CN106673673A - Method for producing refractory brick based on polished slag - Google Patents

Abstract

The invention relates to a method for producing refractory brick based on polished slag, which belongs to the technical field of production of refractory bricks. The polished slag is taken as a basic material, sodium silicate is formed by silica and sodium carbonate in polished slag under high temperature, the substances such as alumina and magnesium salt in the polished slag can be dissolved by sulfuric acid, under effect of lauryl trimethyl ammonium bromide, silicic acid radical and aluminium ions are combined to form alumina silicate, under effect of a chelating agent and a silane coupling agent, alumina silicate and metal ions such as magnesium ions are combined, high temperature resistance performance is enhanced, montmorillonite is used as a bonding substance, so that the refractory brick is produced. The component of the polished slag is taken as a reaction raw material for self-reaction to obtain the refractory brick raw material, and the problems that the utilization rate of the polished brick slag is not high, environment pollution is generated, and the intensity of the traditional refractory bricks is not high can be solved. The refractory brick has the advantages of high intensity, difficult cracking, and prolongation of usage life.

Description

A kind of method that refractory brick is prepared based on polishing slag

Technical field

The present invention relates to a kind of method for preparing refractory brick based on polishing slag, belongs to refractory brick preparing technical field.

Background technology

Refractory brick is suitable for the liner of the molten metal containers such as converter, ladle, fusion reducing furnace, or blast furnace tap hole Filler, be installed on continuous casting equipment etc., and nonferrous metal melting furnace crucible etc..For manufacturing what such use was used The compositionss of refractory brick generally by being matched with refractory aggregate using binding agent as adhesive, passed through Simpson's puddle mixer, The kneading devices such as the strange formula blender of mixer, Airy, quick kneading machine, sand muller are kneaded and prepared.Then passing through will Said composition hydraulic press, friction press, vacuum press-forming machine, isostatic pressing machine etc. shape post-heating to be dried hardening or burn System, it is possible to obtain refractory brick, in refractory brick compositionss, the amount of the adhesive coordinated relative to refractory aggregate is typically less, It is difficult to for adhesive to be uniformly dispersed mixing relative to refractory aggregate.Therefore, when by such refractory brick with compositionss shape and During manufacture refractory brick, it is difficult to combine refractory aggregate by adhesive high intensity.Then, there is refractory brick and be heated to high temperature The problem that Shi Fasheng bursts or is cracked etc. with regard to thermal shock, or there is a problem of that the intensity of the refractory brick such as compressive strength is not enough.

In the various product for firing Wall or floor tile, polished bricks belong to high-end product.Polished bricks are during grinding, polishing Substantial amounts of waste residues of polished tiles can be produced, this waste residues of polished tiles is mainly the silicate such as silicon dioxide, Anhydrite composition, and feature is grain Degree is very thin, intensity is high, without organic matter, lack viscosity, the unsuitable soil as plantation, in dispersity after air-drying, easily with Wind descends slowly and lightly to everywhere, can seriously threaten the healthy of surrounding population, and causes the hardened of periphery soil, causes serious environment Pollution.And the landfill of waste residues of polished tiles, not only labor intensive, material resources, can also polluted underground water matter, according to statistics, manufacture 1 square metre The big appointment of polished bricks form 2.1 kilograms or so of waste residues of polished tiles.Therefore, the recycling of waste residues of polished tiles is always ability The difficult problem that field technique personnel are tackled key problems, although have for firing porous filtering Ceramic Tiles, produce Ceramic Tiles, prepare silicate cement Mud, prepare devitrified glass etc. and be seen in report about the recovery and utilization technology and technique of waste residues of polished tiles, but there is complex process, High cost, easily causes secondary pollution problems, and it has substantive breakthroughs using Bing No, and actual utilization of waste residues of polished tiles is still to throw The a great problem of Guang Zhuan manufacturing enterprises.The research for producing refractory brick and its processing technology in particular with waste residues of polished tiles still belongs to empty White , also No have any technology to be adapted by one skilled in the art.

