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A modification and raw material technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as easy pulverization and bursting, and achieve the effects of convenient operation, high selectivity, and scientific and simple process
Inactive Publication Date: 2012-05-09
DALIAN UNIV OF TECH +1
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Problems solved by technology
[0003] The invention provides a method for modifying brick-making materials, which solves the problem that the existing brick-making materials are easy to pulverize and burst, and at the same time realizes the full utilization of raw materials
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Embodiment 1
[0018] Modification of high calcium gangue brick material:
[0019] Taking coal gangue from Inner Mongolia as an example, its inorganic composition is shown in Table 1 through X-ray fluorescence spectrometer (SRS3400, Germany), and only the content of CaO exceeds the standard (4.98%).
[0020]
[0021] Table 1. Inorganic components of coal gangue (weight percent)
[0022] components content(%) components content(%) SiO 2 62.8 P 2 o 5 0.162 Al 2 o 3 17.0 BaO 0.146 Fe 2 o 3 4.25 Cl 0.108 MgO 1.54 ZrO 2 0.0514 K 2 o 5.76 ZnO 0.0213 CaO 4.98 SrO 0.0590 Na 2 o 1.90 NiO 0.0331 TiO 2 0.722 MnO 0.0953 SO 3 0.292 C o o 0.0113
[0023] The modification method is as follows:
[0024] Take 200mL of acetic acid HAC mass fraction of 8.03% dark brown waste water solution wood vinegar in a beaker, gradually add 360g of coal gangue at room temperature, the particle size is 0.05...
Embodiment 2
[0028] Modification of high calcium and high magnesium fly ash brick materials:
[0029] Taking the fly ash of a certain factory as an example, its inorganic composition is shown in Table 3 by X-ray fluorescence spectrometer (SRS3400, Germany). The contents of CaO and MgO used as brick-making materials exceed the standard, respectively 14.89% and 4.63%.
[0030] Table 3. Inorganic components of fly ash (weight percent)
[0031] components content(%) components content(%) SiO 2 53.17 CaO 14.89 Al 2 o 3 18.18 MgO 4.63 Fe 2 o 3 6.16 K 2 o 1.27 SO 3 0.55 other 1.15
[0032] The modification method is as follows:
[0033] Take 200mL of wood vinegar, a dark brown wastewater solution with an acetic acid HAC mass fraction of 8.20%, in a beaker, gradually add 263.0g of fly ash (particle size: 0.1-0.2mm) at room temperature, stir the reaction with a high-speed dispersing homogenizer, and observe the pH After 2.5 hours, t...
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Abstract
The invention discloses a modification method of a brick-making material. the method provided by the invention is characterized by comprising the following steps of: adding a modification treatment fluid into the brick-making raw material, carrying out high-speed dispersion, stirring, reacting, waiting or adjusting pH value to a stable range, followed by pumping filtration to obtain a solid product A and a liquid product B; drying the solid product A to obtain the modified brick-making material; heating and concentrating the liquid product B, refining, filtering and drying to obtain a by-product snow-melting agent. By the adoption of the modification method of the brick-making material, on one hand, the brick-making material containing calcium and magnesium, the content of which does not exceed standard, can be obtained; on the other hand, the calcium magnesium acetate environment-friendly snow-melting agent can be obtained. Thus, no corrosion, low energy consumption, high selectivityand high value can be realized. The modification method is a novel low-cost method of treating waste with waste. In the meantime, the modification method of the brick-making material has scientific and simple flows, is convenient to operate and is easy to realize large-scale production.
Description
technical field [0001] The invention relates to a method for modifying brick-making materials, in particular to a method for modifying brick-making materials such as coal gangue, fly ash and shale ash with excessive calcium or magnesium content by using biomass pyrolysis waste liquid . Background technique [0002] In order to protect land resources in our country, solid clay bricks occupy a large amount of fertile land and have been banned from production and use. However, a large amount of waste slag produced in the development of mineral resources, such as coal gangue, shale ash, fly ash, etc., can be used as brick-making materials to make non-clay bricks, which are new building materials encouraged by the state and solve the pollution problem of waste slag. At present, it has been widely used in the domestic building materials market. However, in recent years, "powder brick tofu slag engineering problems" have emerged one after another. Large-scale bursting and pulveri...
Claims
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