阅读说明：本技术 一种疏浚底泥资源化利用方法及应用 (Dredged sediment resource utilization method and application ) 是由 朱聪旭 张寒露 胡丽娟 李晓华 焦迎乐 郝立新 王冰 司文青 李知声 于 2020-05-20 设计创作，主要内容包括：本发明公开了一种疏浚底泥资源化利用方法及应用,首先将疏浚底泥在干燥箱充分干燥并通过机械研磨为粉状,将粉状疏浚底泥过网孔筛制得SJ粉；然后将SJ粉、碳酸钙、碳酸钡、聚乙二醇、去离子水按照一定比例混合均匀配制为SJ釉浆,采用浸釉或刷釉法将SJ釉料施加于素烧陶瓷坯体表面,将施有SJ釉素坯充分干燥后置于程序可控高温炉中在还原气氛条件下烧制,得到表面光滑的陶瓷釉产品。(The invention discloses a dredged sediment resource utilization method and application, firstly, the dredged sediment is fully dried in a drying box and is mechanically ground into powder, and the powder dredged sediment is screened by a mesh screen to prepare SJ powder; then SJ powder, calcium carbonate, barium carbonate, polyethylene glycol and deionized water are uniformly mixed according to a certain proportion to prepare SJ glaze slurry, an SJ glaze material is applied to the surface of the biscuit firing ceramic blank by adopting a glaze dipping or glaze brushing method, the biscuit with the SJ glaze is fully dried and then placed in a program-controlled high-temperature furnace to be fired under the condition of reducing atmosphere, and a ceramic glaze product with a smooth surface is obtained.)

1. A dredged sediment resource utilization method is characterized by comprising the following steps: the method comprises the following steps:

step 1, fully drying dredged sediment in a drying oven, mechanically grinding the dredged sediment into powder, and sieving the powder dredged sediment through a 180-mesh sieve to prepare SJ powder;

step 2, uniformly mixing SJ powder, calcium carbonate, barium carbonate, polyethylene glycol and deionized water according to a certain proportion to prepare SJ glaze slurry;

step 3, placing the ceramic biscuit into a program-controllable high-temperature furnace, setting the heating rate to be 5 ℃/min, heating to 880 ℃, keeping the temperature for 30min, and then cooling along with the furnace under the air atmosphere condition to obtain a biscuit ceramic blank;

step 4, applying the SJ glaze slip prepared in the step 2 to the surface of the biscuit firing ceramic blank prepared in the step 3 by adopting a glaze dipping or brushing method, and fully drying in an air drying oven to obtain a dry-applied SJ glaze ceramic biscuit;

and 5, placing the dried and SJ glaze ceramic biscuit in a program-controllable high-temperature furnace, and firing under the reducing atmosphere condition to obtain a ceramic glaze product with a smooth surface.

2. The dredged sediment resource utilization method as claimed in claim 1, wherein in the step 1, the drying temperature in the drying oven is 80-100 ℃, the drying time is 12-24 h, and the mechanical grinding is alternately clockwise-counterclockwise grinding in an agate mortar for 1-3 h.

3. The dredged sediment resource utilization method of claim 2, wherein the SJ powder, the calcium carbonate, the barium carbonate, the polyethylene glycol and the deionized water in the step 2 are prepared according to the mass ratio of (SJ powder: calcium carbonate: barium carbonate: polyethylene glycol: deionized water) = (10-15): 0.2-1.0): 1-1.5): 15) and are magnetically stirred for 1-3 h under the condition of 300 r/min to obtain SJ glaze slurry.

4. The dredged sediment resource utilization method of claim 3, wherein the polyethylene glycol in the step 2 is polyethylene glycol 6000.

5. The dredged sediment resource utilization method of claim 4, wherein the ceramic biscuit in the step 4 comprises 60% of kaolin, 26% of quartz and 14% of feldspar.

6. The dredged sediment resource utilization method as claimed in claim 5, wherein the sufficient drying condition of the SJ glaze ceramic biscuit applied in the step 4 is that the SJ glaze ceramic biscuit is put into a forced air drying oven and dried for 10-18 h at a set temperature of 80-100 ℃.

7. The dredged sediment resource utilization method of claim 6, wherein the thickness of the glaze layer of the ceramic biscuit with SJ glaze applied in the step 4 is 0.8-1.2 mm.

8. The dredged sediment resource utilization method of claim 7, wherein the firing temperature of the ceramic biscuit with the SJ glaze applied in the step 5 is 1280-1310 ℃, the heating rate is 3-5 ℃/min, the heat preservation time in the firing process is 20-30 min, and the dredged sediment is cooled along with the furnace after being fired.

9. The dredged sediment resource utilization method of claim 8, wherein the reducing atmosphere in the firing process in the step 5 is 95% Ar +5% H₂And (4) mixing the atmosphere.

