CDP explosives are combinations of dry ice (frozen carbon dioxide), and powdered magnesium or aluminum. The formulations are easy to prepare, totally non-toxic, safer than any traditional explosive, and they are detonator-sensitive, nitrogen-free, and detonate with tremendous force.
To blast with CDP, clients can purchase a CDP Blaster system, which requires a tank of compressed CO2 (with an internal syphon) to make dry ice, and powdered metal. The preferred metals to use with CDP are magnesium or an alloy of magnesium/aluminum. Detonation byproducts are non-toxic and mainly a combination of non-toxic metal oxides of the metal used in the formulation.
The system above can easily mix batches up to 10 kg (20 lb). Larger systems are available and can be custom built.
CDP mixtures are powdered, very cold, they pack easily and can be customized to produce a wide range of blasting effects by varying the amount of metal in the mixture.
Please contact EnviroDiamond to provide your powdered metal and carbon dioxide.
Features of CDP Explosives
Feature #1: CDP explosives are detonatable across a range of metal concentrations, and each exhibits a unique VOD and solids yield. This permits customers to prepare shots that deliver the perfect combination of energy, solids and gas necessary for a specific blasting objective.
One such objective is for blasting rock containing veins of high-grade ore. Rather than obliterate the rock with energetically inefficient high velocity explosives, the customer can use CDP. CDP can be customized, on site and with perfect ease, to deliver the ideal blend of explosive forces, solids and gas to produce rocks of a size that reduces mineral processing costs.
Mineral processing costs are reduced by creating rocks of a size that are statistically more likely to contain the highest purity of the high-grade ore in question. Through simple techniques, the chunks of high-grade ore can be concentrated and subjected to a more efficient mineral extraction process due to less waste per tonne of ore.
Feature #2: The power of CDP slowly wanes over time as the dry ice portion sublimates. This built-in safety feature means CDP explosives can be quarantined, in the case of a misfire for example, until the dry ice is gone and then the metal can be recovered (12 – 24 hours).
This feature requires the customer to plan their shots with as low a delay as possible between loading holes and shooting them (sleep time < 2 hours ideally; ASAP is best). Longer sleep times are possible under the right insulation strategy and depending on the type of the rock.
Feature #3: The ingredients of CDP explosives are non-toxic and do not accumulate in workers from repeated exposure. By comparison, all conventional explosives present serious potential health risks (including cancer) in their manufacture, handling, and use.
Feature #4: Using CDP can eliminate a mine’s need for explosives magazines except for one, for detonators only. The cost to insure an operation without stocked explosives magazines would likely be lower.
Feature #5: CDP is completely safe to prepare, handle and use. Substantial testing has shown that CDP formulation is safe against accidental detonation or fire induced by electric discharge, open flame, sparks, exposure to water, significant impact and extreme compaction.
By comparison, traditional explosives are a constant liability and at risk from fire, sparks, impact, overheating, improper storage and theft. Completely eliminating all traditional explosives from inventory would increase operating safety, improve workers’ health and safety, and potentially reduce insurance costs.
Classification of CDP as an Explosive
The Canadian government has ruled that CDP may be prepared without a manufacturing license. Despite CDP exhibiting detonator sensitivity, CDP has not been deemed necessary to be classified as an explosive by Canada’s Explosives Regulatory Division (ERD).
ERD’s position on CDP has been reasoned to be based on CDP having a short window of utility when compared to traditional products, which can be stored for years. A short window of utility prohibits the traditional purchase and storage of CDP as an explosive product, which presents difficulty to the task of regulating CDP as an explosive product.