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Low-dust unshaped refractory

A refractory material and refractory technology, applied in the field of low-dust amorphous refractory materials, can solve problems such as insecurity

Inactive Publication Date: 2009-04-15
ALLIED MINERAL PRODS TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the allowable exposure limit percentage of traditional quartz sand is far greater than 1000, so it is not safe to wear a respirator when using it

Method used

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  • Low-dust unshaped refractory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Prepare the sample:

[0020] The first group: 5kg blank quartz sand MS1001BO0.8;

[0021] The second group: add 0.1% mineral oil E38 to 5kg of quartz sand, put it into the mixer and mix evenly;

[0022] The third group: add 1.0% mineral oil E38 to 5kg of quartz sand, put it into a mixer and mix evenly.

[0023] 2. Place the sample along the figure 1 The feeding port in the device shown is poured into the beaker, and each group of samples is repeated 10 times, and the dust scattered outside the small beaker is collected and weighed.

[0024] 3. Calculate the dust weight percentage that can be reduced according to the following formula:

[0025] Dust can be reduced by weight % = (weight of dust scattered by blank sample - weight of dust of sample containing mineral oil) / weight of dust scattered by blank sample

[0026] The concentration is directly proportional to the weight, and the weight calculation reflects the concentration.

[0027] Table 1

[0028] ...

Embodiment 2

[0031] The preparation and measurement steps of Example 1 were repeated except that vegetable oil was used instead of mineral oil. Similar to Example 1, the dust concentration can be reduced by at least 70%.

Embodiment 3

[0033] Use the sample prepared in embodiment 1 to carry out following test:

[0034] Table 2

[0035] Product name Dust concentration (mg / m 3 )

[0036] Low dust quartz sand MINRO-SIL LD 0.30

[0037] Ordinary quartz sand MINRO-SIL RAM 1001 3.18

[0038] table 3

[0039] Product name Dust concentration (mg / m 3 )

[0040] Low dust quartz sand MINRO-SIL LD 0.20

[0041] Ordinary quartz sand MINRO-SIL RAM 1001 1.58

[0042] The above results were obtained during the actual installation of low-dust quartz sand and ordinary quartz sand using standard air sample testing techniques. Sampling is carried out in two modes: manual collection and fixed monitor on the electric furnace deck. Through the above results, it can be proved that the respirable dust concentration reduced by low-dust quartz sand is 91% and 87%, respectively, both of which are above 80%.

[0043] Although the dust test results clearly prove that the dust concentration of low-dust quartz sand is very low, b...

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Abstract

The invention relates to a low-dust unshaped refractory, which comprises 0.1-1.0 wt percent of oil substances chosen from mineral oil, vegetable oil, synthetic oil, fluid wax or biodegradable petroleum to be used as the binder and combined materials calculated by the total weight of the refractory. The unshaped refractory is characterized by reducing dust in the carrying and instillation process. The unshaped refractory not only comprises spray coating, but also comprises compact and insulating refractory castables and dry materials. The low-dust unshaped refractory can reduce the dust suction quantity of the personnel exposed to the construction field by at least 70 percent, reduce the pollution to the environment and improve the life of the respirators used by the personnel.

Description

technical field [0001] The invention relates to a low-dust amorphous refractory material, which contains 0.1-1.0% by weight of oily substances and composite materials selected from mineral oil, vegetable oil, synthetic oil, liquid paraffin or biodegradable petroleum, and the refractory material Total weight meter. The unshaped refractory materials referred to here include not only spray coatings, but also dense and heat-insulating castables and dry vibration materials. Background technique [0002] All refractory materials contain varying amounts of hazardous respirable quartz sand components. During installation, the respirable quartz sand produced will float in the air and cause lung damage if inhaled. The dust produced will also contain components that pollute the environment. The applicant of the present invention has confirmed through the present invention that compared with traditional products, the product of the present invention can reduce the amount of inhalable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor J·E·多伊格D·K·多扎D·G·戈斯基
Owner ALLIED MINERAL PRODS TIANJIN
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