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Method for activating waste rock wool and application of activated waste rock wool

An activation method and technology for rock wool are applied in the activation of waste rock wool and the application field of activated waste rock wool, which can solve the problems of low glass body content of waste rock wool, adverse effects on material properties, weak pozzolanic reaction ability, etc., and achieve energy saving. consumption, achieve harmless treatment, and improve the effect of activity

Active Publication Date: 2021-11-02
CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the research, waste rock wool itself has less vitreous content, and the pozzolan reaction ability is usually weak, which may affect the gelation of the produced material and adversely affect the material performance.

Method used

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  • Method for activating waste rock wool and application of activated waste rock wool
  • Method for activating waste rock wool and application of activated waste rock wool
  • Method for activating waste rock wool and application of activated waste rock wool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of activation method of waste rock wool that embodiment 1 provides, comprises the following steps:

[0043] (1) 3 kg of chlorinated salt anhydrous CaCl with a purity of 95% 2 Put it into a graphite reaction vessel with a diameter of 20 cm, and heat it to CaCl in an electric furnace under the protection of an inert gas. 2 Melt, then adjust the molten salt temperature to 820°C;

[0044] (2) Cut the waste rock wool board into pieces, take a piece of 8*8*2cm, and fix it on one end of the iron wire. Then, under an inert atmosphere, one end of the iron wire loaded with rock wool was immersed in molten CaCl 2 During the process, ensure that the rock wool waste is completely submerged in the molten salt for 7 hours;

[0045] (3) After the soaking operation is finished, the waste rock wool is taken out from the molten salt, and the molten salt adsorbed inside the waste rock wool is drained by plate pressing under an inert atmosphere;

[0046] (4) In a dry environment,...

Embodiment 2

[0051] Example 2 provides an application of activated waste rock wool. Specifically, the activated waste rock wool prepared in Example 1 is prepared with Portland cement clinker and fly ash at a ratio of 1:3.5:0.5 to obtain a composite Cementitious material; the obtained composite cementitious material is mixed with municipal sludge in a certain place and cured.

[0052] see Figure 4 as shown, Figure 4 It is the change of water content after the composite cementitious material obtained in Example 2 is mixed with municipal sludge in a certain place and cured. It can be seen from the figure that the sludge is increased with the number of maintenance days after adding the cementitious material prepared by the method of the present invention. , and its moisture content is significantly reduced. It shows that the cementitious material prepared after activation treatment of waste rock wool is used for sludge solidification treatment, and the effect of water reduction and solidif...

Embodiment 3

[0054] A kind of activation method of waste rock wool provided by embodiment 3, compared with embodiment 1, the difference is that in step (1), the chloride salt used is anhydrous NaCl-CaCl 2 , and others are substantially the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a method for activating waste rock wool and application of activated waste rock wool. Wherein the waste rock wool is activated in the mode that the waste rock wool is immersed in high-temperature chlorate molten salt, so that the content of active silicon oxide and aluminum oxide in the waste rock wool is increased, and organic matter in the waste rock wool is removed; meanwhile, the silicon oxide component in the waste rock wool can react with the fused chlorate to generate silicate with high pozzolanic activity. The activated waste rock wool prepared by the method has the characteristic of high pozzolanic activity, can be used as a cementing material admixture for preparing a cementing material, and is used for sludge solidification treatment. The waste rock wool treatment method provided by the invention is short in flow and simple in technological process, and does not cause pollution to the environment; fused salt can be repeatedly used, so that the cost is reduced; in addition, the cementing material prepared from the activated waste rock wool is used for sludge solidification treatment, the utilization rate of resources is increased, the sludge treatment cost is reduced, and industrial application potential is achieved.

Description

technical field [0001] The invention relates to the technical field of waste rock wool treatment, in particular to a method for activating waste rock wool and the application of activated waste rock wool. Background technique [0002] Insulation cotton materials are widely used in metallurgy, petrochemical, ceramics, housing construction and other fields, and can be seen everywhere in daily life, and their extensive use means that a large amount of waste will be formed. For example, steel, petrochemical and other heavy industry enterprises need to regularly replace the insulation cotton outside the equipment or pipelines, which will generate a large amount of waste insulation cotton every year. At present, the most common thermal insulation wool on the market is mainly rock wool and glass wool, especially rock wool is more widely used. These materials have a high melting point, good stability, cannot be decomposed quickly, and will have a negative impact on the environment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/24C04B28/00
CPCC04B7/26C04B7/24C04B7/246C04B28/00C04B2111/00017C04B18/0418Y02P40/10Y02W30/91
Inventor 闵红平蒋睿霍培书郭二卫湛德汤丁丁赵皇王鑫
Owner CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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