阅读说明：本技术 一种循环利用电石渣生产电石的方法 (Method for producing calcium carbide by recycling calcium carbide slag ) 是由 王卫兵 刘岗辉 于 2021-11-03 设计创作，主要内容包括：本发明涉及一种循环利用电石渣生产电石的方法,属于电石渣的资源化利用领域,该方法主要包括以下步骤：(1)将干法乙炔产生的电石渣震动筛分,去除较大的颗粒及杂质；(2)对步骤(1)处理后得到的电石渣进一步烘干,防止在后续步骤中出现团聚现象；(3)对步骤(2)处理后得到的电石渣进行电磁除杂,获得硅铁；(4)对步骤(3)处理后得到的电石渣进行旋风分离；(5)利用布袋除尘器捕获步骤(4)中从排气管排出的粒径较小的电石渣；(6)对步骤(5)处理后得到的电石渣进行高温煅烧；(7)对步骤(6)处理后得到的电石渣挤压造粒成球；(8)将步骤(7)处理后的电石渣用于生产电石的原料制乙炔。本方法工艺简单,在循环利用电石渣的同时也可获得硅铁副产品,提高了经济效益,同时,循环利用电石渣可以减少乙炔生产对石灰石的依赖,减少电石渣对环境的危害。(The invention relates to a method for producing calcium carbide by recycling calcium carbide slag, which belongs to the field of resource utilization of the calcium carbide slag and mainly comprises the following steps: (1) vibrating and screening carbide slag generated by acetylene dry method to remove larger particles and impurities; (2) further drying the carbide slag obtained after the treatment in the step (1) to prevent agglomeration in the subsequent steps; (3) performing electromagnetic impurity removal on the carbide slag obtained after the treatment in the step (2) to obtain ferrosilicon; (4) performing cyclone separation on the carbide slag obtained after the treatment in the step (3); (5) capturing carbide slag with smaller particle size discharged from the exhaust pipe in the step (4) by using a bag-type dust collector; (6) calcining the carbide slag obtained after the treatment in the step (5) at a high temperature; (7) extruding and granulating the carbide slag obtained after the treatment in the step (6) into balls; (8) and (4) using the carbide slag treated in the step (7) as a raw material for producing carbide to prepare acetylene. The method has simple process, can obtain the ferrosilicon byproduct while recycling the carbide slag, improves the economic benefit, and simultaneously can reduce the dependence of acetylene production on limestone and reduce the harm of the carbide slag on the environment.)

1. A method for producing calcium carbide by recycling calcium carbide slag is characterized by comprising the following steps:

(1) vibrating and screening carbide slag generated by acetylene dry method to remove larger particles and impurities;

(2) further drying the carbide slag obtained after the treatment in the step (1) to prevent agglomeration in the subsequent steps;

(3) performing electromagnetic impurity removal on the carbide slag obtained after the treatment in the step (2) to obtain ferrosilicon;

(4) performing cyclone separation on the carbide slag obtained after the treatment in the step (3);

(5) capturing carbide slag with smaller particle size discharged from the exhaust pipe in the step (4) by using a bag-type dust collector;

(6) calcining the carbide slag obtained after the treatment in the step (5) at a high temperature;

(7) extruding and granulating the carbide slag obtained after the treatment in the step (6) into balls;

(8) and (4) using the carbide slag treated in the step (7) as a raw material for producing carbide to prepare acetylene.

2. The method for producing the calcium carbide by recycling the calcium carbide slag is characterized in that an electromagnetic impurity removal technology is added, and the obtained ferrosilicon can improve the economic benefit of recycling the calcium carbide slag.

3. The method for producing the calcium carbide by recycling the calcium carbide slag is characterized in that the calcium carbide slag is separated by skillfully combining a cyclone separation technology and a cloth bag dust removal technology.

Technical Field

The invention relates to a method for producing calcium carbide by recycling calcium carbide slag, and belongs to the field of resource utilization of the calcium carbide slag.

