JP4437198B2 - Method for producing foam using crushed sludge and the like, and foam - Google Patents

Description

The present invention, waste by effective use of crushed stone powder or crushed stone sludge occurs in quarries aimed at those building materials and other useful, a process for producing and foam of the foam with crushed stone sludge and the like.

  Conventionally, the crushed stone powder and the crushed sludge generated in the quarry have been granulated (appropriate size) by secondary processing and used for aggregate or discarded.

  Further, an invention of a panel in which natural crushed stone (for example, 1.5 mm diameter) is hardened with a synthetic resin binder has been proposed.

  Next, an invention has been reported in which natural stone, artificial crushed stone, glass, ceramics, etc. are granulated and mixed, and cement is added to make a semi-incombustible building material.

Furthermore, there is a disclosure of a technique using a foaming agent and hydrogen peroxide for a refractory foam gypsum plate obtained by blending glass fiber, reactive blast furnace slug and the like with hemihydrate gypsum as a main component.
JP-A-11-81548 JP 51-52627 JP 57-38363

  The invention of the cited document 1 is intended to provide a lightweight panel having a natural stone-like texture, high mechanical strength, and light weight.

  Next, the invention of Cited Document 2 aims to provide a semi-incombustible building material that can be cast concrete without using a temporary frame material and can finish the interior simultaneously with drying of the concrete.

  In addition, the invention of Cited Document 3 is a fire-resistant foam gypsum board that uses a foaming agent to reduce the weight and add glass fiber, and further uses inorganic aggregates and reactive blast furnace slugs in order to improve the disadvantages of the gypsum material. Technology.

  As described above, the prior art is to increase the strength of the panel and to improve the properties of the building material or gypsum without using a temporary frame, each of which achieves the purpose. However, effective use of crushed stone powder or crushed sludge (zero waste) Is not shown.

  This invention uses crushed stone powder or crushed sludge, which has been used as a waste in the past, for the production of effective building materials, etc., and not only aims for zero waste, but also water retention, moisture retention, filtration Since it is a building material having excellent properties such as property, adsorptivity, light weight, fertilizer and water permeability, it can be widely used industrially as various building materials, furnace materials, soil improvement materials and the like.

That this invention, alone or a mixture of particle size 75μm or less crushed stone powder or crushed stone sludge as main raw material, and the cement 20% to 30% as a solidifying agent to 2% hydrogen peroxide as a foaming agent ~ 15%, water is added to make the total amount of water 20% to 40%, and this is stirred to form a slurry or cake, which is poured into a mold or pressed, and is a foam production method, A single or mixture of crushed stone powder or crushed stone sludge having a particle size of 75 μm or less is used as a main raw material, hydrogen peroxide is 2% to 15% as a foaming agent, and water is added to a total water amount of 20% to 40%. As a sintering aid, glass powder is added as a sintering aid, and 10% to 40% is added, mixed and stirred, put into a mold as a slurry, molded, and then 200 ° C to 1000 ° C in the atmosphere. It is characterized by firing with It is a manufacturing method of the made foam .

In another invention , a crushed stone powder or a crushed sludge having a particle size of 75 μm or less is used as a main raw material, and granulated by a conventional method while spraying 2 to 15% hydrogen peroxide water as a foaming agent. A foam production method characterized in that foamed grains are produced in or after granulation.

Next , the invention of a product is a foam characterized by being manufactured by any one of claims 1, 2, and 3.

  In the above invention, the ratio of addition of foaming agent, water, cement, glass powder, wood powder, etc. is a ratio when the main raw material is 100, for example, when hydrogen peroxide water is used as water It will be less. In short, the total amount is shown.

  In addition, the foamed granules are produced by using a crushed stone powder or crushed sludge alone or in a mixture as a main raw material, and granulating it by a conventional method while spraying 2 to 15% hydrogen peroxide water as a foaming agent. A foam production method is characterized in that foam particles are produced after the particles.

  The foamed grains can be used in the same manner as lightweight artificial media such as perlite, vermiculite, and peat moss for agricultural and horticultural materials.

The chemical composition of the crushed sludge in the invention is as shown in Table 1, the mineral composition is as shown in Table 2, and the particle size distribution is as shown in Table 3.

  The specific gravity is 2.80 and the bulk specific gravity is 1.05.

  In the present invention, when hydrogen peroxide is less than 2%, foaming is insufficient, and the characteristics of the present invention are not exhibited.

  Moreover, even if it becomes 15% or more, a foaming rate will not change and it will be a wasteful use of hydrogen peroxide.

  If the total amount of water in the present invention is 20% to 40%, the mixture becomes a slurry, and the flow into the mold and molding become easy. Therefore, although it is regulated by the total amount of water as described above, in practice, it may be hydrogen peroxide water, may be hydrogen peroxide, may be crushed stone powder, and may be in the form of a slurry. Adjust the amount of water added according to the characteristics.

  If the amount of cement in the present invention is less than 10%, the solidification strength is drastically reduced, and if it exceeds 50%, the cement mortar is formed and the porosity is decreased. As lightweight building materials, 20% to 30% is frequently used.

