阅读说明：本技术 一种陶粒砖的制备方法 (Preparation method of ceramsite brick ) 是由 韩新民 于 2021-03-16 设计创作，主要内容包括：本发明提供了一种陶粒砖的制备方法,包括以下步骤：S1.将去离子水、马来酸、2-吡咯烷酮、十四烷基二甲基苄基氯化铵、壳聚糖、无水乙醇、过硫酸铵反应得到助剂A；S2.将污泥、助剂A混合、搅拌、脱水、烘干得到烘干污泥料；S3.将烘干污泥料干馏、除铁、除石后筛分得到污泥粒料；S4.将污泥粒料高温处理、筛分得到污泥粉料；S5.将无水乙醇、油酸、正丙胺反应得到助剂B；S6.将污泥粉料、助剂B、煤矸石、水混合,搅拌均匀后得到浆料,将浆料压制成型得到陶粒砖坯,将陶粒砖坯烘干后转入蒸压釜中蒸压得到陶粒砖。本发明制备得到的陶粒砖具有较好的力学性能和透水性。(The invention provides a preparation method of a ceramsite brick, which comprises the following steps: s1, reacting deionized water, maleic acid, 2-pyrrolidone, tetradecyl dimethyl benzyl ammonium chloride, chitosan, absolute ethyl alcohol and ammonium persulfate to obtain an auxiliary agent A; s2, mixing, stirring, dehydrating and drying the sludge and the auxiliary agent A to obtain dried sludge; s3, performing dry distillation, iron removal and stone removal on the dried sludge material, and screening to obtain sludge granules; s4, carrying out high-temperature treatment on the sludge granules and screening to obtain sludge powder; s5, reacting absolute ethyl alcohol, oleic acid and n-propylamine to obtain an auxiliary agent B; s6, mixing the sludge powder, the auxiliary B, the coal gangue and water, uniformly stirring to obtain slurry, performing compression molding on the slurry to obtain a ceramsite brick blank, drying the ceramsite brick blank, and transferring the ceramsite brick blank into an autoclave to perform autoclave to obtain the ceramsite brick. The ceramsite brick prepared by the method has good mechanical property and water permeability.)

1. The preparation method of the ceramsite brick is characterized by comprising the following steps of: the method comprises the following steps:

s1, adding deionized water, maleic acid and 1/3 weight of ammonium persulfate into a reaction bottle, adjusting the pH value to 3.5, vacuumizing, introducing nitrogen, starting stirring, heating to 45 ℃, adding 2-pyrrolidone, tetradecyl dimethyl benzyl ammonium chloride, chitosan, absolute ethyl alcohol and 2/3 weight of ammonium persulfate into the reaction bottle, heating to 85 ℃, stirring for reaction for 4-5 hours to obtain a reaction solution, carrying out vacuum filtration on the reaction solution to obtain a solid, washing the solid for 3 times by using absolute ethyl alcohol, and drying at 90 ℃ for 5 hours to obtain an auxiliary A;

s2, mixing the sludge and the aid A obtained in the step S1, stirring until the mixture is uniformly mixed to obtain sludge material, dehydrating the sludge material until the water content is 80-85%, and drying the sludge material in a dryer at 100 ℃ until the water content is 20-25% to obtain dried sludge material;

s3, placing the dried sludge material obtained in the step S2 in a dry distillation gasification furnace, treating at 350-400 ℃ for 2-3 hours to obtain dry distillation sludge material, and screening the dry distillation sludge material after removing iron and stones to obtain sludge granules;

s4, placing the sludge granules obtained in the step S3 in a resistance furnace, heating to 600-650 ℃, preserving heat for 3-4 hours, cooling to room temperature, crushing, and screening to obtain sludge powder;

s5, adding absolute ethyl alcohol, oleic acid and n-propylamine into a reaction bottle, stirring and reacting for 18-24 hours at room temperature to obtain a reactant, carrying out rotary evaporation on the reactant at 50 ℃ for 3 hours to remove the unreacted absolute ethyl alcohol and n-propylamine, carrying out vacuum drying at 90 ℃ for 10 hours to obtain an oleic acid propylamine salt, and uniformly mixing the oleic acid propylamine salt with polyethylene glycol to obtain an auxiliary B;

s6, mixing the sludge powder obtained in the step S4, the auxiliary agent B obtained in the step S5, coal gangue and water, uniformly stirring to obtain slurry, pressing and molding the slurry in a brick press to obtain a ceramsite brick blank, drying the ceramsite brick blank at 50 ℃ for 2 hours, transferring the ceramsite brick blank into an autoclave, and autoclaving at 190 ℃ and 200 ℃ for 8-10 hours to obtain the ceramsite brick.

