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Ladle baking method in silicon smelting process

A technology of smelting process and baking method, which is applied in the direction of chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of harsh working environment, long baking time, and high labor intensity, and achieve good working environment and baking The effect of short time and standardized operation site

Active Publication Date: 2014-01-22
云南永昌硅业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can solve the problems of long baking time, high labor intensity, harsh working environment, high cost, and environmental pollution in traditional fuel baking bags, and can also effectively recycle and utilize the waste heat resources of silicon ingots

Method used

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  • Ladle baking method in silicon smelting process

Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Build a 6500mm long, 2900mm wide, and 2800mm high special well that can simultaneously bake two ladles at the silicon smelting and casting site, and make a heat accumulating plate with a length of 3000mm, a width of 3000mm, and a thickness of 100 mm 2 pieces, the diameter of the center hole is 1700mm, the surface of the heat accumulating plate has the function of heat accumulation, and the center hole has the function of heat transfer; when operating, first place the ladle to be baked in a special well, and then put the heat accumulating The plate is placed above the ladle, and the ladle opening must be coaxial with the center hole of the heat accumulating plate when placed. When baking, the ladle is preheated with silicon ingots condensed to black at a temperature of 400°C-600°C3 Once, for 2 hours each time, place a traditionally used cooling silicon rack on the heat accumulating plate, and then place the silicon ingot with a temperature of 800°C-1050°C just ...

Embodiment 2

[0020] Embodiment 2: For the baking method of the newly built ladle to be baked, the other conditions are the same as in Example 1, and the baking time and frequency are for each silicon ingot when the ladle is preheated using the waste heat on the silicon ingot. After baking for 2 hours, replace it, and replace it 6 times; after preheating, bake it. First, place a traditionally used cooling silicon rack on the heat accumulation plate, and place the silicon ingot with a temperature of 800°C-1050°C that has just been demoulded. Baking at a high temperature on a cooling silicon rack, and replacing each silicon ingot 12 times after baking for 2 hours.

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Abstract

The invention relates to a ladle baking method in a silicon smelting process, is a ladle baking method using silicon ingot waste heat. First a special well for ladle baking is built, a heat collection plate is made, a center hole with a diameter less than that of a ladle is arranged on the heat collection plate, the heat collection plate is put above the ladle to enable a ladle opening and the ladle center hole on the heat collection to be concentric, during baking, a silicon ingot cooled to black is put on the heat collection plate, the silicon ingot covers right above the ladle to preheat the ladle, and then the demoulded high-temperature silicon ingot is used for baking the ladle. The method can solve the problems of long baking time, high labor intensity, poor working environment, high cost, environmental pollution and the like of traditional fuel ladle baking, and can effectively recycle silicon ingot waste heat resources.

Description

technical field [0001] The invention relates to a ladle-carrying baking method in the silicon smelting process, and belongs to the technical field of silicon smelting equipment design. Background technique [0002] In the production of silicon smelting, the ladle is one of the most important equipment in front of the furnace. The ladle is generally conical, with a height of 2400mm, a diameter of the bottom circle of 1800mm, and a diameter of the upper circle of 2100mm. It is mainly used to hold the 1470℃~ The high temperature silicon melt at 1600°C, during the use of the ladle, the bottom and wall of the ladle are eroded by slag and adhered by the condensed silicon melt on the one hand, and on the other hand, the ladle is oxidized to varying degrees due to the introduction of oxygen during the refining process , the ladle needs to be cleaned and repaired after using 9 heats for about 1 day. When repairing, it is necessary to replace the distributor poured on the bottom of th...

Claims

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Application Information

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IPC IPC(8): C01B33/021
CPCY02P20/129
Inventor 王传昌李宗有苏杰王建波周志浩卢国洪张忠益周杰蔺以成蒋卫强董诗韩姬云宗
Owner 云南永昌硅业股份有限公司
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