Multipurpose furnace top drill rod inserting mechanism and method for ferronickel smelting submerged arc furnace

Abstract

The invention relates to the field of machinery, in particular to a multipurpose furnace top drill rod inserting mechanism and method for a ferronickel smelting submerged arc furnace. The drill rod inserting mechanism comprises a mechanism base (6), wherein a power cylinder (1) is fixed above the mechanism base (6), the lower portion of the mechanism base (6) is fixed on a furnace cover (9), a piston rod (2) extends out of the power cylinder (1), the lower portion of the piston rod (2) is connected with a drill rod inserting pipe (7) through a connecting flange or a screw (3), the drill rod inserting pipe (7) comprises a blowing opening (4), a hollow anti-blocking structure (5) and a hanging piece (8), the blowing opening (4) can add various raw materials into a furnace through the hollow drill rod inserting pipe (7), and the end of the drill rod inserting pipe (7) and the hanging piece (8) can move up and down to be inserted into a material layer. According to the invention, the multipurpose furnace top drill rod inserting mechanism is simple in structure, safe, reliable and high in automation degree, can be further adjust and control the smelting atmosphere in the furnace, increased the safety of ferronickel smelting of the submerged arc furnace, is beneficial, practical and feasible in the field of ferronickel smelting of the submerged arc furnace, and can be further popularized and implemented.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a multi-purpose top brazing mechanism and method for ferronickel smelting submerged arc furnaces. Background technique [0002] At present, the metallurgical furnaces used in the ferronickel pyrometallurgy industry are mainly submerged arc furnaces (electric arc furnaces). The smelting process is to dry the laterite nickel ore with a water content of 25-40% through a sintering machine or a rotary kiln for drying, dehydration and pre-reduction treatment, and then send it to an electric furnace for further reduction and melting, and then heat it to a high temperature of 1450°C to 1600°C in the electric furnace for reduction smelting Produces nickel pig iron. [0003] In the process of electric furnace smelting, there are often accidents such as material layer collapse and slag turning in the electric furnace. The reason is analyzed because the material layer in the furnace has poor air pe...

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Problems solved by technology

[0003] In the process of electric furnace smelting, there are often accidents such as material layer collapse and slag turning in the electric furnace. The reason is analyzed because the material layer in the furnace has poor air permeability, and the furnace charge is sintered into a large sticky charge, resulting in bridging, hollowing, and melting of the charge. To a certain extent, it will lead to the collapse of the material layer and slag turning, which will cause the top of the furnace to burst into flames, and even the furnace body to burst into flames, which is very dangerous.

In the industry, the measures to reduce such accidents are generally to control the thickness of the material layer, control the electrode power and electrode pressing speed, etc., but the effect is often not good

[0004] At the same time, in ferronickel smelting, according to the different process requirements, the pressure on the top of the furnace is different, and the gas content in the furnace is also different. It is not easy to achieve the purpose of controlling the atmosphere in the furnace only by ore blending and control operations.

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