A production method for preparing elevator counterweights from solid waste

Abstract

The invention discloses a production method for preparing elevator counterweight blocks by using solid waste materials, which comprises the following steps: breaking the solid waste materials into particles with a particle diameter within 1.5 cm by a crusher; sorting the particles to obtain density by a gravity separator 1.2g / cm 3 ~2.0g / cm 3 heavy granules; the heavy granules are sent to the harmful substance detection machine in batches for detection, the batches of heavy granules with harmful substances are separated from the system, and the batches of heavy granules without harmful substances are used as counterweights The raw materials are sent to the next step of processing; according to the requirements of the counterweight, the components of heavy granules, iron powder, sand and cement are proportioned, and an appropriate amount of water is added and the raw materials are stirred by a mixer to make the various components evenly Mixing; Pour evenly stirred raw materials into a prefabricated mold, and use a vibrating rod to vibrate and compact to solidify and form. The invention realizes turning waste into treasure by recycling solid waste, and at the same time, the prepared counterweight material has uniform density, is convenient to fill and use, and does not damage the prefabricated mold.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling and utilization, in particular to a production method for preparing elevator counterweights from solid waste. Background technique [0002] On construction machinery, especially elevators, excavators, cranes, etc., a large amount of counterweight materials are required. The existing construction machinery counterweight is generally made of barite mixed with iron powder or iron block, etc. Chinese patent (publication number: CN1265064C) discloses a kind of natural barite for counterweight filling and making counterweight In the method of prefabricated parts, barite is processed into particles with different bulk specific gravity after beneficiation, and then different particles are selected for proportioning according to the filling requirements to meet the requirements of counterweight. In actual use, the bulk ratio of processed barite is about 3t / m 3 , and the stacking specific gr...

AI Technical Summary

Problems solved by technology

In actual use, the bulk ratio of processed barite is about 3t / m 3 , and the stacking specific gravity required by the counterweight is high, because the stacking specific gravity of the cast iron block is about 7t / m 3 , it is often necessary to add cast iron blocks or iron balls to the barite powder. Although this method can reduce costs and meet the requirements of the counterweight, it still has the following technical defects: First, the density of the counterweight material is not uniform

Due to the large difference in particle size between iron nuggets and barite, they cannot be mixed uniformly. After being filled into the mold, the density will be uneven and the balance will be poor.

After being used on construction machinery, it is easy to cause vehicle rollover, overturning, etc., and cannot achieve the purpose of counterweight

Second, the cast iron block is easy to damage the prefabricated mold during vibration solidification

Add cast iron blocks or iron balls to the barite powder, then add cement and stir evenly, then pour into the prefabricated mold to solidify and form. Since the cast iron blocks or iron balls are relatively hard, when using cement vibrating rods to compact the counterweight material, the cast iron blocks Or the iron ball will hit the prefabricated mold, which will cause the wear or damage of the prefabricated mold and reduce the service life of the prefabricated mold