The content of the invention

The technical problem to be solved：It is not high for traditional refractory brick intensity, its service life is shortened, and Existing waste residues of polished tiles utilization rate is not high, the problem to environment, the present invention using waste residues of polished tiles as base material, Silicon dioxide under high temperature in waste residues of polished tiles forms sodium silicate with sodium carbonate, reuse sulphuric acid by the aluminium oxide in polished bricks, The materials such as magnesium salt dissolve, and under Dodecyl trimethyl ammonium chloride effect, silicate combines to form aluminium silicate with aluminium ion, in chela In the presence of mixture and silane coupler, the metal ion such as aluminium silicate and magnesium ion is combined, and increases high temperature resistant degree, using montmorillonite Used as material is cohered, so as to refractory brick is obtained, the present invention carries out autoreaction by the use of the composition of waste residues of polished tiles as reaction raw materials, Refractory brick raw material is obtained, it is not high to solve waste residues of polished tiles utilization rate, to environment, and traditional refractory brick intensity is not high Problem.Refractory brick intensity prepared by the present invention is high, not easy to crack, extends its service life.

To solve above-mentioned technical problem, the technical solution used in the present invention is：

（1）Take waste residues of polished tiles to be put in the water of 2~3 times of its quality, with 200r/min stir 20~30min after stand 10~ 15min, removes the impurity of floating on water, then residue is spray-dried, and dried object is collected, by dried object and dry matter The sodium carbonate of amount 30~35% is put in mill, is milled 30~40min with 150r/min；

（2）After above-mentioned end of milling, the mixture in mill is put in calcining furnace, design temperature is 900~1100 DEG C, 1~2h of calcining, then calcined material is put in ball grinder, by ratio of grinding media to material 30:1, the steel ball of a diameter of 50mm is added, with 300r/min 40~50min of ball milling, crosses 300 mesh sieves, collects the granule that sieves；

（3）Count by weight, take sulfuric acid solution that 40~45 parts of above-mentioned granules that sieve, 50~55 parts of mass fractions are 15%, 11~14 parts of VTESs, 7~9 parts of Dodecyl trimethyl ammonium chloride and 4~6 parts of ethylenediaminetetraacetic acid, will Above-mentioned sieve granule and the sulfuric acid solution that mass fraction is 15% in parts by weight, in being put into reactor, design temperature is 60 ~70 DEG C, with 150r/min 3~4h of stirring reaction；

（4）After above-mentioned stirring reaction terminates, the trimethyl in above-mentioned parts by weight is added in reactor successively Ammonium bromide, VTES and ethylenediaminetetraacetic acid, boost to 0.2~0.4MPa, are warming up to 80~85 DEG C, stirring 1~3h of reaction, after naturally cooling to room temperature, discharging is filtered to going out material, using distilled water wash filtering residue to after washing Filtering residue after washing is put in air-dry machine and is air-dried by cleaning mixture in neutrality, is collected and is air-dried thing, obtains refractory brick base material；

（5）Count by weight, take 40~45 parts of above-mentioned refractory brick base materials, 17~22 parts of water, 12~14 part of 400 mesh montmorillonite Grain, 7~9 parts of sodium humates and 3~5 parts of rosin soaps, are put in blender and stir, and still aging 1~2 day, obtain compound, And compound is put in mould, then mould is placed in extruder to compound extrusion molding, subsequently by mould natural drying 1 After~2 days, mould is put in sintering furnace, design temperature is 1300~1380 DEG C, sinters 36~46h, naturally cools to room temperature, Mould is taken out into the demoulding, demoulding thing is collected, you can refractory brick is obtained.

Prepared by the present invention prepares refractory brick refractoriness and reaches 1700~1900 DEG C based on polishing slag, cold crushing strength Reach more than 85MPa, reheat linear change（1700 DEG C, 2h）For 0.1~0.2%, heat conductivity is less than 0.17W/mk when 800 DEG C.

Compared with additive method, Advantageous Effects are the present invention：

（1）The refractory brick refractoriness prepared based on polishing slag prepared by the present invention reaches 1700~1900 DEG C, can extensively apply In the liner and its nonferrous metal fields such as melting furnace crucible of the molten metal containers such as converter, fusion reducing furnace；

（2）The present invention prepare based on polishing slag prepare refractory brick intensity it is higher, cold crushing strength reach 85MPa with On, extend its service life；

（3）Refractory brick based on polishing slag preparation prepared by the present invention improves mainly with waste residues of polished tiles as primary raw material Its utilization ratio, will not pollute to environment.

