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Materialized synergistic coal inhibitor and preparation method thereof

A chemical inhibitor and coal technology, applied in mining equipment, earthwork drilling, safety devices, etc., can solve the problems of gas emission hazards, low resistance efficiency, incomplete resistance, etc., to prevent heat transfer and spontaneous combustion tendency The effect of reducing and obtaining materials is convenient and economical

Inactive Publication Date: 2018-11-23
FOSHAN LINGXIE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: In view of the problems that some coalfield fire areas often choose unsuitable inhibitors randomly, resulting in low inhibition efficiency, high cost, incomplete inhibition, gas release that endangers the health of underground personnel, and corrodes equipment. Provide A physical and chemical synergistic coal inhibitor and its preparation method

Method used

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  • Materialized synergistic coal inhibitor and preparation method thereof

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example 1

[0022] Get 13.6g of zinc chloride, 19.0g of magnesium chloride, 13.3g of aluminum chloride, add 2L of deionized water, stir at 300r / min for 30min, then add 1.0g of lanthanum chloride, and use a mass fraction of 10% sodium carbonate solution to adjust the pH to 10. Stir at 500r / min for 1 hour, put it into a hydrothermal reaction kettle, keep it warm at 70°C for 15 hours, cool to room temperature and filter to get the filter residue, wash the filter residue with deionized water until the washing liquid is neutral, then place the filter residue in In a drying oven, dry at 70°C to constant weight to obtain rare earth hydrotalcites. Take 20g of rare earth hydrotalcites, add them to 300mL of deionized water, disperse them with 300W ultrasonic waves for 20min, then add 2g of antioxidant 1010, 1g of anti-oxidant Oxygen agent 168, stirred at 300r / min for 20min, then evaporated to dryness under reduced pressure, then transferred to a mortar for grinding, passed through a 60-mesh sieve to...

example 2

[0024] Get 20.4g zinc chloride, 28.6g magnesium chloride, 20.0g aluminum chloride, add 3L deionized water, stir with 400r / min for 35min, then add 1.5g lanthanum chloride, and use the mass fraction as 10% sodium carbonate solution to adjust the pH to 10. Stir at 500r / min for 1 hour, put it into a hydrothermal reaction kettle, keep it warm at 75°C for 18 hours, cool to room temperature and filter to get the filter residue, wash the filter residue with deionized water until the washing liquid is neutral, and then place the filter residue in In a drying oven, dry at 75°C to constant weight to obtain rare earth hydrotalcites. Take 25g of rare earth hydrotalcites, add them to 300mL of deionized water, disperse them with 300W ultrasonic waves for 25min, then add 2g of antioxidant 1010, 1g of anti-oxidant Oxygen agent 168, stirred at 300r / min for 25min, then evaporated to dryness under reduced pressure, then transferred to a mortar for grinding, passed through a 60-mesh sieve to obtain...

example 3

[0026] Get 20.4g zinc chloride, 28.6g magnesium chloride, 20.0g aluminum chloride, add 3L deionized water, stir 40min with 400r / min, then add 2.5g lanthanum chloride, and use mass fraction as 10% sodium carbonate solution to adjust the pH to 11. Stir at 600r / min for 2h, put it into a hydrothermal reaction kettle, keep it warm at 80°C for 20h, cool to room temperature and filter to get the filter residue, wash the filter residue with deionized water until the washing liquid is neutral, and then place the filter residue in In a drying oven, dry at 80°C to constant weight to obtain rare earth hydrotalcites. Take 30g of rare earth hydrotalcites, add them to 400mL of deionized water, disperse them with 300W ultrasonic waves for 30min, then add 3g of antioxidant 1010, 2g of anti-oxidant Oxygen agent 168, stirred at 400r / min for 30min, evaporated to dryness under reduced pressure, then transferred to a mortar and ground, passed through a 60-mesh sieve to obtain oxygen barrier powder, ...

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Abstract

The invention relates to a materialized synergistic coal inhibitor and a preparation method thereof and belongs to the technical field of mines. A sodium polyacrylate salt is used in a water absorbingswelling effect of super absorbent resin, and the physical inhibitor is obtained under the combined action of aqueous resin colloid and rare earth hydrotalcite; due to the high water content and thehigh water retaining performance, the physical inhibitor has the functions of heat absorption and temperature lowering and the effects of blocking oxygen and preventing heat transfer, and suppressionof a coal oxygen reaction is facilitated. At the same time, the affinity of the rare earth hydrotalcite and oxygen is higher than that of magnesium and oxygen, in the process of oxidation and temperature raising, the rare earth hydrotalcite reacts with oxygen and magnesium oxide to generate rare earth oxides and reduce magnesium, and a small amount of aluminum also reacts with oxygen to generate aluminum oxide, so that the density of a barrier layer is increased, the flame retardancy of hydrotalcite-like compounds to polymers is greatly improved, and reduced magnesium, graphite powder and copper powder together constitute a short-circuited corrosion micro-battery for increasing the oxygen absorption rate and synergizing with an antioxidant to capture active radical groups and block a chainoxidation reaction.

Description

technical field [0001] The invention relates to a physicochemical synergistic coal inhibitor and a preparation method thereof, belonging to the technical field of mines. Background technique [0002] Mine fire is an important manifestation of coal oxidation and spontaneous combustion. It is the most hidden and difficult to control among all coal mine accidents. The toxic and harmful gases produced at the same time have caused serious pollution to the environment and pose a great threat to coal mine safety. It may even cause secondary disasters such as gas or coal dust explosions. According to relevant statistics, the loss of coal due to natural fires is huge every year, and the overlying strata above the coal seam are metamorphosed due to combustion, and various problems such as surface subsidence, groundwater damage, and soil erosion are secondary to them. It has caused more serious damage to the ecological environment, thus triggering secondary disasters. At the same tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/06
CPCE21F5/06
Inventor 胡丽春张桂芳朱华
Owner FOSHAN LINGXIE ENVIRONMENTAL PROTECTION TECH CO LTD
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