2. The method for preparing the ceramsite brick according to claim 1, wherein the method comprises the following steps: in the step S1, the proportion of deionized water, maleic acid, ammonium persulfate, 2-pyrrolidone, tetradecyl dimethyl benzyl ammonium chloride, chitosan and absolute ethyl alcohol is 90mL to 3.6g to 1.5g to 4g to 5g to 2g to 50 mL.

3. The method for preparing the ceramsite brick according to claim 1, wherein the method comprises the following steps: in the step S2, the weight ratio of the sludge to the auxiliary A obtained in the step S1 is 1000 (1-2).

4. The method for preparing the ceramsite brick according to claim 1, wherein the method comprises the following steps: in step S3, a 20-mesh sieve is used for sieving.

5. The method for preparing the ceramsite brick according to claim 1, wherein the method comprises the following steps: in the step S4, the temperature rise speed of the resistance furnace is 5 ℃/min, and a 40-mesh sieve is used for sieving.

6. The method for preparing the ceramsite brick according to claim 1, wherein the method comprises the following steps: in the step S5, the ratio of the absolute ethyl alcohol, the oleic acid and the n-propylamine is 600mL:1mol:2.5 mol.

7. The method for preparing the ceramsite brick according to claim 1, wherein the method comprises the following steps: in the step S6, the weight ratio of the sludge powder obtained in the step S4, the auxiliary agent B obtained in the step S5, the coal gangue and the water is 100 (5-6) to 10-15 to 30-40.

8. The method for preparing the ceramsite brick according to claim 1, wherein the method comprises the following steps: in the step S6, the pressure of the steam pressure is 1-1.1 MPa.

Technical Field

The invention relates to a preparation method of a ceramsite brick.

Background

At present, the treatment methods of sludge generated by factories such as sewage treatment and river cleaning are generally discarded, or incinerated or buried, and the treatment methods not only occupy land, but also pollute the environment. After many factories are moved, the land occupied by the original factory building is polluted and needs to be treated.

The ceramsite brick is a concrete hollow block made of light clay ceramsite, and has the advantages of fire resistance, light weight, high strength, heat insulation, moisture resistance and the like. At present, the country prohibits the brick making by opening a mountain and causes the raw materials of the ceramsite brick to be reduced, so related manufacturers develop a method for utilizing waste such as sludge and the like as the raw materials for making the ceramsite brick.

China with the application number of CN201610556992.5 discloses a ceramsite brick, a ceramsite formed by cutting the ceramsite brick and a preparation method of the ceramsite brick. The invention has the following problems: the prepared ceramsite brick has general mechanical properties, and when the ceramsite brick is fixed at the edge of a river channel, flowers, plants and trees cannot grow due to poor water permeability.

Disclosure of Invention

The invention aims to solve the technical problem of providing a preparation method of a ceramsite brick, and the prepared ceramsite brick has good mechanical property and water permeability.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a preparation method of a ceramsite brick comprises the following steps:

s1, adding deionized water, maleic acid and 1/3 weight of ammonium persulfate into a reaction bottle, adjusting the pH value to 3.5, vacuumizing, introducing nitrogen, starting stirring, heating to 45 ℃, adding 2-pyrrolidone, tetradecyl dimethyl benzyl ammonium chloride, chitosan, absolute ethyl alcohol and 2/3 weight of ammonium persulfate into the reaction bottle, heating to 85 ℃, stirring for reaction for 4-5 hours to obtain a reaction solution, carrying out vacuum filtration on the reaction solution to obtain a solid, washing the solid for 3 times by using absolute ethyl alcohol, and drying at 90 ℃ for 5 hours to obtain an auxiliary A;

