Method for producing tree pit cover plate from paper mill sludge

Abstract

The invention discloses a method for manufacturing a tree hole cover plate by using papermaking sludge. In the method, a mineralizer, a flocculant, a coupling agent, a retarder and an expansion agent are respectively added to the papermaking sludge for treatment, so that the papermaking sludge is treated with The moisture content of the mud is reduced from more than 60% to less than 10%, so that the papermaking sludge can meet the requirements of stabilization, harmlessness, reduction and resource utilization, and then the papermaking sludge is crushed and homogenized to form Fine powder, papermaking sludge fine powder is added with corresponding materials and stirred by a high-speed mixer. After stirring, the material is injected into the tree hole cover shaping die from the extruder, and the melt in the shaping die is cooled to obtain the tree hole cover plate. The method effectively treats the papermaking sludge to make the tree hole cover, which reduces the production cost of the tree hole cover, saves beneficial resources, reduces the pollution of the papermaking sludge to the environment, and has greater social and economic benefits.

Description

technical field [0001] The invention relates to a method for manufacturing tree hole cover boards by using papermaking sludge. Background technique [0002] Street trees play an irreplaceable role in urban greening, and are widely used in roads, parks, street green belts and green shelters in various places; and the tree hole cover of street trees is an important part of street tree facilities. Material, application, etc. have an important impact on the landscape appearance, healthy growth and pedestrian and vehicle traffic of street trees. [0003] At present, the materials of the tree hole cover mainly include cast iron, wood, concrete and composite materials, etc. The tree hole cover of various materials has its own advantages and disadvantages, but it consumes the beneficial resources of the society and relatively increases the manufacturing cost. The papermaking sludge is a waste in the papermaking process and has great pollution. It needs to spend a lot of manpower an...

AI Technical Summary

Problems solved by technology

[0003] At present, the materials of tree hole covers mainly include cast iron, wood, concrete and composite materials, etc. Tree hole covers of various materials have their own advantages and disadvantages, but they consume the beneficial resources of the society and relatively increase the manufacturing cost.