阅读说明：本技术 一种矿热炉上升烟道清理积灰的方法 (Method for cleaning deposited ash in ascending flue of submerged arc furnace ) 是由 杨贵明 毕红兴 卢国洪 徐福昌 王国卫 徐加雄 毕学坚 洪济余 杨超 梁晓林 张 于 2019-11-19 设计创作，主要内容包括：本发明涉及冶金技术领域,尤其为一种矿热炉上升烟道清理积灰的方法,包括以下步骤：步骤一：选料：根据冶金原料的种类选择抑制剂的品种,并将选择的抑制剂放置到对应的物料仓内；步骤二：上料：通过自动给料机从物料仓向烟道内输送步骤一中选择的种类抑制剂；步骤三：积灰脱离：通过步骤二中的处理,抑制剂的设置可以有效的对结渣和沉灰进行催化氧化处理,提高了烟道上积灰结渣的熔点、加快了晶核的形成,从而有效的减弱了结渣分子间的相互作用力,减弱其对微硅粉的粘结性,使渣块疏松,从而脱落掉块或被烟气吹走,本发明中,既可以减少大气中灰尘和氮气化合物及二氧化硫的排放量,又可以对烟道内的结垢等进行清除,保证矿热炉的使用效果。(The invention relates to the technical field of metallurgy, in particular to a method for cleaning deposited ash in an ascending flue of a submerged arc furnace, which comprises the following steps: the method comprises the following steps: selecting materials: selecting the variety of the inhibitor according to the variety of the metallurgical raw materials, and placing the selected inhibitor into a corresponding material bin; step two: feeding: conveying the type inhibitor selected in the step one from the material bin into the flue through an automatic feeder; step three: separating accumulated ash: through the treatment in the second step, the setting of the inhibitor can effectively carry out catalytic oxidation treatment on the slagging and the settled ash, improve the melting point of the ash deposited and slagging on the flue and accelerate the formation of crystal nucleus, thereby effectively weakening the interaction force among slagging molecules, weakening the caking property of the inhibitor on the micro silicon powder, loosening the slag blocks, and leading the slag blocks to fall off or be blown away by smoke.)

1. A method for cleaning deposited ash in an ascending flue of a submerged arc furnace is characterized by comprising the following steps: the method comprises the following steps:

the method comprises the following steps: selecting materials: selecting the variety of the inhibitor according to the variety of the metallurgical raw materials, and placing the selected inhibitor into a corresponding material bin;

step two: feeding: conveying the type inhibitor selected in the step one from the material bin into the flue through an automatic feeder;

step three: separating accumulated ash: through the treatment in the step two, the setting of the inhibitor can effectively carry out catalytic oxidation treatment on the slagging and the settled ash, the melting point of the ash deposited and slagging on the flue is improved, and the formation of crystal nucleus is accelerated, so that the interaction force among slagging molecules is effectively weakened, the cohesiveness of the slagging molecules to the micro silicon powder is weakened, the slag blocks are loosened, and the slag blocks fall off or are blown away by smoke.

2. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: when the inhibitor is conveyed, compressed air with the pressure of more than 0.4kpa is adopted to assist in conveying the inhibitor to the inside of the flue.

3. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: before the inhibitor is added, the submerged arc furnace is ensured to be in a thermal state after being used for a period of time.

4. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: after the inhibitor is added, the use power of the submerged arc furnace is increased, so that the chemical gas is fully contacted with the heating surface adhered with the soot under the condition of violent combustion, and a better use effect is ensured.

5. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: the inhibitor comprises lime, cyanide, FD8954 coking inhibitor and the like.

6. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: the material bin is far away from a fire source, so that moisture and organic matters are avoided.

7. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: the usage amount of the inhibitor is one thousandth to three thousandth of the raw materials.

Technical Field

The invention relates to the technical field of metallurgy, in particular to a method for cleaning deposited ash in an ascending flue of a submerged arc furnace.

Background

In the industrial silicon smelting production, a flue is an important channel for exhausting gas in a furnace and is one of main devices for ensuring normal and stable operation of the furnace, but because industrial silicon smelting micro silicon powder has high viscosity, is easy to deposit and adhere in the flue to cause unsmooth flue gas flow, blocked system smoke exhaust and deteriorated furnace condition, the heated area of a boiler is one millimeter thick, the heat conductivity coefficient is reduced by about 50 times, the energy consumption is serious, the service life of the boiler and refractory materials can be influenced, and a large amount of S, N oxide and smoke dust can be discharged, so that the demand for a method for cleaning the accumulated dust in the ascending flue of an ore-smelting furnace is increased day by day.

Most of methods for cleaning accumulated dust in flues inside electric heating furnaces in the current market are manual cleaning, the furnaces need not be stopped for cleaning the flues once every 10-15 days, and 4-8 hours are needed each time, so that the method has the advantages of high operation intensity, large labor waste, greatly reduced productivity of enterprises and serious influence on production of the enterprises, and the method for cleaning the accumulated dust in the ascending flues of the submerged arc furnaces is provided for solving the problems.

Disclosure of Invention

The invention aims to provide a method for cleaning deposited ash in an ascending flue of a submerged arc furnace, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a method for cleaning deposited ash in an ascending flue of a submerged arc furnace comprises the following steps:

the method comprises the following steps: selecting materials: selecting the variety of the inhibitor according to the variety of the metallurgical raw materials, and placing the selected inhibitor into a corresponding material bin;

step two: feeding: conveying the type inhibitor selected in the step one from the material bin into the flue through an automatic feeder;

step three: separating accumulated ash: through the treatment in the step two, the setting of the inhibitor can effectively carry out catalytic oxidation treatment on the slagging and the settled ash, the melting point of the ash deposited and slagging on the flue is improved, and the formation of crystal nucleus is accelerated, so that the interaction force among slagging molecules is effectively weakened, the cohesiveness of the slagging molecules to the micro silicon powder is weakened, the slag blocks are loosened, and the slag blocks fall off or are blown away by smoke.

Preferably, when the inhibitor is conveyed, compressed air with the pressure of more than 0.4kpa is adopted to assist in conveying the inhibitor to the inside of the flue.

Preferably, the submerged arc furnace is kept in a hot state after being used for a period of time before the inhibitor is added.

Preferably, after the inhibitor is added, the use power of the submerged arc furnace is increased, and under the condition of violent combustion, the chemical gas is fully contacted with the heating surface adhered with the soot, so that a better use effect is ensured.

Preferably, the inhibitor comprises lime, cyanide, FD8954 coking inhibitor, and the like.

Preferably, the material bin is arranged far away from a fire source, so that moisture and organic matters are avoided.

Preferably, the inhibitor is used in an amount of one to three thousandths of the raw material.

Compared with the prior art, the invention has the beneficial effects that:

the invention can reduce the discharge amount of dust, nitrogen compounds and sulfur dioxide in the atmosphere, effectively protect the environment, clear away scales and the like in the flue and ensure the use effect of the submerged arc furnace.

Detailed Description