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Method for manufacturing porous sound absorption material by using blast furnace water quenching slag

A blast furnace water quenching slag and porous sound absorption technology, which is applied to the production process of porous sound absorbing materials and the utilization field of blast furnace water quenching slag, can solve the problems of harm to human body, cannot be used alone, low strength, etc., and achieves low production cost, The effect of small investment and simple production process

Inactive Publication Date: 2010-04-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there are also reports on the use of blast furnace slag to produce slag wool, due to its low strength and the extremely fine slag wool is harmful to the human body, it must be packaged and cannot be used alone as a sound-absorbing material. Regarding the use of slag wool as a sound-absorbing material less
There is no report on making porous sound-absorbing materials from blast furnace water-quenched slag particles

Method used

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  • Method for manufacturing porous sound absorption material by using blast furnace water quenching slag
  • Method for manufacturing porous sound absorption material by using blast furnace water quenching slag
  • Method for manufacturing porous sound absorption material by using blast furnace water quenching slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 2kg of blast furnace water quenched slag with a particle size ranging from 0.355mm to 1.0mm; weigh 215g of silica fume powder and mix it evenly with the slag particles; spray 105g of 10% NaOH solution with a watering can and mix evenly, etc. It is soaked for 10 minutes; weighed about 800g, 581g of the mixture, put it into a Φ98mm×h76mm mold, press-formed under a pressure of 2.43MPa, demoulded, and dried at 120℃ for 5h; put it in a high-temperature furnace for sintering , Sintered at 1100℃ for 1h; after cooling, it is a standard sample, and its sound absorption coefficient is tested by standing wave tube method. The basic parameters and sound absorption performance test results of the samples are shown in Table 1, Table 2. The appearance photos of the samples are attached figure 2 Shown.

[0023] Table 1 Basic parameters of the sample in Example 1

[0024] Sample serial number

Mass / g

Diameter / cm

Thickness / cm

Bulk density / g·ml -1

Strength / MPa...

Embodiment 2

[0028] Weigh 1kg of blast furnace water quenched slag with a particle size in the range of 1.0mm~2.0mm, weigh 150g of silica fume powder, and mix it evenly with the slag particles; spray about 60g of NaOH solution with a mass concentration of 10% with a watering can and mix well , Wait for 10 minutes to soak; respectively weigh about 590g and 310g of the mixture, put them into a Φ98mm×h76mm mold, press and mold at a pressure of 2.43MPa, demold, and dry at 120°C for 5h; put in high temperature Sintering in the furnace, sintering at 1100℃ for 1h; after cooling, it is a standard sample, and its sound absorption coefficient is tested by the standing wave tube method. The basic parameters and sound absorption performance test results of the samples are shown in Table 3 and Table 4. The appearance photos of the samples are attached image 3 Shown.

[0029] Table 3 Basic parameters of the sample in Example 1

[0030] Sample serial number

Mass / g

Diameter / cm

Thickness / cm...

Embodiment 3

[0034] Weigh 1kg of blast furnace water-quenched slag with a particle size in the range of 2.0mm~4.0mm; weigh 160g of silica fume powder and mix it with the slag particles evenly; spray about 65g of 10% NaOH solution with a watering can and mix well, etc. Weigh about 470g of the mixture, put it into a mold of Φ98mm×h76mm, press and mold it at a pressure of 2.43MPa, demold, and dry it at 120℃ for 5h; put it in a high-temperature furnace for sintering, Sintered at 1100°C for 1h; after cooling, it becomes a standard sample, and its sound absorption coefficient is measured by the standing wave tube method. The basic parameters and sound absorption performance test results of the samples are shown in Table 5 and Table 6. The appearance photos of the samples are attached Figure 4 Shown.

[0035] Table 5 Example three basic parameters of samples

[0036] Sample serial number

Mass / g

Diameter / cm

Thickness / cm

Bulk density / g·ml -1

Strength / MPa

Sample 4

440

...

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Abstract

The invention discloses a process for manufacturing a porous sound absorption material by using blast furnace water quenching slag. In the method, the porous sound absorption material having a certain strength and excellent sound absorbing performance is manufactured by screening granular blast furnace water quenching slag processed by a water quenching process with a square-mesh sieve according to a certain grain size degree, making a bonding agent from silica powder added with solution of NaOH, performing compression forming at a pressure of 1.5 to 4.0MPa and sintering the formed product at a high temperature of about 1,100 DEG C for 1 to 6 hours. For the sound absorption material manufactured by the process, the sound absorption coefficient is more than 0.70, the first resonance frequency is less than 350Hz, and the strength is more than 4.0MPa. The method provides a new application for the blast furnace water quenching slag and has the advantages of simple manufacturing process, small required investment and low production cost. And the application of the method is expected to create excellent economic and environmental benefits.

Description

Technical field [0001] The invention belongs to the field of environmental materials, and relates to the utilization of blast furnace water quenching slag and the manufacturing process of porous sound-absorbing materials. Background technique [0002] At present, the main ways to use blast furnace water quenching slag at home and abroad are: as building materials, road materials, wastewater treatment adsorbents, agricultural fertilizers, preparation of ceramic products such as glass-ceramics, production of slag wool, preparation of composite materials, extraction of valuable components, etc. . Although there are many ways to use blast furnace slag, they are affected by the requirements of each method of slag size, composition and slag state (crystalline or amorphous), as well as technical problems, market factors or production benefits. Apart from being used as cement clinker, most of the ways of utilization have not been widely promoted. The fundamental reason is that the adde...

Claims

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Application Information

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IPC IPC(8): C04B5/00C04B38/08C21B3/06G10K11/162E04B1/82
CPCC04B2201/50C04B28/08C04B2111/52C04B2111/00017Y02W30/91C04B18/146C04B22/062C04B40/0028C04B40/0071C04B40/0082
Inventor 郭占成贺瑞飞
Owner UNIV OF SCI & TECH BEIJING
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