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In the fast-developing modern construction industry, sand and gravel aggregates, as the cornerstone of infrastructure construction, are in increasing demand. Mechanism sand, as an effective supplement to natural sand resources, is favoured for its controllable quality and wide range of sources. The choice of mechanism sand production line is directly related to many aspects such as production efficiency, cost control and environmental adaptability. In this paper, the advantages and disadvantages of fixed and mobile mechanism sand production line will be discussed in depth to provide comprehensive reference for investors and decision makers.
1 Overview
Fixed production lines are production lines that are established at a fixed location and usually require extensive civil engineering work, such as foundation construction and plant erection. This type of production line is suitable for large-scale, long-term stable production environment.
A mobile line is a line that can be quickly moved to different locations depending on production requirements, and usually consists of a number of independently movable units. This type of line is ideally suited to situations where there is a need for frequent changes of location or where the project cycle time is short.
2 Basis for selection
1. From the point of view of applicable scenarios, the stationary production line is more suitable for large-scale engineering projects with stable raw material sources, large production volume and long production cycle. For example, infrastructure construction such as highways, railways, bridges, etc., these projects have huge demand for sand and gravel materials and strict requirements on quality, and the stationary production line can meet these demands. Comparatively speaking, the mobile production line is more suitable for small or medium-sized projects, or uneven distribution of raw materials, geographically remote areas. Urban reconstruction projects, small residential area construction and so on can benefit from the mobile production line.
2. Analysed from the perspective of cost-effectiveness, the stationary production line, despite its large initial investment, has lower production costs in the long term and is suitable for long-term large-scale production. According to statistics, the operating cost of a fixed production line is about 60 to 70 per cent of that of a mobile one. Mobile production lines, on the other hand, although they have an advantage in terms of initial set-up costs, may not be economical in the long term because of the higher costs of transport and equipment maintenance.
3. In an actual case, a large State-owned enterprise chose a stationary mechanism sand production line to support its long-term infrastructure project. By centralising the procurement of high-efficiency equipment and optimising the production process, the project not only ensured production volume and product quality, but also effectively reduced long-term production costs. On the other hand, a company specialising in urban renewal projects has adopted a mobile production line. This enabled them to respond quickly to changes in project locations, and although production costs were higher for individual projects, overall better allocation of resources and cost savings were realised.
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The user purchased two sets of sand production line, each set of equipment includes ZSW490*110 vibrating feeder, PE750*1060 jaw crusher, HST250 single-cylinder cone crusher, JYS1238 sand making machine, YK2460 vibrating screen, 3016 sand washer and so on.
The designed capacity of this sand making project is 200t/h, and the equipment used includes 490*110 vibrating feeder, PE750*1060 jaw crusher, PF1315 impact crusher, 9928 sand making machine, two sets of 2460 vibrating screen, two sets of 920 single screw sand washer, two sets of XSD2816 sand washer, two sets of dewatering screen, and several belt conveyors.
Project configuration: Jaw Crusher PE900*1200, Cone Crusher HST315T, Vertical Shaft Impact Crusher VSI6X1263, Heavy Duty Vibrating Screen 2YKZ3080/3YKZ3080, Vibrating Feeder ZG1220Z/ZSW1360, Twin Screw Sand Washer 2XL1120, Bar Vibrating Feeder ZSW1360B, Bucket Wheel Sand Washing Machine DS4024, dewatering screen TS2450 many types of equipment. They will work together with the whole production line to crush and process the sand trap cobbles and mountain ores into natural sand, mechanism sand, and uniform material.
The finished products of the project are used for high-speed railway construction and neighbouring construction materials, which will strongly promote the local economic development. In the future, Jianye Heavy Industry Company will continue to give full play to its years of practical experience in the sand and gravel aggregate, construction waste resource reuse, industrial powder making, silica sand and other industries, as well as EPC one-stop turnkey services, to cooperate with customers and jointly promote the high-quality, healthy and sustainable development of the sand and gravel industry.
Jiangsu Rugao Calcium Powder Factory purchased two sets of Jianye 4121 high-pressure mills for the production of heavy calcium powder, which is mainly used in the filler industry and coating industry, and now it also maintains a close cooperation relationship with Jianye, and every year Jianye sends technicians or sales managers to visit the user.
The user uses calcined petroleum coke to grind and make powder, and the finished coke powder is mainly used for processing graphite electrodes. In recent years, the price of coke powder rises, the user spends tens of millions of dollars to build a production line with an annual output of 60,000-100,000 tonnes of high-quality coke powder, which is the first phase of the project, using two sets of 6R4528 high-pressure grinding mills of Jianye Company.
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