Summary In fireworks industries, mixing and filling of chemicals are being done manually and hence, dust formation is inevitable. Due to inherent nature of ingredients like aluminium metal powder, which has more combustible and the possibilities of dust explosion are merely high. Nowadays, the use of boron as a replacement of aluminium in firecracker mixtures is being researched upon. Hence, this paper aims at measuring the minimum ignition temperature (MIT) of existing and boron blended firework composition by using Godbert Greenwald furnace. Nowadays, many firework industries are employing automation. In such places, by limiting the level of oxygen supply with Nitrogen gas, the accidents can be avoided. Hence, the limiting oxygen concentration (LOC) is also measured. It has been concluded that the probability of ignition is higher when the replacement level of aluminium with boron is less than 70% at a concentration of 1456 g/m3 with less than 75% inert gas level. The safe margin has been found which will be useful for risk assessment study.

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In firework industries, flash powder which is a chemical mixture is used for crackers manufacturing. Flash powder is a highly inflammable chemical mixture. It consists of Aluminium, Sulphur, and Potassium Nitrate. In the manufacturing, daily wastes are collected and burned in the open pit. This leads not only to air pollution but also causes many accidents. There seems to exist no satisfactory method of waste disposal that is suitable for explosive waste. Here, the author has suggested a novel method according to which the explosives can be converted into an inert substance by adding solid inertants and then can be safely disposed by land fill. A solid inertant mono-ammonium phosphate (MAP) chemical was utilized to lower the flash powder's sensitivity. MAP is a fire extinguishing agent which can also be used as a fertilizer for the soil. In this work, various tests like layer ignition temperature, friction and impact sensitivity, plant growth test and decomposition test were conducted for the MAP mixed flash powder. From the various tests, it has been concluded that 50% MAP mixed flash powder would be safe to handle and that 75% mixed flash powder does not decompose at all weather conditions. After land filling, soil is not polluted, and it could be used for agriculture purpose.

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