CN114853553A - High-sulfur-content mining emulsion explosive and production process method thereof - Google Patents
High-sulfur-content mining emulsion explosive and production process method thereof Download PDFInfo
- Publication number
- CN114853553A CN114853553A CN202210474226.XA CN202210474226A CN114853553A CN 114853553 A CN114853553 A CN 114853553A CN 202210474226 A CN202210474226 A CN 202210474226A CN 114853553 A CN114853553 A CN 114853553A
- Authority
- CN
- China
- Prior art keywords
- emulsion explosive
- phase
- weight
- sulfur
- thiourea
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002360 explosive Substances 0.000 title claims abstract description 132
- 239000000839 emulsion Substances 0.000 title claims abstract description 114
- 238000005065 mining Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title abstract description 18
- 239000012071 phase Substances 0.000 claims abstract description 134
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 99
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims abstract description 98
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000003921 oil Substances 0.000 claims abstract description 65
- 239000008346 aqueous phase Substances 0.000 claims abstract description 55
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 44
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 32
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 26
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 25
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 22
- 239000010705 motor oil Substances 0.000 claims abstract description 21
- 239000002283 diesel fuel Substances 0.000 claims abstract description 15
- 230000001235 sensitizing effect Effects 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 66
- 238000003860 storage Methods 0.000 claims description 32
- 238000002360 preparation method Methods 0.000 claims description 30
- 239000011159 matrix material Substances 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 24
- 238000005474 detonation Methods 0.000 claims description 22
- 238000011068 loading method Methods 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 14
- 238000002425 crystallisation Methods 0.000 claims description 13
- 230000008025 crystallization Effects 0.000 claims description 13
- 239000011593 sulfur Substances 0.000 claims description 13
- 229910052717 sulfur Inorganic materials 0.000 claims description 13
- 238000004945 emulsification Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000003814 drug Substances 0.000 claims description 9
- 230000001804 emulsifying effect Effects 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004202 carbamide Substances 0.000 abstract description 16
- 238000010276 construction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 2
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 description 12
- 238000005422 blasting Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 238000005086 pumping Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 6
- 229950004959 sorbitan oleate Drugs 0.000 description 6
- 230000002269 spontaneous effect Effects 0.000 description 6
- 238000004880 explosion Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- -1 sorbitan oleate) Chemical compound 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002889 sympathetic effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B31/00—Compositions containing an inorganic nitrogen-oxygen salt
- C06B31/28—Compositions containing an inorganic nitrogen-oxygen salt the salt being ammonium nitrate
- C06B31/285—Compositions containing an inorganic nitrogen-oxygen salt the salt being ammonium nitrate with fuel oil, e.g. ANFO-compositions
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Liquid Carbonaceous Fuels (AREA)
Abstract
A high-sulfur-content mining emulsion explosive comprises water phase components: 73-75% by weight of ammonium nitrate, 2.50-3.00% by weight of thiourea and 0.030-0.035% by weight of nitric acid; oil phase components: 2.50-3.00% of diesel oil, 1.50-2.00% of engine oil and 1.00-1.50% of emulsifier; sensitizing components: 0.010-0.015% by weight of sodium nitrite; the balance of water. The formula and the production process method of the high-sulfur-content mining emulsion explosive eliminate the negative effect of urea on the aqueous phase of the emulsion explosive, solve the bottleneck problem of 5-hour shutdown adjustment and detection, greatly prolong the operation time, greatly facilitate continuous construction operation, reduce the construction operation time cost and the labor cost, and remarkably improve the construction operation efficiency. The process performance of the high-sulfur-content mining emulsion explosive is qualitatively leaped, and the use scene is rapidly expanded.
Description
Technical Field
The invention relates to a formula of an emulsion explosive and a preparation method thereof, in particular to a high-sulfur-content mining emulsion explosive and a production process method thereof.
Background
The sulfur content of the copper ore body is high, and the emulsion explosive is directly contacted with blast holes (ore rock powder), so that a chemical exothermic reaction is easily generated, and a spontaneous combustion phenomenon is caused in a high-sulfur area. In order to solve the problem, the emulsion explosive is added with a certain amount of urea to form the self-ignition-preventing emulsion explosive. However, in the production and preparation of the aqueous phase of the emulsion explosive, the crystallization point and the pH value of the production process parameters of the aqueous phase can change along with the time due to the addition of the urea, so that the quality of the emulsion explosive is seriously affected, and the ground test explosion velocity of the emulsion explosive is sharply reduced or refused. The existing emulsion explosive for preventing spontaneous combustion comprises the following specific formula: 75-76% of ammonium nitrate, 0.10% of thiourea, 0.030% of nitric acid, 2.5% of urea, 4.0% of diesel oil, 1.5% of emulsifier and the balance of water. The preparation and use process of the emulsion explosive comprises the following steps: the water phase and the oil phase are manufactured according to the production process requirements and are respectively stored in two containers, then the water phase, the oil phase, a sensitizing agent and the like are respectively loaded into different containers of a mixing truck, the containers are pulled to a blasting operation site, an emulsion matrix explosive is manufactured by the mixing truck and is immediately loaded into a blast hole, and after 5-30 min, the emulsion matrix explosive becomes the real spontaneous combustion preventing emulsion explosive. When the aqueous phase is produced, urea and an oxidant (ammonium nitrate) are added into a certain amount of water according to a certain proportion at the same time, and after the urea and the oxidant (ammonium nitrate) are dissolved, the aqueous phase required by the production of the emulsion explosive is obtained. The process index for the aqueous phase is the crystallization point (required to be between 56 ℃ and 60 ℃), the pH value (required to be between 3.8 and 4.0), and the temperature. The crystallization point of the aqueous phase is reduced and the pH value is increased with the addition of the urea, the change is larger and larger along with the prolonging of time, the pH value can reach more than 4.0 after the prepared aqueous phase is stored for 5 hours, and although the crystallization point is still in a qualified range, the explosive quality is obviously reduced and the explosion velocity is reduced; after 20 hours, the pH value can reach more than 5.4, the crystallization point can be reduced to be unqualified, and the detonation velocity of the emulsion explosive prepared from the water phase is below 3886m/s, and the emulsion explosive is unqualified and even cannot detonate. Therefore, in order to ensure that the explosives with qualified quality are prepared, a plurality of process measures are adopted: the urea is added into the water phase when the water phase production is finished every day, so that the existence time of the urea in the water phase is shortened as much as possible; adjusting the crystallization point and the pH value of the water phase half an hour before inputting the explosive mixed truck; after the adjustment, the medicine is taken immediately, and the water phase is used up within 5 hours after the water phase is adjusted; during operation, the pH value and the crystallization point of the water phase need to be adjusted once every 5 hours, great inconvenience is brought to construction, time and labor cost are increased, and working efficiency is reduced; during the collection every day, water phase always remains, the remaining water phase must be pumped into a water phase storage tank of a water phase workshop before being loaded, and the water phase and new water phase are readjusted for standby on the next day, so that the labor cost and the operation time are increased. The formula and the production process of the high-sulfur-content mining emulsion explosive need to be improved, the negative effect of urea on the aqueous phase of the emulsion explosive is eliminated, the continuous construction operation is convenient, the time and the labor cost are reduced, and the construction operation efficiency is improved.
