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

Geological Engineering
142 
Fig. 4. Dependence of change of iron reduction degree in slag (a, %) on the 
consumption of reducing agent (coke) (% of slag weight) at T = 1000 
0
C. 
Fig. 5. Dependence of iron reduction degree from slag (a, %) on reducing agent 
consumption (% of slag weight). 
The dependence of extent of restoration of iron in slag from consumption of reducer 
(coke) (% of the mass of slag) at T=1000 
0
C is given in schedule (fig. 6). The graph shows the 
dependence of iron reduction degree (% of initial slag on reducing agent consumption (Fig. 6). 

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Geological Engineering
143 
Fig. 6. The degree of reduction of iron oxide in metal slag depends on the duration 
of isothermal holding and temperature. 
As a result of the assessment of the obtained patterns, the following conclusions can be drawn: 
- optimum temperature of the process 900-1000 
0
C; 
- optimum consumption of reducing agent 25-35%; 
- optimum holding time of 180-240 minutes. 
In principle, the results obtained are consistent with data on the reduction of iron and iron 
silicate materials in ferronickel production. 
To ensure thermal balance, increasing the consumption of reducing agents by 10-15% for 
industrial furnaces. 
 
RESULTS. 
The resulting iron-containing fraction may be remelted after briquetting to 
form an iron alloy or cast iron. 
The silicate residue can be used to produce slag products and to recover copper by known 
methods. 
Unique specifics distinguish work on the Angren coal. Typically, the low-temperature 
reduction is carried out using coke fines, anthracite, or coal. 
Replacing coke with Angrensky coal in an industrial furnace will require several 
additional measures to eliminate the inevitable violation of the temperature profile in this case. 
This issue is addressed through the following activities: 
- natural gas flooding; 
- separation of carbon from the obtained material and its return to the head of the process; 
- selection of fractional raw material of reducing agent. 
In general, the questions of the suitable replacement (full or partial) of coke with Angren 
coal go beyond the scope of this work. 
Dependence and yield of the metal fraction on reducing the agent flow rate. 

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