First, the production of non-broken force for mechanical force type crusher and fine crushing superfine crusher
From the comparison between the gravity type crusher and the wind type crusher, it can be known that, in general, the crushing force mode is the key in the crusher, and the non-crushing force factor is also an organic component of the crusher. Under certain conditions, the non-broken force causes the material to achieve more significant crushing effect when the material passes through the crushing cavity, and is also the key to solving the crushing solution under certain conditions. It is also a feasible method and approach to study crushing by establishing crushing equipment in a non-traditional crushing manner.
(A) Vertical shaft compound crusher review
1 Development of vertical shaft compound crusher
In order to provide the market with excellent quality and stable performance, which is especially suitable for fine crushing equipment, our research focuses on finding breakthroughs in both wear-resistant materials and product structural design.
1.1 Selection and Development of Wear Resistant Materials for Vertical Shaft Compound Crusher
1.1.1 About improving the hardness of wear-resistant materials
Increasing the hardness of the wear resistant material can increase the life of the wear resistant part. We have worked with related institutes to develop wear-resistant materials with hardness values HRC>60-65 and achieved certain results. However, there are still gaps in the production practice. Moreover, when the hardness is increased by a certain degree, the wear resistance effect does not increase proportionally with the hardness. On the other hand, simply increasing the hardness of wear-resistant materials is not cost-effective.
1.1.2 Changing the Internal Microstructure of Abrasion Resistant Material
After observing and comparing, it is found that there are traces of strip-shaped plough grooves in the hammer wear of the crushing hard material, which shows the wear characteristics of the chisel, and the wear surface of the broken soft limestone hammer head is smooth and bright, showing abrasive wear characteristics. This is because limestone is relatively brittle, soft, and easily cracked, while hard materials have not only high hardness but also strong sharpness.
From the metallurgical structure of the hammerhead material, the anti-abrasion resistance is mainly carbides must be placed on the substrate. Therefore, the grooves appearing on the wear surface of the hammer head are hard materials to sharpen the matrix of the hammerhead body, and the truly wear-resistant carbides cannot play a proper role and fall off.
To this end, we re-developed countermeasures, that is, to ensure that the hardness of the hammer head HRC> 60-65, but also through the formula and heat treatment process, to achieve the refinement of carbide organization, strengthening the matrix. After crushing and inspection, the wear condition has been greatly improved, and the life of the hammer has been greatly improved.
However, the improvement of the life expectancy of wear-resistant materials is limited after all, and there are new discoveries or breakthroughs in technology and technology that are by no means a day. The most realistic solution is to find the best way to compensate for wear on the crusher structure.