Large diameter cylinder type graphite electrode giant electric furnace

Abstract

The invention relates to a giant electric furnace for zinc pyrometallurgy, in particular to an electric furnace using columned straight graphite electrodes with diameter range 200mm to 800mm, belonging to the electric furnace equipment field. The giant electric furnace for zinc pyrometallurgy is characterized in that: the hearth of the furnace body of the electric furnace is a quadrate sealed chamber, the upper side of which is side by side provided with at least two graphite electrode access sockets, each graphite electrode access socket is provided with a graphite electrode, and a feeding tube is connected with the upper side of the hearth of the furnace body of the electric furnace. The graphite electrodes are clipped by two arc connecting clamps connected with a connecting lead, and each graphite electrode can move from top to bottom along with the arc connecting clamps. The periphery of each arc connecting clamp is provided with a cooling jacket. The graphite electrodes have straight columned shapes, the diameters of which are 200mm to 800mm. The giant electric furnace for zinc pyrometallurgy using columned graphite electrodes with large diameters has the advantages of simple structure, safe and convenient use, operation and maintenance. The giant electric furnace for zinc pyrometallurgy effectively improves the output of the zinc pyrometallurgy for a single electric furnace, allowing the annual production capacity of the single electric furnace above ten thousand tons, thus the giant electric furnace for zinc pyrometallurgy establishes the foundation for the development of the large scale electric furnace industrialization, and also has excellent socioeconomic performance and application prospects in the market.

Description

Technical field: [0001] The invention relates to a giant electric furnace for pyrometallurgy, in particular to a cylindrical inline graphite electrode electric furnace with a diameter in the range of 200-800 mm. It belongs to the field of electric furnace equipment. Background technique: [0002] Zinc smelting methods can generally be divided into two categories: one is pyrometallurgy and the other is hydrometallurgy. Pyrochemical zinc smelting: The first step in zinc smelting is to roast the zinc sulfide concentrate. The obtained sulfur-free roasted ore is mixed with a carbonaceous reducing agent. When heated to about 1100°C, the zinc is reduced. The boiling point of zinc is 907°C, so zinc is introduced into a gaseous state into a condenser to condense into liquid zinc, and then cast into an ingot to form a product. There are distillation method, blast furnace method and electrothermal method in fire zinc smelting. The characteristic of electrothermal zinc smelting is to...

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Problems solved by technology

[0003] The existing zinc smelting electric furnace is a circular electric furnace, the volume of the furnace body is small, and the output of a single electric furnace is low. If the output is to be increased, the only solution is to increase the number of electric furnaces in total, which consumes a lot of energy, requires a large investment and high production costs.

In addition, the electrodes used in this type of zinc smelting electric furnace are all triangular (viewed from the cross section), but the replacement of triangular graphite electrodes is difficult, and the actual production operation is not safe.

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