Glass packaging waste develops new products

1. Development of glass-wrapped waste glass-ceramics Glass-ceramics are polycrystalline solids containing a large amount of microcrystals obtained by controlled crystallization of glass in the molten state. Compared with ordinary glass, it has higher mechanical properties, good thermal shock resistance, stable chemical properties and certain cutting performance.
The main raw materials for the production of glass-ceramics are power plant fly ash, waste non-ferrous metal ore, blast furnace slag, aluminum sludge and waste glass, together with a small amount of nucleating agents such as sulfides, fluorides, and chromium oxides. Stir and then put it into the furnace.
Melting at 1400 ~ 1500 °C, stable 1 ~ 2 hours and then released, the glass quickly quenched into water, remove the broken glass, drying, ball milling, sieving; then between 800 ~ 950 °C nucleation, sintering 0.5 ~ 1 Hours, heating up to 1000 ~ 1150 °C between the crystallization, flattening, removed after 0.5 to 1 hour; finally natural cooling, annealing, denucleation, grinding, polishing made of glass-ceramic products.
The glass-ceramics produced by the sintering method can give a sparkling and beautiful pattern. This is because when the glass water is quenched into particles for heat treatment, the particle surface has a high degree of crystallization, the degree of internal crystallization is low, the high degree of crystallinity and low degree of crystallinity Some colors and reflections of light are different, so that the crystallized glass will show a pattern after grinding.
In order to obtain a clear pattern, the glass particles should be sifted and graded, and the layers should be layered in the mold according to a certain level of granularity. Note that the surface particles cannot be too fine, otherwise the surface pattern will not be obvious. The color of glass-ceramic is extremely important. To increase the whiteness of the product, an appropriate amount of zinc oxide can be introduced into the base glass. Due to its good color, no brittleness, and high strength properties, the crystallized glass has no impact on the human body, so it has been widely popularized and popularized.
2, the use of glass packaging waste development Foam glass foam glass has a low water absorption, thermal conductivity, low thermal expansion, high strength, good frost resistance and durability, can be sawed, easy to bond and other characteristics, it is a light Quality, heat-insulating, moisturizing and fireproof building materials are now widely used for thermal insulation and thermal insulation of ceilings, containment walls, internal partitions, heating pipes, ventilation pipes, cold storage, oil and gas pipelines. It can also play a role in sound insulation. Some noise-producing areas, such as compressors and fan rooms, use it as a wall to protect the walls from noise and sound absorption.
With the development of science and technology, foam glass will be widely used in petrochemical, cold-mao, underground engineering, construction, power and shipbuilding. The manufacturing method is usually a certain amount of foaming agent is added to the glass raw material powder, uniformly mixed and then put into a forming mold, in the heat recovery so that it is heated foam molding, and then slowly annealing and cooling can be obtained in the porosity More than 90% glass foam consisting of independent pores.
The raw material of the product is the soda-lime-silica glass with low softening point in the packaging waste of glass products. There are two production methods: one is the powder melting method and the other is the float method. Currently, the former method is used in China.
The process flow of the powder melting method is as follows: The auxiliary materials such as washing, drying, and foaming agent of the waste glass are mixed according to an accurate ratio and sent to a ball mill for grinding. When the material reaches the specified particle size, it is removed from the ball mill, poured into the mold frame, and sent to the tunnel kiln. It is first preheated at 350-400°C for 0.5 hour and then heated to 850°C to melt, expand, foam, and fire. , Annealed into the annealing furnace, cooled and cut into products according to the required specifications.
The common formula for foam glass is: waste glass 75-80%, water quenching 10-15%, foaming agent (graphite) 1.0-1.5, fusible modifier (Na2B4O7) 2-4%, foam booster (Sb2O3) ) 1 to 3%.
3. The use of glass packaging waste to develop glass microspheres Glass beads have different types according to different classifications. According to their use, they can be divided into industrial beads, optical beads and special beads; according to hollow and solid points, they can be divided into hollow beads and solid beads; according to their size, can be divided into fine beads (diameter 0.8 ~ 5 mm) and microbeads (diameter less than 0.8 mm). The glass beads have stable chemical properties, large mechanical strength, good smoothness, and good light reflectivity (especially directional regressivity).
It has a unique and wide range of uses, with the largest amount of low-refractive type. For example, mixed in paint as a road sign; for interior decoration and crafts. It can have a magical lighting effect at night. The production methods are often produced by the fire-fighting floater method, the spacer agent method, and the jet-blowing method. The first two methods are secondary molding methods, which are usually based on recycled waste glass. The basic principle of the fire floatation method is to break the recycled waste glass into particles of a certain size and send the glass particles in a certain way. Into the flames.