阅读说明：本技术 一种改性生石灰及其制备方法 (Modified quicklime and preparation method thereof ) 是由 顾拥明 于 2019-10-11 设计创作，主要内容包括：本发明公开了一种改性生石灰及其制备方法,包括如下重量份组分：石灰石80～100份、玻璃纤维5～10份、黏土3～5份、碳化木废料粉10～20份、微孔发泡剂5～8和水20～30份；所述制备方法包括如下步骤：(1)粉碎；(2)混料；(3)制备粘结剂；(4)制备成坯；(5)烧制成型。本发明一种改性生石灰的制备方法,在合理的配方设计的基础上,结合预热处理,尤其是预热发泡够工艺,有效降低了生石灰的成型时间,提高了成型效率；所制备的生石灰具有抗压强度高、比重轻,扬尘小等优异性能,市场前景广阔。(The invention discloses modified quicklime and a preparation method thereof, wherein the modified quicklime comprises the following components in parts by weight: 80-100 parts of limestone, 5-10 parts of glass fiber, 3-5 parts of clay, 10-20 parts of carbonized wood waste powder, 5-8 parts of microporous foaming agent and 20-30 parts of water; the preparation method comprises the following steps: (1) crushing; (2) mixing materials; (3) preparing a binder; (4) preparing a blank; (5) and (5) firing and forming. According to the preparation method of the modified quicklime, on the basis of reasonable formula design, preheating treatment, especially a preheating foaming enough process is combined, so that the forming time of the quicklime is effectively shortened, and the forming efficiency is improved; the prepared quicklime has the excellent performances of high compressive strength, light specific gravity, small dust emission and the like, and has wide market prospect.)

1. The modified quicklime is characterized by comprising the following components in parts by weight: 80-100 parts of limestone, 5-10 parts of glass fiber, 3-5 parts of clay, 10-20 parts of carbonized wood waste powder, 5-8 parts of microporous foaming agent and 20-30 parts of water.

2. The modified quicklime as claimed in claim 1, wherein the length of the glass fiber is 3-10 mm.

3. The preparation method of the modified quicklime is characterized by comprising the following steps:

(1) crushing: crushing limestone into limestone powder for later use;

(2) mixing materials: weighing limestone powder, glass fiber, carbonized wood waste powder and a microporous foaming agent prepared in the step (1) according to the formula ratio, and stirring and mixing the materials uniformly to obtain a mixed material;

(3) preparing a binder: weighing clay and water according to a formula ratio, mixing the clay and the water, and stirring the mixture into uniform mixed liquid for later use;

(4) preparing a blank: adding the mixed solution prepared in the step (3) into the mixed material obtained in the step (2), fully mixing, and pressing into a plurality of blanks with regular shapes;

(5) firing and forming: and (4) putting all the blanks prepared in the step (4) into a preheater, preheating, transferring into a rotary kiln, and calcining to obtain the modified quicklime.

4. The method for preparing modified quicklime according to claim 3, wherein the particle size of the crushed limestone powder is 0.5-1.5 mm.

5. The method for preparing modified quicklime as claimed in claim 3, wherein in the step (5), the preheating treatment comprises two stages of preheating foaming and preheating.

6. The method for preparing modified quicklime according to claim 5, wherein the preheating foaming process conditions are as follows: the temperature is 150-250 ℃, and the time is 10-30 min.

7. The method for preparing modified quicklime according to claim 5, wherein the preheating process conditions are as follows: the temperature is 450-600 ℃.

8. The method for preparing modified quicklime according to claim 3, wherein in the step (5), the calcination process conditions are as follows: the temperature is 950-1050 ℃ and the time is 1.5-1.8 h.

Technical Field

The invention relates to the technical field of lime product preparation, in particular to modified quicklime and a preparation method thereof.

Background

The main component of the limestone is calcium carbonate, and the limestone can be directly fired into lime. The main component of lime is calcium oxide, which has been widely used in the industries of plastics, coatings, paper making, steel making and the like, for example, when steel making, the addition of limestone can convert silicon dioxide in ore into slag at the same time, and lime has become one of the essential raw materials for steel making.

The quicklime prepared by the prior art has the following problems in the use process: the dust is serious, and the environmental pollution is great; low strength and high specific gravity.

Disclosure of Invention

The invention mainly solves the technical problem of providing modified quicklime and a preparation method thereof, and can solve the problems of the existing quicklime.

In order to solve the technical problems, the invention adopts a technical scheme that: providing modified quicklime, which comprises the following components in parts by weight: 80-100 parts of limestone, 5-10 parts of glass fiber, 3-5 parts of clay, 10-20 parts of carbonized wood waste powder, 5-8 parts of microporous foaming agent and 20-30 parts of water.

In a preferred embodiment of the present invention, the length of the glass fiber is 3 to 10 mm.

In order to solve the technical problem, the invention adopts another technical scheme that: the preparation method of the modified quicklime comprises the following steps:

(1) crushing: crushing limestone into limestone powder for later use;

(2) mixing materials: weighing limestone powder, glass fiber, carbonized wood waste powder and a microporous foaming agent prepared in the step (1) according to the formula ratio, and stirring and mixing the materials uniformly to obtain a mixed material;

(3) preparing a binder: weighing clay and water according to a formula ratio, mixing the clay and the water, and stirring the mixture into uniform mixed liquid for later use;

(4) preparing a blank: adding the mixed solution prepared in the step (3) into the mixed material obtained in the step (2), fully mixing, and pressing into a plurality of blanks with regular shapes;

(5) firing and forming: and (4) putting all the blanks prepared in the step (4) into a preheater, preheating, transferring into a rotary kiln, and calcining to obtain the modified quicklime.

In a preferred embodiment of the present invention, the particle size of the pulverized limestone powder is 0.5 to 1.5 mm.

In a preferred embodiment of the present invention, in the step (5), the preheating treatment includes two stages of preheating foaming and preheating.

In a preferred embodiment of the present invention, the process conditions of the preheating foaming are as follows: the temperature is 150-250 ℃, and the time is 10-30 min.

In a preferred embodiment of the present invention, the preheating process conditions are as follows: the temperature is 450-600 ℃, and the time is 20-30 min.

In a preferred embodiment of the present invention, in the step (5), the calcination process conditions are as follows: the temperature is 950-1050 ℃ and the time is 1.5-1.8 h.

The invention has the beneficial effects that: according to the preparation method of the modified quicklime, on the basis of reasonable formula design, preheating treatment, especially a preheating foaming enough process is combined, so that the forming time of the quicklime is effectively shortened, and the forming efficiency is improved; the prepared quicklime has the excellent performances of high compressive strength, light specific gravity, small dust emission and the like, and has wide market prospect.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.

The embodiment of the invention comprises the following steps: