A method for baking ladles during silicon smelting

Abstract

The invention discloses a roasting method of ladle in silicon smelting process. The roasting method comprises the following steps: S1. constructing a special tower body for roasting the ladle in a silicon smelting and pouring place, wherein the height of the tower body is 9.6 meters, the largest width bottom is 8.4 meters, the narrowest width of the upper end is 6.3 meters, three sides of the tower body are constructed, another side is hinged with an encapsulation plate, the top of the tower body is closed, two partition plates and four baffles are arranged, each partition plate is provided with a plurality of first openings at equal intervals, the width of each first opening is 175mm-265mm, the baffle is 3.6 meters high, and a plurality of second openings are formed in each baffle. The roasting method facilitates the cyclic utilization of energy resources, the sustainable development and green production can be realized, and the generation of waste gas and dust in combustion can be prevented from polluting the environment, so that the environment protection is facilitated, the roasting time is greatly shortened, the roasting speed is quickened, the roasting efficiency is efficiently improved, and the labor intensity of working staffs can be effectively lowered.

Description

technical field [0001] The invention relates to the technical field of silicon smelting equipment, in particular to a method for baking ladles during the silicon smelting process. Background technique [0002] Vacuum ladle is a kind of turnover equipment commonly used in the metallurgical industry. It is a relatively large airtight container made of steel shell lined with refractory materials. A certain vacuum degree is generated in the ladle by the negative pressure generating device on it, so as to Extract the smelted liquid silicon, magnesium and other metals from the electrolytic tank and transfer them to other places. The vacuum bag has a cover to generate a vacuum, which is convenient for absorbing the liquid metal in the electrolytic tank. It has both suction and transfer functions. And the open bag only has the transfer function. Vacuum ladle only produces a small negative pressure when absorbing liquid metal, and it is in a state of normal pressure most of the time...

AI Technical Summary

Problems solved by technology

[0004] The ladle baking method is to dump the repaired ladle, put firewood, charcoal, coal and other fuels into the ladle and ignite it, and adjust the fire to three levels: low fire, medium fire, and high fire by controlling the amount of fuel added. In the second stage, the heat generated when the fuel is burned is used to slowly bake the ladle for 48 hours. This method has the following problems in the baking process: first, it occupies a large area of ​​the site; second, it produces a lot of smoke and the working environment is poor; It takes a long time to bake. It takes 48 hours to bake for new buildings, and 24 hours for repaired bags. People, the ashes in the bag need to be removed after baking, which will pollute the environment after stacking; fifth, the baking cost is high

It is not conducive to production, affects the benefits of enterprises, and is not conducive to sustainable development and green production

[0005] In the production of silicon smelting in submerged arc furnaces, the temperature of casting silicon ingots is high, and the silicon ingots need to be cooled before they can be crushed and finished. Because the cooling method adopted is spontaneous combustion cooling, the cooling time is more than 5 hours, and a large amount of loss is lost during the process. Thermal energy, silicon ingot waste heat is not effectively recycled in smelting production, resulting in a large amount of energy waste, which is not conducive to sustainable development

[0006] The existing ladle-carrying and baking method is time-consuming, labor-intensive, harsh production environment, high cost and pollutes the environment, which is not conducive to sustainable development, and the waste heat in the production process of submerged arc furnace silicon smelting cannot be effectively utilized, resulting in serious energy consumption. Waste is not conducive to energy saving, environmental protection and sustainable development. For this reason, we propose a baking method for lifting ladles in the process of silicon smelting to solve the above problems