Cost Of A Simple Screener For Gypsum

Abstract

Simple Gypsum Screener Case Analysis The screen is the main working part of the Simple Gypsum Screener to complete the screening process, and it is also the main wearing parts. After the screen is worn or damaged in the long-term op…

Simple Gypsum Screener Case Analysis

The screen is the main working part of the Simple Gypsum Screener to complete the screening process, and it is also the main wearing parts. After the screen is worn or damaged in the long-term operation, it will cause confusion of materials at all levels and seriously affect the quality of the finished product; improper operation and use will cause the screen to break too fast. Frequent replacement of screens directly increases production costs. This paper takes a certain plant as an example to analyze the reasons for the short life of the screen and how to carry out longevity transformation of the screen.

Simple Gypsum Screener Case Introduction

A selected plant is broken and adopts a three-stage and one closed-circuit process. After the crushing, there is a dry selection. After the ore is coarsely crushed, mediumly crushed and dry-selected, the dry-selected tailings are transported by the conveyor belt to the waste stone silo, and the concentrate is transported to the screening workshop through the conveyor belt for screening. The sieving adopts a double-layer linear Simple Gypsum Screener, the upper sieve mesh has a mesh size of 25 mm×50 mm, the lower mesh mesh has a mesh size of 12 mm×25 mm, and the separation granularity is 12 mm. The production capacity of each equipment is 600t/h. The sieved qualified products are transported to the grinding bin, and the sieved products are transported to the medium and fine crushing workshop for fine crushing. The finely crushed products are transported by the conveyor belt to the screening workshop for screening, and the fine crushing and screening are used to form a closed circuit.

A total of 8 double-layer linear Simple Gypsum Screeners are used for screening. Among them, 7 sets are operated all the year round. Each Simple Gypsum Screener is equipped with 6 upper screens and 6 lower screens with a total of 84 screens. The price is 0.708 million yuan / piece, and the cost of replacing a batch of screen net is 594,700 yuan. Therefore, the service life of the Simple Gypsum Screener screen is directly related to the production cost of the beneficiation.

The Reason Why The Simple Gypsum Screener Screen Has A Short Life

Installation Is Not Standard

The quality of the Simple Gypsum Screener screen has a great influence on the working effect of the screen. The Simple Gypsum Screener of the plant has been in operation for many years. Due to the variety of screens, there is no uniform standard for each change of the Simple Gypsum Screener screen. The reasonable failure mode is wear, but the damage form of the screen at the production site is brittle fracture. The main reason is that the screen of the Simple Gypsum Screener is not tensioned, especially if it is not tensioned twice. The Simple Gypsum Screener screen is coiled during transport and storage, with the inside being stressed and the outside being pulled. After a period of installation, the Simple Gypsum Screener screen strain is released and will be slack, requiring 2 tensions. If the Simple Gypsum Screener screen is insufficiently tensioned, it will vibrate along with the screen body during operation, and at the same time, it will generate 2 times of vibration with respect to the screen body, causing brittle fracture of the steel wire in the screen. Five screens were randomly selected from the Simple Gypsum Screeners No. 1 to No. 7 to measure the tension gap. The data are listed in Table 1.

It can be seen from Table 1 that the tension gap of the Simple Gypsum Screener screen is generally larger than 10 mm, which is mainly caused by the non-standard installation of the screen. The tensioning gap of the screen is large, resulting in insufficient tension of the screen, and the trabecular beam below it cannot be completely contacted. When the Simple Gypsum Screener is running, the screen and the girders collide with each other, causing the girders and the screen to wear abnormally. , shorten the service life.

Screen Surface Feed Impact

Since the Simple Gypsum Screener of the plant adopts the direct feeding mode, the feeding conveyor conveys the material to the head wheel funnel and directly falls on the sixth screen of the Simple Gypsum Screener, as shown in Fig. 2. The life of the 6th screen of 6 Simple Gypsum Screeners was randomly selected from the site, and the data is listed in Table 2. It can be seen from the statistical results that the average life of the sixth screen is only 2.45 months, and the wear caused by the impact of the material is more serious than other screens.

According to the field investigation, the sixth screen of the Simple Gypsum Screener is mainly under the feeding funnel, and the material impact is the largest. Therefore, the abnormal wear of the sixth screen is the main cause of local wear of the screen.

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