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Blow-in method for long-term shutdown maintenance of metallic silicon ore heating furnace

A submerged arc furnace, metal silicon technology, applied in non-metallic elements, chemical instruments and methods, silicon compounds, etc., can solve problems such as large consumption of human and financial resources, reduce labor intensity, high utilization rate, and reduce product quality. the effect of fluctuations

Inactive Publication Date: 2012-12-19
云南永昌硅业股份有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention provides an operation method of directly starting the furnace without clearing the furnace every time the furnace is stopped, which solves the problem of large consumption of manpower, material resources and financial resources for each time the furnace is stopped for maintenance, cleaning and starting the furnace, and reduces the time for adjusting the furnace condition , reducing the fluctuation of product quality when restarting furnace production, so as to achieve the purpose of low-cost furnace start-up and smooth transition to high and stable production

Method used

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Examples

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Embodiment Construction

[0016] Example: The present invention is implemented on the 25500KVA industrial silicon submerged arc furnace independently developed by the company. The production technical indicators include smelting electricity consumption of 11680Kwh, carbon consumption of 1.58t, silica consumption of 2.60, and an average daily output of 46 tons.

[0017] Shut down the furnace before maintenance , Use the PLC hydraulic control system to move the electrode every 15 minutes after each shutdown to avoid the electrode being stuck by the charge. When the temperature of the charge drops to 600°C, stop moving the electrode when there is no adhesion to the electrode;

[0018] After the overhaul, the furnace needs to be turned on, and the furnace should be turned on according to the following steps:

[0019] 1) For the preparation work before power transmission of industrial silicon submerged arc furnace, first clean (partial) dead material around the electrode, add 200kg, 3-50mm crushed electrod...

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Abstract

The invention relates to a blow-in method for long-term shutdown maintenance of a metallic silicon ore heating furnace. In a production process of metallic silicon, before an ore heating smelting electric furnace is maintained, the ore heating smelting electric furnace is required to be shut down firstly, and the ore heating smelting electric furnace is required to be blown in after being maintained. The operation method which can directly blow in without prepurging in each shutdown solves the problem that consumption of manpower, material and financial resource during prepurging and blow-in of every shutdown maintenance process is high; and furnace condition adjusting time is reduced, and fluctuation of product quality when blow-in is carried out again for production, thus the aims of low-cost blow-in, smooth transition and high and stable yield are realized.

Description

technical field [0001] The patent of the invention relates to a method for starting a metal silicon submerged arc furnace for long-term shutdown for maintenance, and belongs to the technical field of metal silicon smelting technology. Background technique [0002] Shutdown, maintenance and start-up of the electric furnace for metal silicon submerged thermal smelting is an important process link in the production of metal silicon. In the production process of metal silicon, due to the limited power supply and the particularity of production, submerged arc furnaces need large-scale equipment overhaul every year. Every overhaul and equipment replacement needs to remove all the charge in the furnace, and the dead part in the furnace needs to be blasted before it can be removed. During the blasting, the charcoal bricks and refractory bricks in the furnace are partially damaged. After cleaning the furnace, it needs to be rebuilt. Furnace building treatment, every time the furnace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/021
Inventor 李宗有周开亮卢国洪王正勇周杰张忠益赵兴凡
Owner 云南永昌硅业股份有限公司
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