Poster presentation
283
IRON PROCESSING SLAG FOR OBTAINING IRON OXIDE
RED PIGMENT
U.А. Khasanov
1
, Sh.E. Abdurakhmonov
1,2
, O.E. Abdurakhmonov
1
1)
Tashkent University of Chemical Technology, 100011, Uzbekistan,
Tashkent, Ave. Navoi, 32
2) Almalyk branch of the National Research Technological University "MISiS", 110105,
Uzbekistan, Tashkent region, Almalyk, st. Amir Temur, house 56.
The plants process raw materials containing secondary
lead from lead batteries
(about 70%), residual parts of units and devices of the electrical, metallurgical and
chemical industries (about 15%) and other waste (about 15%).
This secondary raw
material is processed using the calcination method with soda in electric furnaces. The
average composition of the charge, %: lead-containing raw materials (battery scrap and
waste) - 77, recycled dust - 10, soda - 7.5 and coke - 5.5. As a result, antimony lead is
obtained (3-3.5% Sb, 0.5-0.8% Cu, 0.05-0.8% Sn), sprudin (80% Pb, 10% S), dust (54%
Pb, 3% Cl) and soda slag.
At the Jizzakh battery plant, waste is generated during
the processing of secondary
lead containing scrap; soda slag (Figure 2a). According to X-ray fluorescence analysis
(XRF), soda slag contains the main macrocomponents in terms of elemental
composition in wt. %: 21.3 Na, 0.52 Al, 3.61 Si, 17.5 S, 0.64 Ca, 34.3 Fe, 1.12 Sn, 1.74
Pb. The XRF spectrum of slags is shown in Figure 1.
Figure 1. XRF spectrum of soda slag.
In this work, two types of iron oxide red pigment were obtained from
soda slag by
leaching, which are shown in Figure 2 (b, c).
Figure 2. Initial soda slag (a), obtained iron oxide pigments.
