After long time of working, the jaw plate will be abraded, so that the discharging mouth will become wider than before; due to different requirements for the product granularity, there should be some adjustment devices used for adjusting the discharging mouth of the crusher.

At present, there are four adjustment devices for the discharging mouth of jaw crusher（Щековая дробилка）:

1. Wedge type adjustment device. It is suitable for medium and small-sized jaw crusher.

2. Change the rear toggle plate. Generally speaking, three to five rear toggle plates with different lengths are equipped, and using rear toggle plate with different lengths can adjust the width of the discharging mouth. It is suitable for large and medium-sized jaw crusher.

3. Change the number of the gasket. Between the toggle plate and the back wall of the machine, there are a group of grasps with the same thickness. Increasing or decreasing the number of the gaskets can adjust the discharging mouth. It is suitable for small jaw crusher.

4. Hydraulic adjustment device. Using the hydro-cylinder and the plunger device can adjust the discharging mouth. It is suitable for hydraulic jaw crusher.

In recent years, the mining machinery manufacturing companies have researched and developed wide-type fine jaw crusher which is used for crushing cement aggregate and comminuting materials. Compared with PE jaw crusher, it has many advantages such as high crushing ratio, less dust, high output and small abrasion, so that it has been widely used in many industries.

спирального желоба, концентрацонного стола

Compared with common high gradient magnetic separator（магнитный сепаратор）, the superconductivity magnetic separator has made great improvement in reducing electricity consumption, decreasing size and light and reducing working cycle, thus improving the working efficiency and the processing capacity. However, the relevant equipment fees and production fees are very high which limits its application and development. With the constant breakthroughs made in the superconductivity technology, especially the development of low-cost superconductivity materials, the superconductivity magnetic separator is hopeful to replace common high gradient magnetic separator and gets wider application in the ore dressing filed.

In recent years, we indeed made great progress in the research and manufacturing of magnetic separator equipment and made plenty of achievements in scientific research that play an important role in promoting the development of mining production. However, the existing machine types, models and specifications still cannot satisfy the production requirement. Since the nature of the rocks and the requirement for the product quality are different, the technology of magnetic separation is also different. According to different technological requirements, the magnetic separating machines with different working performances should be selected. However, in the domestic magnetic separation industry, magnetic separators with the same performances and identical structures are basically adopted regardless of the nature of the rocks and the differences of the separation requirements. This limits the improvement of separation indexes to some degree.

The development directions of the magnetic separator equipment are:

1. The magnetic system will be more reasonable and perfect.

2. The magnetic materials will develop from low level to high level.

3. The equipment will be large in size.

4. The product specifications will form serialization.

5. The control mode will develop toward program control, modular circuit and automatic monitoring.

роторной дробилке, мельницы для измельчения шлака