Disclosure of Invention
Aiming at the defects of the formula and the production process of the prior high-sulfur-content mining emulsion explosive, the invention provides a high-sulfur-content mining emulsion explosive, which comprises
Water phase components: 73-75% by weight of ammonium nitrate, 2.50-3.00% by weight of thiourea and 0.030-0.035% by weight of nitric acid;
oil phase components: 2.50-3.00% of diesel oil, 1.50-2.00% of engine oil and 1.00-1.50% of emulsifier (Span-80, namely sorbitan oleate);
sensitizing components: 0.010-0.015% by weight of sodium nitrite;
the balance of water. The parts by weight of all components add up to 100%.
Specifically, the kinematic viscosity of the engine oil is 10.5-14.5 mm at 100 DEG C 2 And/s, flash point (open) of not less than 160 ℃.
The invention also provides a production process method of the high-sulfur-content mining emulsion explosive,
the method comprises the following steps:
preparation of aqueous phase solution: firstly crushing ammonium nitrate to form an ammonium nitrate aqueous solution, simultaneously dissolving the ammonium nitrate aqueous solution, thiourea and nitric acid in hot water at the temperature of 76-85 ℃, adjusting the pH value of the solution to 3.8-4.0, and storing the aqueous phase solution at the temperature of 75-82 ℃;
preparing an oil phase: heating the oil phase to 40-50 ℃ through a special storage tank and a steam coil type heat exchanger;
an emulsification step: conveying the water phase and the oil phase obtained in the water phase solution preparation step and the oil phase preparation step to a field mixed emulsion explosive truck for storage, and stirring the mixture in an emulsifier at a rotating speed of 750-1000 rpm to obtain an emulsion matrix;
mixing and loading on site: and mixing the emulsion matrix obtained in the emulsification step with a sodium nitrite additive to obtain the special emulsion explosive for the high-sulfur-content ore.
Further, the step of preparing the aqueous phase solution further comprises the steps of:
the method is characterized in that the crystallization point of the water phase is adjusted to be 55-60 ℃, the pH value is 3.8-4.0, the temperature is 75-82 ℃ before the explosive mixed vehicle is fed with the water phase, the water phase is used immediately after the adjustment, the water phase is ensured to be used up within 72-96H after the water phase is adjusted, and the time H for using up the water phase can be longer when the amount of thiourea added is smaller for 72-96H.
Furthermore, said time H hours for the exhaustion of the aqueous phase corresponds to an empirical value between 2.50% and 3.00% of the percentage by weight a% of thiourea added.
Further, the oil phase preparation step further comprises the steps of:
sequentially adding the diesel oil, the emulsifier and the engine oil into an oil phase preparation tank in a corresponding order, fully and uniformly stirring, and filtering to pump into an oil phase storage tank.
Further, the on-site mixing step further comprises the following steps:
if the solution in the storage tank is not used up for 72-96 h (according to the specific determination of the amount of thiourea (2.50-3.00%), before the next administration,
re-adjusting the temperature and the pH value, and adding a proper amount of nitric acid to adjust the pH value to 3.8-4.0 in time when the pH value is higher according to a test;
if the prepared aqueous phase solution exceeds 96 hours, the thiourea is added in a supplementary manner according to 3-4 percent of the original proportion;
if the prepared aqueous phase solution does not exceed 96 hours, the thiourea is added in a supplementary manner according to 1.5-2% of the original proportion;
the sensitizer is prepared by mixing 1 part of sodium nitrite and 3.5-4.5 parts of water according to the proportion of 1 (3.5-4.5).
Further, in the emulsifying step, the water phase and the oil phase are emulsified in a vehicle-mounted emulsifier in a weight part ratio of (92-96)% to (4-8)% to form an emulsion matrix, the emulsion matrix is sensitized to form an emulsion explosive, and whether the explosive meets the standard or not is judged by detecting the density and the detonation velocity of the emulsion explosive.
