The calculation of the sampling is one of the important contents of the sampling design. The specific sampling points and the distribution of the sampling weight of each sampling point are all calculated by the matching calculation. There are two methods for matching calculations: repeated increase and decrease calculation and optimized sample calculation. The general procedure for the repeated increase and decrease of the calculation method is as follows: (1) Determine the number of taken ore samples. According to the requirements of the ore dressing test on the number of test ore samples, the number of mined samples is determined. (2) Determine the weight of the mined sample. According to the weight of the test ore sample required by the beneficiation test, and considering the amount of shipment required for the loss of the shipment, the processing and consumption of the processing, and the final sample and shrinkage requirements, the weight of the ore sample is determined. Table 1 K value of various ores
Ore type | K value | Ore type | K value | Ore type | K value |
Ore iron ore (Hu uniform distribution) of manganese ore copper chromite ore Ni ore (sulfide ore) Ni ore (silicates) cobalt molybdenum ore lead ore, zinc ores mercury antimony ore ores of tungsten ores and gold-tin ores (particles < 0.1mm) | 0.1-0.2 0.05 0.1-0.2 <(0.25-0.3) 0.1-0.5 0.2-0.5 0.1-0.3 0.2-0.5 0.1-0.5 0.2 >(0.1-0.2) >(0.1-0.2) 0.1-0.5 0.2 0.2 | Gold (particles <0.6mm) gold (particles> 0.6mm) rare earth ore of tantalum, niobium ore zirconium, lithium, beryllium, cesium, rubidium, scandium ore mining phosphate rock sulfur natural magnesite dolomite limestone and sulfur, boron ore fluorite kaolin clay mine | 0.4 0.8-1.0 0.2 0.2 0.2 0.1-0.2 0.1-0.2 0.05-0.3 0.2 0.05-0.1 0.05-0.1 0.05-0.1 0.1-0.2 0.1-0.2 0.1-0.2 | Bauxite bauxite (non-uniform) Talc graphite mine ore alum gypsum mine barite ore arsenic (homogeneous) barite (non-uniform) chrysotile quartz feldspar mineral salts (homogeneous) ore | 0.1-0.3 0.3-0.5 0.1-0.2 0.1-0.2 0.2 0.2 0.2 0.1 0.2-0.5 0.1-0.2 0.2 0.1-0.2 0.1-0.2 0.1-0.2 |
Component grade % | Allowable fluctuation range, ± | Component grade % | Allowable fluctuation range, ± |
>45 30-45 20-30 15-20 10-15 5-10 | 1.00 1.00 1.00 1.00 0.50 0.50 | 1-5 0.5-1 0.1-0.5 0.05-0.1 0.01-0.5 <0.01 | 0.20 0.10 0.02-0.05 0.01 0.002-0.005 0.001 |
A gas heaters is a space heater used to heat a room or outdoor area by burning natural gas, liquefied petroleum gas, propane or butane . Indoor gas heaters can be broadly categorized in flued or non-flued, or vented and unvented.
we focus on wall gas heater, portable gas heater. Natural gas heater provide clean, efficient heat on cold winter. Natural gas heaters can be wall-mounted or freestanding units to suit the rooms. Ventless heaters:Ventless gas heaters, also called vent-free or no-vent heaters.
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