Elevated short process energy-saving rkef nickel-iron alloy production equipment and technology

Abstract

The invention discloses an elevated short-flow process energy-saving RKEF nickel-iron alloy production process, which includes the following steps: (1) drying; (2) batching; (3) roasting-pre-reduction; (4) electric furnace smelting; (5) casting and forming. The invention also discloses an elevated short-process energy-saving RKEF process nickel-iron alloy production equipment, which is mainly composed of a rotary kiln, a drying kiln, an electric furnace workshop, a transfer station, a batching station, and a raw material warehouse. One end of the rotary kiln is connected to the electric furnace workshop, and the other One end is connected to the transfer station, the drying kiln is located below the rotary kiln, one end of the drying kiln is connected to the electric furnace workshop, the transfer station is connected to the batching station at the end far away from the rotary kiln, and the raw material warehouse is close to the drying kiln through a belt conveyor One end of the electric furnace workshop is connected. The invention improves the temperature of entering the furnace by optimizing the design, reduces the power consumption of smelting, makes full use of energy, reduces energy consumption and reduces environmental pollution.

Description

technical field [0001] The invention relates to the field of metallurgy, and specifically refers to an elevated short-flow energy-saving RKEF nickel-iron alloy production equipment and process. Background technique [0002] As a noble metal, nickel has the characteristics of corrosion resistance, oxidation resistance, high mechanical strength, and good ductility. It is an important additive in stainless steel production, especially an indispensable and important raw material for 300 series stainless steel. In recent years, the rapid development of the field of stainless steel has driven the development of ferronickel production enterprises. RKEF process is a classic process for processing laterite nickel ore. In the process of treating laterite nickel ore in the traditional RKEF process, the laterite nickel ore with a water content of 30-40% is dried and pre-reduced, and then sent to an electric furnace for reduction and smelting at a high temperature of about 1550°C to 160...

AI Technical Summary

Problems solved by technology

In the traditional RKEF process, the drying kiln and rotary kiln are scattered, and the high-temperature calcination process is as follows: rotary kiln→insulation material tank→travel (up to the top of the electric furnace, precise positioning is required)→high-level silo→electric furnace, high-temperature calcination requires The special equipment will produce a large temperature drop and a large amount of dust after being transported twice. At the same time, the drying kiln is arranged far away, and the flue gas pipeline is too long. full recycling of

[0003] Through the research on the RKEF process, it is found that the configuration of the RKEF process varies greatly among manufacturers, and each has its own characteristics (such as electric furnace type, feeding method, flue gas heat energy utilization, etc.), and there are large project investment and imperfect heat energy utilization. , many calcined sand transfer equipment, complicated process, easy to block pipes for flue gas transmission, etc.

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