Background

The carbide slag is waste generated by acetylene preparation through a calcium carbide method, occupies valuable land resources when being stacked on site without being treated, and can be scattered into air to cause dust raising and influence the air quality. Because the carbide slag contains more calcium hydroxide, impurities contained in the carbide slag are removed, and then the carbide slag is calcined at high temperature and extruded to form a raw material for producing the carbide, which can be used for acetylene production again.

Disclosure of Invention

The method aims to recycle the carbide slag to reduce the pollution of the carbide slag to the environment and improve the economic benefit of enterprises, removes impurities in the carbide slag, and then uses the carbide slag as a raw material for producing the carbide through high-temperature calcination and extrusion molding for acetylene production again, and has simple process and high economic benefit.

A method for producing calcium carbide by recycling calcium carbide slag is characterized by comprising the following steps:

(1) vibrating and screening carbide slag generated by acetylene dry method to remove larger particles and impurities;

(2) further drying the carbide slag obtained after the treatment in the step (1) to prevent agglomeration in the subsequent steps;

(3) performing electromagnetic impurity removal on the carbide slag obtained after the treatment in the step (2) to obtain ferrosilicon;

(4) performing cyclone separation on the carbide slag obtained after the treatment in the step (3);

(5) capturing carbide slag with smaller particle size discharged from the exhaust pipe in the step (4) by using a bag-type dust collector;

(6) calcining the carbide slag obtained after the treatment in the step (5) at a high temperature;

(7) extruding and granulating the carbide slag obtained after the treatment in the step (6) into balls;

(8) and (4) using the carbide slag treated in the step (7) as a raw material for producing carbide to prepare acetylene.

The method for producing the calcium carbide by recycling the calcium carbide slag is characterized in that an electromagnetic impurity removal technology is added, and the obtained ferrosilicon can improve the economic benefit of recycling the calcium carbide slag.

The method for producing the calcium carbide by recycling the calcium carbide slag is characterized in that the calcium carbide slag is separated by combining a cyclone separation technology and a cloth bag dust removal technology.

The method has simple process, can obtain the ferrosilicon byproduct while recycling the carbide slag, improves the economic benefit, and can reduce the dependence of acetylene production on limestone and reduce the harm of the carbide slag on the environment.

Drawings

FIG. 1 is a schematic view of the process of the present invention

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, a method for producing calcium carbide by recycling calcium carbide slag is characterized by comprising the following steps:

(1) vibrating and screening carbide slag generated by acetylene dry method to remove larger particles and impurities;

(2) further drying the carbide slag obtained after the treatment in the step (1) to prevent agglomeration in the subsequent steps;

(3) performing electromagnetic impurity removal on the carbide slag obtained after the treatment in the step (2) to obtain ferrosilicon;

(4) performing cyclone separation on the carbide slag obtained after the treatment in the step (3);

(5) capturing carbide slag with smaller particle size discharged from the exhaust pipe in the step (4) by using a bag-type dust collector;

(6) calcining the carbide slag obtained after the treatment in the step (5) at a high temperature;

(7) extruding and granulating the carbide slag obtained after the treatment in the step (6) into balls;

(8) and (4) using the carbide slag treated in the step (7) as a raw material for producing carbide to prepare acetylene.

The method for producing the calcium carbide by recycling the calcium carbide slag is characterized in that an electromagnetic impurity removal technology is added, and the obtained ferrosilicon can improve the economic benefit of recycling the calcium carbide slag.

The method for producing the calcium carbide by recycling the calcium carbide slag is characterized in that the calcium carbide slag is separated by skillfully combining a cyclone separation technology and a cloth bag dust removal technology.

The method comprises the steps of firstly treating carbide slag through vibration screening and drying, obtaining ferrosilicon by utilizing electromagnetic impurity removal, separating the carbide slag with different thicknesses by utilizing a cyclone separator according to the characteristics of different calcium hydroxide contents in the carbide slag with different particle sizes, capturing the part with the smaller particle size and the higher calcium hydroxide content by a bag-type dust remover, and finally calcining at high temperature and carrying out extrusion forming to obtain the raw material for producing the carbide for preparing acetylene.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.