Further, the specific indexes for judging whether the explosive meets the standard are as follows: the density reaches 1.00-1.25 g/cm3, and the detonation velocity reaches more than 4000 m/s.
The invention has the beneficial effects that:
firstly, on the basis of the existing formula, the urea component is removed, the content of thiourea is increased to 2.50-3.00 wt%, and then 1.50-2.00 wt% of engine oil is added, so that the using amount of ammonium nitrate is reduced to 73-75 wt%; furthermore, the production process method is improved: constructing according to an empirical value corresponding table of the time H hours after the water phase is used up and the weight percent a% of the thiourea added is between 2.50% and 3.00%, sequentially adding the diesel oil, the emulsifier and the engine oil into an oil phase preparation tank in the oil phase preparation step in a corresponding order, fully and uniformly stirring, and filtering and pumping into an oil phase storage tank; and the on-site mixing step further comprises the following steps: if the solution in the storage tank is not used up within 72-96 h (determined according to the amount of thiourea (2.50-3.00%) to be added), the temperature and the pH value are re-adjusted before the next administration, and a proper amount of nitric acid is timely added to adjust the pH value to 3.8-4.0 when the pH value is tested to be higher; if the prepared aqueous phase solution exceeds 96 hours, the thiourea is added according to 3 to 4 percent of the original proportion; if the prepared aqueous phase solution does not exceed 96 hours, the thiourea is added in a supplementary manner according to 1.5-2% of the original proportion; the sensitizer is prepared by mixing 1 part of sodium nitrite and 3.5-4.5 parts of water according to the proportion of 1 (3.5-4.5). By the aid of the series of measures, the formula and the production process method of the high-sulfur-content mining emulsion explosive eliminate negative effects of urea on an aqueous phase of the emulsion explosive, solve the bottleneck problem of 5-hour shutdown adjustment detection, greatly prolong the operation time, greatly facilitate continuous construction operation, reduce the construction operation time cost and the labor cost, and remarkably improve the construction operation efficiency. The process performance of the high-sulfur-content mining emulsion explosive is greatly improved, and the use scene is rapidly expanded.
Drawings
FIG. 1 is a schematic diagram of a production process flow of the high-sulfur-content mining emulsion explosive;
in the figure: 1-a boiler; 2-steam; 3-water; 4-ammonium nitrate; 5-a crusher; 6-a screw conveyor; 7-reaction tank (about 90 ℃); 8-a solution pump; 9-a stirrer; 10-aqueous phase; 101-aqueous phase storage tank (about 70-80 ℃); 11-nitric acid; 12-thiourea tank; 13-a filter; 14-mixed loading; 15-emulsifier tanks (two, about 50 ℃); 16-engine oil tank; 17-diesel tank; 18-preparing an oil phase tank; 19-filter (primary); 20-oil phase; 201-oil phase storage tank (about 30 deg.C); 21-filter (two stage); 22-sensitizer canister (sodium nitrite).
Detailed Description
Example 1:
the high-sulfur-content mining emulsion explosive provided by the embodiment comprises
Water phase components: 73 weight percent of ammonium nitrate, 2.50 weight percent of thiourea and 0.030 weight percent of nitric acid;
oil phase components: 2.50% by weight of diesel oil, 1.50% by weight of engine oil and 1.00% by weight of emulsifier, in this example Span-80, i.e. sorbitan oleate; the kinematic viscosity of the engine oil is 10.5mm at 100 DEG C 2 (ii)/s, flash point (open) is not lower than 160 ℃, and water-soluble acid and alkali are not needed;
sensitizing components: 0.010% by weight of sodium nitrite;
the balance of water. The parts by weight of all components including water add up to 100%.
As shown in fig. 1, a production process method of the high-sulfur-content mining emulsion explosive according to the formula of the embodiment is also provided, and comprises the following steps:
preparation of aqueous phase solution: firstly crushing ammonium nitrate to form an ammonium nitrate aqueous solution, simultaneously dissolving the ammonium nitrate aqueous solution, thiourea and nitric acid in hot water at the temperature of 76 ℃, specifically referring to figure 1, firstly dissolving the thiourea in a thiourea tank, pumping the thiourea into a water phase storage tank by using a solution pump, adding the nitric acid to adjust the pH value of the solution to be 3.8, and storing the water phase solution at the temperature of 75 ℃;
the step of preparing the aqueous phase solution further comprises the steps of:
the explosive is put into a dissolving tank before the water phase is input into an explosive mixing truck and is dissolved by steam heating (the solution temperature is 95 ℃), the crystallization point of the water phase needs to be adjusted to be 56 ℃, the pH value is 3.8, the temperature is 75 ℃, the explosive is used immediately after being adjusted, and the water phase needs to be used up within 96H after being adjusted. If the aqueous phase is not used up within 96H, the aqueous phase is stopped and adjusted once to the pH value and the crystallization point.
Compared with the condition that the product is used up within 5 hours required by the prior art, the working time is greatly prolonged, and the use scene is enlarged. In a further example the time to run out of the aqueous phase was 72H and in a further example the time to run out of the aqueous phase was 84H.
Specifically, the time H for the aqueous phase to run out is set to a value corresponding to the amount of thiourea (2.50% to 3.00%) added, and the time H for the aqueous phase to run out may be set to a value corresponding to the smaller amount of thiourea added. The empirical value of the percentage a% of the thiourea added is 2.50% -3.00%, which is in a linear relationship with the corresponding relationship of other data obtained by linear interpolation.
