CN105669137A - Resourceful treatment method of paint slag - Google Patents

Abstract

The invention provides a resourceful treatment method of paint slag. Paint slag powder, straw powder and zeolite are solidified into a compound panel at a room temperature through surface modification, cement solidification and strong bonding, and paint slag powder with granularity of 100 microns or lower, straw powder with granularity of 5-10 mm and zeolite powder with granularity of 1-5 mm are added as additives and then subjected to stirring and mixing, room-temperature solidifying, pouring forming, bubble removing, surface processing, demolding and drying to obtain the compound panel. The preparation process is free of pollution, the process is simple, cost is low, the prepared panel is large in practical value, and the resourceful utilization of paint slag is achieved.

Description

A kind of recycling processing method of paint slag

Technical field:

The present invention relates to the recycling processing method of a kind of paint slag, belong to the solid waste Treatment and recovery technical field in field of Environment Protection.

Technical background:

Along with the fast development of China's economy, the yield of solid waste also presents growing number of trend, and the hazardness of environment and human body certainly be can not be ignored by solid waste pollution, and it directly influences the life of people, has a strong impact on environmental and human health impacts.

Waste oil paint be go bad, paint expired, remaining, stock. Various paint are all made up of film forming matter (various resin), solvent, pigment, desiccant, additive. Common waste oil paint makes solvent typically by gasoline, and epoxy iron red shop primer is containing a small amount of dimethylbenzene, and dipping lacquer, mainly containing toluene, also has a small amount of benzene. Spray paint (nitrate paint) and in diluent (banana oil) containing volume benzene or toluene, dimethylbenzene. Wherein 200# solvent naphtha accounting in paint is 30%, and yellow, the color stuffing such as bright red contain the toxic heavy metal such as lead, cadmium.

Oil Paint Slag is the paint slag in external coating process. Current China has substantial amounts of paint slag to be transported to some settlements to seal up for safekeeping on the spot, be exposed to open space, environment is made a very bad impression. For automobile industry, in automotive paints spraying process, hand spray has at least the over-sprayed paint fog of 40%～60% to disperse, and electrostatic spraying also can produce the over-sprayed paint fog of more than 10%, and over-sprayed paint fog agglomerate and sink forms paint slag. According to statistics by 2010, China's auto output reaches 10,000,000, and automobile pollution reaches 52,000,000, if calculating by each automobile lacker 30-40kg, needs automotive paints to reach 450,000 t altogether, and the utilization ratio according to 60% calculates, and at least to produce 180,000 t paint slags.

Now, environmental pollution and shortage of resources contradiction highlight day by day, and solid waste safe handling and recycling seem more and more important, how to realize safe disposal and resource is the important directions that Industrial Solid Waste processes development.

Summary of the invention:

The technical problem to be solved is to provide manufacture process cleanliness without any pollution, and technique is simple, low cost, and prepared composite strengthening goods practical value is big, it is achieved the recycling processing method of a kind of paint slag of low-carbon environment-friendly and resource reutilization.

For solving above-mentioned technical problem, the present invention provides the recycling processing method of a kind of paint slag, adopts surface modification, cement solidification, strong bond to make paint slag powder, powder of straw, zeolite be solidified into composite board at normal temperatures. Specifically comprise the following steps that

(1) collecting paint slag in automotive paints workshop, size-reduced screening processes and obtains particle diameter paint slag powder below 100 μm;

(2) straw is crushed and screened process, obtain the particle size range powder of straw at 5～10mm;

(3) take natural zeolite, obtain the particle size range zeolite powder at 1～5mm by crushing and screening;

(4) by powder of straw that paint slag that mass percent is 60～80%, mass percent are 10～20%, mass percent be 10～20% zeolite powder mix; The EVA latex be separately added into the stearic acid accounting for mixed material weight 0.1～0.5%, accounting for mixed material weight 0.1～0.5%, the magnesia-alumina brucite accounting for mixed material weight 0.1～0.5%, stir mixed processing;

(5) mixed material after mixed processing 85～100% is mixed with cement powders by mass percentage, add the activated alumina accounting for mixed material weight 0.1～1%, add appropriate water, forced mixer or mortar mixer are stirred mixing, form slurry;

(6) slurry is injected die trial, moulding by casting;

(7) it is placed on bobbing machine by the die trial after injection slurry to vibrate 5min, remove bubble, accelerate the hydrothermal synthesis reaction of Binder Materials;

(8) surface treatment: pulp surface is struck off with scraper;

The demoulding after (9) 24 hours, obtains composite layered board after drying.

Wherein, described EVA latex, for vinyl acetate and ethylene copolymer, is a kind of powerful water-based adhesion agent. Described cement is portland cement, and blender is conventional forced mixer or mortar mixer or agitator for cement mortar, and rotating speed is adjustable.

Wherein, described magnesia-alumina brucite, is by gel aluminum hydroxide, magnesium hydroxide, magnesium bicarbonate solution heat (60-90 DEG C) stirring in a kettle., it is thus achieved that white precipitate also dries the white powder prepared.

The invention has the beneficial effects as follows: the present invention adopts paint slag powder, powder of straw, zeolite to obtain composite board; Adopt low-cost cement as firming agent, be sufficiently mixed with paint slag powder, powder of straw, zeolite, get final product curing molding at normal temperatures, can be made into brick material, section material for wall and other municipal works material; Zeolite powder is porous material, light weight, and intensity is big, as cement hydraulicity active blending material, is beneficial to making light-high-strength sheet material and brick; Paint slag powder particles is tiny, by sticking in zeolite after mixing; By stearic effect, powder of straw and the interface binding power of the reinforcing material such as zeolite powder, paint slag powder can be greatly improved; Add EVA latex, make mixture in cement solidification process, the initial stage adherence of mixed material is high, adhesion-promoting is high, greatly strengthen the combination of curing materials, good cooperative effect is served in manufacturing composite layered board process, the section bar adhesive property prepared is strong, produces and construction cost degradation.

