Combustion agent for ceramic proppant rotary kiln, preparation method and application thereof

Abstract

The present application belongs to the technical field of ceramic proppant production, and discloses a kind of combustion agent for ceramic proppant rotary kiln and its preparation method and application. With total mass percentage content 100%, its composition is: sawdust 15%±3%, the balance is coal. Preparation method: take sawdust and coal according to proportion, mix and grind together to 150 mesh±20 mesh, more than 80% passing rate. A kind of combustion agent for rotary kiln is applied in the preparation of ceramic proppant. The present application adds a certain proportion of sawdust in coal, and then uses the rotary kiln in the production of ceramic proppant. It is found that the smoothness of ceramic proppant product is greatly improved, and the quality of the product is also significantly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of the production of ceramic proppants, and particularly relates to a combustion agent for a rotary kiln for ceramic proppants, a preparation method and application thereof. BACKGROUND

[0002] The preparation process of ceramic proppants is roughly as follows: raw material crushing, granulation, screening, calcination, drying, and packaging into finished products. The calcination is usually carried out in a rotary kiln. The energy sources for the rotary kiln are generally natural gas and coal mine. However, natural gas is expensive, and enterprises have turned to coal mine as the combustion agent for the rotary kiln in order to reduce costs. However, because of the structure and composition of coal mine, ash is easily produced during combustion, and the ash is brought into the rotary kiln by hot air, resulting in that the surface of the produced ceramic proppant product is attached with many small particles, which causes poor surface finish of the product and seriously affects the appearance of the product. SUMMARY

[0003] In order to overcome the deficiencies in the prior art, the purpose of the present application is to provide a combustion agent for a rotary kiln for ceramic proppants, a preparation method and application thereof.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] A combustion agent for a rotary kiln for ceramic proppants, with a total mass percentage of 100%, consists of: sawdust 15% ± 3%, and the balance is coal.

[0006] Preparation method: take sawdust and coal in proportion, mix and grind to 150 mesh ± 20 mesh, with a passing rate of more than 80%.

[0007] Application of a combustion agent for a rotary kiln in the preparation of ceramic proppants.

[0008] Beneficial effects: by adding a certain proportion of sawdust to coal and then using it in the rotary kiln for ceramic proppant production, it is unexpectedly found that the finish of the ceramic proppant product is greatly improved, and the quality of the product is also significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 : Microscope photograph of the ceramic proppant product obtained in Application Example 1.

[0010] Figure 2 : Microscope photograph of the ceramic proppant product obtained in Application Example 2. DETAILED DESCRIPTION

[0011] In order to make the present application more clear and explicit, the present application is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0012] Example 1

[0013] A kind of ceramsite proppant rotary kiln burning agent, its composition is as follows: sawdust 15% and coal 85% by total mass percentage.

[0014] Preparation method: take sawdust and coal by proportion, mix and grind to 80% pass rate of 150 mesh.

[0015] Comparative Example 1

[0016] The difference from Example 1 is that the amount of sawdust added is 0, that is, the burning agent is all coal.

[0017] Preparation method: take coal, grind to 80% pass rate of 150 mesh.

[0018] Application Example 1

[0019] A kind of ceramsite proppant preparation method, the steps are as follows:

[0020] (1), take raw materials by mass percentage: manganese ore 4%, potassium feldspar 3%, bauxite 93%;

[0021] (2), all raw materials of step (1) are ground together in a ball mill, sieved to a particle size of 400 mesh with a pass rate of 98%, sent to spray granulation, sieved to a particle size of 30-50 mesh, then sent to a rotary kiln for calcination, the burning agent used in the rotary kiln is the product of Example 1, the calcination temperature is 1300℃, the calcination time is 40min, after calcination, natural cooling to room temperature, sieving again to 30-50 mesh, ceramsite proppant product is obtained.

[0022] Application Example 2

[0023] The difference from Application Example 1 is that the burning agent used in the rotary kiln is the product of Comparative Example 1; the others are the same as Application Example 1.

[0024] Figure 1 is the microscope photo of the ceramsite proppant product obtained in Application Example 1; Figure 2 is the microscope photo of the ceramsite proppant product obtained in Application Example 2. Figure 1 and Figure 2 It can be seen that compared with using pure coal as a burning agent, the smoothness of the ceramsite proppant product (Application Example 1) obtained by using the improved burning agent of Example 1 of the present application is greatly improved.

[0025] The ceramsite proppant products obtained from application example 1 and application example 2 are respectively subjected to performance testing, and the testing results are shown in table 1 and table 2, and it can be known that, compared with using pure coal as a burning agent, the flow conductivity and flowability of the ceramsite proppant product (application example 1) obtained by using the burning agent improved according to the embodiment 1 of the present application are increased, and the breakage rate under a certain pressure is reduced.

[0026]

[0027]

Claims

1. Application of a rotary kiln combustion agent in the preparation of ceramsite proppant, characterized in that: The rotary kiln combustion agent, calculated based on 100% total mass percentage, is composed of: 15%±3% sawdust and the balance coal. The rotary kiln combustion agent is prepared by taking sawdust and coal in proportion, mixing and grinding them together to a size of 150 mesh±20 mesh with a pass rate of more than 80%.

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