TABLE 1 correlation of the amount of thiourea added to the empirical value of the time H to run out of the aqueous phase
Preparing an oil phase: heating the oil phase to 40 ℃ through a special storage tank and a steam coil type heat exchanger;
the oil phase preparation step further comprises the steps of:
sequentially adding the diesel oil, the emulsifier and the engine oil into an oil phase preparation tank in a corresponding order, fully and uniformly stirring, and filtering to pump into an oil phase storage tank to form a composite oil phase solution meeting the process requirements.
An emulsification step: conveying the water phase and the oil phase obtained in the water phase solution preparation step and the oil phase preparation step (pumping by a solution pump) to a field mixed emulsion explosive truck for storage, adjusting process parameters in a rear control system by an operator after the explosive truck drives into a blasting operation surface, and obtaining an emulsion matrix at the stirring speed of 750 revolutions per minute in an emulsifier;
in the emulsifying step, the water phase and the oil phase are emulsified in a vehicle-mounted emulsifier in a weight ratio of 92% to 8% to form an emulsion matrix, the emulsion matrix is sensitized to form an emulsion explosive, whether the explosive meets the standard or not is judged by detecting the density and the detonation velocity of the emulsion explosive, and the density and the detonation velocity of the emulsion explosive are shown in table 2 and are emulsion explosives prepared by using the water phase within 96 hours.
Mixing and loading on site: and mixing the emulsion matrix obtained in the emulsifying step with a sodium nitrite additive, stirring by a mixer to form the high-sulfur-content mining emulsion explosive without detonator sensitivity, and pumping into the blast hole by a screw pump.
The field mixed loading step specifically comprises the following steps:
if the solution in the storage tank is not used up for 96h (according to the amount of thiourea (2.50% -3.00% see table 1) to be added), before the next administration,
re-adjusting the temperature and the pH value, and adding a proper amount of nitric acid in time to adjust the pH value to 3.8 when the pH value is higher according to a test;
if the prepared aqueous phase solution exceeds 96 hours, the thiourea is added in a supplementary manner according to 3 percent of the original proportion;
if the prepared aqueous phase solution does not exceed 96 hours, the thiourea is additionally added according to 1.5 percent of the original proportion;
the sensitizer is prepared according to the proportion of 1:3.5, namely 1 part of sodium nitrite is added with 3.5 parts of water and mixed evenly.
The specific indexes for judging whether the explosive meets the standard are as follows: the density reaches 1.00-1.25 g/cm3, and the explosion speed reaches more than 4000 m/s. The actual measurement shows that the ground surface density reaches 1.05g/cm3, and the detonation velocity reaches more than 4300 m/s.
In summary, the emulsification step and the field-loading step are completed in the field-loading explosive vehicle. Therefore, the on-site mixed explosive loading vehicle is driven into the blasting operation area according to the requirement of on-site blasting, the waiting dosage is set on the back control computer according to the flow data of each component provided by the calibration data table of the explosive loading vehicle, the whole process can be operated in a manual or automatic mode, each mode has repeatability, and the monitoring is carried out through a tachometer, a counter and a flowmeter. The medicine filling is only needed to be input into the counter to input the medicine conveying amount of each hole, the liquid crystal display screen can display dynamic data when materials are output, the single-hole medicine filling amount and the accumulated medicine filling amount can be accurately recorded, the metering error of each component is less than +/-0.5%, and the metering error of the medicine conveying counter is less than +/-5%; the hydraulic electric appliance control system can flexibly and accurately control each power driving element, effectively adjust the conveying capacity of the pump so as to adjust the proportion of each conveying component and control the quality of the explosive. Various control and operation mechanisms of the on-site explosive mixed loading vehicle can adopt various technical means in the prior art to complete corresponding devices and steps.
The technical effect of the high-sulfur-content mining emulsion explosive is counted on site, the deep hole blasting is carried out on 15m sulfur-containing mining area steps, the ratio of the high-sulfur-content mining emulsion explosive produced by adopting an on-site mixed explosive truck to the conventional explosive is adopted, and the spontaneous combustion rate is 0.
The comparative data of the performance of the emulsion explosive for the mine in the embodiment and the prior high-sulfur-content mine are shown in the table 2.
Example 2:
the high-sulfur-content mining emulsion explosive provided by the embodiment comprises
Water phase components: 74% by weight of ammonium nitrate, 2.73% by weight of thiourea and 0.033% by weight of nitric acid;
oil phase components: 2.77 percent of diesel oil, 1.85 percent of engine oil and 1.38 percent of emulsifier by weightExamples of emulsifiers are Span-80, i.e. sorbitan oleate; the kinematic viscosity of the engine oil is 12.5mm at 100 DEG C 2 (ii)/s, flash point (open) is not lower than 160 ℃, and water-soluble acid and alkali are not needed;
sensitizing components: 0.0125% by weight of sodium nitrite;
the balance of water. The parts by weight of all components including water add up to 100%.
As shown in fig. 1, a production process method of the high-sulfur-content mining emulsion explosive according to the formula of the embodiment is also provided, and comprises the following steps:
preparation of aqueous phase solution: firstly, crushing ammonium nitrate to form an ammonium nitrate aqueous solution, simultaneously dissolving the ammonium nitrate aqueous solution, thiourea and nitric acid in hot water at the temperature of 80 ℃, adjusting the pH value of the solution to be 3.9, and storing the aqueous phase solution at the temperature of 78 ℃;
the step of preparing the aqueous phase solution further comprises the steps of:
putting the water phase into a dissolving tank before inputting the explosive mixed vehicle, heating the water phase by steam for dissolving (the solution temperature is 95 ℃), adjusting the crystallization point of the water phase to 57 ℃, the pH value to 3.9 and the temperature to 78 ℃, immediately using the water phase after adjusting, and ensuring that the water phase is used up within 84H after adjusting the water phase.