s2, mixing the sludge and the aid A obtained in the step S1, stirring until the mixture is uniformly mixed to obtain sludge material, dehydrating the sludge material until the water content is 80-85%, and drying the sludge material in a dryer at 100 ℃ until the water content is 20-25% to obtain dried sludge material;

s3, placing the dried sludge material obtained in the step S2 in a dry distillation gasification furnace, treating at 350-400 ℃ for 2-3 hours to obtain dry distillation sludge material, and screening the dry distillation sludge material after removing iron and stones to obtain sludge granules;

s4, placing the sludge granules obtained in the step S3 in a resistance furnace, heating to 600-650 ℃, preserving heat for 3-4 hours, cooling to room temperature, crushing, and screening to obtain sludge powder;

s5, adding absolute ethyl alcohol, oleic acid and n-propylamine into a reaction bottle, stirring and reacting for 18-24 hours at room temperature to obtain a reactant, carrying out rotary evaporation on the reactant at 50 ℃ for 3 hours to remove the unreacted absolute ethyl alcohol and n-propylamine, carrying out vacuum drying at 90 ℃ for 10 hours to obtain an oleic acid propylamine salt, and uniformly mixing the oleic acid propylamine salt with polyethylene glycol to obtain an auxiliary B;

s6, mixing the sludge powder obtained in the step S4, the auxiliary agent B obtained in the step S5, coal gangue and water, uniformly stirring to obtain slurry, pressing and molding the slurry in a brick press to obtain a ceramsite brick blank, drying the ceramsite brick blank at 50 ℃ for 2 hours, transferring the ceramsite brick blank into an autoclave, and autoclaving at 190 ℃ and 200 ℃ for 8-10 hours to obtain the ceramsite brick.

Furthermore, in step S1, the ratio of deionized water to maleic acid to ammonium persulfate to 2-pyrrolidone to tetradecyldimethylbenzylammonium chloride to chitosan to absolute ethyl alcohol is 90mL to 3.6g to 1.5g to 4g to 5g to 2g to 50 mL.

Furthermore, in the step S2, the weight ratio of the sludge to the auxiliary agent A obtained in the step S1 is 1000 (1-2).

Further, in step S3 of the present invention, a 20-mesh sieve is used for the sieving.

In step S4, the temperature of the resistance furnace is raised at a rate of 5 ℃ per minute, and a 40-mesh sieve is used for the sieving.

Further, in step S5 of the present invention, the ratio of the absolute ethanol, the oleic acid, and the n-propylamine is 600mL:1mol:2.5 mol.

Furthermore, in step S6, the weight ratio of the sludge powder obtained in step S4, the auxiliary B obtained in step S5, the coal gangue and the water is 100 (5-6): (10-15): (30-40).

Further, in step S6 of the present invention, the pressure of the autoclave is 1-1.1 MPa.

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

1) the invention takes 2-pyrrolidone, tetradecyl dimethyl benzyl ammonium chloride, chitosan and maleic acid as raw materials, and the auxiliary A is prepared by reaction under the initiation action of ammonium persulfate, and the auxiliary A can effectively improve the binding force of various components in the sludge in the subsequent treatment process after being mixed with the sludge, and can also play a role of reaming in the sludge, thereby improving the compressive strength and the water permeability of the ceramsite brick.

2) According to the invention, oleic acid and n-propylamine are used as raw materials, and absolute ethyl alcohol is used as a solvent to prepare the assistant B through reaction, and the assistant B can effectively improve the dispersibility of sludge powder and coal gangue in slurry and the binding force between the sludge powder and the coal gangue, so that the hardness and the compressive strength of the ceramsite brick are improved.

3) The coal gangue is solid waste discharged in the coal mining process and the coal washing process, and the hardness of the ceramsite brick can be further improved by adding the coal gangue.

4) The main raw materials used for brick making, namely sludge and coal gangue, are wastes, so that the problems of treatment of the sludge and the coal gangue are solved, the purposes of comprehensive utilization of resources and environmental protection and energy conservation are realized, and the prepared ceramsite brick has good mechanical property and water permeability, can be applied to pavement of roads and fixation of riverway edges, and is beneficial to growth of flowers, plants and trees.