Specific embodiment

Waste residues of polished tiles is taken first to be put in the water of 2~3 times of its quality, is stirred with 200r/min and stood after 20~30min 10~15min, removes the impurity of floating on water, then residue is spray-dried, and dried object is collected, by dried object and drying The sodium carbonate of amount of substance 30~35% is put in mill, is milled 30~40min with 150r/min；After above-mentioned end of milling, Mixture in mill is put in calcining furnace, design temperature is 900~1100 DEG C, calcines 1~2h, then calcined material is put into In ball grinder, by ratio of grinding media to material 30:1, the steel ball of a diameter of 50mm is added, with 300r/min 40~50min of ball milling, 300 mesh sieves are crossed, Collection is sieved granule；Count by weight, take the sulphuric acid that 40~45 parts of above-mentioned granules that sieve, 50~55 parts of mass fractions are 15% Solution, 11~14 parts of VTESs, 7~9 parts of Dodecyl trimethyl ammonium chloride and 4~6 parts of ethylenediamine tetrems Acid, by above-mentioned granule and the sulfuric acid solution that mass fraction is 15%, in being put into reactor, design temperature of sieving in parts by weight For 60~70 DEG C, with 150r/min 3~4h of stirring reaction；Then after above-mentioned stirring reaction terminates, add in reactor successively Enter Dodecyl trimethyl ammonium chloride in above-mentioned parts by weight, VTES and ethylenediaminetetraacetic acid, boosting To 0.2~0.4MPa, 80~85 DEG C are warming up to, 1~3h of stirring reaction after naturally cooling to room temperature, discharges, and carries out to going out material Filter, using cleaning mixture of the distilled water wash filtering residue to after washing in neutrality, the filtering residue after washing be put in air-dry machine and air-dried, Collect and air-dry thing, obtain refractory brick base material；Finally count by weight, take 40~45 parts of above-mentioned refractory brick base materials, 17~22 parts of water, 12~14 part of 400 mesh montmorillonite granule, 7~9 parts of sodium humates and 3~5 parts of rosin soaps, are put in blender and stir, quiet Put ageing 1~2 day, obtain compound, and compound is put in mould, then mould is placed in extruder compound is squeezed into Type, subsequently by mould natural drying 1~2 day after, mould is put in sintering furnace, design temperature be 1300~1380 DEG C, sintering 36~46h, naturally cools to room temperature, and mould is taken out into the demoulding, collects demoulding thing, you can obtain refractory brick.

Example 1

Waste residues of polished tiles is taken first to be put in the water of 3 times of its quality, to stand 15min after 200r/min stirring 30min, goes eliminating water The impurity of face floating, then residue is spray-dried, dried object is collected, by dried object and the carbonic acid of dried object quality 35% Sodium is put in mill, is milled 40min with 150r/min；After above-mentioned end of milling, the mixture in mill is put into and is forged In burning stove, design temperature is 1100 DEG C, calcines 2h, then calcined material is put in ball grinder, by ratio of grinding media to material 30:1, add a diameter of The steel ball of 50mm, with 300r/min ball milling 50min, crosses 300 mesh sieves, collects the granule that sieves；Count by weight, take 45 parts it is above-mentioned Sieve sulfuric acid solution, 14 parts of VTESs, the 9 parts of dodecyl front threes that granule, 55 parts of mass fractions are 15% Base ammonium bromide and 6 parts of ethylenediaminetetraacetic acid, the above-mentioned granule that sieves in parts by weight is molten with the sulphuric acid that mass fraction is 15% Liquid, in being put into reactor, design temperature is 70 DEG C, with 150r/min stirring reactions 4h；Then after above-mentioned stirring reaction terminates, Add Dodecyl trimethyl ammonium chloride in above-mentioned parts by weight, VTES and second in reactor successively Ethylenediamine tetraacetic acid (EDTA), boosts to 0.4MPa, is warming up to 85 DEG C, and stirring reaction 3h after naturally cooling to room temperature, discharges, to going out material Filtered, using cleaning mixture of the distilled water wash filtering residue to after washing in neutrality, the filtering residue after washing is put in air-dry machine Air-dry, collect and air-dry thing, obtain refractory brick base material；Finally count by weight, take 45 parts of above-mentioned refractory brick base materials, 22 parts of water, 14 400 mesh montmorillonite granules of part, 9 parts of sodium humates and 5 parts of rosin soaps, are put in blender and stir, and still aging 2 days, obtain Compound, and compound is put in mould, then mould is placed in extruder to compound extrusion molding, subsequently by mould from After right dry in the sun 2 days, mould is put in sintering furnace, design temperature is 1380 DEG C, sinters 46h, room temperature is naturally cooled to, by mould The demoulding is taken out, demoulding thing is collected, you can refractory brick is obtained.

