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Method for comprehensive utilization of waste gases and waste residues

A waste residue and waste gas technology, applied in cement production and other directions, can solve problems such as ineffective utilization and environmental problems, achieve good economic and environmental protection benefits, reduce production costs and use costs, and achieve remarkable effects.

Active Publication Date: 2017-02-15
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solid wastes such as silicon-calcium slag, waste incineration bottom slag, and steel slag contain some impurities, such as Na 2 O, Fe, Ca(OH) 2 , Mg(OH) 2 , heavy metals, etc., and cannot be effectively utilized, thus bringing greater challenges to this production method, which may produce an equivalent amount of another solid waste after consuming one solid waste, and cause environmental problems from other perspectives

Method used

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  • Method for comprehensive utilization of waste gases and waste residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Table 1 is the ratio table of raw materials in this embodiment. The raw materials are weighed according to Table 1, and then the silicon-calcium slag (A), waste limestone (B) and slag (C) are crushed, ground, batched, mixed, and homogenized and other processes, similar to the Portland cement raw meal preparation process, the fineness of the mixed material is controlled to be 80 μm and the sieve residue is less than 5%, the Ca / Si molar ratio is controlled to be 2.0, and it is calcined at a low temperature at a temperature of 1150 ° C. 60min, and then rapidly cooled to obtain the active material, which was lowered to below 100°C in 30 minutes; the active material was mixed with water, the proportions were 90% and 10%, and vibration molding was made into a 100mm×100mm×100mm block, and then the first-stage high-efficiency gas Fully participate in the reaction in the absorption reaction tower, the temperature is 100-150°C, CO 2 Concentration 35%, SO 2 Concentration 0.002%, ...

Embodiment 2

[0041]Table 2 is the raw material ratio table of this embodiment. Weigh the raw materials according to Table 2, and then pass steel slag (A), fly ash (B) and calcium silicate slag (C) through a process similar to the preparation process of Portland cement raw meal , crushing, grinding, batching, mixing, homogenization and other processes, the fineness of the mixed material is controlled to be 80 μm and the sieve residue is less than 5%, the Ca / Si molar ratio is controlled to be 1.0, and it is calcined at a low temperature at a temperature of 1250 ° C. for 30 minutes, and then rapidly cooled to obtain the active material, which was lowered to below 100°C in 30 minutes; the active material was mixed with water and sand at a ratio of 45%, 10% and 45% respectively, and vibrated to form a 240mm×115mm×53mm brick, and then in Fully participate in the reaction in the first-stage high-efficiency gas absorption reaction tower, the temperature is 100-150°C, CO 2 Concentration 35%, SO 2 ...

Embodiment 3

[0045] Waste incineration bottom slag (A), steel slag (B) and high-calcium fly ash (C) are processed through crushing, grinding, batching, mixing, homogenization, etc., similar to the preparation process of Portland cement raw meal, and the mixture is controlled The fineness of the material is 80 μm, the sieve residue is less than 5%, the Ca / Si molar ratio is controlled to be 2.5, and it is calcined at a low temperature, the calcination temperature is 1250°C, and the calcination time is 60 minutes, and then the active material is obtained by rapid cooling, which is reduced to below 100°C in 30 minutes Active substances, water, sand and stone are mixed in proportions of 17%, 8%, 67% and 8% respectively, vibrated and formed into 100mm×100mm×10mm plates, and then fully participated in the first-level high-efficiency gas absorption reaction tower Reaction, temperature 250-300°C, CO 2 Concentration 35%, SO 2 Concentration 0.002%, humidity 9%. After 4 hours of full reaction, the f...

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Abstract

The invention discloses a method for comprehensive utilization of waste gases and waste residues. The method comprises the following steps: calcining the waste residues containing at least one of elements of Ca, Si, Mg, Na, K, Al, Fe, S and P, wherein the calcination temperature is 1000 to 1350 DEG C, and the calcination time is 15 to 120min, cooling to room temperature to obtain active substances; mixing the active substances with water, sand and stone in a mass ratio of 1: (0.08-0.5): (0-4): (0-3), pressing or vibrating to be prepared into prefabricated parts; making the prefabricated parts react with the industrial waste gases to complete the comprehensive utilization of the waste gases and waste residues, wherein the industrial waste gases contain CO2 and SO2, and the reaction temperature is 20 to 400 DEG C; the concentration of CO2 is more than 10%; the concentration of SO2 is more than 0.002%; the humidity is 9 to 50%; the reaction time is 0.15 to 12h. By adopting the method disclosed by the invention, the comprehensive utilization of the waste gases and waste residues is realized, so that the pollution is reduced, and the commercial value is realized.

Description

technical field [0001] The invention relates to the field of waste utilization, in particular to a method for comprehensive utilization of waste gas and waste residue. Background technique [0002] In recent years, with the development of industry and the increasing global calls for energy conservation and emission reduction, traditional industrial production consumes a lot of resources and energy, and produces a large amount of emissions, such as CO 2 , SO 2 and so on, and face great challenges. Statistics show that the energy consumption of the cement industry in the building materials industry accounts for about 2% of the global primary energy consumption, or nearly 5% of the global industrial energy consumption; its CO 2 Emissions account for 5% of the total global CO2 emissions. The purification and reuse of industrial exhaust gas is an inevitable choice for future global economic development. [0003] At present, the rapid development of domestic industry has led t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/147C04B7/24C04B28/02C04B40/02
CPCC04B7/147C04B7/24C04B7/26C04B28/02C04B40/0231C04B2201/52C04B14/06C04B14/02Y02P40/10
Inventor 刘姚君汪澜
Owner CHINA BUILDING MATERIALS ACAD
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