Preparing an oil phase: heating the oil phase to 45 ℃ through a special storage tank and a steam coil type heat exchanger;
the oil phase preparation step further comprises the steps of:
sequentially adding the diesel oil, the emulsifier and the engine oil into an oil phase preparation tank in a corresponding order, fully and uniformly stirring, and filtering to pump into an oil phase storage tank to form a composite oil phase solution meeting the process requirements.
An emulsification step: conveying the water phase and the oil phase obtained in the water phase solution preparation step and the oil phase preparation step (pumping by a solution pump) to a field mixed emulsion explosive truck for storage, adjusting process parameters in a rear control system by an operator after the explosive truck drives into a blasting operation surface, and obtaining an emulsion matrix at the stirring speed of 850 rpm in an emulsifier;
in the emulsifying step, the water phase and the oil phase are emulsified in a vehicle-mounted emulsifier in a weight ratio of 94 to 6 percent to form an emulsion matrix, the emulsion matrix is sensitized to form an emulsion explosive, whether the explosive meets the standard or not is judged by detecting the density and the detonation velocity of the emulsion explosive, and the density and the detonation velocity of the emulsion explosive are shown in table 2 and are the emulsion explosive prepared by using the water phase within 84 hours. Compared with the condition that the product is used up within 5 hours required by the prior art, the working time is greatly prolonged, and the use scene is enlarged.
Mixing and loading on site: and mixing the emulsion matrix obtained in the emulsifying step with a sodium nitrite additive, stirring by a mixer to form the high-sulfur-content mining emulsion explosive without detonator sensitivity, and pumping into the blast hole by a screw pump.
The field mixed loading step specifically comprises the following steps:
if the solution in the storage tank is not used up within 84 hours, before the next administration,
re-adjusting the temperature and the pH value, and adding a proper amount of nitric acid to adjust the pH value to 3.9 in time when the pH value is higher according to a test;
if the prepared aqueous phase solution exceeds 84 hours, the thiourea is added in a supplementary manner according to 3.5 percent of the original proportion;
if the prepared aqueous phase solution does not exceed 84 hours, adding the thiourea in a supplementary manner according to 1.75 percent of the original proportion;
the sensitizer is prepared according to the proportion of 1:4.0, namely 1 part of sodium nitrite is added with 4.0 parts of water to be mixed evenly.
The specific indexes for judging whether the explosive meets the standard are as follows: the density reaches 1.00-1.25 g/cm3, and the detonation velocity reaches more than 4000 m/s. The actual measurement shows that the ground surface density reaches 1.15g/cm3, and the explosion velocity reaches more than 4600 m/s.
The technical effect of the high-sulfur-content mining emulsion explosive is counted on site, the deep hole blasting is carried out on 15m sulfur-containing mining area steps, the ratio of the high-sulfur-content mining emulsion explosive produced by adopting an on-site mixed explosive truck to the conventional explosive is adopted, and the spontaneous combustion rate is 0.
The comparative data of the performance of the emulsion explosive for the mine in the embodiment and the prior high-sulfur-content mine are shown in the table 2.
Example 3:
the high-sulfur-content mining emulsion explosive provided by the embodiment comprises
Water phase components: 75% by weight of ammonium nitrate, 3.00% by weight of thiourea and 0.035% by weight of nitric acid;
oil phase components: 3.00 percent of diesel oil, 2.00 percent of engine oil and 1.50 percent of emulsifier by weight, wherein the emulsifier is Span-80, namely sorbitan oleate; the kinematic viscosity of the engine oil is 14.5mm at 100 DEG C 2 (ii)/s, flash point (open) is not lower than 160 ℃, and water-soluble acid and alkali are not needed;
sensitizing components: 0.015% by weight of sodium nitrite;
the balance of water. The parts by weight of all components including water add up to 100%.
As shown in fig. 1, a production process method of the high-sulfur-content mining emulsion explosive according to the formula of the embodiment is also provided, and comprises the following steps:
preparation of aqueous phase solution: firstly crushing ammonium nitrate to form an ammonium nitrate aqueous solution, simultaneously dissolving the ammonium nitrate aqueous solution, thiourea and nitric acid in hot water at the temperature of 85 ℃, adjusting the pH value of the solution to 4.0, and storing the aqueous phase solution at the temperature of 82 ℃;
the step of preparing the aqueous phase solution further comprises the steps of:
the explosive is put into a dissolving tank before the water phase is input into an explosive mixing truck and is dissolved by steam heating (the solution temperature is 95 ℃), the crystallization point of the water phase is required to be adjusted to be 59 ℃, the pH value is 4.0, the temperature is 82 ℃, the explosive is used immediately after being adjusted, and the water phase is used up within 72 hours after being ensured to be adjusted. Compared with the prior art that the water is used up within 5 hours, the operation time is greatly prolonged, and the use scene is enlarged.
Preparing an oil phase: heating the oil phase to 50 ℃ through a special storage tank and a steam coil type heat exchanger;
the oil phase preparation step further comprises the steps of:
sequentially adding the diesel oil, the emulsifier and the engine oil into an oil phase preparation tank in a corresponding order, fully and uniformly stirring, and filtering to pump into an oil phase storage tank to form a composite oil phase solution meeting the process requirements.
