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Method for preparing non-fired and non-steamed bricks by using sintering dry desulphurization byproduct

A technology of non-burning, non-steaming bricks and desulfurization by-products is applied in the field of comprehensive utilization of resources, which can solve the problems of few desulfurization by-products and comprehensive utilization problems, and achieve the effects of improving early mechanical properties, improving mechanical properties, and product energy saving and environmental protection.

Active Publication Date: 2010-03-17
SHOUGANG CORPORATION
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Problems solved by technology

[0005] The above-mentioned patented technologies have made some breakthroughs in the field of comprehensive utilization of desulfurization by-products, but the research objects are limited to by-products of sintering flue gas desulfurization in power plants, and do not involve by-products of dry desulfurization of sintering flue gas in iron and steel enterpris

Method used

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  • Method for preparing non-fired and non-steamed bricks by using sintering dry desulphurization byproduct
  • Method for preparing non-fired and non-steamed bricks by using sintering dry desulphurization byproduct

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Example Embodiment

[0029] Example 1:

[0030] Refer to the national standard "Test Methods for Wall Bricks" GB / T2542-92 for experiment and performance testing.

[0031] The desulfurization by-product is mixed with water to prepare a mixture with a concentration of 60%, and air is blown into it to mix and stir, and the stirring time is 20 minutes. The mud cake after the mixture is filtered by a filter press is naturally dried in the air to a moisture content of 20%.

[0032] The steel slag after the stewing slag treatment is piled up for another 180 days, and it is sieved to take 3mm~10mm granular materials.

[0033] The materials are measured and mixed according to the material structure shown in Table 1, after stirring for 5 minutes, they are fed into the brick making machine and molded by mechanical compression, and cured under natural conditions for 28 days to obtain the finished double-free bricks.

[0034] Table 1 The influence of desulfurization by-product content on the mechanical properties of no...

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Abstract

A method for preparing non-fired and non-steamed bricks by using sintering a dry desulphurization byproduct belongs to the field of resources comprehensive utilization. The method comprises the stepsof mixing the desulphurization byproduct with water to prepare a mixed material with a concentration ranging from 10% to 80%, stirring uniformly, and airing naturally a filter cake after filtering themixed material so that the water content becomes 10% to 30%; re-stacking the stewed steel slag for 170 days to 200 days; sieving the steel slag in a sieve with the size of 10mm, and taking out the minus sieve for sieving in another sieve with the size of 3mm, and then taking out the plus sieve; dosing based on the proportion of raw materials; and after stirring uniformly by a stirrer, feeding thestirred product into a brick machine to be pressed by the machine, and naturally curing in air for 28 days to obtain a finished product. The method has the advantages that the process route of non-firing and non-steaming is adopted to prepare energy-saving bricks, therefore, the products are energy saving and environment friendly with lower cost and the energy-saving bricks are no longer crackedin use.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of resources, and in particular relates to a method for preparing non-burning and non-steaming energy-saving bricks by using by-products of sintering dry desulfurization. Background technique [0002] Steel companies are SO 2 Large emitter, while the SO emitted from the sintering process 2 Accounted for approximately the SO of the entire iron and steel enterprise 2 90% of the total emissions. At present, there are dozens of mature sintering flue gas desulfurization processes at home and abroad, but due to the low investment, small footprint, low water consumption and simple process of the dry sintering desulfurization process, it has overcome some of the existing problems of the wet desulfurization process. Problems and deficiencies have gradually become the mainstream process for sintering desulfurization in iron and steel enterprises. However, the by-products of sintering dry semi-dr...

Claims

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Application Information

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IPC IPC(8): E04C1/00B28C7/04B28B3/00C01F11/02C01F11/46C04B28/00C04B18/14
CPCY02W30/91
Inventor 冯向鹏廖洪强李冀闽冯仕章李世青余广炜
Owner SHOUGANG CORPORATION
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