What are the specific advantages of the application of recycled sand equipment

In the production equipment used in the foundry industry, recycled sand equipment is also a relatively common one. It is used in the foundry industry because many of its advantages are applicable to today's foundry companies. The application advantages of recycled sand equipment are also closely related to its production process. Therefore, their production and design have adopted good materials and mature technology, which will give them application advantages. There will be more and more.
The fixed operating cost of recycled sand equipment is relatively small, the cost of production line related machinery and equipment is relatively low, and the source of clay sand can generally save a lot of material and labor costs for enterprises. And recycled sand equipment without drying, saving energy. The production line has obvious performance advantages and strong practicability. The old sand can be reused after regeneration treatment, the regeneration process is relatively simple, and the operating cost is not too high. Recycled sand equipment is simple to operate, requires low technical personnel, and usually can be operated without professional training. Therefore, it is relatively easy to recruit workers, which can save human capital for enterprises.
In recent decades, foundry enterprises have developed rapidly, and reclaimed sand equipment has also developed rapidly. According to the different binders, the types of casting old sand can be divided into: old clay sand, old resin sand, old water glass sand. Characteristics of old clay sand: in the long-term continuous application process of old clay sand: due to the loss of structural water, clay becomes dead clay; Part of coal powder will be ablated into coke or ash; The content of old core sand gradually increases; These failed parts may become micro-powder less than 0.02mm, or agglomerate into clumps, or cover the surface of sand particles. In the whole process of the application of the circulation system, the film will be covered many times, forming a layer of strong inert film on the surface of the sand, seriously destroying the original performance of the original sand, reducing the forging performance such as the permeability and compressive strength of the sand. The content of old core sand increases gradually, which will reduce the hot and wet compressive strength and anti-sticking sand of the sand. When used sand cannot be used, it can only be discharged as solid waste. The emergence of reclaimed sand equipment production line can recycle old clay sand. The old sand can be reused after the reclaimed sand equipment, and the cost of easy operation is not high. Thereby reducing the cost of clay sand for foundry enterprises.
The residual amount of fine powder in the reclaimed sand treated by dry regenerator can be controlled below 0.8%. Compared with new sand, the concentration of reclaimed sand is close to that of new sand. Due to the continuous friction between sand grains or sand layers during the regeneration process, grinding makes the edges of the angular silica sand rounding, reducing the surface area, and reducing the amount of binder when mixing sand.
Surface condition of reclaimed sand in reclaimed sand equipment:
Before treatment, the sand surface is coated with adhesive, which is covered with particles and carbonized materials and is not smooth. On the surface of the treated reclaimed sand, due to impact and friction, the film covering the sand is partially peeled off, and the particles and carbonized substances attached to the sand have fallen off and are forcibly sucked out by the sand. wind, so the surface of the sand is smooth.
Compressive strength of new sand and reclaimed sand: The 24-hour compressive strength of reclaimed sand is higher than that of new sand.
Recycled sand loss on ignition: After repeated impact, friction and wind selection, the waste sand treated by the regenerator can remove the carbonized substances attached to the surface of the sand particles, thereby greatly reducing the loss on ignition. The dosage can be controlled at about 0.8%. If you increase the number of regenerations, the burn indicator will decrease accordingly.