An emulsification step: conveying the water phase and the oil phase obtained in the water phase solution preparation step and the oil phase preparation step (pumping by a solution pump) to a field mixed emulsion explosive truck for storage, adjusting process parameters in a rear control system by an operator after the explosive truck drives into a blasting operation surface, and obtaining an emulsion matrix at the stirring speed of 1000 rpm in an emulsifier;
in the emulsifying step, the water phase and the oil phase are emulsified in a vehicle-mounted emulsifier in a weight ratio of 96 to 4 percent to form an emulsion matrix, the emulsion matrix is sensitized to form an emulsion explosive, whether the explosive meets the standard or not is judged by detecting the density and the detonation velocity of the emulsion explosive, and the density and the detonation velocity of the emulsion explosive are shown in the table 2 and are the emulsion explosive prepared by using the water phase within 72 hours.
Mixing and loading on site: and mixing the emulsion matrix obtained in the emulsifying step with a sodium nitrite additive, stirring by a mixer to form the high-sulfur-content mining emulsion explosive without detonator sensitivity, and pumping into the blast hole by a screw pump.
The field mixed loading step specifically comprises the following steps:
if the solution in the storage tank is not used up within 72 hours, before the next administration,
re-adjusting the temperature and the pH value, and adding a proper amount of nitric acid to adjust the pH value to 4.0 in time when the pH value is higher according to a test;
if the prepared aqueous phase solution exceeds 72 hours, the thiourea is additionally added according to 4 percent of the original proportion;
if the prepared aqueous phase solution does not exceed 72 hours, the thiourea is added in a supplementary manner according to 2 percent of the original proportion;
the sensitizer is prepared according to the proportion of 1:4.5, namely 1 part of sodium nitrite is added with 4.5 parts of water to be mixed evenly.
The specific indexes for judging whether the explosive meets the standard are as follows: the density reaches 1.00-1.25 g/cm3, and the detonation velocity reaches more than 4000 m/s. The actual measurement shows that the ground surface density reaches 1.23g/cm3, and the detonation velocity reaches above 4500 m/s.
The technical effect of the high-sulfur-content mining emulsion explosive is counted on site, the deep hole blasting is carried out on 15m sulfur-containing mining area steps, the ratio of the high-sulfur-content mining emulsion explosive produced by adopting an on-site mixed explosive truck to the conventional explosive is adopted, and the spontaneous combustion rate is 0.
The comparative data of the performance of the emulsion explosive for the mine in the embodiment and the prior high-sulfur-content mine are shown in the table 2.
Comparative example 1:
the existing emulsion explosive for high-sulfur mining areas mainly comprises the following components: 75% by weight of ammonium nitrate, 0.091% by weight of thiourea, 0.033% by weight of nitric acid, 2.73% by weight of urea, 2.77% by weight of diesel oil, 1.85% by weight of engine oil, 1.38% by weight of emulsifier (Span-80, i.e. sorbitan oleate), and the balance of water.
The density of the emulsion explosive of this comparative example was 1.25g/cm 3.
The method for preparing the emulsion explosive in the high-sulfur mining area comprises the following steps:
(1) and preparing an aqueous phase solution: firstly crushing ammonium nitrate to form an ammonium nitrate aqueous solution, simultaneously dissolving the ammonium nitrate aqueous solution, thiourea, urea and nitric acid in hot water at the temperature of 80 ℃, adjusting the pH value of the solution to be 3.9, and storing the aqueous phase solution at the temperature of 78 ℃; (2) preparing an oil phase: heating the oil phase to 45 ℃ through a special storage tank and a steam coil type heat exchanger; (3) and an emulsification step: conveying the water phase and the oil phase obtained in the steps (1) and (2) to a field mixed emulsion explosive truck for storage, wherein the stirring speed in the emulsifier is 850 revolutions per minute; (4) and field mixed loading: and (4) mixing the latex matrix obtained in the step (3) with additives such as sodium nitrite and the like to obtain the special emulsion explosive for the high-sulfur ore area.
In the step (3), the water phase and the oil phase are emulsified in a vehicle-mounted emulsifier in a ratio of 94% to 6% to form an emulsion matrix, and the emulsion explosive is sensitized and then is emulsified, and whether the explosive meets the standard can be judged by detecting the density and the detonation velocity of the emulsion explosive. In this comparative example, the density reached 1.25g/cm3 and the detonation velocity reached 4000 m/s.
The steps (3) and (4) can be completed in the on-site explosive mixing vehicle.
The field mixed loading step specifically comprises the following steps:
if the solution in the storage tank is not used up within 5 hours, before the next medication,
re-adjusting the temperature and the pH value, and adding a proper amount of nitric acid to adjust the pH value to 3.9 in time when the pH value is higher according to a test;
if the prepared aqueous phase solution exceeds 5 hours, the thiourea is additionally added according to 4 percent of the original proportion;
if the prepared aqueous phase solution does not exceed 5 hours, the thiourea is added in a supplementary manner according to 2 percent of the original proportion;
the sensitizer is prepared according to the proportion of 1:4.5, namely 1 part of sodium nitrite is added with 4.5 parts of water to be mixed evenly.
Comparative example 2:
the existing emulsion explosive for high-sulfur mining areas mainly comprises the following components: 75% by weight of ammonium nitrate, 0.091% by weight of thiourea, 0.033% by weight of nitric acid, 2.73% by weight of urea, 2.77% by weight of diesel oil, 1.85% by weight of engine oil, 1.38% by weight of emulsifier (Span-80, i.e. sorbitan oleate), and the balance of water.
The density of the emulsion explosive of this comparative example was 1.12g/cm 3.
