MMK reaches new record resilience for steelmaking unit lining
The previous highest indicator (1,265 melts) was set just three months ago. An increase in the numbers of melts per lining supports higher output, reduces operational costs and increases production efficiency by saving refractories and reducing the costs of repair work.
The record became possible as a result of hard work by MMK’s steelmakers to improve steel smelting technology and provide necessary maintenance to the refractory lining. To increase the resilience of refractories, steelmakers must ensure that liquid metal remains within the units for an optimal period of time and carry out necessary preventive measures. The quality of the refractories is of great importance and is requested from suppliers. Additional factors that affect resilience include the quality of the lining implementation, which is carried out by specialists in repairing metallurgical furnaces from the OSK company; and the gunning of the main roof – the application of a special shotcrete made from refractory powder to working refractory lining increases its strength and improves resilience.
A system of motivation and material incentives engages technological personnel in increasing lining resilience: for each additional melting that exceeds the number prescribed by guidelines, funds are allocated to be distributed among the site workers.
The two-hearth furnace is capable of producing up to eight melts per shift. The annual capacity of THF No. 32 is about 1 million tonnes of steel.
MMK is one of the world's largest steel producers and a leading Russian metals company. The company's operations in Russia include a large steel-producing complex encompassing the entire production chain, from the preparation of iron ore to downstream processing of rolled steel. MMK turns out a broad range of steel products with a predominant share of high-value-added products. In 2017, the company produced 12.9 million tonnes of crude steel and 11.6 million tonnes of commercial steel products. MMK Group had sales in 2017 of USD 7,546 million and EBITDA of USD 2,032 million.
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