ES2424829A1 - Treatment procedure for recycling ceramic glazes as ceramic muds, for use as artificial pozzolans and their reuse for all kinds of cements and asphalt mixtures (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Treatment procedure for recycling ceramic glazes as ceramic irons, for use as artificial pozzolans and their reuse for all types of cements and asphalt mixtures. The objective of this patent is to use a new addition for cements and asphalt mixtures that solves an environmental problem produced by the surplus of manufacturing processes in the ceramic industry. More specifically, the surplus recovery procedure includes: biological treatment; separation of liquid and solid parts; adjustments and ph potential, conductivity, salinity and tds (total dissolved salts) of the liquid portion; drying by weathering the solid portion in impermeable soil with leachate collecting ducts; dislodged in jaw cylinders, mechanical dust collection; drying; crushing with continuous mill and recovery with electrostatic precipitation of impalpable particles; and storage. (Machine-translation by Google Translate, not legally binding)

Description

Treatment procedure for recycling ceramic glazes in quality of ceramic sludge, for use as artificial pozzolans 5 and its reuse for all kinds of cements and asphalt mixtures.

Technical sector

The invention is part of the technical construction sector, more specifically in that of asphalt cements and mixtures. It also affects the ceramic sector since it is based on the reuse of its alumina silicates left over from the process of

production (ceramic sludge).

Object of the Invention

15 In the spatial technical instruction of structural concrete and in its chapter 29 section

~ referring to additions, indicate what are inorganic, pozzolanic or

latent hydraulicity that finely divided can be added to the concrete to

improve some of its technical characteristics. As well as in the article

29.2.1 of the same EHE technical instruction, some prescriptions are given that the

20 pozzolanas have to comply. After the chained series of physical treatments including ellérmlco, this alum-sillcato fully complies.

Ceramic enamels as alumina-silicate leftovers from the process of

production. properly treated. They enjoy these properties. It is also possible to add a certain amount of this pozzolanic product to all types of mixtures

asphalt

Thus the object of this invention is on the one hand to redclar a surplus of the Industry

ceramic and on the other hand get a product for the construction sector, equal

30 better properties than the standard, with the consequent economic and environmental savings due to the use of this surplus.

Hence the protection in this patent 'Prooadimiento of treatment for recycling of

ceramic glazes as ceramic sludge, for use as pozzolans

35 artificial and its reuse for all kinds of cement and asphalt mixtures "

State of the art

Large amounts of waste and leftovers are generated in the European ceramic sector,

but the one who quantitatively occupies the first place is the ceramic esmaKes in

alumina quality - silicates from the production process, of which even today

5 there is no method available for their total reuse.

While there are some ceramic processes to absorb a portion of these

waste and leftovers, an important part of them remains to be reused. Possible sectors of reuse are asphalt cements and mixtures.

It can be shown that alumina-silicates from the production process

They are mainly made up of enamel remains. These alumina-silicates have a chemical and mineralogical composition similar to that of a ceramic enamel, a part of the vitreous phase and another composed of minerals such as quartz, zircon, feldspars, carbonates, alumina and clay ore (kaolins) as aistaline phases,

In addition to a small proportion of ceramic dyes.

These alumina-silicates presented in the form of sludge from frits and esmans

ceramics used and specifically in its vitreous phase, have a great activity

20 intema. Presenting, by its nature, true electrolytic phenomena, by

presence of dlvalente cations. both high or low radius. Have in

account that the glasses are liquids of the highest viscosity at room temperature, for

what resemble solid bodies.

25 Detailed description of the invention

Ceramic enamels as alumina-silicates from the process of

production in the way they are generated, have little pozzolanic activity, which

they have to undergo a treatment so that it appears. Said treatment comprises the following steps:

• Collection of ceramic leftover generated in mill cleaning,

deposits and pipes. Also in the enamel application points

ceramic in the enamelling lines.

• Transfer of these leftovers to the treatment plant that is mandatory

35 will be carried out by an authorized intermediate manager. According to Spanish regulations.

•

From here, all operations must be carried out by an authorized manager, also according to Spanish regulations.

•

Previous, primary and secondary biological treatment in E.O.A.R.

•

Liquid-solid separation.

5 • Treatment of the liquid portion, until reaching the appropriate parameters for reuse in the preparation of ceramic slippers.

• The solid portion at a density of 1,700 grll is pumped to a stripper where some cylinders are obtained, or with a humidity that is removed from the pasarios to a horizontal dryer. Giving the

10 alumina-silicates of a first heat treatment.

•

The solid portion can also be sent to vertical drying towers, by hot air in countercurrent at 500-600 "e (high heat treatment).

•

Crushing to particle size less than 45 microns, electrostatic precipitation

of the impalpable fraction. High heat treatment, in this way the pozzolanic activity of alumina-silicates is increased by 55.66%.

• Storage in silos for subsequent loading and transport, carried out by an authorized carrier.

The reuse of ceramic enamels as ceramic sludge, has as

The main advantage is to recover some leftovers, transforming one into a product with a pozzolanic activity (solid), and the other into a water (liquid) for reuse in ceramic slippers.

The pozzolanic product obtained is useful for use together with cements, water and

25 aggregates as well as asphalt mixtures. On the one hand, a very important energy saving is achieved, by replacing part of the camento and asphalt mixture with the pozzolanic product. On the other hand, it achieves that the final products obtained have a superior quality.

30 Reallzactón mode and its application The product to be treated is born from the milling processes in suitable mills and the cleaning of the deposits (cocios) that contain them, as well as the cleaning of the conduits that transport them and also of the spills and cleaning of the application points in the enamelling lines.

These leftovers are stored in this industry in rafts, from where they are extracted by suction by authorized intermediate managers (transport).

