Case studies of porous ammonium nitrate application for production of emulsion explosives at Kovdorskiy GOK

2018 ◽  
Vol 142 (6/2018) ◽  
pp. 52-54
Author(s):  
F.I. Galushko
Keyword(s):  
Ammonium Nitrate ◽  
Case Studies ◽  
Emulsion Explosives

Thermal Decomposition Conditions of Emulsion Matrix in the Emulsifier

2014 ◽  
Vol 1082 ◽  
pp. 387-390
Author(s):  
Hui Sheng Zhou ◽  
Xing Hua Xie ◽  
Kang Xu
Keyword(s):  
Thermal Decomposition ◽  
Ammonium Nitrate ◽  
Hot Spots ◽  
Hot Spot ◽  
Decomposition Mechanism ◽  
Heat Accumulation ◽  
Emulsion Explosives ◽  
Starting Point ◽  
Emulsion Matrix

The main background was the "3.11" accident in this paper. The starting point was based on the experts’ conclusions of investigation and analysis in the accident. Combining the decomposition mechanism of ammonium nitrate in the emulsion explosives and the lessons from the production of emulsion explosives explosion, the conditions of the emulsion explosives (matrix) thermal decomposition in the emulsifier are given that are the formation of hot spot and the accumulation of heat. Then the factors of hot spots generated in the production of emulsion explosives and the occurred conditions of the heat accumulation are analyzed and summarized.

Improvement of the Thermocouple Method for Testing Energy-Intensive Emulsions for Compatibility with the Sulfide Ores

2021 ◽  
pp. 58-63
Author(s):  
N.I. Akinin ◽  
◽  
A.S. Garmashov ◽  
V.V. Rudomazin ◽  
◽  
...  
Keyword(s):  
Ammonium Nitrate ◽  
Testing Temperature ◽  
Point Of View ◽  
Spontaneous Ignition ◽  
Sulfide Ores ◽  
Chemical Compatibility ◽  
Emulsion Explosives ◽  
Safety Testing ◽  
Sulphide Ores ◽  
Thermocouple Method

The results are presented concerning improving the thermostatic method for studying the chemical compatibility of modern industrial emulsion explosives based on the ammonium nitrate with surrounding materials, the increased reactivity of which can lead to spontaneous ignition and even explosion. An assessment of the compatibility of emulsion explosives with sulphide ores was conducted using an original thermocouple methodology developed at the D. Mendeleyev University of Chemical Technology of Russia, fixation of the thermal effects of the interaction of shell-free explosives based on the ammonium nitrate with sulfide minerals. Improved thermocouple method allows to determine chemical compatibility of the industrial explosives with the reactive rocks. It is distinguished by the possibility of continuous recording of the thermocouple measurements during tests using an oscilloscope and combines the reliability of the results with small laboratory weights of the test samples (no more than 20 g, which ensures safety testing). Temperature measurement accuracy is ± 2 °С. It is concluded that the method used is able to identify the cases of the most dangerous interaction from the practice point of view using the emulsion explosives when the pyrite content in the ore exceeds 85 %. The results of experiments on the applicability of thermocouple measurements to testing low-activity rocks, highly reactive pyrite ores, mixed sulfide ores of medium activity, as well as on the identification of the main regularities of heat release during the interaction of emulsion explosives with the sulfide ores are considered.

Enlightment of “May 20” Explosion Accident

2014 ◽  
Vol 1082 ◽  
pp. 391-394 ◽  
Author(s):  
Xing Hua Xie ◽  
Lei Wang ◽  
Hui Sheng Zhou
Keyword(s):  
Thermal Decomposition ◽  
Production Process ◽  
Ammonium Nitrate ◽  
Hot Spots ◽  
Hot Spot ◽  
Decomposition Mechanism ◽  
Heat Accumulation ◽  
Emulsion Explosive ◽  
Emulsion Explosives

This paper introduces the "5.20" of the emulsion explosive incident and analysis the cause of the accident. Based on the production of explosion accident summarizes the security problems of emulsion explosive production process, and relevant measures are put forward. Combining the decomposition mechanism of ammonium nitrate in the emulsion explosives and the lessons from the production of emulsion explosives explosion, the conditions of the emulsion explosives (matrix) thermal decomposition in the emulsifier are given that are the formation of hot spot and the accumulation of heat. Then the factors of hot spots generated in the production of emulsion explosives and the occurred conditions of the heat accumulation are analyzed and summarized.

Deflagration to Detonation Transition of Explosives without the Effects of Shock Waves

2014 ◽  
Vol 1082 ◽  
pp. 399-402
Author(s):  
Xing Hua Xie ◽  
Kang Xu ◽  
Hui Sheng Zhou
Keyword(s):  
Thermal Decomposition ◽  
Shock Waves ◽  
Ammonium Nitrate ◽  
Hot Spot ◽  
Storage Process ◽  
Heat Accumulation ◽  
Emulsion Explosives ◽  
Deflagration To Detonation Transition ◽  
Detonation Transition ◽  
And Storage

Inthis paper, the deflagration to detonation transition in explosives without theeffects of detonators was studied by the analyzing the accident in theproduction and storage process of explosives. Combining the decompositionmechanism of ammonium nitrate in the emulsion explosives and the lessons fromthe production of emulsion explosives explosion, the conditions of the emulsionexplosives (matrix) thermal decomposition in the emulsifier are given that arethe formation of hot spot and the accumulation of heat. Then the factors of hotspots generated in the production of emulsion explosives and the occurredconditions of the heat accumulation are analyzed and summarized.