The method for preparing the emulsion explosive in the high-sulfur mining area comprises the following steps:
(1) and preparing an aqueous phase solution: firstly crushing ammonium nitrate to form an ammonium nitrate aqueous solution, simultaneously dissolving the ammonium nitrate aqueous solution, thiourea, urea and nitric acid in hot water at the temperature of 80 ℃, adjusting the pH value of the solution to be 3.9, and storing the aqueous phase solution at the temperature of 78 ℃; (2) preparing an oil phase: heating the oil phase to 45 ℃ through a special storage tank and a steam coil type heat exchanger; (3) and an emulsification step: conveying the water phase and the oil phase obtained in the steps (1) and (2) to a field mixed emulsion explosive truck for storage, wherein the stirring speed in the emulsifier is 850 revolutions per minute; (4) and field mixed loading: and (4) mixing the latex matrix obtained in the step (3) with additives such as sodium nitrite and the like to obtain the special emulsion explosive for the high-sulfur ore area.
In the step (3), the water phase and the oil phase are emulsified in a vehicle-mounted emulsifier in a ratio of 96% to 4% to form an emulsion matrix, and the emulsion explosive is sensitized and then is emulsified, and whether the explosive meets the standard can be judged by detecting the density and the detonation velocity of the emulsion explosive. In this comparative example, the density reached 1.12g/cm3 and the detonation velocity reached 3800 m/s.
The steps (3) and (4) can be completed in the on-site explosive mixing vehicle.
The field mixed loading step specifically comprises the following steps:
if the solution in the storage tank is not used up within 5 hours, before the next medication,
re-adjusting the temperature and the pH value, and adding a proper amount of nitric acid to adjust the pH value to 3.8 in time when the pH value is higher according to a test;
if the prepared aqueous phase solution exceeds 5 hours, the thiourea is additionally added according to 4 percent of the original proportion;
if the prepared aqueous phase solution does not exceed 5 hours, the thiourea is added in a supplementary manner according to 2 percent of the original proportion;
the sensitizer is prepared according to the proportion of 1:4.0, namely 1 part of sodium nitrite is added with 4.0 parts of water to be mixed evenly.
The surface density and the detonation velocity of the emulsion explosive on the surface of the ground in the table 2 are measured according to the industry standard MT 932 + 2005 determination of the density, moisture and sympathetic detonation distance of the industrial explosive and the national standard GB 13228 + 2015 determination method of the detonation velocity of the industrial explosive.
TABLE 2 comparison data table of performance of the present invention and the existing high sulfur content emulsion explosive for mining
Claims (9)
1. The high-sulfur-content mining emulsion explosive is characterized by comprising
Water phase components: 73-75% by weight of ammonium nitrate, 2.50-3.00% by weight of thiourea and 0.030-0.035% by weight of nitric acid;
oil phase components: 2.50-3.00% of diesel oil, 1.50-2.00% of engine oil and 1.00-1.50% of emulsifier;
sensitizing components: 0.010-0.015% by weight of sodium nitrite;
the balance of water.
2. The mining emulsion explosive with high sulfur content according to claim 1, characterized in that the kinematic viscosity of the engine oil is 10.5-14.5 mm at 100 ℃ 2 And/s, the flash point is not lower than 160 ℃.
3. A method for preparing the high-sulfur-content mining emulsion explosive according to claim 1 or 2, which is characterized by comprising the following steps of: the method comprises the following steps:
preparation of aqueous phase solution: firstly crushing ammonium nitrate to form an ammonium nitrate aqueous solution, simultaneously dissolving the ammonium nitrate aqueous solution, thiourea and nitric acid in hot water at the temperature of 76-85 ℃, adjusting the pH value of the solution to 3.8-4.0, and storing the aqueous phase solution at the temperature of 75-82 ℃;
preparing an oil phase: heating the oil phase to 40-50 ℃ through a special storage tank and a steam coil type heat exchanger;
an emulsification step: conveying the water phase and the oil phase obtained in the water phase solution preparation step and the oil phase preparation step to a field mixed emulsion explosive truck for storage, and stirring the mixture in an emulsifier at a rotating speed of 750-1000 rpm to obtain an emulsion matrix;
mixing and loading on site: and mixing the emulsion matrix obtained in the emulsification step with a sodium nitrite additive to obtain the special emulsion explosive for the high-sulfur-content ore.
4. The method according to claim 3, wherein the aqueous phase solution preparing step further comprises the steps of:
the method is characterized in that the crystallization point of the water phase is required to be adjusted to be 56-60 ℃, the pH value is 3.8-4.0, the temperature is 75-82 ℃, the water phase is used immediately after being adjusted, the water phase is ensured to be used up within 72-96H after being adjusted, the amount of thiourea added is 2.50-3.00% in 72-96H, and the time H for correspondingly using up the water phase can be longer when the thiourea is less added.
5. The process according to claim 4, characterized in that said time to empty the aqueous phase, Hhours, is related to an empirical value between 2.50% and 3.00% of the percentage by weight a% of said thiourea added.
6. The method according to claim 3, characterized in that said oil phase preparation step further comprises the steps of:
sequentially adding the diesel oil, the emulsifier and the engine oil into an oil phase preparation tank in a corresponding order, fully and uniformly stirring, and filtering to pump into an oil phase storage tank.
7. The method according to any one of claims 2-6, wherein said on-site mixing step further comprises the steps of:
if the solution in the storage tank is not used up for 72-96 h, before the next medicine dispensing,
re-adjusting the temperature and the pH value, and adding a proper amount of nitric acid to adjust the pH value to 3.8-4.0 in time when the pH value is higher according to a test;
if the prepared aqueous phase solution exceeds 72 hours, the thiourea is added in a supplementary manner according to 3 to 4 percent of the original proportion;
if the prepared aqueous phase solution does not exceed 72 hours, the thiourea is added in a supplementary manner according to 1.5-2% of the original proportion;
the sensitizer is prepared by mixing 1 part of sodium nitrite and 3.5-4.5 parts of water according to the proportion of 1 (3.5-4.5).
