River Gravel Sand Making Machine
Broken raw particle composition, stone, strength, and collection method determines the selection of crushing equipment and crushing process. To this end, river pebbles in the river for detailed investigation and analysis, found that works along the river to a large number of river pebbles. Longitudinal larger lots river, river gravel diameter is too large, the majority of the more than 500mm; river longitudinal diameter smaller lots small river pebbles, river pebbles diameter 50 ~ 500mm content above 60%, more easily collected. Particle consists of: 5 ~ 50 mm diameter gravel accounted for 5% to 10% of the total size of 50 ~ 500mm gravel accounted for 60% to 70%, more than 500mm diameter pebbles accounted for 20% to 30%. River pebble stone: The survey examined more than 98% of river gravel hard limestone cores, while a very small amount of quartz stone. In the vast majority of river pebbles strength 150MPa or more. River pebbles sorting measures and methods: natural river bed gravel particle sizes within a diameter of 500mm above river gravel accounted for 20% to 30% of the total, in order to reduce the crushing difficulty and expense, after a comprehensive analysis to determine the comparative diameter of 500mm above the river pebbles removed. Excluding methods are: 1) a particularly large (diameter 800mm above the river pebbles) by the excavator in the river gravel excavator digging turned aside direct removal; 2) For diameter 500 ~ 800mm river gravel, take the field digging pile method, large heap of stones rolls side, then remove excavators; 3) for diameter 350 ~ 500mm river pebbles, use welded steel grate in the triangle dump truck container screening method. Considering the ease of acquisition, the distance from the broken field, particle size, and other factors can be mined to determine the paragraphs quarry. After determining quarries were mined within the quarry can investigate further excavation calculated to ensure exploitation to meet the demand.
Considering that the project required gravel 84,000 m³, sand 58000 m³, feed from the outside more difficult (and into the sand from outside their prices higher than gravel), the use of gravel joint production line, while the production of sand and gravel. Gravel production process according to requirements of each period, adjusted gravel output ratio, in order to meet the construction needs. The main crushing process to a coarse material on the forklift broke a broke a fine sieve to wash the sand of a discharge.
According to the project schedule, the 8.4 +5.8 = 142,000 m³. As long as sand and gravel in the five months to complete, you can meet the schedule needs. The middle of a road construction Pass, Pass Pass traffic on both sides need to wait until the completion of the main project, that project through to late at Yakou haul vehicles. Taking into account the characteristics of the project, in the proper position on both sides of the Pass, each with a set of crushing equipment. Taking into account the installation takes about 40d, the actual breaking time of only 3.5 months, a month to consider the effective working time 25d, the average daily operating time of 12h, need-hour production was 14.2 × 10000 ÷ [(25 × 3 +1 5) × 1 2 × 2] = 65.7 m³ / h.According to the model and crushing equipment production, the choice of hourly 100t (65.7m ³) combined processing capacity of sand and gravel production line 2 sets. In addition, considering the great river pebbles hardness, crushing efficiency is relatively low, the choice of classification crushing production line, which is to use the coarse broken jaw crusher, impact crusher fine then broken and shaping.
1) high hardness can be broken river pebbles, local pressure, thickness jaw, jaw teeth span, large crushing moment, narrow and deep jaws PE series; 2) production of 100t / h, that is not less than the combined production line integrated production; 3) the maximum feed particle size of about 500mm. Under these conditions, the final selection of the PE-600 × 900 jaw crusher, the crusher capacity of 50-160t / h, maximum feed particle size of 500mm, discharge diameter of 65 ~ 160 mm, motor power 75kw, can satisfy the above conditions.
1) high strength can be broken river pebbles; 2) as the ultimate crushing, gravel grain shape to meet the relevant specifications for highway projects aggregate quality requirements, broken gravel strip, sheet can be controlled at a lower content within; 3) easy to change wear parts, wear; 4) production at 100t / h or more. Under these conditions, the selected crusher PF-1214, which the inlet size of 1440mm × 465mm, maximum feed size is, 350mm, production capacity of 100-160t / h, power 132k W.