Manufacturing method of magnesium chloride discharge pipe of reactor for producing sponge titanium

Abstract

The invention introduces a manufacturing method of a magnesium chloride discharge pipe for producing sponge titanium, the magnesium chloride discharge pipe consists of a blocking plate (1), a horizontal pipe flange (4), a horizontal pipe (5), a vertical pipe (8) and a sleeve (10) in the horizontal pipe, wherein a rib plate (9) is used for connecting the vertical pipe (8) with a cylinder body (7) of a reactor together; the horizontal pipe (5) is continuously welded with the cylinder body (7) of the reactor, the vertical pipe (8) and upper and lower flange short cylinder bodies (3); the blocking plate (1) is welded with the vertical pipe (8); the horizontal pipe (5), the sleeve (10) in the horizontal pipe and the horizontal pipe flange (4) constitute a magnesium chloride discharge output pipe; and a certain gap is retained between the horizontal pipe (5) and the sleeve (10) in the horizontal pipe. The manufacturing method can avoid weld cracking of the horizontal pipe of the magnesium chloride discharge pipe, lead the sleeve at the inner layer to expand and contract freely and prolong the service life; when the horizontal pipe of the magnesium chloride discharge pipe is blocked, the horizontal pipe can be cut open for taking out the inner sleeve; and the manufacturing method can reduce the blocking probability of the magnesium chloride discharge pipe.

Description

technical field [0001] The invention relates to a technology in the field of non-ferrous metal smelting equipment, in particular to a method for manufacturing a reactor row magnesium chloride tube for preparing sponge titanium. Background technique [0002] Sponge titanium is the primary raw material in titanium alloy smelting. At present, the main method for industrial production of sponge titanium is the Kroll method. This method is to first use Mg and TiCl 4 The reduction reaction of Ti produces Ti, and then the excess Mg and the reaction product MgCl are removed by vacuum distillation 2 And a small amount of titanium chloride, and finally get a spongy titanium lump. The reduction distillation vessel is the key equipment in the whole production process. The magnesium chloride discharge tube is an accessory part of the reduction distillation vessel, which undertakes the important task of magnesium chloride discharge during the reduction period. During the process of magne...

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Problems solved by technology

[0003] CN1831163A "Reactor for Producing Sponge Titanium" discloses a manufacturing method of a magnesium chloride-discharging tube. Its shortcoming is that the horizontal tube of the magnesium chloride-discharging tube is made of single-layer ordinary carbon steel, and the temperature of the magnesium chloride-discharging horizontal tube can reach Above 700°C, it is easy to oxidize and thin. In addition, the welding constraints between the short cylinder body of the upper and lower flanges and the cylinder body of the reactor, the horizontal tube of the row of magnesium chloride tube is subjected to large thermal stress in the transverse direction, which is not only easy to deform, but also closely related to the upper and lower flanges. The connection between the short cylinder and the reactor cylinder is prone to cracks under the condition of thermal expansion and contraction, causing air to enter the reactor and pollute the titanium sponge, resulting in defective or even waste products

[0004] In addition, since the magnesium chloride horizontal tube is exposed to the normal temperature environment, the heat dissipation is fast. Once the discharge is not smooth, the magnesium chloride horizontal tube is easily blocked by magnesium chloride and magnesium. Once the blockage occurs, the furnace has to be shut down to cool down. Tube, to dredge, sometimes have to cut off the entire magnesium chloride horizontal tube and replace it with a new tube, which not only takes a lot of time, but also increases unnecessary power consumption, and more importantly, the product quality is degraded

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