8. The method according to claim 3 or 4, wherein in the emulsifying step, the water phase and the oil phase are emulsified in a vehicle-mounted emulsifier in a weight ratio of 92-96% to 4-8% to form an emulsion matrix, the emulsion matrix is sensitized to form the emulsion explosive, and whether the emulsion explosive meets the standard or not is judged by detecting the density and the detonation velocity of the emulsion explosive.
9. The method according to claim 8, wherein the specific indexes for judging whether the explosive meets the standard are as follows: the density reaches 1.00 to 1.30g/cm 3 The detonation velocity reaches more than 4000 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210474226.XA CN114853553B (en) | 2022-04-29 | 2022-04-29 | High sulfur content emulsion explosive for mine and production process method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210474226.XA CN114853553B (en) | 2022-04-29 | 2022-04-29 | High sulfur content emulsion explosive for mine and production process method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114853553A true CN114853553A (en) | 2022-08-05 |
| CN114853553B CN114853553B (en) | 2024-05-14 |
Family
ID=82634916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210474226.XA Active CN114853553B (en) | 2022-04-29 | 2022-04-29 | High sulfur content emulsion explosive for mine and production process method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114853553B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4992118A (en) * | 1989-03-04 | 1991-02-12 | Gansu Research Institution Of Chemical Industry | Chemically foamed emulsion explosive composition and process for its preparation |
| CN101445417A (en) * | 2008-12-30 | 2009-06-03 | 本钢板材股份有限公司 | Composition for manufacturing emulsion explosives |
| CN109704895A (en) * | 2017-10-25 | 2019-05-03 | 廖书辉 | A kind of bulk emulsifying explosive and preparation method thereof |
| CN110437020A (en) * | 2019-08-06 | 2019-11-12 | 北京奥信化工科技发展有限责任公司 | Suitable for the opencut emulsion matrix remotely dispensed and the emulsion made of it |
| RU2019122572A (en) * | 2019-07-18 | 2021-03-17 | Общество с ограниченной ответственностью "СпецРешения" | EMULSION EXPLOSIVE COMPOSITION AND METHOD FOR ITS PRODUCTION |
-
2022
- 2022-04-29 CN CN202210474226.XA patent/CN114853553B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4992118A (en) * | 1989-03-04 | 1991-02-12 | Gansu Research Institution Of Chemical Industry | Chemically foamed emulsion explosive composition and process for its preparation |
| CN101445417A (en) * | 2008-12-30 | 2009-06-03 | 本钢板材股份有限公司 | Composition for manufacturing emulsion explosives |
| CN109704895A (en) * | 2017-10-25 | 2019-05-03 | 廖书辉 | A kind of bulk emulsifying explosive and preparation method thereof |
| RU2019122572A (en) * | 2019-07-18 | 2021-03-17 | Общество с ограниченной ответственностью "СпецРешения" | EMULSION EXPLOSIVE COMPOSITION AND METHOD FOR ITS PRODUCTION |
| CN110437020A (en) * | 2019-08-06 | 2019-11-12 | 北京奥信化工科技发展有限责任公司 | Suitable for the opencut emulsion matrix remotely dispensed and the emulsion made of it |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114853553B (en) | 2024-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2016216720A1 (en) | An explosive composition and a method of making an explosive composition | |
| US9879965B2 (en) | Explosive composition manufacturing and delivery platform, and blasting method | |
| CN102001901B (en) | Method for manufacturing allowable emulsion explosive for coal mine | |
| CN102997767B (en) | Field emulsion explosive mixing and charging system and charging method suitable for underground engineering | |
| CN101475423A (en) | High performance on-site mixed emulsified explosive | |
| CN106916042B (en) | A kind of package-type emulsifying ammonium nitrate fuel explosive and preparation method thereof | |
| CN104109058A (en) | Method for manufacturing on-site mixed emulsion explosive | |
| AU2019254452C1 (en) | Procedure and installation for loading boreholes with bulk water-based suspension or watergel type explosives | |
| CN111253198A (en) | Formula and production process of detonator-free sensitivity emulsified granular ammonium nitrate fuel oil explosive | |
| CN105712809B (en) | Heat-sensitized emulsion and preparation method thereof | |
| CN114853553A (en) | High-sulfur-content mining emulsion explosive and production process method thereof | |
| EP1002777B1 (en) | Process and mechanism for in situ sensitization of aqueous explosives | |
| CN106946636B (en) | A kind of emulsification ANFO explosives prill and its continuous production technology | |
| US3642547A (en) | Method of controlling density in gas-sensitized aqueous explosives | |
| CN111848314A (en) | Packaged heavy ammonium nitrate fuel oil explosive and preparation method thereof | |
| CA2381121C (en) | Procedure and installation for on-site manufacturing of explosives made from a water based oxidizing product | |
| CN112479794A (en) | High-performance emulsified granular ammonium nitrate fuel oil explosive and preparation method thereof | |
| CN109879710A (en) | Compounding oil phase and on-site mixed explosive, preparation method for explosive emulsion matrix | |
| CN103159576B (en) | Low-viscosity pumpable emulsion explosive substrate and preparation method thereof | |
| CN112876326A (en) | Mixed emulsion explosive and application thereof | |
| CN102491860A (en) | On-site mixed and expanded ammonium nitrate explosive and production method thereof | |
| RU2277523C2 (en) | Emulsion explosive composition and the method of its production | |
| US6855219B2 (en) | Method of gassing emulsion explosives and explosives produced thereby | |
| CN110078577A (en) | A kind of universal emulsion and preparation method thereof and application method | |
| CN102675012A (en) | Process flow of producing explosive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |