阅读说明：本技术 一种电石渣再生氧化钙球的制备方法 (Preparation method of calcium oxide balls regenerated from carbide slag ) 是由 宿新泰 张恒 刘峰 唐福文 于 2019-12-04 设计创作，主要内容包括：本发明属于工业废渣再生的环保技术领域,特别是涉及一种电石渣再生氧化钙球的制备方法,该制备方法步骤如下：(1)将电石渣用粉碎机粉碎后,用80-120目筛过筛,得到电石渣粉末,备用；(2)然后用酸液和水对电石渣粉末进行浸渍除杂,利用微波反应处理,过滤分离得到滤渣硅铁杂质A和混合溶液B；(3)将杂质A干燥后研磨得到硅铁初级产品；将混合溶液B通入二氧化碳气体至溶液pH合适,过滤后分别得到碳酸钙沉淀C和废酸液；(4)用酸液与焦炭和碳酸钙沉淀C混合搅拌制成碳酸钙球,将碳酸钙球在高温烧结炉中煅烧,即得到工业中使用的氧化钙球。本该方法工艺简单,把电石渣加以环保利用,制造为附加值产品,可以提高企业经济效益。(The invention belongs to the technical field of environmental protection of industrial waste residue regeneration, and particularly relates to a preparation method of calcium oxide balls regenerated from carbide slag, which comprises the following steps: (1) crushing the carbide slag by a crusher, and sieving by a sieve with 80-120 meshes to obtain carbide slag powder for later use; (2) then, carrying out dipping impurity removal on the carbide slag powder by using acid liquor and water, carrying out microwave reaction treatment, and filtering and separating to obtain filter residue ferrosilicon impurity A and mixed solution B; (3) drying the impurity A and grinding to obtain a ferrosilicon primary product; introducing carbon dioxide gas into the mixed solution B until the pH of the solution is proper, and filtering to obtain a calcium carbonate precipitate C and a waste acid solution respectively; (4) mixing and stirring acid liquor, coke and calcium carbonate precipitate C to prepare calcium carbonate balls, and calcining the calcium carbonate balls in a high-temperature sintering furnace to obtain the calcium oxide balls used in industry. The method has simple process, environment-friendly utilization of the carbide slag, and capability of improving the economic benefit of enterprises and manufacturing the carbide slag into a product with an additional value.)

1. A preparation method of calcium oxide balls regenerated from carbide slag is characterized by comprising the following steps:

(1) crushing the carbide slag by a crusher, and sieving by a sieve with 80-120 meshes to obtain carbide slag powder for later use;

(2) then, carrying out dipping impurity removal on the carbide slag powder by using acid liquor and water, carrying out microwave reaction treatment, and filtering and separating to obtain filter residue ferrosilicon impurity A and mixed solution B;

(3) drying the impurity A and grinding to obtain a ferrosilicon primary product; introducing carbon dioxide gas into the mixed solution B until the pH of the solution is proper, and filtering to obtain a calcium carbonate precipitate C and a waste acid solution respectively;

(4) mixing and stirring acid liquor, coke and calcium carbonate precipitate C to prepare calcium carbonate balls, and calcining the calcium carbonate balls in a high-temperature sintering furnace to obtain the calcium oxide balls used in industry.

2. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: the acid solution in the step (2) is citric acid and/or ascorbic acid and/or acetic acid solution.

3. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: the microwave reaction in the step (2) is carried out at the temperature of 10-50 ℃ for 5-50 minutes.

4. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: and (4) introducing carbon dioxide gas in the step (3) until the pH value of the solution is 10-12.

5. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: the acid liquor in the step (4) is waste acid liquor and/or other acid liquor generated in the step (3).

6. The method for preparing the calcium oxide balls regenerated from the carbide slag according to claim 1, which is characterized by comprising the following steps: the temperature in the high-temperature sintering furnace in the step (4) is 1000-1400 ℃, and the time is 0.5-4 hours.

Technical Field

The invention belongs to the technical field of environmental protection of industrial waste residue regeneration, and particularly relates to a preparation method of calcium oxide balls regenerated from carbide slag.

Background

The carbide slag is a solid product generated after acetylene is obtained by hydrolyzing carbide, is an industrial waste slag, and can be used for preparing epoxypropane, treating acid wastewater, serving as roadbed filling materials, slag brick materials and the like. At present, a small amount of carbide slag is reused as a raw material in China, and most of the carbide slag is industrial solid waste. A large amount of alkaline carbide slag can change the soil property and pollute the environment after being stacked for a long time. Transport and treatment of carbide slag in the carbide industry costs a lot of money and materials, indirectly increasing the production cost of enterprises. The production of calcium carbide raw material quicklime is along with the exploitation of a large amount of limestone mines, and the exploitation of limestone available for enterprises is gradually reduced. In view of this, it has become a major research direction to recycle the industrial waste carbide slag through a simple process to prepare calcium oxide balls as raw materials for calcium carbide.

Disclosure of Invention

The purpose of the invention is: the industrial application method for preparing the calcium oxide balls by the microwave regeneration of the carbide slag solid waste is designed, and the industrial method is simple in process, low in production cost and recyclable in resources.

The technical scheme of the invention is a preparation method of calcium oxide balls regenerated from carbide slag, which comprises the following steps:

(1) crushing the carbide slag by a crusher, and sieving by a sieve with 80-120 meshes to obtain carbide slag powder for later use;

(2) then, carrying out dipping impurity removal on the carbide slag powder by using acid liquor and water, carrying out microwave reaction treatment, and filtering and separating to obtain filter residue ferrosilicon impurity A and mixed solution B;

(3) drying the impurity A and grinding to obtain a ferrosilicon primary product; introducing carbon dioxide gas into the mixed solution B until the pH of the solution is proper, and filtering to obtain a calcium carbonate precipitate C and a waste acid solution respectively;

(4) mixing and stirring acid liquor, coke and calcium carbonate precipitate C to prepare calcium carbonate balls, and calcining the calcium carbonate balls in a high-temperature sintering furnace to obtain the calcium oxide balls used in industry.

Optimally designing, wherein the acid solution in the step (2) is citric acid and/or ascorbic acid and/or acetic acid solution.

The optimal design is carried out, the temperature of the microwave reaction in the step (2) is 10-50 ℃, and the reaction time is 5-50 minutes.

Optimizing the design, and introducing carbon dioxide gas in the step (3) until the pH value of the solution is 10-12.

And (4) optimizing design, wherein the acid liquor in the step (4) is waste acid liquor and/or other acid liquor generated in the step (3).

The optimization design is carried out, the temperature in the high-temperature sintering furnace in the step (4) is 1000-.

Has the advantages that: the invention provides a preparation method of calcium oxide balls regenerated by carbide slag microwaves, which is simple in process, can reduce the purchase and transportation cost of raw materials, can reduce the consumption of calcium oxide products, and protects limestone mineral products which are in short supply of calcium oxide raw materials. The pollution of the carbide slag to the environment is reduced while the calcium oxide balls are prepared. The carbide slag is utilized to be manufactured into a product with additional value, and the economic benefit of an enterprise can be improved.

Drawings

FIG. 1 is a process flow chart of the calcium oxide ball regenerated by carbide slag microwave.

Detailed Description