CN101898900B

CN101898900B - Recycling method of ceramic tile polishing waste residue

Info

Publication number: CN101898900B
Application number: CN2010102315385A
Authority: CN
Inventors: 余爱民; 曾成勇; 郭程长; 罗增良
Original assignee: Hangzhou Nabel Group Co ltd
Current assignee: Wuhu Noble New Materials Co ltd
Priority date: 2010-07-20
Filing date: 2010-07-20
Publication date: 2012-05-23
Anticipated expiration: 2030-07-20
Also published as: CN101898900A

Abstract

The invention discloses a method for recycling tile polishing waste residues, which comprises the following steps: A. classifying the polishing waste residue into two types according to whether the polishing waste residue contacts with a polishing grinding block or not; B. homogenizing the polishing waste residue contacted with the polishing grinding block for producing foamed ceramic; and C, adding 10-25 percent (weight ratio) of clay into the polishing waste residue which is not contacted with the polishing grinding block, and milling by ball milling to prepare powder, wherein the prepared powder is added into the conventional powder in a proportion of not more than 40 percent (weight ratio) and is used for producing the micro powder porcelain polished brick. The invention can effectively utilize the ceramic tile polishing waste residue and improve the product quality stability by classifying and utilizing the waste residue and the process of preparing powder and mixing.

Description

The recoverying and utilizing method of ceramic polishing waste residue

Technical field

The invention belongs to the architectural pottery field, particularly relate to the recoverying and utilizing method of the polishing slag that in the ceramic tile production process, produces.

Background technology

In the ceramic tile production process, generally can produce five kinds of solid industrial wastes, be respectively useless mud, useless base, useless powder, waste residue, useless brick; Wherein former three results from before the firing process, relatively easy recovery utilization, and both processes of back are fired; Physical and chemical performance changes, and deals with relative difficult.What the present invention relates to is the recycling to polishing slag.

Ceramic tile needs cutting, edging after firing, if polished tile, also need slightly throw, polishing program such as smart throwing, and the solid waste that in these processes, produces is called waste residue.Processing to waste residue was simple landfill in the past, and in recent years along with the attention to low-carbon environment-friendly, the research of this respect also more gets up, and more representational document has:

Chinese patent CN101709001 discloses a kind of method of firing porous filtering ceramic tiles with ceramic polishing scrap, and it is that base is fired then with ball milling after ceramic waste material and other raw materials mix.

Chinese patent CN101186519 discloses a kind of porous ceramic film material and preparation method thereof, and it is that ceramic waste material and clay etc. are mixed the back ball milling equally, and base is fired then.The drawback of these two kinds of methods is the unstable product quality that obtain.

Summary of the invention

The purpose of this invention is to provide a kind of recoverying and utilizing method that utilizes the better ceramic polishing waste residue of effect.

For this reason, the technical scheme of the present invention's employing is such: the recoverying and utilizing method of ceramic polishing waste residue comprises the steps:

Whether A contacts the polishing abrading block with polishing slag by it and is divided into two types;

B is used to produce foamed ceramics after the polishing slag homogenizing with contacted polishing abrading block;

C adds the clay of 10-25% (weight ratio) in the polishing slag of not contacted polishing abrading block, ball milling powder process, and the powder that makes adds in the conventional powder with the ratio that is no more than 40% (weight ratio), is used to produce the micro mist polished brick in porcelain character.

It is scheme preferably that clay among the step C uses kaolin.

The contriver is through a large amount of discovering, polishing slag is utilized a very big reason of poor effect is not classify waste residue in the past.Polishing slag results from preceding edging, strickling, slightly throws, smartly throw, in the several operations of back edging, wherein before edging, strickling, back edging with diamond as cutting tool; And throw in the two procedures thick the throwing with smart, be to process abrading block with corundum abrasive and magnesia oxychloride cement sticker, unavoidably have wearing and tearing in the polishing process, its powder can get in the waste residue.

It is thus clear that these two kinds of polishing slags have different character because of whether having chlorine oxygen magnesium sticker.In case get into the formula system of ceramic tile, its influence to overall performance is different, also needs diverse ways and carries out technology controlling and process.Therefore but in actual production, the ratio of two kinds of waste residues is not a constant, but great fluctuation process is arranged very much, and is joining them when utilizing again in the raw material, and quality product is very unsettled.The present invention is through classifying polishing slag, and one type is used to produce foamed ceramics, and one type is used to produce conventional micro mist polished brick in porcelain character, and two types of waste residues can be not admixed together, the stability problem that has brought with regard to fundamentally having solved their ratios difference.