Detailed Description

The present invention will be described in detail with reference to specific embodiments, and the exemplary embodiments and descriptions thereof herein are provided to explain the present invention but not to limit the present invention.

Example 1

Preparing the ceramsite brick according to the following steps:

s1, adding deionized water, maleic acid and 1/3 weight of ammonium persulfate into a reaction bottle, adjusting the pH value to 3.5, vacuumizing, introducing nitrogen, starting stirring, heating to 45 ℃, adding 2-pyrrolidone, tetradecyl dimethyl benzyl ammonium chloride, chitosan, absolute ethyl alcohol and 2/3 weight of ammonium persulfate into the reaction bottle, heating to 85 ℃, stirring for reacting for 4.5 hours to obtain a reaction liquid, carrying out vacuum filtration on the reaction liquid to obtain a solid, washing the solid for 3 times by using absolute ethyl alcohol, and drying at 90 ℃ for 5 hours to obtain an auxiliary A, wherein the proportion of the deionized water, the maleic acid, the ammonium persulfate, the 2-pyrrolidone, the tetradecyl dimethyl benzyl ammonium chloride, the chitosan and the absolute ethyl alcohol is 90mL:3.6g:1.5g:4g:5g:2g:50 mL;

s2, mixing the sludge with the weight ratio of 1000:1.5 and the auxiliary agent A obtained in the step S1, stirring until the mixture is uniformly mixed to obtain sludge material, dehydrating the sludge material until the water content is 80-85%, and drying in a dryer at 100 ℃ until the water content is 20-25% to obtain dried sludge material;

s3, placing the dried sludge material obtained in the step S2 in a dry distillation gasification furnace, treating for 2.4 hours at 360 ℃ to obtain dry distillation sludge material, and screening the dry distillation sludge material by using a 20-mesh sieve after removing iron and stones to obtain sludge granules;

s4, placing the sludge granules obtained in the step S3 in a resistance furnace, heating to 640 ℃ at a heating rate of 5 ℃/min, then preserving heat for 3.3 hours, cooling to room temperature, then crushing, and screening with a 40-mesh sieve to obtain sludge powder;

s5, adding absolute ethyl alcohol, oleic acid and n-propylamine with the proportion of 600mL to 1mol to 2.5mol into a reaction bottle, stirring and reacting for 21 hours at room temperature to obtain a reactant, carrying out rotary evaporation on the reactant for 3 hours at 50 ℃ to remove the unreacted absolute ethyl alcohol and n-propylamine, carrying out vacuum drying for 10 hours at 90 ℃ to obtain an oleic acid propylamine salt, and uniformly mixing the oleic acid propylamine salt with polyethylene glycol to obtain an auxiliary agent B;

s6, mixing the sludge powder obtained in the step S4, the auxiliary agent B obtained in the step S5, coal gangue and water in a weight ratio of 100:5.5:12:36, uniformly stirring to obtain slurry, pressing and molding the slurry in a brick press to obtain a ceramsite brick blank, drying the ceramsite brick blank at 50 ℃ for 2 hours, transferring the ceramsite brick blank into an autoclave, and autoclaving at the pressure of 1.05MPa and the temperature of 195 ℃ for 9 hours to obtain the ceramsite brick.

Example 2

Preparing the ceramsite brick according to the following steps:

s1, adding deionized water, maleic acid and 1/3 weight of ammonium persulfate into a reaction bottle, adjusting the pH value to 3.5, vacuumizing, introducing nitrogen, starting stirring, heating to 45 ℃, adding 2-pyrrolidone, tetradecyl dimethyl benzyl ammonium chloride, chitosan, absolute ethyl alcohol and 2/3 weight of ammonium persulfate into the reaction bottle, heating to 85 ℃, stirring for reacting for 4.8 hours to obtain a reaction liquid, carrying out vacuum filtration on the reaction liquid to obtain a solid, washing the solid for 3 times by using absolute ethyl alcohol, and drying at 90 ℃ for 5 hours to obtain an auxiliary A, wherein the proportion of the deionized water, the maleic acid, the ammonium persulfate, the 2-pyrrolidone, the tetradecyl dimethyl benzyl ammonium chloride, the chitosan and the absolute ethyl alcohol is 90mL:3.6g:1.5g:4g:5g:2g:50 mL;

s2, mixing the sludge with the weight ratio of 1000:2 and the auxiliary agent A obtained in the step S1, stirring until the mixture is uniformly mixed to obtain sludge material, dehydrating the sludge material until the water content is 80-85%, and drying the sludge material in a dryer at 100 ℃ until the water content is 20-25% to obtain dried sludge material;

s3, placing the dried sludge material obtained in the step S2 in a dry distillation gasification furnace, treating for 3 hours at 350 ℃ to obtain dry distillation sludge material, and screening the dry distillation sludge material by using a 20-mesh sieve after removing iron and stones to obtain sludge granules;

s4, placing the sludge granules obtained in the step S3 in a resistance furnace, heating to 600 ℃ at a heating rate of 5 ℃/min, then preserving heat for 4 hours, cooling to room temperature, crushing, and screening with a 40-mesh sieve to obtain sludge powder;

s5, adding absolute ethyl alcohol, oleic acid and n-propylamine with the proportion of 600mL to 1mol to 2.5mol into a reaction bottle, stirring and reacting for 24 hours at room temperature to obtain a reactant, carrying out rotary evaporation on the reactant for 3 hours at 50 ℃ to remove the unreacted absolute ethyl alcohol and n-propylamine, carrying out vacuum drying for 10 hours at 90 ℃ to obtain an oleic acid propylamine salt, and uniformly mixing the oleic acid propylamine salt with polyethylene glycol to obtain an auxiliary agent B;

s6, mixing the sludge powder obtained in the step S4, the auxiliary agent B obtained in the step S5, coal gangue and water in a weight ratio of 100:5:15:33, uniformly stirring to obtain slurry, pressing and molding the slurry in a brick press to obtain a ceramsite brick blank, drying the ceramsite brick blank at 50 ℃ for 2 hours, transferring the ceramsite brick blank into an autoclave, and autoclaving at 1MPa and 200 ℃ for 10 hours to obtain the ceramsite brick.

Example 3

Preparing the ceramsite brick according to the following steps:

s1, adding deionized water, maleic acid and 1/3 weight of ammonium persulfate into a reaction bottle, adjusting the pH value to 3.5, vacuumizing, introducing nitrogen, starting stirring, heating to 45 ℃, adding 2-pyrrolidone, tetradecyl dimethyl benzyl ammonium chloride, chitosan, absolute ethyl alcohol and 2/3 weight of ammonium persulfate into the reaction bottle, heating to 85 ℃, stirring for reacting for 4 hours to obtain a reaction liquid, carrying out vacuum filtration on the reaction liquid to obtain a solid, washing the solid for 3 times by using absolute ethyl alcohol, and drying at 90 ℃ for 5 hours to obtain an auxiliary A, wherein the proportion of the deionized water, the maleic acid, the ammonium persulfate, the 2-pyrrolidone, the tetradecyl dimethyl benzyl ammonium chloride, the chitosan and the absolute ethyl alcohol is 90mL:3.6g:1.5g:4g:5g:2g:50 mL;

s2, mixing the sludge with the weight ratio of 1000:1 and the auxiliary agent A obtained in the step S1, stirring until the mixture is uniformly mixed to obtain sludge material, dehydrating the sludge material until the water content is 80-85%, and drying the sludge material in a dryer at 100 ℃ until the water content is 20-25% to obtain dried sludge material;

s3, placing the dried sludge material obtained in the step S2 in a dry distillation gasification furnace, treating for 2 hours at 400 ℃ to obtain dry distillation sludge material, and screening the dry distillation sludge material by using a 20-mesh sieve after removing iron and stones to obtain sludge granules;

s4, placing the sludge granules obtained in the step S3 in a resistance furnace, heating to 650 ℃ at a heating rate of 5 ℃/min, then preserving heat for 3 hours, cooling to room temperature, crushing, and screening with a 40-mesh sieve to obtain sludge powder;

