Multi-stage calcium impurity filtering device for industrial silicon smelting

By using a multi-stage calcium impurity filtration device, which utilizes gradient filtration media and a gas-water synergistic backwashing system, the problem of low calcium impurity removal efficiency in industrial silicon smelting has been solved, achieving efficient calcium impurity removal and reduced equipment maintenance costs.

CN224077136UActive Publication Date: 2026-04-03XINJIANG WEST HESHENG SILICON MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-02
Publication Date
2026-04-03

AI Technical Summary

Technical Problem

In existing industrial silicon smelting processes, a single filtration device cannot effectively remove calcium impurities, resulting in low filtration efficiency and easy clogging of the equipment, which increases production costs and maintenance workload.

Method used

A multi-stage calcium impurity filtration device is adopted, including anthracite coal layer, quartz sand layer, alumina layer and magnetite layer in the tank. The calcium impurities are deeply removed by using a gradient filtration media system combined with an air-water synergistic backwashing system, and the PLC control system enables automated operation.

Benefits of technology

It effectively removes calcium impurities, reducing the calcium content from 1200ppm to below 15ppm, reducing backwashing energy consumption by 40%, extending equipment life to 8 years, and improving production efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a multi-stage calcium impurity filtering device for industrial silicon smelting, relates to the technical field of silicon smelting and purification, and provides an integration scheme comprising a pressure vessel tank body, a gradient filtering layer, an air-water backflushing system and an intelligent control module aiming at the problems that the existing single-stage filtering calcium retention rate is low, a medium is easy to harden and equipment is seriously corroded. A water inlet pipe and a water outlet pipe are symmetrically arranged on the side wall of the tank body, an anthracite layer, a quartz sand layer, an aluminum oxide layer and a magnetite layer are arranged in the tank body from top to bottom and are separated by honeycomb-shaped stainless steel supporting partition plates with water through holes, and a sintered metal supporting plate is arranged at the bottom; a backwashing water outlet pipe is arranged at the top of the tank, a compressed air pipe is connected to the side wall, and a control system comprising a PLC, a calcium ion sensor and a pressure difference transmitter is arranged outside the tank. During working, liquid is intercepted, adsorbed and magnetically captured step by step through four-stage media, and the removal rate of calcium impurities is larger than or equal to 98.5%; in the backwashing stage, blockages are removed through 0.4 MPa gas-water mixed pulse, the backwashing period is prolonged to 12-15 hours, and the energy consumption is reduced by 40%.
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