Becomes insufficient vitrification during sintering if the glass powder in the present invention is less than 10% total exceeds 40% observed decrease in air porosity is vitrified, longer lightweight sintered building materials Do not adopt because it loses its characteristics.

  Moreover, although it replaces with the said glass powder and a silica powder may be used, the usage-amount is equivalent to a glass powder.

Although the wood powder in this invention does not need to be used, it not only has the property that the wood powder burns during sintering to generate innumerable micropores, but also carbonizes to form ultrafine pores (10.0 μm to 0.1 μm ), which increases the harmful gas adsorption property and other water permeation properties.

The crushed stone powder or crushed sludge in the above has a particle size of 75 μm or less as shown in Table 3 above, and Al ₂ O ₃ , CaO, SiO ₂ , Fe ₂ O ₃ , TiO ₂ , MgO, K ₂ O in the components thereof. Na ₂ O and the like are converted into metal and oxygen (gas) by the reduction action of hydrogen peroxide , and oxygen becomes bubbles.

  That is, if the vaporized component is fine and is mixed uniformly, the fine pores will be uniformly distributed, and it is most preferable that continuous gas bubbles will be generated by discharging the generated gas. Adsorbents, fertilizers and water retentive materials, and if the end surfaces are covered, they become closed cells and become excellent heat insulating materials.

  According to this invention, crushed stone powder or crushed sludge that has been conventionally discarded becomes a foam material useful for building materials and the like, so there is a double effect of waste treatment and generation of useful new building materials and the like. is there.

  The foam according to the present invention is excellent in water permeability, water retention, heat retention, adsorptivity, fertilizer retention and filterability, and has the effect of becoming a good product with light weight.

  According to the method of the present invention, by adding hydrogen peroxide, foaming is caused by the material contained in the crushed stone powder or crushed stone sludge, so that there is an advantage that the bubbles are uniformized and components other than the crushed stone are not mixed, And it is very simple and easy to manufacture.

  Moreover, in the manufacturing method which mixed glass powder, there exists an effect which can manufacture a glassy ceramic foam easily.

  In the present invention, 5% to 10% hydrogen peroxide water and 20% to 30% water are mixed into a crushed stone powder or crushed sludge alone or a mixture 100 generated in a quarry and 25% of cement. % To 35% was mixed, stirred uniformly, poured into a slurry, poured into a mold, and solidified as it was, so that it solidified in 10 hours. Therefore, after demolding, curing was performed for 48 hours or more to obtain a foam of the present invention.

  In addition, the present invention mixes 5% to 10% oxygen peroxide water and 20% to 30% water with respect to crushed stone powder or crushed stone sludge alone or as a mixture 100 and 5% to 15%. Mix wood powder, mix 20% to 30% glass powder and stir to make a uniform slurry mixture, put this mixture in a mold, solidify and mold in about 10 hours, demold, The foam of the present invention can be obtained by baking for 1 hour at from 1000C to 1000C.

  This foam is porous glassy and is also novel as an object, and can withstand long-term use with excellent durability and weather resistance.

  The embodiment of the present invention will be explained. After stirring and mixing 30 kg of cement, 10 liters of hydrogen peroxide solution and 5 liters of water with 100 kg of crushed sludge (water content 30%), the mixture was dispensed into a 5 kg mold. And solidify naturally.

This is left for 8 to 10 hours, then demolded, and cured for 48 hours or more to obtain a product foam. Care in the Anaritsu was 60% to 70%.

Examples of blending after foaming are shown in Tables 4 and 5.

In another embodiment of the present invention, 100 kg of crushed stone powder, 30 kg of glass powder (100 μm or less), 10 kg of wood powder (about 100 μm ), 10 liters of hydrogen peroxide and 30 liters of water are mixed with stirring. After making it into a slurry, it is poured into a 5kg mold and solidified naturally.

  Next, if the mold is removed after 10 hours, it is dried to a moisture of 20% or less, then baked at 900 ° C. to 1000 ° C. for 1 hour, and allowed to cool naturally to complete the foam of the present invention.

Care Anaritsu in this case was 50% to 60%.

Table 6 shows a blending example of the room temperature solidified product.

Claims (4)

The main raw material is crushed stone powder or crushed sludge having a particle size of 75 μm or less, and 20 % to 30 % cement as a solidifying agent, 2% to 15% hydrogen peroxide as a foaming agent, water the total volume of water and 2 0% to 40% was added, which was a slurry or cake to 撹拌method of the origination foam which was characterized by pouring or pressing it into a mold. Alone or a mixture of particle size 75μm or less crushed stone powder or crushed stone sludge as main raw materials, to which hydrogen peroxide 2% to 15%, the total amount of water by adding water and 2 0% to 40% as a foaming agent, foam auxiliaries wood flour with addition 0-30% as wood, glass powder as a sintering agent were mixed stirred with 10% to 40%, placed in a mold with a slurry, after molding, 200 ° C. in air - A method for producing a foam , characterized by firing at 1000 ° C. Granulated by a conventional method with crushed stone powder or crushed sludge having a particle size of 75 μm or less as a main raw material, and sprayed with 2 to 15% hydrogen peroxide as a foaming agent, and during or after granulation A method for producing a foam, characterized by producing foam particles. A foam produced by the production method according to claim 1.