The selection criteria for quantitative feeders mainly come from the material information, project information, and relevant process design drawings submitted by users. The selection criteria are mainly as follows.
(1) The correct normal and maximum feeding conditions provide a basis for selecting the feeding range of the feeder, ensuring that the quantitative equipment operates at 60% to 80% load for a long time, avoiding long-term 100% load operation or low load operation, which may shorten the service life of the equipment and affect the measurement accuracy. The feeding amount is crucial for the selection of equipment conveying bandwidth, reduction motor, frequency converter, and weighing sensor level, and it is necessary to avoid situations where the equipment cannot operate on site due to unreasonable configuration.
(2) The correct material name is particularly important for an experienced equipment manufacturer. It can be combined with processing experience to judge the reliability of the material information provided by the customer, and timely communicate and verify with the customer to avoid equipment instability on site due to incorrect information provided.
(3) The particle size and abrasiveness of materials play an important role in the selection of conveying bandwidth and feeding hopper configuration for quantitative feeders.
(4) The specific gravity of the material pile plays an important role in the process applicability, bandwidth selection, and gearbox motor selection of the quantitative feeder.
(5) The moisture content of the external water of the material plays an important role in the applicability of the quantitative feeder process and the configuration of the feeding hopper. For some materials that are difficult to discharge, such as high moisture clay and high moisture chalk, a plate feeding scale is a better choice.
(6) The temperature of the material plays an important role in the applicability of the quantitative feeder process and the selection of the conveyor belt. For materials with excessively high temperatures (such as clinker with a maximum temperature of 200 ℃ under abnormal conditions), it is recommended to use a plate feeding scale.
(7) The free stacking and flowability of materials mainly affect the selection of feeding hopper type, conveyor belt, and scale body length.
(8) The size of the feeding hopper and the center to center distance between the inlet and outlet of the quantitative feeder are direct factors affecting the rationality of the length selection of the scale body.
(9) The upstream and downstream processes of the quantitative feeder determine the selection of the electrical control system for the quantitative feeder. For example, the speed control of upstream pre feeding equipment and the setting of the second weighing bridge are related to the upstream and downstream processes.
(10) The installation environment, temperature, and altitude directly determine the painting scheme of the quantitative feeder. The selection of the deceleration motor needs to consider the high temperature resistance, low temperature resistance, or high-altitude usage requirements to avoid situations where the equipment is difficult to start or cannot operate normally in special environments.
It is not difficult to see from the above 10 points that the selection of a quantitative feeder is a seemingly simple equipment, but in fact, it is influenced by many factors.
