Process for producing building cement by domestic refuse incinerated slag

A technology of waste incineration and masonry cement, which is applied in the field of cement production, can solve the problems of secondary pollution of slag, etc., and achieve the effect of alleviating economic pressure, enhancing the curing effect, and reducing the expenditure of treatment costs

Inactive Publication Date: 2007-08-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slag content reaches more than 15%, the product performance meets the national standard requirements of masonry cement GB / T 3183-2003, and the heavy metal leaching toxicity of the product is tested according to the method specified in GB 5085.3-1996 to meet the environmental quality of GB 3838-2002 surface water class V The high requirements of the standard turn harm into benefit and effectively solve the problem of secondary pollution of slag

Method used

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  • Process for producing building cement by domestic refuse incinerated slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Select slag from Shanghai Jiangqiao Waste Incineration Power Plant, Portland cement clinker produced by Guangzhou Zhujiang Cement Co., Ltd., granulated blast furnace slag and natural dihydrate gypsum produced by Guangdong Shaoguan Iron and Steel Plant, and dry exhaust III from Zhujiang Power Plant grade fly ash, and metakaolin. The above materials are ground separately, and the specific surface area of ​​the slag is controlled to be 350m 2 / kg, the specific surface area of ​​clinker is 370m 2 / kg, the specific surface area of ​​slag is 400m 2 / kg, the specific surface area of ​​gypsum is 390m 2 / kg, the specific surface area of ​​fly ash is 310m 2 / kg, the specific surface area of ​​metakaolin is 390m 2 / kg. Mix according to the ratio in Table 1 (the 0.08mm sieve after mixing is 1% to 3%), the physical properties of the prepared masonry cement are shown in Table 2, and the heavy metal leaching of the product is shown in Table 7.

[0031] Table 1. Formula (%) of 1~...

Embodiment 2

[0037] Slag from Shanghai Jiangqiao Waste Incineration Power Plant, silicate clinker produced by Hengdali Cement Plant in Guangdong Province, granulated blast furnace slag from Liuzhou Iron and Steel Plant in Guangxi Province, natural gypsum, and Class II pulverized coal from Huangpu Power Plant in Guangzhou were selected. Ash and metakaolin are ground together according to the formula in Table 3 to obtain a specific surface area of ​​320-330m 2 / kg (0.08mm sieve residue is 4% to 6%) of masonry cement. Its physical properties are shown in Table 4, and the leaching toxicity of some samples of heavy metals is shown in Table 7.

[0038] Formulation (%) of Table 3, 6~10# samples

[0039] sample number

[0040] Table 4. Physical properties of 6~10# masonry cement samples

[0041]

[0042] The dissolution of heavy metals in some samples is shown in Table 7. It can be seen from Table 3~Table 4 and Table 7 that when the amount of waste incinerator slag reaches 4...

Embodiment 3

[0044] Slag from Likeng Waste Incineration Power Plant in Guangzhou, silicate clinker produced by the new dry process kiln of Tapai Group in Guangdong Province, granulated blast furnace slag from Shaofeng Iron and Steel Plant in Hunan, natural gypsum in Hunan, and Huangpu Power Plant III in Guangzhou were selected. Grade fly ash, limestone produced in Yingde, Guangdong Province, is ground together according to the formula in Table 5 until the specific surface area is 350-360m 2 / kg (0.08mm sieve residue is controlled at 2% to 3%). The physical properties of the prepared masonry cement are shown in Table 6, and the leaching toxicity of some samples of heavy metals is shown in Table 7.

[0045] Table 5, 11~15# sample formula (%)

[0046] Sample serial number

[0047] Table 6. Physical properties of 11~15# masonry cement samples

[0048]

[0049] Table 7, 1 ~ 6 and 10, 14, 15 # samples of heavy metal dissolution (μg / L)

[0050] It can be seen from Table 5~...

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Abstract

A process for preparing the masonry cement from the cinder of life garbage includes such steps as proportionally mixing said cinder with silicate clinker, slag and gypsum, and grinding.

Description

technical field [0001] The invention relates to cement production, in particular to a method for producing masonry cement by utilizing waste incineration power plant slag. Background technique [0002] Domestic waste incineration power generation is one of the main ways to deal with domestic waste in developed areas at home and abroad. Incineration slag is a by-product of municipal solid waste incineration power plants, including incineration residues remaining on the grate and particulate matter falling from between the grates. Incineration slag contains a certain amount of heavy metals such as Cd, Hg, Pd, As, Cr, Se, Zn and more alkali metal ions (K + 、Na + ) and chloride ions. If left untreated, the above-mentioned heavy metals will dissolve quickly and in a large amount under acidic conditions (such as acid rain PH=4-6), often exceeding the standard of my country's heavy metal leaching toxicity GB 5085.3-1996, causing harm to the environment. If landfill treatment or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/345C04B7/36
Inventor 吴笑梅樊粤明陈东河
Owner SOUTH CHINA UNIV OF TECH
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