Production process of silicate cement clinker under the conditions of coordinated utilization of complex multi-source solid waste

Abstract

The present invention provides a silicate cement clinker production process under the conditions of complex multi-source solid waste coordinated utilization, and relates to the technical field of solid waste treatment. The silicate cement clinker production process under the conditions of complex multi-source solid waste coordinated utilization specifically includes the following steps: S1. Collecting and classifying solid waste from various sources; S2. Pre-treating the solid waste to remove impurities and adjust the particle size and composition. The present invention reduces dependence on a single resource, improves resource utilization and production flexibility, optimizes the ratio to ensure stable product quality, and significantly reduces energy consumption through the use of solid waste resources. It partially replaces traditional fuels, simplifies process control procedures, reduces operational difficulty, and improves production efficiency. In addition, the use of solid waste reduces raw material and processing costs, brings significant economic benefits, and achieves good environmental protection and social effects by reducing greenhouse gas emissions and solid waste treatment problems. The equipment has strong adaptability and can adapt to the transformation of existing equipment, reducing new investment needs.

Description

Technical Field

[0001] The invention relates to the technical field of solid waste treatment, and in particular to a process for producing silicate cement clinker under the conditions of coordinated utilization of complex multi-source solid wastes. Background Art

[0002] The production process of Portland cement clinker is a complex process, which mainly includes steps such as raw material preparation, raw material preheating, raw material decomposition, clinker burning, cooling and grinding, and quality control. In the raw material preparation stage, raw materials such as limestone, clay and iron ore are mainly used, which are crushed, screened and mixed to make raw material slurry. Then, the raw material is preheated to 800-1000℃ in a preheater to remove moisture and volatile substances, and then calcium carbonate is decomposed at high temperature in a decomposition furnace to generate calcium oxide. Subsequently, the decomposed raw material enters a rotary kiln for high-temperature burning to form cement clinker. Finally, the clinker is quickly cooled by a cooler and finely ground into cement clinker fine powder that meets the requirements by a grinder. Throughout the process, strict quality control is required, including the testing of chemical composition and physical properties, and the production process is adjusted according to the test results to ensure stable product quality.

[0003] However, there are some disadvantages in the traditional production process of Portland cement clinker. First, the problem of resource waste is prominent because it mainly relies on raw materials from a single source, such as limestone and clay, which leads to over-exploitation of these resources. Secondly, the production process causes serious environmental pollution, including large amounts of waste gas, wastewater and waste residue emissions, especially carbon dioxide emissions, which have a serious impact on the environment. In addition, the production cost is high, and the procurement, transportation and treatment costs of raw materials are expensive, and as resources are depleted, the cost will rise further. The traditional production process has poor flexibility and it is difficult to flexibly adjust the raw material ratio, which limits the utilization of solid waste resources from different sources. Finally, the process is highly complex, with many control parameters, and high requirements for equipment and personnel, which increases the difficulty of operation and management costs. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a silicate cement clinker production process under the conditions of complex multi-source solid waste coordinated utilization, which solves the problem of high cost in the prior art.

[0005] To achieve the above objectives, the present invention is implemented by the following technical scheme: a silicate cement clinker production process under the conditions of complex multi-source solid waste coordinated utilization, specifically comprising the following steps:

[0006] S1. Collect and sort solid waste from various sources;

[0007] S2. Pre-treating solid waste to remove impurities and adjust particle size and composition;

[0008] S3. Conduct detailed chemical composition analysis of solid waste;

[0009] S4. Optimize the ratio of solid waste to traditional raw materials based on the results of component analysis;

[0010] S5. Evenly mix the optimized solid waste raw materials with the traditional raw materials;

[0011] S6. The mixed raw materials are sent to a preheater and preheated to 800-1000°C;

[0012] S7. The preheated raw materials are sent to the decomposition furnace and decomposed at a high temperature of 1450-1550°C;

[0013] S8. The decomposed material is sent to a rotary kiln for high temperature calcination, and the high temperature calcined silicate cement clinker is quickly cooled to 100-200°C by a cooler;

[0014] S9. The cooled clinker is sent to a grinding mill for fine grinding to form cement clinker fine powder that meets the requirements.

