fig1 is a flow diagram illustrating an embodiment of the invention . the apparatus comprises a container 1 for an oxidizer salt solution , a container 2 for a solution of liquid organic fuel and emulsifier , pumps 3 and 4 , solution flow meters 5 and 6 , a blender 7 , a mixer 8 , containers 9 and 10 ( additional containers can be used ) for dry , particulate ingredients , a delivery pump 11 , a delivery conduit 12 and a power source 13 . not shown is a movable base upon which the apparatus preferably is housed . in operation , the solutions in containers 1 and 2 are pumped by pumps 3 and 4 through solution flow meters 5 and 6 into blender 7 in which the solutions are blended into an emulsion phase . dry , particulate ingredients from containers 9 and 10 are then mixed into the emulsion phase to form the final water - in - oil emulsion blasting agent which is then pumped by delivery pump 11 through delivery conduit 12 into a borehole or other receptacle . power source 13 provides power for all dynamic operations . the invention and certain preferred embodiments will be described in more detail below . fig2 is a side schematic view of a preferred embodiment of the invention . a movable base 14 houses the apparatus . although shown in the drawing as a heavy duty truck , the movable base could be a skid , trailer , light duty truck , or other means . the movable base need not be capable of its own locomotion , as is the truck shown in the drawing , but a self - locomotive base is generally more mobile . the size and type of the base can depend upon the particular blasting application . for example , in underground applications , the base and housed apparatus may need to be relatively compact . in these applications , the movable base could be a small trailer or skid or a light duty truck . for open pit blasting applications , the heavy duty truck shown in fig2 is desirable because of its large volume capacity . numerous types of movable bases could be employed by those skilled in the art . mounted on the movable base 14 is an oxidizer salt solution container 15 . the solution is aqueous and the dissolved oxidizer salt is that or a combination of those commonly employed in water - in - oil emulsions blasting agents . see , for example , u . s . pat . no . 4 , 141 , 767 . a means ( not shown ) for maintaining the oxidizer salt solution at a temperature above its crystallization temperature is employed to keep the salts in solution . one means is simply to insulate the container , but a heating element could be used if necessary or desired . container 16 is for a solution of liquid organic fuel and emulsifier . although these ingredients may be kept in separate containers , preferably they are combined into a single solution . the fuel and emulsifier are of the type commonly employed in the art . if desired , the solution container ( s ) may be heated for fluidity and compatability with the oxidizer salt solution . the solutions in containers 15 and 16 are pumped by pumps 17 and 18 , respectively , from the containers through solution flow meters 19 and 20 . the pumps can be types conventionally employed . typical pumps include positive displacement pumps such as a waukesha ( 0 - 150 gpm ) for the oxidizer salt solution and a delta ( 0 - 7 gpm ) for the fuel and emulsifier solution . the solution flow meters can be standard tube and float rotameters or other flow monitoring means can be used . solution flow can be adjusted manually or automatically for predetermined flow rates . the inorganic oxidizer salt solution and the liquid organic fuel and emulsifier solution ( or separate streams of fuel and of an emulsifier solution ) are combined prior to blending in the blender 21 . as shown in fig2 the solutions are combined to form a fluid mixture in a t - joint 22 prior to entering the blender through inlet 23 . however , the solutions can be combined in other ways such as in blender 21 itself , in which instance the two solution flow lines ( not numbered ) from meters 19 and 20 would enter blender 21 through separate inlets , preferably located in either the bottom or lower sides of blender 21 . blender 21 blends the inorganic oxidizer salt solution , liquid organic fuel and emulsifier with sufficient shear to form an emulsion phase of these ingredients . as shown in fig4 and 5 , a preferred embodiment of the blender comprises a housing 37 , having an inlet 23 and an outlet 24 ; a shaft 38 rotably mounted within the housing 37 ; blades 39 affixed to and extending from the shaft 38 and spaced apart along the axis of the shaft 38 ; and stators 40 mounted within the housing 37 and interposed between