Education of the republic of uzbekistan tashkent state technical university named after islam karimov

Geological Engineering
139 
- division of metal and slag in the liquid state. 
Questions of melting of magnetic (metal) fraction and slag the rest aren't considered here. 
To specification the obtained data, the melting products are exposed to microscopic 
analysis to determine structure and material structure. 
At the first stage, laboratory trials on establishing optimum parameters of the restoration 
process of slags were made. As reducer, the crushed coke and Angren coal were used. The varied 
parameters and their sizes when conducting laboratory trials are specified in Tab. 1. 
On the laboratory furnace at restoration in crucibles, only check experiments showing a 
bare possibility of a low-temperature reduction of iron from slags coke or Angren were made by 
coal [8]. 
The maximum slag reduction was achieved at a temperature of 1000 
0
C, a reducing agent 
flow rate of 30%, andan isothermal holding time of 240 minutes for slags of RF lime 
granulation. The minimum value of the degree of reduction was obtained for quickly cooled FSF 
slags, with a reducing agent flow rate of 15%, the temperature of 800 
0
C, and an isothermal 
holding time of 90 minutes [9-14]. 
Table 1.
Variable parameters and their values during execution the first stage of laboratory 
experiments. 
Parameter name 
Unit of 
measure 
Value parameter during experiments 
 
Temperature 
0
C 
800 
900 
1000 
The ratio of reducing agent to 
slag 
% 
15 
22,5 
30 
Isotherm exposure time 
Time, min 
90 
150 
240 
Six reconstituted material samples with minimal, intermediate, and maximum reduction 
were selected for further investigation. 
These samples underwent additional grinding in a laboratory mill and three-fold magnetic 
separation with intermediate grinding. 
For the most easily reducing slag granulated in lime milk, experiments were carried out to 
determine the optimal consumption of the reducing agent. 
Experiments were carried out at the consumption of reducing agent 20. 25. 27% from the 
mass of slag at an isothermal holding time of 240 minutes and a temperature of 1000 
0
C. 
The laboratory experiments show that an increase in the amount of reducing agent to slag 
over 25% does not lead to an increase in the degree of reduction. 
Therefore, the influence of the isothermal holding time on the degrees was restored for 
slags of OP, and CFP of lime granulation was specified in laboratory experiments at the 
following parameters: temperature 1000 
0
C, reducing agent consumption 25% of slag mass, 
isothermal holding time 120. 150. 180. 240 minutes. As can be seen from the data in this table, 
an increase in the isothermal holding time over 180 minutes does not increase the degree of 
reduction [15-17]. 
At the obtained optimal mode, temperature 1000 
0
C, reducing agent flow rate 25%, 
isothermal holding time 180 minutes, laboratory experiments were carried out to study the effect 

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