10. Use of the method according to any one of claims 1 to 9, wherein: the dredged sediment resource utilization method can be applied to the preparation of ceramic glaze.

Technical Field

The invention relates to the technical field of recovery and reutilization of dredged sediment, in particular to a dredged sediment resource utilization method and application.

Background

At present, with the increasing importance of the water quality and water body problem in China, the amount of dredged sediment produced by dredging engineering is increasing, but the disposal of the dredged sediment has a great problem. Conventional methods for treating the dredged sediment comprise stacking, hydraulic filling, ocean mud dumping and the like, and the conventional methods solve the problem of dredging the dredged sediment and cause other problems, so the method is more and more critical to the recovery and reuse of the dredged sediment. The dredged sediment contains a large amount of silicate and other metal ions, and is vitrified in a high-temperature environment by adding other mineral raw materials, so that a novel resource utilization method of the dredged sediment is developed.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a dredged sediment resource utilization method and application thereof, which can prepare ceramic glaze products with different color generation effects from dredged sediment under simple conditions, so as to achieve environment-friendly resource utilization of the dredged sediment.

In order to achieve the purpose, the invention adopts the technical scheme that:

a dredged sediment resource utilization method comprises the following steps:

step 1, fully drying dredged sediment in a drying oven, mechanically grinding the dredged sediment into powder, and sieving the powder dredged sediment through a 180-mesh sieve to prepare SJ powder;

step 2, uniformly mixing SJ powder, calcium carbonate, barium carbonate, polyethylene glycol and deionized water according to a certain proportion to prepare SJ glaze slurry;

step 3, placing the ceramic biscuit into a program-controllable high-temperature furnace, setting the heating rate to be 5 ℃/min, heating to 880 ℃, keeping the temperature for 30min, and then cooling along with the furnace under the air atmosphere condition to obtain a biscuit ceramic blank;

step 4, applying the SJ glaze slip prepared in the step 2 to the surface of the biscuit firing ceramic blank prepared in the step 3 by adopting a glaze dipping or brushing method, and fully drying in an air drying oven to obtain a dry-applied SJ glaze ceramic biscuit;

and 5, placing the dried and SJ glaze ceramic biscuit in a program-controllable high-temperature furnace, and firing under the reducing atmosphere condition to obtain a ceramic glaze product with a smooth surface.

Preferably, in the step 1, the drying temperature in a drying oven is 80-100 ℃, the drying time is 12-24 hours, and the mechanical grinding is clockwise-anticlockwise alternate grinding for 1-3 hours in an agate mortar.

Preferably, in the step 2, the SJ powder, the calcium carbonate, the barium carbonate, the polyethylene glycol and the deionized water are SJ powder according to the mass ratio: calcium carbonate: barium carbonate: polyethylene glycol: deionized water (10-15) = (0.2-1.0): 1-1.5): 15, and magnetically stirring for 1-3 hours under the condition of 300 r/min to obtain SJ glaze slip.

Preferably, the polyethylene glycol in the step 2 is polyethylene glycol 6000.

Preferably, the formula of the ceramic biscuit in the step 4 is 60% of kaolin, 26% of quartz and 14% of feldspar.

Preferably, the condition for fully drying the SJ glaze-applied ceramic biscuit in the step 4 is that the SJ glaze-applied ceramic biscuit is put into an air-blast drying oven and dried for 10-18 h at the set temperature of 80-100 ℃.

Preferably, the thickness of the glaze layer of the SJ glaze ceramic biscuit applied in the step 4 is 0.8-1.2 mm.

Preferably, the firing temperature of the SJ glaze ceramic biscuit applied in the step 5 is 1280-1310 ℃, the heating rate is 3-5 ℃/min, the heat preservation time in the firing process is 20-30 min, and the ceramic biscuit is cooled along with the furnace after being fired.

Preferably, the reducing atmosphere during the firing in the step 5 is 95% Ar +5% H₂And (4) mixing the atmosphere.

The dredged sediment recycling method can be applied to the preparation of ceramic glaze.

Drawings

FIG. 1 is a macroscopic color rendering effect diagram of example 1 of the present invention;

FIG. 2 is a UV-VIS reflectance spectrum of example 1 of the present invention;

FIG. 3 is a macroscopic color rendering effect diagram of example 2 of the present invention;

FIG. 4 is a macroscopic rendering effect diagram of example 3 of the present invention;

FIG. 5 is a macroscopic rendering effect diagram of example 4 of the present invention;

FIG. 6 is a macroscopic rendering effect diagram of example 5 of the present invention;

fig. 7 is a macroscopic color rendering effect diagram of example 6 of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood and practical for those skilled in the art, the present invention is further described with reference to the following drawings and specific examples, which are not intended to limit the present invention.

The test methods not specifically described in the following examples were carried out according to the conventional methods and conditions in the art, and the materials used were commercially available unless otherwise specified.