Several problems need to be determined when setting up a concrete mixing plant
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With the rapid growth of China's construction industry, commercial concrete mixing stations have become increasingly common in prefecture-level cities along the coastal regions, while smaller and medium-sized stations are now being established in county and city areas. Drawing from the experience of Huazhong Construction Machinery technicians in product design, on-site installation, commissioning, and testing of commercial concrete mixing plants, this article analyzes key technical challenges in the setup and operation of these facilities, aiming to provide valuable insights for professionals in the same field.
1. Determining the Scale of the Mixing Station
Before deciding on the investment scale, it is crucial for investors to conduct thorough market research. If the station is intended for internal use by a construction company, the production capacity should be determined based on the building construction volume and the expected usage of ready-mix concrete. This ensures that the plant meets the actual demand without over-investing in unnecessary capacity.
2. Determining the Grade of the Mixing Station
Investors should thoroughly assess the quality, service capabilities, and pricing of manufacturers both domestically and internationally. Conducting site visits to evaluate production and quality assurance processes can help identify reliable suppliers. Meetings such as defense or bidding sessions can aid in selecting the most suitable equipment manufacturer. Depending on available funds, the scale and grade of the mixing plant can be adjusted. For smaller investments, using fully domestically produced components with cost-effective main units is a practical choice. For larger projects, key components like Toledo sensors, Weim screw conveyors, dust collectors, and cement silos can be selected to enhance reliability, longevity, and overall efficiency.
The electrical control system also plays a vital role in determining the station’s grade, as different manufacturers offer varying levels of automation and control options.
3. Selecting the Site for the Mixing Station
When choosing a location, it is important to ensure proximity to gravel and sand yards, adequate water supply, and a safe distance from residential areas. Utilizing hillside topography can optimize storage space by placing the stockyard on higher ground, reducing the feeding height for the batching machine and minimizing the need for steep inclines. This not only saves energy but also reduces wear and tear on equipment. Care must also be taken to avoid existing underground cables, power lines, or communication lines during installation.
4. Choosing the Aggregate Conveyor Belt System
If the site allows, a flat belt conveyor with a small angle (around 18°) is preferred to reduce equipment costs, or alternatively, a lifting hopper system can be used. In confined spaces, a high-angle ribbed belt conveyor (typically 40°–50°, and up to 90° with special structures) may be necessary. However, in wet environments, high-angle ribbed belts can suffer from sand adhesion, leading to more sand accumulation when the belt returns. Therefore, the moisture content of sand and its utilization factor should be carefully considered in the mix design.
5. Selecting the Aggregate Batching Machine
A complete commercial concrete mixing plant typically uses one scale for aggregate measurement, or two to four separate scales depending on the number of materials. Ensuring sufficient stock capacity for each aggregate allows for better control and efficiency. If the construction requirements are basic, a batching machine with two types of aggregates may suffice. For specialized projects, three or four types of aggregates may be required, or even individual metering for each material. Additional scales for cement, fly ash, powder admixtures (using a mother-child screw system), water, and liquid admixtures should also be considered.
6. Testing Equipment
Equipping the station with a sand moisture content detector enables real-time adjustments in water addition based on the moisture level of the sand, improving the accuracy and consistency of the concrete mix.
This article is reproduced from Gu'an Xinxiang Filter Equipment Co., Ltd.: http://