The concentration of Ca2+in the leaching solution is measured by AAS (Aanalyst 100 spectrometry manufactured by Perkin-Elmer USA) 3 4 Experimental design