Magnesia oxychloride cement binder content in the abrading block is bigger, and the staple of this sticker is 3 [Mg (H ₂O) ₂(OH) ₂] Mg (H ₂O) ₂Cl ₂With 5 [Mg (H ₂O) (OH) ₂] Mg (H ₂O) ₃Cl ₂, produce series of chemical in the heat-processed:

Fs thermal decomposition process (100 ℃-265 ℃):

3[Mg(H ₂O) ₂(OH) ₂]·Mg(H ₂O) ₂Cl ₂→3[Mg(H ₂O)(OH) ₂]·Mg(H ₂O) ₂Cl ₂+3H ₂O

3[Mg(H ₂O)(OH) ₂]·Mg(H ₂O) ₂Cl ₂→3Mg(OH) ₂·Mg(H ₂O) ₂Cl ₂+3H ₂O

5[Mg(H ₂O)(OH) ₂]·Mg(H ₂O) ₃Cl ₂→5[Mg(H ₂O)(OH) ₂]·Mg(H ₂O) ₂Cl ₂+H ₂O

5[Mg(H ₂O)(OH) ₂]·Mg(H ₂O) ₂Cl ₂→5Mg(OH) ₂·Mg(H ₂O) ₂Cl ₂+5H ₂O

5Mg(OH) ₂·Mg(H ₂O) ₂Cl ₂→3Mg(OH) ₂·Mg(H ₂O) ₂Cl ₂+2H ₂O+2MgO

Subordinate phase thermal decomposition process (265 ℃-545 ℃):

3Mg(OH) ₂·Mg(H ₂O) ₂Cl ₂→3MgO·Mg(H ₂O) ₂Cl ₂+3H ₂O

3MgO·Mg(H ₂O) ₂Cl ₂→3MgO·Mg(OH)Cl+H ₂O+HCl

No matter be [5Mg (OH) ₂], [MgCl ₂8H ₂O], or 3 [Mg (OH) ₂], [MgCl ₂8H ₂O], when reaching more than 540 ℃, final degradation production is MgO and HCl, wherein Natural manganese dioxide is one of polished tile chemical ingredients, introduces in the raw material polished tile is not had influence; And 540 ℃ of HCl gases that begin to produce, to the polished tile of burning till fast influence greatly, the discharge of HCl gas can extend to the polished tile sintering temperature, thereby makes the foaming of porcelain base substrate and can't the production porcelain brick.

It is thus clear that for the waste residue of contacted abrading block, because it contains chlorine oxygen magnesium sticker, and is not suitable for producing common polished brick in porcelain character, but this specific character exactly can be used to produce foamed ceramics, classified use of the present invention can play the effect of maximizing favourable factors and minimizing unfavourable ones fully.

On the other hand, practice in the past shows, even the waste residue of contacted abrading block not fully in joining raw material, behind the powder process sintering, can reduce the physicochemical property of ceramic tile.The contriver discovers, be in the past with waste residue directly as basic material and other raw materials mix powder process, general technology controlling and process is a residue below 3% on all basic material ball milling to 250 orders (aperture: Φ 63 μ m) sieve; Less than Φ 63 μ m particle＞95%; So polishing solid impurity particle and other particles are all superfine, contact area is very big, reacts to each other rapidly; The little change of polishing slag ingredient fluctuation bring the production control process than great fluctuation process, thereby influence quality product.

And the present invention mixes it as basic material; But process behind the powder waste residue and other raw materials decomposite respectively; The powder particle is generally Φ 0.1-Φ 2mm, (aperture: 30%-40% on sieve Φ 0.42mm), most of particle diameter is about 0.4mm for 40 orders.Also be appreciated that into; Waste residue and other raw materials are contacted with bigger particle; In fact has isolation effect preferably; Sintering process can't provide the fused fully required time between particle fast, promptly can't reach theoretical sintering degree, so the not enough production control process that influences of the fluctuation of polishing slag ingredient and performance changes and the ceramic tile overall performance.

Can know that from above analysis the present invention is through the classified use to waste residue, and blended technology after the first powder process, can effectively utilize ceramic polishing waste residue, improves product quality stability.

