Emulsion explosive composition and preparation method therefor

Abstract

The present invention relates to an emulsion composition for an explosive and to a method of preparing the same, wherein the emulsion composition includes, based on the total weight thereof, 85 to 95 wt % of an oxidizing agent aqueous solution, 0.3 to 5 wt % of an emulsifier, and 3 to 10 wt % of oil, the emulsifier including a PIBSA (polyisobutylene succinic anhydride) amine salt having an acid value of 30 or less and an amine value of 45 to 65, under a precondition that the oxidizing agent aqueous solution includes at least one of industrial ammonium nitrate, agricultural ammonium nitrate and low-specific-gravity ammonium nitrate for an ammonium nitrate fuel oil explosive, which is used without additional filtration or removal of impurities.

1 . An emulsion composition for an explosive, comprising an oxidizing agent aqueous solution including, as granular ammonium nitrate added with an organic or inorganic material including a phase-transition inhibitor, a solidification inhibitor or a coating agent, at least one of agricultural ammonium nitrate, porous ammonium nitrate for an ammonium nitrate fuel oil explosive and high-specific-gravity ammonium nitrate, and a fuel solution including an emulsifier and an oil,
 wherein the emulsifier includes a PIBSA (polyisobutylene succinic anhydride) amine salt having an acid value of 30 or less and an amine value of 45 to 65.   
     
     
         2 . The emulsion composition of  claim 1 , comprising 85 to 95 wt % of the oxidizing agent aqueous solution, 0.3 to 5 wt % of the emulsifier, and 3 to 10 wt % of the oil, based on a total weight of an emulsion. 
     
     
         3 . The emulsion composition of  claim 1 , wherein the oxidizing agent aqueous solution further includes at least one of potassium nitrate and sodium nitrate. 
     
     
         4 . The emulsion composition of  claim 1 , wherein the emulsifier further includes 20 wt % or less of SMO (sorbitan monooleate) based on a total weight of the emulsifier. 
     
     
         5 . The emulsion composition of  claim 1 , wherein the oil is at least one selected from the group consisting of mineral oil and light oil. 
     
     
         6 . The emulsion composition of  claim 1 , wherein an emulsion has a bulk density of 1.20 to 1.50 g/cc. 
     
     
         7 . The emulsion composition of  claim 1 , wherein the PIBSA amine salt is contained in an amount of 100 wt % or less but exceeding 80 wt % based on a total weight of the emulsifier. 
     
     
         8 . The emulsion composition of  claim 1 , wherein the organic or inorganic material including the phase-transition inhibitor, the solidification inhibitor or the coating agent includes at least one selected from among magnesium nitrate, silicate, clay, aluminum sulfate, diatomaceous earth, talc, and an amine salt. 
     
     
         9 . A method of preparing an emulsion composition for an explosive, the method comprising:
 preparing an oxidizing agent aqueous solution including ammonium nitrate added with an organic or inorganic material including a phase-transition inhibitor, a solidification inhibitor or a coating agent at 50° C. to 95° C.; and   preparing an emulsion by emulsifying the oxidizing agent aqueous solution at 50° C. to 95° C. using a fuel solution including an emulsifier and a fuel oil, without an additional filtration or purification process,   wherein the emulsifier includes a PIBSA (polyisobutylene succinic anhydride) amine salt having an acid value of 30 or less and an amine value of 45 to 65.   
     
     
         10 . The method of  claim 9 , wherein the emulsion composition has a bulk density of 1.20 to 1.50 g/cc. 
     
     
         11 . The method of  claim 9 , wherein the emulsion composition comprises 85 to 95 wt % of the oxidizing agent aqueous solution, 0.3 to 5 wt % of the emulsifier, and 3 to 10 wt % of the oil, based on a total weight of the emulsion. 
     
     
         12 . The method of  claim 9 , wherein the PIBSA amine salt is contained in an amount of 100 wt % or less but exceeding 80 wt % based on a total weight of the emulsifier. 
     
     
         13 . The method of  claim 9 , wherein the organic or inorganic material including the phase-transition inhibitor, the solidification inhibitor or the coating agent includes at least one selected from among magnesium nitrate, silicate, clay, aluminum sulfate, diatomaceous earth, talc, and an amine salt.