[0015] Preferably, the solid waste includes industrial waste, urban solid waste and agricultural waste.

[0016] Preferably, the pretreatment step includes crushing, screening and magnetic separation.

[0017] Preferably, the composition analysis includes determining the content of the main elements of silicon, calcium, aluminum and iron in the solid waste.

[0018] Preferably, the production process also includes testing the chemical composition and physical properties of the cement clinker finally produced, and making necessary process adjustments based on the test results.

[0019] The present invention provides a silicate cement clinker production process under the conditions of complex multi-source solid waste coordinated utilization. It has the following beneficial effects:

[0020] The present invention provides a silicate cement clinker production process under the condition of complex multi-source solid waste coordinated utilization. The present invention reduces dependence on traditional single resources and improves resource utilization efficiency by utilizing solid waste from multiple sources. The utilization of solid waste reduces pollution to the environment, especially reduces the emission of greenhouse gases such as carbon dioxide, and has good environmental protection effects. The use of solid waste as raw materials reduces the procurement and treatment costs of raw materials and improves economic benefits. By optimizing the ratio of solid waste, the present technology can flexibly adjust the raw material combination, adapt to solid waste resources from different sources, and improve production flexibility. Through detailed component analysis and optimized ratio, it is ensured that the chemical composition of raw materials meets production requirements, and the quality of the final product is stable. Solid waste can be used as a fuel to partially replace traditional fuel during preheating and decomposition, thereby reducing energy consumption. The equipment has strong adaptability, and the existing production equipment can be adapted to the present technology after appropriate modification, without the need for a large amount of investment in new equipment. By optimizing process parameters, the control process is simplified, the operation difficulty is reduced, and the production efficiency is improved. The utilization of solid waste not only reduces the cost of raw materials, but also obtains additional economic benefits through solid waste treatment. The present technology helps to solve the problem of solid waste treatment, alleviate the solid waste pressure of cities and industries, and has good social effects. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] The embodiment of the present invention provides a process for producing silicate cement clinker under the conditions of coordinated utilization of complex multi-source solid wastes, which is characterized by comprising the following steps:

[0023] S1. Collect and sort solid waste from various sources;

[0024] S2. Pre-treating solid waste to remove impurities and adjust particle size and composition;

[0025] S3. Conduct detailed chemical composition analysis of solid waste;

[0026] S4. Optimize the ratio of solid waste to traditional raw materials based on the results of component analysis;

[0027] S5. Evenly mix the optimized solid waste raw materials with the traditional raw materials;

[0028] S6. The mixed raw materials are sent to a preheater and preheated to 800-1000°C;

[0029] S7. The preheated raw materials are sent to the decomposition furnace and decomposed at a high temperature of 1450-1550°C;

[0030] S8. The decomposed material is sent to a rotary kiln for high temperature calcination, and the high temperature calcined silicate cement clinker is quickly cooled to 100-200°C by a cooler;

[0031] S9. The cooled clinker is sent to a grinding mill for fine grinding to form cement clinker fine powder that meets the requirements.

[0032] Solid waste includes industrial waste, municipal solid waste and agricultural waste. Pretreatment steps include crushing, screening and magnetic separation. Composition analysis includes determining the content of the main elements of silicon, calcium, aluminum and iron in solid waste. The production process also includes testing the chemical composition and physical properties of the final cement clinker, and making necessary process adjustments based on the test results.

[0033] Specifically:

[0034] Solid waste classification and pretreatment

[0035] Collection and classification: Collect industrial waste (such as fly ash, coal gangue, steel slag, red mud, etc.), urban solid waste (such as construction waste, domestic garbage, etc.) and agricultural waste (such as straw, rice husk, etc.), and classify them according to source and composition.

