Title:
PHYSICAL-CHEMICAL COMPLEX RETARDANT FOR CONTROLLING SPONTANEOUS COMBUSTION OF LOW-RANK COAL, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2018/227898
Kind Code:
A1
Abstract:
Provided are a physical-chemical complex retardant for controlling the spontaneous combustion of low-rank coal, a preparation method therefor, and the use thereof. The complex retardant consists of a chelate and attapulgite, wherein the chelate is produced by means of the chelation of procyanidine and calcium chloride. The complex retardant has moisture absorbing and maintaining effects, and is capable of slowing the loss of moisture at low temperatures and producing isolating layers of oxides such as MgO and Al2O3 at high temperatures, wherein the isolating layers have a better stability and can block contact between a coal body and oxygen. Furthermore, the complex retardant can capture hydroxyl free radicals generated during a chain cycle reaction and destroy peroxide free radicals, and can also react with active structures in coal to produce stable structures such as ether linkage and hydrogen bond structures, thereby achieving persistent retardation for low-rank coal.
Inventors:
ZHONG XIAOXING (CN)
WANG FENG (CN)
XIA CHEN (CN)
QIN BOTAO (CN)
WANG FENG (CN)
XIA CHEN (CN)
QIN BOTAO (CN)
Application Number:
PCT/CN2017/114432
Publication Date:
December 20, 2018
Filing Date:
December 04, 2017
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
E21F5/06; A62D1/00
Foreign References:
| CN107035398A | 2017-08-11 | |||
| CN103203089A | 2013-07-17 | |||
| CN102966369A | 2013-03-13 | |||
| CN106753439A | 2017-05-31 | |||
| SU1652616A1 | 1991-05-30 |
Other References:
XIAO, YANG ET AL.: "Progress on Inhibition Mechanism and Application Technology for Coal Spontaneous Combustion", SAFETY AND ENVIRONMENTAL ENGINEERING, vol. 24, no. 1, 31 January 2017 (2017-01-31), pages 176 - 182
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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