Emulsion Explosives Containing Catalytic Metal Ion

2014 ◽  
Vol 1082 ◽  
pp. 22-25
Author(s):  
Xing Hua Xie ◽  
Kang Xu ◽  
Hui Sheng Zhou
Keyword(s):  
Ammonium Nitrate ◽  
Metal Ion ◽  
Aqueous System ◽  
Production Equipment ◽  
Disaster Prevention ◽  
Property Damage ◽  
Emulsion Explosives ◽  
Production Safety ◽  
Catalytic Metal ◽  
Explosion Mechanism

Compatibility and safetysystems research and production equipment and technology of explosives betweenitself, the establishment and development of the explosion mechanism ofexplosive accidents and prevent the occurrence of accidental explosion ofexplosives to achieve disaster prevention and reduction, to ensure the safetyof personnel and minimize property damage. Explosives production of metals andalloys commonly used in the device in an aqueous system, the compatibility ofthe ammonium nitrate, especially at higher temperatures and a variety ofelements from the synergy of explosives, etc. to accelerate the reactionconditions, to select a material with good compatibility, the nature of theexplosive increase in production safety, to solve the production of explosivesexplosion problem

Corporate Sustainability: Challenge to Managerial Orthodoxies

2003 ◽  
Vol 9 (1) ◽  
pp. 2-11 ◽  
Author(s):  
Dexter Dunphy
Keyword(s):  
Case Studies ◽  
Corporate Sustainability ◽  
Central Place ◽  
Marked Contrast ◽  
Sustainability Management

ABSTRACTThis paper addresses the issue of corporate sustainability. It examines why achieving sustainability is becoming an increasingly vital issue for society and organisations, defines sustainability and then outlines a set of phases through which organisations can move to achieve increasing levels of sustainability. Case studies are presented of organisations at various phases indicating the benefits, for the organisation and its stakeholders, which can be made at each phase. Finally the paper argues that there is a marked contrast between the two competing philosophies of neo-conservatism (economic rationalism) and the emerging philosophy of sustainability. Management schools have been strongly influenced by economic rationalism, which underpins the traditional orthodoxies presented in such schools. Sustainability represents an urgent challenge for management schools to rethink these traditional orthodoxies and give sustainability a central place in the curriculum.

Short-Form Application of the Screening Test of Spanish Grammar and the Northwestern Syntax Screening Test to Latino Children

1978 ◽  
Vol 9 (4) ◽  
pp. 220-235
Author(s):  
David L. Ratusnik ◽  
Carol Melnick Ratusnik ◽  
Karen Sattinger
Keyword(s):  
New York ◽  
Case Studies ◽  
Metropolitan Area ◽  
Screening Test ◽  
Normative Data ◽  
Short Form ◽  
Latino Children ◽  
Data Application ◽  
York Metropolitan Area ◽  
Multiple Regression Technique

Short-form versions of the Screening Test of Spanish Grammar (Toronto, 1973) and the Northwestern Syntax Screening Test (Lee, 1971) were devised for use with bilingual Latino children while preserving the original normative data. Application of a multiple regression technique to data collected on 60 lower social status Latino children (four years and six months to seven years and one month) from Spanish Harlem and Yonkers, New York, yielded a small but powerful set of predictor items from the Spanish and English tests. Clinicians may make rapid and accurate predictions of STSG or NSST total screening scores from administration of substantially shortened versions of the instruments. Case studies of Latino children from Chicago and Miami serve to cross-validate the procedure outside the New York metropolitan area.

Case Studies for Telepractice in AAC

2014 ◽  
Vol 23 (1) ◽  
pp. 42-54 ◽  
Author(s):  
Tanya Rose Curtis
Keyword(s):  
Service Delivery ◽  
Case Studies ◽  
Eye Gaze ◽  
Cognitive Impairments ◽  
Perceived Barriers ◽  
Computer Experience ◽  
Access Methods ◽  
Complex Communication Needs ◽  
Barriers To Service ◽  
Communication Needs

As the field of telepractice grows, perceived barriers to service delivery must be anticipated and addressed in order to provide appropriate service delivery to individuals who will benefit from this model. When applying telepractice to the field of AAC, additional barriers are encountered when clients with complex communication needs are unable to speak, often present with severe quadriplegia and are unable to position themselves or access the computer independently, and/or may have cognitive impairments and limited computer experience. Some access methods, such as eye gaze, can also present technological challenges in the telepractice environment. These barriers can be overcome, and telepractice is not only practical and effective, but often a preferred means of service delivery for persons with complex communication needs.

Sign in / Sign up

Export Citation Format

Share Document