Adding magnesia-alumina brucite, section bar can be made to possess fire resistance, tolerance high temperature capabilities is greatly improved.

Activated alumina has many capillary channels, specific surface area is big, water, oxide etc. are had stronger affinity, firming body breaks (the flying dust crystalline material in useless SCR catalyst contains sulfate composition) can effectively to prevent the compositions such as the sulfate in Industrial Solid Waste and cement composition from causing, in the process of cement solidification, add activated alumina and be favorably improved the intensity of cement based composite board.

Advantages of the present invention:

(1) make paint slag powder, powder of straw, zeolite obtain recycling, decrease and adopt because it uses routine techniques to recycle landfill or simple process to cause environmental pollution;

(2) paint slag powder, powder of straw, zeolite, stearic acid, EVA latex, magnesia-alumina brucite serve good cooperative effect in cement solidification course of reaction, substantially increase mechanical property and the fire resistance of sheet material, simultaneously because good adhesive property, sheet material is expected to substitute existing floor tile;

(3) adopting cement as firming agent, get final product curing molding at normal temperatures and pressures, cost is low;

(4) technique is simple, and properties of product are excellent, are advantageously implemented industrial applications.

The inventive method processing technology is simple, and required engineering equipment is few, it is adaptable to large-scale production; Meanwhile, the sheet material prepared can be used for floor tile, municipal administration material etc., with low cost, economical and practical, has broad application prospects.

Accompanying drawing explanation

Fig. 1 is the process chart of the recycling processing method of a kind of paint slag of the present invention

Detailed description of the invention

Technical scheme is further described below by way of specific embodiment.

Embodiment 1:

Prepare mass fraction to be the particle diameter of 80% paint slag powder below 100 μm, mass fraction be the particle size range of 10% the powder of straw of 5～10mm and mass percent be 10% particle size range at the zeolite powder of 1～5mm, blender is sufficiently mixed, add the stearic acid accounting for mixed material weight 0.1%, add the EVA latex accounting for mixed material weight 0.5%, add the magnesia-alumina brucite accounting for mixed material weight 0.1% and be uniformly mixed; Mixed material after processing 85% is sufficiently mixed with cement powders by mass percentage, adds the activated alumina accounting for mixed material weight 0.1%, add appropriate water and be stirred mixing, form slurry; Slurry is injected die trial, moulding by casting; Die trial after injecting slurry is placed on bobbing machine and vibrates 5min, remove bubble, accelerate the hydrothermal synthesis reaction of Binder Materials; With scraper, pulp surface is struck off; The demoulding after 24 hours, obtains compound enhancing sheet material after drying.

Embodiment 2:

Prepare mass fraction to be the particle diameter of 60% paint slag powder below 100 μm, mass fraction be the particle size range of 20% the powder of straw of 5～10mm and mass percent be 20% particle size range at the zeolite powder of 1～5mm, blender is sufficiently mixed, add the stearic acid accounting for mixed material weight 0.5%, add the EVA latex accounting for mixed material weight 0.1%, add the magnesia-alumina brucite accounting for mixed material weight 0.5% and be uniformly mixed; Mixed material after processing 100% is sufficiently mixed with cement powders by mass percentage, adds the activated alumina accounting for mixed material weight 1%, add appropriate water and be stirred mixing, form slurry; Slurry is injected die trial, moulding by casting; Die trial after injecting slurry is placed on bobbing machine and vibrates 5min, remove bubble, accelerate the hydrothermal synthesis reaction of Binder Materials; With scraper, pulp surface is struck off; The demoulding after 24 hours, obtains compound enhancing sheet material after drying.

The sheet material that the embodiment of the present invention manufactures, has enough intensity and caking ability, light weight, mainly can be used as building pavior brick, square brick, lawn brick, city Route for pedestrians tile work etc.

Claims (1)

1. a recycling processing method for paint slag, adopts surface modification, cement solidification, strong bond to make paint slag powder, powder of straw, zeolite be solidified into composite board at normal temperatures, it is characterised in that: specifically comprise the following steps that

(1) collecting paint slag in automotive paints workshop, size-reduced screening processes and obtains particle diameter paint slag powder below 100 μm;

(2) straw is crushed and screened process, obtain the particle size range powder of straw at 5～10mm;

(3) take natural zeolite, obtain the particle size range zeolite powder at 1～5mm by crushing and screening;

(4) by powder of straw that paint slag that mass percent is 60～80%, mass percent are 10～20%, mass percent be 10～20% zeolite powder mix; The EVA latex be separately added into the stearic acid accounting for mixed material weight 0.1～0.5%, accounting for mixed material weight 0.1～0.5%, the magnesia-alumina brucite accounting for mixed material weight 0.1～0.5%, stir mixed processing;

(5) mixed material after mixed processing 85～100% is mixed with cement powders by mass percentage, add the activated alumina accounting for mixed material weight 0.1～1%, add appropriate water, forced mixer or mortar mixer are stirred mixing, form slurry;

(6) slurry is injected die trial, moulding by casting;

(7) it is placed on bobbing machine by the die trial after injection slurry to vibrate 5min, remove bubble, accelerate the hydrothermal synthesis reaction of Binder Materials;

(8) surface treatment: pulp surface is struck off with scraper;

The demoulding after (9) 24 hours, obtains composite layered board after drying.