[0036] Pretreatment: According to the different characteristics of solid waste, necessary pretreatment is carried out, such as crushing, screening, magnetic separation, etc., to remove impurities and adjust the particle size and composition.

[0037] Solid waste resource utilization

[0038] Composition analysis: Conduct a detailed chemical composition analysis on each solid waste to determine the content of major elements such as silicon, calcium, aluminum, and iron.

[0039] Ratio optimization: According to the results of component analysis and the production requirements of Portland cement clinker, the ratio of various solid wastes is optimized to ensure that the chemical composition of the raw materials meets the production requirements.

[0040] Even mixing: The optimized solid waste raw materials are evenly mixed through a mixer to form a stable raw material mixture.

[0041] Raw material mixing and preheating

[0042] Raw material mixing: Mix solid waste raw materials with traditional raw materials (such as limestone, clay, iron ore, etc.) in an optimized ratio.

[0043] Preheating: The mixed raw materials are sent to the preheater and preheated to 800-1000℃ to remove moisture and some volatile substances and improve the sintering efficiency of the raw materials.

[0044] Calcination process

[0045] Decomposition furnace: The preheated raw materials are fed into the decomposition furnace, where the calcium carbonate in the raw materials is decomposed into calcium oxide through high-temperature decomposition (1450-1550°C), while promoting the decomposition and volatilization of harmful substances in the solid waste.

[0046] Rotary kiln: The decomposed materials are sent to the rotary kiln for high-temperature calcination to form Portland cement clinker. The temperature of the rotary kiln is controlled at 1450-1550℃ to ensure that the materials react fully.

[0047] Cooling and grinding

[0048] Cooling: The high temperature fired Portland cement clinker is quickly cooled to 100-200℃ through a cooler to prevent the material from agglomerating due to high temperature.

[0049] Grinding: The cooled clinker is fed into a grinding mill for fine grinding to form cement clinker fine powder that meets the requirements.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for producing silicate cement clinker under the conditions of coordinated utilization of complex multi-source solid wastes, characterized in that: The specific steps include: S1. Collect and sort solid waste from various sources; S2. Pre-treating solid waste to remove impurities and adjust particle size and composition; S3. Conduct detailed chemical composition analysis of solid waste; S4. Optimize the ratio of solid waste to traditional raw materials based on the results of component analysis; S5. Evenly mix the optimized solid waste raw materials with the traditional raw materials; S6. The mixed raw materials are sent to a preheater and preheated to 800-1000°C; S7. The preheated raw materials are sent to the decomposition furnace and decomposed at a high temperature of 1450-1550°C; S8. The decomposed material is sent to a rotary kiln for high temperature calcination, and the high temperature calcined silicate cement clinker is quickly cooled to 100-200°C by a cooler; S9. The cooled clinker is sent to a grinding mill for fine grinding to form cement clinker fine powder that meets the requirements.

2. The process for producing silicate cement clinker under the conditions of coordinated utilization of complex multi-source solid wastes according to claim 1, characterized in that: The solid waste includes industrial waste, urban solid waste and agricultural waste.

3. The process for producing silicate cement clinker under the conditions of coordinated utilization of complex multi-source solid wastes according to claim 1, characterized in that: The pretreatment steps include crushing, screening and magnetic separation.

4. The process for producing silicate cement clinker under the conditions of coordinated utilization of complex multi-source solid wastes according to claim 1, characterized in that: The component analysis includes determining the contents of the main elements silicon, calcium, aluminum and iron in the solid waste.

5. The process for producing silicate cement clinker under the conditions of coordinated utilization of complex multi-source solid wastes according to claim 1, characterized in that: The production process also includes testing the chemical composition and physical properties of the cement clinker finally produced, and making necessary process adjustments based on the test results.