Description of drawings

Fig. 1 is the process flow sheet of removal process of the present invention

Fig. 2 is the process flow sheet of step C of the present invention

Fig. 3 is a powder process blended synoptic diagram of the present invention

Embodiment

Referring to accompanying drawing.On the polished tile production line, at first be edge polisher before two platforms, be respectively 1 ^#Preceding edging and 2 ^#Preceding edging, the waste residue of generation is flushed to 1 by current ^#Recovery trench; Then get into and wipe operation off, have 1 ^#, 2 ^#, 3 ^#Three Slicking apparatus, the waste residue of generation is flushed to 1 equally ^#Recovery trench; Get into thick the throwing and the smart operation of throwing then, have 1 respectively ^#, 2 ^#Thick throwing machine and 1 ^#, 2 ^#Precision polisher, the waste residue of generation is flushed to 2 by current ^#Recovery trench; Be the back edging operation at last, have 1 ^#, 2 ^#Edge polisher behind two platforms, the waste residue of generation is flushed to 1 ^#Recovery trench.1 ^#The waste residue of recovery trench is last to get into 1 ^#Water treating pond, 2 ^#The waste residue of recovery trench is last to get into 2 ^#Water treating pond, for use after the press filt respectively.

1 ^#Waste residue in the water treating pond through deposition, press filt, forms the mud cake of water ratio about 23%.Its chemical ingredients changes with the original production prescription, can produce than big-difference.In general chemical ingredients is following:

SiO ₂

Al ₂O ₃

Fe ₂O ₃

CaO

MgO

K ₂O

Na ₂O

ZrO ₂

TiO ₂

IL

56.0～75.0

14.0～25.0

0～1.0

0～5.0

0～20.0

0.5～4.0

0.5～5.0

0～3.0

0～1.0

After its further oven dry, carry out formulating of recipe according to the chemical ingredients of each batch and the classification of the product of producing, add the kaolin of 10-25%, powder process after ball milling slurrying, storage becomes the powder of most of particle diameter about 0.4mm again.In Fig. 3, this powder is labeled as A, and conventional powder is labeled as B.Then with powder A with the ratio (weight ratio) that is no more than total amount 40% and powder material B mix, with common process moulding, drying, burn till, polish, process new micro-powdered polishing brick.

In the said process, main control parameters is following:

1. collect the polishing slag according to preparing burden ball milling, the control mud stability is crucial.Main control parameters is following:

Ball milling time: 12-15 hour

Ball milling fineness: 0.5-1.0/250 order

Mud speed rate: 20-50 second (50ml volt cup)

Proportion: 1.67-1.70g/cm ³

Mud stability: good

2. spray drying of slip powder process:

Mud is sent into the drying tower warm air drying through rampump, processes the powder with certain flowability and intensity.

Main control parameters is following:

Cat head inlet air temperature: 450-550 ℃

Temperature of outgoing air: 70-75 ℃

Powder water ratio: 5.5-6.5%

Powder granularity: 20-30%/40 orders

3. powder forming ingredient workshop section control:

Select suitable polishing ground-slag material to introduce ratio and product category, can keep existing production technique and not change, keep the currently available products assortment, enhance product performance, comparatively ideal introducing method and controlled variable are following:

The powder proportioning:

Ordinary production powder: 60%-100%

Polishing slag prescription powder: 40%-0%

Carry out powder according to said ratio and mix, send into press-molding, molding parameter is following:

Forming pressure: 400kg/cm ²

Press number of times: 3.5 times/min (CT7200 swaging machine, 2 of 800 * 800 specifications)

4. dry with burn till main control parameters:

Dry kiln is long: 160m, inner width: 2.4m

Drying cycle: 70min

Oven dry top temperature: 180 ℃

Calcining kiln is long: 160m, inner width: 2.4m

Firing period: 70min

Firing temperature: 1180 ℃

Through detecting, the product performance the key technical indexes is following:

Project	Product performance of the present invention	The usual prodn performance
			Water-intake rate	＜0.10％	＜0.50％
Folding strength	＞45Mpa	＞45Mpa
			Thermal shock resistance	150 ℃ of circulations are not split for 10 times	150 ℃ of circulations are not split for 10 times

It is thus clear that the present invention has no adverse effect to product performance, can be used for suitability for industrialized production.

Claims

1. the recycling method of ceramic tile polishing waste residue is characterized in that: it comprises the steps:

A, the polishing waste is divided into two categories according to whether it contacts the polishing block;

B, after homogenizing the polishing waste slag that has been in contact with the polishing grinding block, it is used to produce ceramic foam;

C, adding 10-25% (weight ratio) of clay to the polishing waste slag that has not been in contact with the polishing grinding block, and ball milling to make powder, the particles are Φ0.1-Φ2mm, 30%-40% powder on 40 mesh sieves, The prepared powder is added to the conventional powder in a ratio of no more than 40% (weight ratio), and is used for producing micropowder porcelain polished tiles.

2. The method for recycling ceramic tile polishing waste slag according to claim 1, characterized in that it is a better solution to use kaolin as clay in step C.