some or all of the spaces between the blades 39 . in fig4 each stator is separated by three blades . other types of blenders which could be used include homogenizers , colloid mills , shear pumps , ultrasonic mixers , and various other appropriate types of mixers . to initiate production of the emulsion phase , it is preferred that a seed emulsion phase be formed first . this can be accomplished by closing outlet 24 and introducing a fuel - rich blend of the oxidizer salt solution , liquid organic fuel and emulsifier into the blender 21 . then , the blades 39 are rotated , for example at a speed of 1000 rpm , to blend the ingredients into an emulsion phase . the formation of the emulsion phase can be detected by a marked increase in viscosity of the blend . once the blender becomes filled with the seed emulsion phase , the blender speed generally is increased to 1800 rpm , for example , the outlet is opened , the liquid fuel flow rate is reduced to the desired level , and the blending process then can proceed continuously or intermittently as desired . as shown in fig6 the emulsion phase goes through outlet 24 and into a dries mixer 25 , wherein the dry ingredients are added from containers 24 , 27 and 28 ( fig2 and 3 ) by screw conveyors 29 , 30 and 31 and then mixed uniformly throughout the emulsion phase . the dry ingredients generally include one or more particulate fuels such as aluminum granules , prilled or ground oxidizer salt , and density reducing agents such as perlite or hollow plastic or glass spheres , which , if desired , could be preadded to the oxidizer salt solution . see , for example , u . s . pat . no . 4 , 141 , 767 . the mixing is preferably accomplished by means of rotating blades or paddles in the dries mixer 25 . the blender 21 could be adapted to also function as the dries mixer , wherein the dry , particulate ingredients would be added to the blender after formation of the emulsion phase . thus , the blender and the mixer could be a single unit . the completely formulated emulsion blasting agent leaves the dries mixer 25 , enters pump funnel 32 and then enters delivery pump 33 , which preferably is a positive displacement rotating screw pump , such as a monoflo mono ( 3 - 103 gpm h 2 o at 0 psi ). the emulsion blasting agent then is pumped through conduit 34 , preferably a heavy - duty rubber hose , and into a borehole or other receptacle . preferably , the conduit 34 is reeled on reel 35 ( shown in fig2 ) so that the end of the conduit can be lowered and raised during the borehole filling process . the boom 36 can be used to position conduit 34 with respect to the borehole . as an example of emulsion blasting agents formulated according to the above - described method and with the above - described apparatus , an emulsion of the type described in copending u . s . ser . no . 004 , 958 , containing 11 percent foil aluminum and 1 . 5 % microballoons was formulated at a production rate of 300 lbs / min . and pumped at 170 psi through a 100 foot length of 2 - inch diameter rubber hose . the emulsion blasting agent had a critical diameter of 38 mm at 5 ° c . at a density of 1 . 26 g / cc . the power source for all dynamic operations preferably is a hydraulic system powered by a diesel or gasoline engine . the details of such a system are not shown but are well - known by those skilled in the art . other power means would include electrical , pneumatic and mechanical systems . all of these systems or combinations thereof could be used by those skilled in the art . the pumps and screw conveyors can be adjusted either manually or automatically to provide the desired flow rates of the various ingredients so that the formulated emulsion blasting agent has the desired composition . this composition can be changed during the formulating process , if desired , by manually or automatically adjusting the ingredient flow rates to the desired levels at the desired times . thus , the composition of the blasting agent can be varied from the bottom of a borehole to the top , depending on the blasting agent characteristics desired , without interrupting the formulating and delivery process . of course the blasting agent composition also can be changed from borehole to borehole if desired . an automatic metering system is not shown but is known to those skilled in the art . while the present invention has been described with reference to certain illustrative examples and preferred embodiments , various modifications will be apparent to those skilled in the art and any such modifications are intended to be within the scope of the invention as set forth in the appended claims .