CN112047751A - Method for producing foamed ceramic by using sludge, coal gangue and waste kinescope glass - Google Patents
Method for producing foamed ceramic by using sludge, coal gangue and waste kinescope glass Download PDFInfo
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- CN112047751A CN112047751A CN202010951462.7A CN202010951462A CN112047751A CN 112047751 A CN112047751 A CN 112047751A CN 202010951462 A CN202010951462 A CN 202010951462A CN 112047751 A CN112047751 A CN 112047751A
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- Prior art keywords
- sludge
- minutes
- waste
- coal gangue
- powder
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention relates to a method for producing foamed ceramics by using sludge, coal gangue and waste kinescope glass, belonging to the technical field of building material manufacture. The invention provides an energy-saving and environment-friendly method for producing foamed ceramics by using dry sludge, coal gangue and waste kinescope glass. A method for producing foamed ceramics by using sludge, coal gangue and waste kinescope glass, 40-50 parts of dried sludge, 30-40 parts of coal gangue, 10-20 parts of kinescope glass and 0.1-0.15 part of 200-mesh silicon carbide are ground into 200 meshes; preparing into powder of 40-80 meshes by a spray drying tower; and filling the powder into a mold, firing the powder for 30 to 60 minutes at the high temperature of 950-1050 ℃ through a roller kiln, and rapidly cooling to obtain the foamed ceramic.
Description
Technical Field
The invention relates to a method for producing foamed ceramics by using sludge, coal gangue and waste kinescope glass, belonging to the technical field of building material manufacture.
Background
The foamed ceramic is a closed-pore ceramic material with high porosity, which is prepared by taking argil tailings, ceramic fragments, river silt and the like as main raw materials and roasting at high temperature by adopting an advanced production process and a foaming technology. In the production process, a foaming agent is required to be added to enable the molding material to form air holes, and in the aspect of waste utilization, although various application requirements of the environment-friendly ceramic material can be met, in the aspect of material cost, the space can be obviously increased. The industrial solid waste produced in China each year reaches billions of tons, the reprocessing utilization rate is low, and the environmental pollution is serious. The development of various industrial waste treatment technologies to promote the recycling of industrial wastes has become a necessary trend of technical development in a new period.
Disclosure of Invention
The invention aims to solve the technical problem of providing an energy-saving and environment-friendly method for producing foamed ceramics by using dry sludge, coal gangue and waste kinescope glass.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for producing foamed ceramics by utilizing sludge, coal gangue and waste kinescope glass is characterized in that 40-50 parts of dried sludge, 30-40 parts of coal gangue, 10-20 parts of kinescope glass and 0.1-0.15 part of 200-mesh silicon carbide are ground into 200 meshes; preparing into powder of 40-80 meshes by a spray drying tower; and filling the powder into a mold, firing the powder for 30 to 60 minutes at the high temperature of 950-1050 ℃ through a roller kiln, and rapidly cooling to obtain the foamed ceramic.
The temperature rise process of the roller kiln comprises the following steps: heating from normal temperature to 600 ℃ in 40-60 minutes, heating to 900 ℃ in 60-90 minutes, and heating to 950 or 1050 ℃ in 60-90 minutes.
The rapid cooling process comprises the following steps: the temperature is reduced to 800 ℃ after 20 minutes, reduced to 300 ℃ after 90-120 minutes, and reduced to 100 ℃ after 60-90 minutes.
The sludge is the sludge of a sewage treatment plant.
Advantageous effects of the invention
According to the invention, the autogenous heat values of the sludge and the coal gangue are utilized, so that the fuel consumption for the kiln can be saved, the rapid heating process is realized, and simultaneously, the heating uniformity of the raw materials on the upper layer and the lower layer is better, and the air holes are more uniform; the waste kinescope glass is used as a foaming agent to produce foamed ceramics, liquid phase is generated by sintering, the foaming agent generates gas after oxidation and reduction in a high temperature state, the gas is wrapped in the high temperature liquid phase in a bubble form, and porous foamed ceramics are obtained after cooling; rapid cooling is adopted, so that bubbles on the upper layer and the lower layer are not rapidly expanded, and the product quality is ensured; the invention can treat a large amount of industrial solid wastes, has good energy-saving and environment-friendly effects and has obvious economic and social benefits.
Detailed Description
Example 1
Grinding 50 parts of dried sludge from a sewage treatment plant, 30 parts of coal gangue, 20 parts of kinescope glass and 0.15 part of 200-mesh silicon carbide into 200 meshes; preparing into powder of 40-80 meshes by a spray drying tower; the powder is filled into a die and is fired at high temperature through a roller kiln, the specific process is that the temperature is raised to 600 ℃ from normal temperature after 60 minutes, at the moment, the combustion substances in the coal gangue and the sludge start to burn to provide heat, the fuel consumption of the kiln is saved, the temperature rise process is accelerated for the material, the uniformity of heating of the upper layer raw material and the lower layer raw material is better, and the air holes are more uniform. And raising the temperature to 900 ℃ after 90 minutes, raising the temperature to 950 ℃ after 60 minutes, and preserving the temperature at 950 ℃ for 60 minutes to finish high-temperature firing. Under the high-temperature condition, the material can generate a liquid phase, the foaming agent generates gas after oxidation and reduction, and the gas is wrapped in the high-temperature liquid phase in a bubble form. And (3) rapidly cooling after firing is finished, wherein the temperature is reduced to 800 ℃ after 20 minutes, is reduced to 300 ℃ after 90 minutes, and is finally reduced to 100 ℃ after 60 minutes, so that the foamed ceramic is prepared. Through the rapid cooling, the bubbles on the upper layer and the lower layer are ensured not to be rapidly expanded, and the product quality is ensured.