After testing, what prepared by the present invention prepares refractory brick refractoriness and reaches 1700 DEG C based on polishing slag, the resistance to pressure of room temperature Degree reaches 86MPa, reheat linear change（1700 DEG C, 2h）For 0.2%, heat conductivity is 0.16W/mk when 800 DEG C.

Example 2

Waste residues of polished tiles is taken first to be put in the water of 2 times of its quality, to stand 10min after 200r/min stirring 20min, goes eliminating water The impurity of face floating, then residue is spray-dried, dried object is collected, by dried object and the carbonic acid of dried object quality 30% Sodium is put in mill, is milled 30min with 150r/min；After above-mentioned end of milling, the mixture in mill is put into and is forged In burning stove, design temperature is 900 DEG C, calcines 1h, then calcined material is put in ball grinder, by ratio of grinding media to material 30:1, add a diameter of The steel ball of 50mm, with 300r/min ball milling 40min, crosses 300 mesh sieves, collects the granule that sieves；Count by weight, take 40 parts it is above-mentioned Sieve sulfuric acid solution, 11 parts of VTESs, the 7 parts of dodecyl front threes that granule, 50 parts of mass fractions are 15% Base ammonium bromide and 4 parts of ethylenediaminetetraacetic acid, the above-mentioned granule that sieves in parts by weight is molten with the sulphuric acid that mass fraction is 15% Liquid, in being put into reactor, design temperature is 60 DEG C, with 150r/min stirring reactions 3h；Then after above-mentioned stirring reaction terminates, Add Dodecyl trimethyl ammonium chloride in above-mentioned parts by weight, VTES and second in reactor successively Ethylenediamine tetraacetic acid (EDTA), boosts to 0.2MPa, is warming up to 80 DEG C, and stirring reaction 1h after naturally cooling to room temperature, discharges, to going out material Filtered, using cleaning mixture of the distilled water wash filtering residue to after washing in neutrality, the filtering residue after washing is put in air-dry machine Air-dry, collect and air-dry thing, obtain refractory brick base material；Finally count by weight, take 40 parts of above-mentioned refractory brick base materials, 17 parts of water, 12 400 mesh montmorillonite granules of part, 7 parts of sodium humates and 3 parts of rosin soaps, are put in blender and stir, and still aging 1 day, obtain Compound, and compound is put in mould, then mould is placed in extruder to compound extrusion molding, subsequently by mould from After right dry in the sun 1 day, mould is put in sintering furnace, design temperature is 1300 DEG C, sinters 36h, room temperature is naturally cooled to, by mould The demoulding is taken out, demoulding thing is collected, you can refractory brick is obtained.

After testing, what prepared by the present invention prepares refractory brick refractoriness and reaches 1900 DEG C based on polishing slag, the resistance to pressure of room temperature Degree reaches 88MPa, reheat linear change（1700 DEG C, 2h）For 0.1%, heat conductivity is 0.15W/mk when 800 DEG C.