They are then deposited in authorized managers to reuse them in the composition of ceramic slippers or leave them in controlled landfills.

It is proposed in this patent of 'Treatment procedure for recycling of ceramic enamels as ceramic sludge, for use as pozzolans

artificial and its reuse for all kinds of cements and asphalt mixtures ·, perform a treatment consisting of:

1. Perform as in any E.D.A.R. with its usual procedural methods, a previous treatment, a primary treatment and a secondary treatment by the biological procedure. That is, reproduce in a

15 controlled installation, the treatment that nature performs to the waters.

2.

Also perform the Solid-Liquid separation as in any E.O.A.R.

3.

Adjust pH, pH potential, conductivity, salinity and T.D.S. of the liquid portion, for reuse in the preparation of ceramic slippers. In

specifically, adjust the pH until its values are between 8 and 11;

20 the conductivity in microsiemenslcm is between 900 and 1100; the pH potential is between -90 and -120; TOS (total dissolved salts) in mg / l between 500 and 600 asr as salinity between 0.3 and 0.6.

4. The solid portion at a density of 1,700 grn is pumped to a

stripper where compact cylinders are obtained, with a humidity that is removed when passed to a horizontal dryer. Giving alumina-silicates a first heat treatment.

5. The solid portion can also be sent to vertical drying towers, by hot air in countercurrent at 500-600 "e (high heat treatment).

6. Crushing the resulting product to a particle size less than 45

30 microns, with recovery of the impalpable fraction by electrostatic precipitation, so that it is guaranteed that the emission of solid particles into the atmosphere is less than allowed. High heat treatment, in this way the pozzolanic activity of alumina-silicates is increased by 55.66%.

7. Storage and transport.

The final product obtained with this treatment is a particle size powder.

less than 45 microns, consisting mainly of Al, or "Cao, K.O, MgO, Na, or, SiO" Zno, zrO "Fe, o. and 6.0, and practically free of CI ~ and SO °, total, of

approximately 45% of the vortex phase and 55% of the crystalline phase, easily reactive

with Ca (OH), (porllandite) from cement hydration and also with

that occur in the compositions of asphalt mixtures.

Specifically, the concentration of the oxides in the solid portion will be comprised, in

%, among the following values:

10

~ AL, O, 10 and 20

~ K, 01y5

~ N., O 0.5 and 3

~ Zn02y8

~ Faith, O, 0.5 and 3

fifteen

~ Ca04y17 ~ MgO 0.5 and 3 ~ 5iO, 40 and 65 ~ ZrO, 3y9 ~ 6, O, 1y3

The sum of the percentages SiO "AbO" and Fe, O "being also included between the values 60 and 80.

The artificial pozzolans obtained will be used as an addition for all types of 20 cement, concrete and mortar, used for all types of construction and

also its use for all types of asphalt mixtures used in construction

of all types of buildings, roads, motorways, highways, roads and affirmants in any type of soil.

Claims (7)

one.

Procedure of treatment of ceramic enamels (alumina-silicates), under the

form of ceramic sludge, characterized in that it converts them into pozzolans

5

artificial for use as an addition to all types of cements,

concrete and mortar, used for all types of constructions and also

its use for all types of asphalt mixtures, which includes the following

stages:

to. Pretreatment of sludge, primary treatment and treatment

10

secondary by the biological procedure.

b. Separation of parts, liquid and solid.

C. Adjust pH, pH potential, conductivity, salinity and T.O.S. of the

Uquida portion, for reuse in the preparation of slippers

Ceramics

fifteen

d. Pumping of the solid portion at a density of 1,700 grn at a

grinding machine to obtain compact cylinders, with a humidity that

It is removed by passing them through a horizontal dryer.

and. Sending the solid portion to vertical drying towers, by air

heat in countercurrent at 500-6OQO e, which is a treatment

twenty

high thermal

F. Crushing of the resulting product, with recovery of the fraction

impalpable by electrostatic precipitation, so that it is guaranteed

that the emission of solid particles into the atmosphere is less than the

penmijlda. Aggressive heat treatment because grinding is done

25

with heat input, by hot air in countercurrent, at a

temperature between 500 "and 600 'C.

2.

Method of claim 1, wherein in phase c) the values are adjusted

pH until it is in the following ranges:

-pH 8 Y 11 -Potential pH -90 Y -120

30

-Conductivity in microsiemens / cm 900 and 1100

-TOS in mgn 500 and 600 -Salinity between 0.3 and 0.6

3.

Method of claim 1, wherein in phase e) drying is performed

in continuous horizontal dryers up to 0.5% of the content in H20.

It includes high heat treatment that increases the pozzolanic activity of the

35

alumina-silicates.

Four.

The method of claim 1, wherein during phase f) the

crushing of the resulting product to a particle size less than 45

microns It includes aggressive heat treatment.

5.

Product obtained by the procedures defined in claims 1 to 4.

5

The final product will have the following concentrations in% between

the values:

-

Ca04y17 -MgO 0.5y 3 -5iO, 40 and 65 -ZrO, 3y9 -6.0 31 y3

-

AL, 0 310 and 20 -K, 01y5 -Na, O 0.5y 3 -Zn02y8 -Fe, 0 3 0.5 and 3

The sum of the percentages Si02, Ab03, and Fe20 3 being also included,

between values 60 and 80.

6.

Use of the product obtained according he process definite in the

fifteen

claims 1 to 4, as an addition to all types of cements, concretes and

mortars, employees for all types of constructions and buildings.

7.

Use of the product obtained according he process definite in the

claims

one to 4, how addition for all from blends asphalt

used

in road construction, highways, highways, roads Y

twenty

affirmative in any type of soil.

25