s5, adding absolute ethyl alcohol, oleic acid and n-propylamine with the proportion of 600mL to 1mol to 2.5mol into a reaction bottle, stirring and reacting for 18 hours at room temperature to obtain a reactant, carrying out rotary evaporation on the reactant for 3 hours at 50 ℃ to remove the unreacted absolute ethyl alcohol and n-propylamine, carrying out vacuum drying for 10 hours at 90 ℃ to obtain an oleic acid propylamine salt, and uniformly mixing the oleic acid propylamine salt with polyethylene glycol to obtain an auxiliary agent B;

s6, mixing the sludge powder obtained in the step S4, the auxiliary agent B obtained in the step S5, coal gangue and water in a weight ratio of 100:5.2:11:40, uniformly stirring to obtain slurry, pressing and molding the slurry in a brick press to obtain a ceramsite brick blank, drying the ceramsite brick blank at 50 ℃ for 2 hours, transferring the ceramsite brick blank into an autoclave, and autoclaving at 1.1MPa and 190 ℃ for 10 hours to obtain the ceramsite brick.

Example 4

Preparing the ceramsite brick according to the following steps:

s1, adding deionized water, maleic acid and 1/3 weight of ammonium persulfate into a reaction bottle, adjusting the pH value to 3.5, vacuumizing, introducing nitrogen, starting stirring, heating to 45 ℃, adding 2-pyrrolidone, tetradecyl dimethyl benzyl ammonium chloride, chitosan, absolute ethyl alcohol and 2/3 weight of ammonium persulfate into the reaction bottle, heating to 85 ℃, stirring for 5 hours to obtain a reaction solution, carrying out vacuum filtration on the reaction solution to obtain a solid, washing the solid for 3 times by using absolute ethyl alcohol, and drying at 90 ℃ for 5 hours to obtain an auxiliary A, wherein the proportion of the deionized water, the maleic acid, the ammonium persulfate, the 2-pyrrolidone, the tetradecyl dimethyl benzyl ammonium chloride, the chitosan and the absolute ethyl alcohol is 90mL:3.6g:1.5g:4g:5g:2g:50 mL;

s2, mixing the sludge with the weight ratio of 1000:1.2 and the auxiliary agent A obtained in the step S1, stirring until the mixture is uniformly mixed to obtain sludge material, dehydrating the sludge material until the water content is 80-85%, and drying in a dryer at 100 ℃ until the water content is 20-25% to obtain dried sludge material;

s3, placing the dried sludge material obtained in the step S2 in a dry distillation gasification furnace, treating for 2.5 hours at 350 ℃ to obtain dry distillation sludge material, and screening the dry distillation sludge material by using a 20-mesh sieve after removing iron and stones to obtain sludge granules;

s4, placing the sludge granules obtained in the step S3 in a resistance furnace, heating to 660 ℃ at a heating rate of 5 ℃/min, then preserving heat for 3.2 hours, cooling to room temperature, then crushing, and screening with a 40-mesh sieve to obtain sludge powder;

s5, adding absolute ethyl alcohol, oleic acid and n-propylamine with the proportion of 600mL to 1mol to 2.5mol into a reaction bottle, stirring and reacting for 20 hours at room temperature to obtain a reactant, carrying out rotary evaporation on the reactant for 3 hours at 50 ℃ to remove the unreacted absolute ethyl alcohol and n-propylamine, carrying out vacuum drying for 10 hours at 90 ℃ to obtain an oleic acid propylamine salt, and uniformly mixing the oleic acid propylamine salt with polyethylene glycol to obtain an auxiliary agent B;

s6, mixing the sludge powder obtained in the step S4, the auxiliary agent B obtained in the step S5, coal gangue and water in a weight ratio of 100:6:10:30, uniformly stirring to obtain slurry, pressing and molding the slurry in a brick press to obtain a ceramsite brick blank, drying the ceramsite brick blank at 50 ℃ for 2 hours, transferring the ceramsite brick blank into an autoclave, and autoclaving at 195 ℃ for 9.5 hours under the pressure of 1.05MPa to obtain the ceramsite brick.

