Crushing And Screening Plant For High-Grade Aggregate

Special engineering aggregate production:

highway/high-grade highway surface layer material, high-speed railway passenger line sand and stone aggregate, hydropower station concrete dam sand and stone material, port terminal and airport runway special gravel material, etc.

Hard rock processing scene: crushing, shaping and grading of hard/medium-hard rocks such as basalt, pyroxene, granite, anzanite and limestone.

Flexible adaptation of multiple working conditions:

It can quickly adjust the specifications of finished products according to the construction progress and order needs, adapt to the aggregate supply needs of different engineering stages, and realise front-line multi-use.

Product Maintenance:

1. Daily maintenance: clean up the residual materials of the feed port, discharge port and screen of each equipment to prevent blockage; check the fastening of all connecting bolts and tighten them in time; check the oil level of the lubricating system and supplement the suitable model of lubricating oil; troubleshoot the abnormal noise and vibration during the operation of the equipment, and stop immediately if the problem is found.
2. Regular maintenance: check the operating status of the motor, reducer and vibrating feeder every week, clean up the surface dust, and check the line insulation; check the wear of the jaw-breaking lining plate, the cone-breaking mortar wall/crushed wall, VSI impact-breaking impeller and other wear parts every month, and repair or replace it in time; check the vibrating screen spring and sieve tension Degree, adjust the elasticity of the transmission parts (belt, gear).
3. Long-term downtime maintenance: thoroughly clean up the residual materials inside and outside the equipment, empty the grease of the lubrication system; do a good job of dustproof, moisture-proof and rust-proof treatment of the equipment, and store it in a dry and ventilated place; before re-use, comprehensively check the status of each component, add new lubricating oil and test operation without load, and confirm that there is no abnormality before it can be put into production.
4. Safety taboos: The power supply of the equipment must be cut off before overhaul, and energised operation is strictly prohibited; it is forbidden to use lubricating oil and consumable parts adapted from the original factory; it is strictly forbidden to open the protective device or carry out cleaning and adjustment operations during the operation of the equipment.

Application scenario:

This set of PE jaw breaking + HC cone + VSI vertical shaft impact breaking double closed-circuit composite production line is specially designed for high-hardness ore. One production line simultaneously produces multi-specification crushed stone aggregates and boutique mechanism sand, with a high degree of automation, high raw material utilisation rate, low wear resistance, and widely adapts to the following six scenarios. :

(1) Large-scale open-pit hard rock mine mining project is suitable for the large-scale processing of high-hardness raw stones such as granite, basalt, river pebbles, etc., and the double closed-circuit circulation ensures the continuous production of large-capacity capacity. It is a standard complete production line for thousand-ton large-scale open-pit sand and stone mines, with low wear-resistant parts loss and outstanding long-term mass production cost advantages.

(2) Supply of high-standard infrastructure aggregates for high-speed, railways and water conservancy. The proportion of crushed stone cubes is high, the needle-like content is low, and the supporting VSI production of fine mechanism sand. The finished products fully meet the high-standard material standards of highways, bridges, tunnels and water conservancy projects, which is suitable for stable supply of large-scale infrastructure projects.

(3) Commercial concrete and dry powder mortar supporting sand and stone factory. A set of production lines supplies crushed stone aggregates and high-clean fine mechanical sand at the same time. The mechanical sand particles are round and the grading is excellent, which adapts to the raw material needs of mixing stations, dry powder mortar factories and prefabricated component factories. A single factory area can cover two types of customer orders and improve site income.

(4) Metal ore beneficiation pretreatment production line is used for two-stage and three-stage crushing of iron ore, copper ore, manganese ore and other metal ores. HC cones accurately control the grinding particle size, improve the subsequent grinding and beneficiation efficiency, and adapt to the raw material pretreatment process of large and medium-sized beneficiation plants.

(5) Resource utilisation of industrial solid waste and stone edge materials can process stone underfoot material, mine tailings and hard construction waste. After crushing and making sand, qualified recycled aggregates can be produced to realise waste resource recycling and adapt to environmental protection regeneration and comprehensive utilisation projects of tailings.

(6) Overseas large-scale mine general contractor, regional agent complete set of projects. The production line is an international general standardised hard rock production plan. The equipment is universal, the accessories are always in stock, and the operation and maintenance are simple. It is suitable for the harsh working conditions of mines around the world. It is suitable for overseas engineering general contractors, sand and stone equipment agents, and long-term landing project cooperation.

FAQ：

Q：What is the complete material flow of this composite production line?

A：The whole production line is divided into aggregate coarse crushing medium crushing cycle and fine sand making shaping double closed-circuit process:

• Crude aggregate circuit: ZSW vibrating feeder → PE/PEX jaw crusher → part of the standard material directly comes out of the finished product; unqualified materials are sent to HC cone crusher through GZG vibrating feeder; cone crushing materials flow back to YK/YZ circular vibrating screen;
• Sand-making closed-circuit loop: YK/YZ circular vibrating sieve separates super-large particles and sends them into VSI vertical impact crushing mechanism sand shaping; VSI discharges into the second YK/YZ circular vibrating sieve fine screening, and the crude material returns to VSI secondary sand making, and a variety of standard sand and stone branching outputs finished products. The whole line is designed with double cycle, and crushed stone aggregates and fine mechanical sand are produced simultaneously.

Q：What are the advantages of double closed-circuit circulation technology compared with single-section crushing line?

A：First, the raw material utilisation rate is close to 100%, and all unqualified materials are repeatedly crushed, and there is no waste waste; Second, the grading is more refined, and a variety of specifications of crushed stone + boutique mechanism sand can be produced at the same time; Third, the equipment load is balanced, coarse crushing, medium crushing and sandmaking division of labour is clear, the whole machine wear is lower, the failure rate is less, and long-term production The cost of operation and maintenance is lower.

Q：How many kinds of finished materials can be produced in the whole production line?

A：It can simultaneously produce multi-specification gravel aggregates (5-10mm, 10-20mm, 20-30mm, etc.) + fine artificial mechanism sand. A production line can simultaneously supply crushed stone material fields and commodity mixing stations, which can meet the needs of a variety of engineering materials in one stop.

Q：How stable is the operation of this production line? Can it operate continuously 24 hours a day for a long time?

A：The load matching of each equipment is reasonable, and the front pre-screening reduces impurities entering the host; HC cone is equipped with intelligent iron protection, VSI structure is wear-resistant and impact-resistant, the double feeder controls the flow smoothly, the loss of the consumable parts of the whole set of equipment is uniform, and the frequency of downtime and maintenance is low, which is suitable for continuous production of large mines around the clock.

Q：Can this composite production line be customised according to the customer’s site and production capacity?

A：Support full-dimensional customisation, which can adjust the equipment model, the number of screening layers, supporting dust removal/sand washing equipment according to the raw stone hardness, time output, site area and environmental protection requirements, and issue a complete set of plans for flat layout, process flow and foundation construction free of charge.

Q：Is the export packaging of equipment suitable for ocean shipping?

A：All equipment is modularly packaged separately, and the whole machine is professional for rust removal and rust prevention, waterproof winding protection, and the motor and wear-resistant accessories are packaged in wooden boxes for independent export; a full set of customs clearance documents, packing real shots, and loading videos can be provided to ensure the safety of sea transportation throughout the whole process.