Cost of blasting

Cost of blasting caps and fuses and cost of labor for fitting cartridges with them... 

Nobel intended dynamite to be used as a construction tool. It was more powerful than gunpowder—the most common explosive used in construction at the time. Indeed, dynamite helped reduce the cost of blasting rocks, which is essential for building tunnels and canals. However, military leaders were also interested in Nobel s discovery. 

The largest use for calcium carbide is in the production of acetylene for oxyacetylene welding and cutting. Companies producing compressed acetylene gas are located neat user plants to minimize freight costs on the gas cylinders. Some acetylene from carbide continues to compete with acetylene from petrochemical sources on a small scale. In Canada and other countries the production of calcium cyanamide from calcium carbide continues. More recentiy calcium carbide has found increased use as a desulfurizing reagent of blast-furnace metal for the production of steel and low sulfur nodular cast iron. 

Note 4 Surface preparation for painting is often analysed separately as it may typically form one-third of the total cost. Poor surface preparation can more than halve the life expectancy of a coating (and add over 100% to the total life cost) but save less than 20% of the total capital cost. Correct choice of blasting equipment (e.g. nozzle size, grade of abrasive) can save up to half the surface preparation cost. 

The rising cost of scrap and waste disposal, the scarcity of onsite landfill space, and potential environmental liabilities make it an economic necessity to recover iron units from dust and sludge. However, recycling to the blast furnace raises the hot metal phosphorus content to undesirable levels. 

Upgrade to the existing facility depends on the increase in blast capacity required. Level of blast protection is generally based on building category, function, risk level and blast loads. Structural assessment and cost evaluation are then made to determine the best alternative to use. 

The vendor states that the most notable operating costs of CO2 blasting are associated with providing the compressed air and dry ice. Costs for dry ice average about 0.25/lb for both... 

If blasting is done by means of electric caps, the cost of such caps as well as wiring and of hlasting machines... 

Cost of labor for loading the cartridges into boreholes, tamping and blasting... 

Removal of blasted materials (such as ore, coal, rocks, etc) and loading for transporting to places of storing. Cost of transportation and storing... 

The relative importance of these factors can change considerably over time. For example, while "wet" stripping using aqueous solutions has been standard in the industry for many years, the high costs of sludge disposal, as well as the liability, have caused some shops to phase out aqueous stripping in favor of "dry" methods such as sand or bead blasting. 

It is obvious that inclusion of blasting agents (ANFO) in the tagging program greatly increases program costs... 

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