Example 3

Waste residues of polished tiles is taken first to be put in the water of 2 times of its quality, to stand 12min after 200r/min stirring 25min, goes eliminating water The impurity of face floating, then residue is spray-dried, dried object is collected, by dried object and the carbonic acid of dried object quality 32% Sodium is put in mill, is milled 35min with 150r/min；After above-mentioned end of milling, the mixture in mill is put into and is forged In burning stove, design temperature is 1000 DEG C, calcines 1h, then calcined material is put in ball grinder, by ratio of grinding media to material 30:1, add a diameter of The steel ball of 50mm, with 300r/min ball milling 45min, crosses 300 mesh sieves, collects the granule that sieves；Count by weight, take 42 parts it is above-mentioned Sieve sulfuric acid solution, 12 parts of VTESs, the 8 parts of dodecyl front threes that granule, 52 parts of mass fractions are 15% Base ammonium bromide and 5 parts of ethylenediaminetetraacetic acid, the above-mentioned granule that sieves in parts by weight is molten with the sulphuric acid that mass fraction is 15% Liquid, in being put into reactor, design temperature is 65 DEG C, with 150r/min stirring reactions 4h；Then after above-mentioned stirring reaction terminates, Add Dodecyl trimethyl ammonium chloride in above-mentioned parts by weight, VTES and second in reactor successively Ethylenediamine tetraacetic acid (EDTA), boosts to 0.3MPa, is warming up to 82 DEG C, and stirring reaction 2h after naturally cooling to room temperature, discharges, to going out material Filtered, using cleaning mixture of the distilled water wash filtering residue to after washing in neutrality, the filtering residue after washing is put in air-dry machine Air-dry, collect and air-dry thing, obtain refractory brick base material；Finally count by weight, take 42 parts of above-mentioned refractory brick base materials, 20 parts of water, 13 400 mesh montmorillonite granules of part, 8 parts of sodium humates and 4 parts of rosin soaps, are put in blender and stir, and still aging 1 day, obtain Compound, and compound is put in mould, then mould is placed in extruder to compound extrusion molding, subsequently by mould from After right dry in the sun 1 day, mould is put in sintering furnace, design temperature is 1320 DEG C, sinters 40h, room temperature is naturally cooled to, by mould The demoulding is taken out, demoulding thing is collected, you can refractory brick is obtained.

After testing, what prepared by the present invention prepares refractory brick refractoriness and reaches 1800 DEG C based on polishing slag, the resistance to pressure of room temperature Degree reaches 86MPa, reheat linear change（1700 DEG C, 2h）For 0.15%, heat conductivity is 0.14W/mk when 800 DEG C.

Claims (1)

1. a kind of method that refractory brick is prepared based on polishing slag, it is characterised in that concrete preparation process is：

（1）Take waste residues of polished tiles to be put in the water of 2~3 times of its quality, with 200r/min stir 20~30min after stand 10~ 15min, removes the impurity of floating on water, then residue is spray-dried, and dried object is collected, by dried object and dry matter The sodium carbonate of amount 30~35% is put in mill, is milled 30~40min with 150r/min；

（2）After above-mentioned end of milling, the mixture in mill is put in calcining furnace, design temperature is 900~1100 DEG C, 1~2h of calcining, then calcined material is put in ball grinder, by ratio of grinding media to material 30:1, the steel ball of a diameter of 50mm is added, with 300r/min 40~50min of ball milling, crosses 300 mesh sieves, collects the granule that sieves；

（3）Count by weight, take sulfuric acid solution that 40~45 parts of above-mentioned granules that sieve, 50~55 parts of mass fractions are 15%, 11~14 parts of VTESs, 7~9 parts of Dodecyl trimethyl ammonium chloride and 4~6 parts of ethylenediaminetetraacetic acid, will Above-mentioned sieve granule and the sulfuric acid solution that mass fraction is 15% in parts by weight, in being put into reactor, design temperature is 60 ~70 DEG C, with 150r/min 3~4h of stirring reaction；

（4）After above-mentioned stirring reaction terminates, the trimethyl in above-mentioned parts by weight is added in reactor successively Ammonium bromide, VTES and ethylenediaminetetraacetic acid, boost to 0.2~0.4MPa, are warming up to 80~85 DEG C, stirring 1~3h of reaction, after naturally cooling to room temperature, discharging is filtered to going out material, using distilled water wash filtering residue to after washing Filtering residue after washing is put in air-dry machine and is air-dried by cleaning mixture in neutrality, is collected and is air-dried thing, obtains refractory brick base material；

（5）Count by weight, take 40~45 parts of above-mentioned refractory brick base materials, 17~22 parts of water, 12~14 part of 400 mesh montmorillonite Grain, 7~9 parts of sodium humates and 3~5 parts of rosin soaps, are put in blender and stir, and still aging 1~2 day, obtain compound, And compound is put in mould, then mould is placed in extruder to compound extrusion molding, subsequently by mould natural drying 1 After~2 days, mould is put in sintering furnace, design temperature is 1300~1380 DEG C, sinters 36~46h, naturally cools to room temperature, Mould is taken out into the demoulding, demoulding thing is collected, you can refractory brick is obtained.