Reference example 1

Unlike example 1, the following points are present: step S2 is changed to: dehydrating the sludge until the water content is 80-85%, and drying in a dryer at 100 ℃ until the water content is 20-25% to obtain dried sludge; step S1 is removed. I.e. without the use of auxiliary A.

Reference example 2

Unlike example 1, the following points are present: step S6 is changed to: mixing the sludge powder obtained in the step S4, the coal gangue and water in the weight ratio of 100:12:36, uniformly stirring to obtain slurry, putting the slurry into a brick press to press and mold to obtain a ceramsite brick blank, drying the ceramsite brick blank at 50 ℃ for 2 hours, transferring the ceramsite brick blank into an autoclave, and autoclaving at 195 ℃ for 9 hours under the pressure of 1.05MPa to obtain a ceramsite brick; step S5 is removed. I.e. without the use of auxiliary B.

Reference example 3

Unlike example 1, the following points are present: step S6 is changed to: and (3) mixing the sludge powder obtained in the step S4, the auxiliary agent B obtained in the step S5 and water in a weight ratio of 100:5.5:36, uniformly stirring to obtain slurry, putting the slurry into a brick press to press and mold to obtain a ceramsite brick blank, drying the ceramsite brick blank at 50 ℃ for 2 hours, transferring the ceramsite brick blank into an autoclave, and autoclaving at 195 ℃ for 9 hours under the pressure of 1.05MPa to obtain the ceramsite brick. Namely, coal gangue is not used.

Comparative example: example 1 of the chinese invention having application number CN 201610556992.5.

The first experimental example:

the compression strength of the ceramsite bricks prepared in examples 1-4, reference examples 1-3 and comparative example is respectively determined by reference to GB/T4111-2013. The results of the experiment are shown in table 1:

TABLE 1

As can be seen from Table 1, the compression strength of the ceramsite bricks prepared in the examples 1-4 of the invention is much higher than that of the comparative example, which shows that the ceramsite bricks prepared in the invention have higher compression strength. The steps of reference examples 1-3 are different from example 1 in part, and the compressive strength of reference example 1 and reference example 2 is reduced slightly compared with example 1, which shows that the auxiliary A and the auxiliary B used in the invention can improve the compressive strength of the ceramsite brick.

Experiment example two:

the microhardness values of the ceramsite bricks prepared in examples 1-4, reference examples 1-3 and comparative example were measured, and the experimental conditions were as follows: the load is 1kg, the load-holding time is 15 seconds, and the microhardness value is obtained by looking up a table after measuring the length of the diagonal line. Higher microhardness values indicate better hardness. The results of the experiment are shown in table 2:

	microhardness value (HV)
		Example 1	224
Example 2	213
		Example 3	219
Example 4	222
		Reference example 1	223
Reference example 2	198
		Reference example 3	181
Comparative example	167

TABLE 2

As can be seen from Table 2, the microhardness values of the ceramsite bricks prepared in examples 1-4 of the invention are much higher than those of the comparative examples, which indicates that the ceramsite bricks prepared in the invention have better hardness. The steps of reference examples 1-3 are different from example 1 in part, and compared with example 1, the microhardness values of reference example 2 and reference example 3 are reduced a little, which shows that the assistant B and coal gangue used in the invention can improve the hardness of the ceramsite brick.

Experiment example three:

the water permeability of the ceramsite bricks prepared in examples 1-4, reference examples 1-3 and comparative example is respectively measured by a water permeability instrument with reference to JC/T945-. The results of the experiment are shown in table 3:

	water permeability (. times.10)-2cm·s-1)
		Example 1	3.07
Example 2	3.08
		Example 3	3.03
Example 4	3.05
		Reference example 1	1.79
Reference example 2	3.07
		Reference example 3	3.07
Comparative example	0.86

TABLE 3

As can be seen from Table 3, the water permeability of the ceramsite bricks prepared in the examples 1-4 of the invention is much higher than that of the comparative example, which shows that the ceramsite bricks prepared in the invention have better water permeability. The partial steps of reference examples 1-3 are different from example 1, and the water permeability of reference example 1 is obviously reduced compared with example 1, which shows that the auxiliary A used in the invention can improve the water permeability of the ceramsite brick.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.