Example 2
Grinding 45 parts of dried sludge, 40 parts of coal gangue, 15 parts of kinescope glass and 200-mesh silicon carbide with the granularity of 0.12 into 200 meshes; preparing into powder of 40-80 meshes by a spray drying tower; and filling the powder into a mold, and firing the powder through a roller kiln. After 60 minutes, 90 minutes and 60 minutes, respectively, the temperature is raised from the normal temperature to 600 ℃, 900 ℃ and 1000 ℃, and the temperature is kept at 1000 ℃ for 60 minutes, thereby completing the high-temperature firing. And then respectively cooling the ceramic materials from 1000 ℃ to 800 ℃, 300 ℃ and 100 ℃ for 20 minutes, 90 minutes and 60 minutes to obtain the foamed ceramic.
Example 3
Grinding 40 parts of dried sludge, 50 parts of coal gangue, 10 parts of kinescope glass and 0.1 part of 200-mesh silicon carbide into 200 meshes; preparing into powder of 40-80 meshes by a spray drying tower; and filling the powder into a mold, and firing the powder through a roller kiln. After 60 minutes, 60 minutes and 70 minutes respectively, the temperature is raised from the normal temperature to 600 ℃, 900 ℃ and 1050 ℃, and the temperature is kept at 1050 ℃ for 30 minutes, thus finishing the high-temperature firing. And then respectively cooling the mixture from 1050 ℃ to 800 ℃, 300 ℃ and 100 ℃ for 20 minutes, 90 minutes and 70 minutes to finish the cooling process, thus obtaining the foamed ceramic.
Claims (4)
1. A method for producing foamed ceramics by using sludge, coal gangue and waste kinescope glass is characterized in that 40-50 parts of dried sludge, 30-40 parts of coal gangue, 10-20 parts of kinescope glass and 0.1-0.15 part of 200-mesh silicon carbide are ground into 200 meshes; preparing into powder of 40-80 meshes by a spray drying tower; and filling the powder into a mold, firing the powder for 30 to 60 minutes at the high temperature of 950-1050 ℃ through a roller kiln, and rapidly cooling to obtain the foamed ceramic.
2. The method for producing foamed ceramics by using sludge, coal gangue and waste kinescope glass as claimed in claim 1, wherein the temperature rise process of the roller kiln comprises: heating from normal temperature to 600 ℃ in 40-60 minutes, heating to 900 ℃ in 60-90 minutes, and heating to 950 or 1050 ℃ in 60-90 minutes.
3. The method for producing foamed ceramics using sludge, coal refuse and waste kinescope glass as claimed in claim 1, wherein the rapid cooling process comprises: the temperature is reduced to 800 ℃ after 20 minutes, reduced to 300 ℃ after 90-120 minutes, and reduced to 100 ℃ after 60-90 minutes.
4. The method for producing foamed ceramics using sludge, coal refuse and waste kinescope glass as claimed in claim 1, wherein the sludge is sludge from sewage treatment plants.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951462.7A CN112047751A (en) | 2020-09-11 | 2020-09-11 | Method for producing foamed ceramic by using sludge, coal gangue and waste kinescope glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951462.7A CN112047751A (en) | 2020-09-11 | 2020-09-11 | Method for producing foamed ceramic by using sludge, coal gangue and waste kinescope glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112047751A true CN112047751A (en) | 2020-12-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010951462.7A Withdrawn CN112047751A (en) | 2020-09-11 | 2020-09-11 | Method for producing foamed ceramic by using sludge, coal gangue and waste kinescope glass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112047751A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1559947A (en) * | 2004-02-23 | 2005-01-05 | 中国家用电器研究院 | Method of producing foam glass using wate picture tube |
| DE102011016606A1 (en) * | 2011-04-09 | 2012-10-11 | TDC Trade, Development & Construction Limited | Process for the production of glass foam products with recycling of waste glass mixture |
| DE102011075189A1 (en) * | 2011-05-03 | 2012-11-08 | Griag Glasrecycling Ag | Raw mass, useful for producing ceramics, comprises a proportion of crushed picture tube glass |
| CN107188601A (en) * | 2016-03-15 | 2017-09-22 | 新岛世纪（北京）新型材料技术有限公司 | A kind of method that utilization city sewage and sludge prepares light porous haydite |
-
2020
- 2020-09-11 CN CN202010951462.7A patent/CN112047751A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1559947A (en) * | 2004-02-23 | 2005-01-05 | 中国家用电器研究院 | Method of producing foam glass using wate picture tube |
| DE102011016606A1 (en) * | 2011-04-09 | 2012-10-11 | TDC Trade, Development & Construction Limited | Process for the production of glass foam products with recycling of waste glass mixture |
| DE102011075189A1 (en) * | 2011-05-03 | 2012-11-08 | Griag Glasrecycling Ag | Raw mass, useful for producing ceramics, comprises a proportion of crushed picture tube glass |
| CN107188601A (en) * | 2016-03-15 | 2017-09-22 | 新岛世纪（北京）新型材料技术有限公司 | A kind of method that utilization city sewage and sludge prepares light porous haydite |
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Application publication date: 20201208 |