48results about How to "Reduce explosiveness" patented technology

Disclosed is a process for reclaiming and using blast furnace iron-smelting bug dust. The hop-pocket dust, gravitational force gray and other iron containing bug dust which are reclaimed during the blast furnace smelting process are mixed homogeneously with coal fines, and then are sprayed into a furnace hearth through the tuyeres of blast furnace, wherein it is required that there is no accumulation at the furnace hearth and no tumour junction at the furnace throat before the blowing. The processing parameters are as follows: when hop-pocket dust is sprayed, the spraying-in amount is 6-10 kg / t iron, the hot blast temperature is higher than 1000 DEG C, the blast furnace zincium load is lower than 0.15 kg / t iron; when gravitational force gray is sprayed, the spraying-in amount is 6-15 kg / t iron, the hot blast temperature is higher than 1050 DEG C; when other iron containing bug dust is sprayed, the spraying-in amount is lower than 8 kg / t iron, the bug dust particle diameter is smaller than 0.5 mm, the hot blast temperature is higher than 1050 DEG C. The present invention has the advantages such as iron increasing, energy saving, molten iron silicon reduction favoring, blast furnace smooth running and intensification smelting promoting, coal spraying safety favoring, blast furnace tumour junction alleviating, environment protecting, clean production, and the like.

The invention relates to a high-energy type coal mine emulsion explosive which comprises the following materials: ammonium nitrate, sodium nitrate, flame inhibitor, water, oil phase material, organic active material and water-in-oil type emulsifying agent, wherein the ammonium nitrate, the sodium nitrate, the flame inhibitor and the water form aqueous phase; and the oil phase material, the organic active material and the water-in-oil type emulsifying agent form oil phase. The high-energy type coal mine emulsion explosive solves the problem that in order to meet the safety requirement of the existing allowable emulsion explosive technology of coal mines at home and abroad, a great deal of inert inorganic flame inhibitors such as sodium chloride, potassium chloride, ammonium chloride and the like are needed to be added into the aqueous phase, so that the explosion performance of the explosive is greatly reduced. The high-energy type coal mine emulsion explosive realizes the consistency of explosion performance, storage performance and preparation technology between the coal mine type emulsion explosive product and the rock-type emulsion explosive product.

Perfuming or flavoring microcapsules that include, further to a perfuming or flavoring ingredient and a carrier material, an explosion suppressant, proved to undergo, when suspended in hot air during their preparation, an explosion of a reduced violence. The explosion suppressant is selected from C1 to C12 carboxylic acids, their salts and mixtures of these.

This invention relates to a waste detonator destroying method and device, wherein the method comprises two procedures of preliminary detonator passivation process and afterward detonator burning destroying. The former procedure is to dip the detonator in passivation liquid to make the hard detonator lose their explosion property. The later is to locate the processed detonator into the special destroying device with sealed door forward and grid net through bottom lighting mouth to light up paper to destroy them in the tank.

The invention relates to a system adopting a high concentration CO2 flue gas as a coal dust drying medium in a boiler and belongs to the technical field of energy technology application and CO2 capture. The flue gas which is dehydrated and heated to a certain temperature and contains over 95 percent of CO2 is used as the drying medium for coal dust pulverizing. The drying medium is an inert gas with low oxygen content so as to solve the problem of easy explosion of a coal pulverizing system when hot air is used as the drying medium and improve the operational safety of the coal pulverizing system. Meanwhile, compared with the temperature of the hot air, the initial temperature of the drying medium can be greatly improved so as to reduce the power consumption of a coal mill, improve the fineness of coal dust, improve combustion efficiency, reduce the exhaust gas temperature and improve the heat efficiency of the boiler.

The invention discloses a coal blending method of blast-furnace-injected pulverized coal and the blast-furnace-injected pulverized coal. The coal blending method comprises the following steps: grinding low-rank coal into the coal powder of the low-rank coal, wherein the coal powder of which the particle size is smaller or equal to 100-mesh bore diameter accounts for 38.05-93.74% of the total weight of the coal powder of the low-rank coal; then mixing the coal powder of the low-rank coal with coal powder of the other coals to obtain the blast-furnace-injected pulverized coal. According to the coal blending method of the blast-furnace-injected pulverized coal, the particle size of the low-rank coal is broadened in the powdering process so as to increase the content of the coal powder whose particle size is smaller or equal to 100-mesh bore diameter in the low-rank coal, so that the explosiveness of the coal powder is reduced and the safety requirements of the blast furnace coal injection are met; thus, the ratio of the low-rank coal in coal blending is increased. Moreover, the dosage of the low-rank coal in the blast-furnace-injected pulverized coal is enlarged, so that the production costs of the iron and steel enterprises are greatly decreased and the economic benefits of the enterprises are increased.