CN101948320A - Process for producing bauxite homogenized materials in rotary kiln - Google Patents
Process for producing bauxite homogenized materials in rotary kiln Download PDFInfo
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- CN101948320A CN101948320A CN 201010247185 CN201010247185A CN101948320A CN 101948320 A CN101948320 A CN 101948320A CN 201010247185 CN201010247185 CN 201010247185 CN 201010247185 A CN201010247185 A CN 201010247185A CN 101948320 A CN101948320 A CN 101948320A
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Abstract
The invention relates to a process for producing bauxite homogenized materials in a rotary kiln, which comprises the following steps: (1) crushing raw bauxite ores, then carrying out deironing processing on the obtained raw bauxite ores so as to obtain a material a; (2) mixing the material a with water, sodium carboxymethyl starch, aluminium dihydrogen phosphate and polymeric AlCl3, then carrying out ball-milling on the obtained mixture so as to obtain a clay material b, wherein the amount of the sodium carboxymethyl starch is 0.3 to 0.6 percent of that of the material a, the amount of the aluminium dihydrogen phosphate is 0.1 to 0.3 percent of that of the material a, the amount of the polymeric AlCl3 is 0.2 to 0.5 percent of that of the material a, and the amount of the water is 30 to 50 percent of that of the material a; and (3) carrying out dehydration, molding and drying on the clay material b sequentially, and then sending the dehydrated, molded and dried clay material b to the rotary kiln to calcine so as to obtain the bauxite homogenized material. The method of the invention rewrites the history that the bauxite homogenized materials can not be produced in the rotary kiln, and the cost of bauxite homogenized material per ton can be reduced by **-**, therefore, the method of the invention has remarkable economic benefits.
Description
Technical field
The technology of the present invention belongs to the refractory raw material production field, is specifically related to a kind of rotary kiln production technique of bauxitic clay homogenization material.
Background technology
Bauxitic clay homogenization material production technique is a kind of novel production process that China's refractory raw material grew up in nearly 2 years.General production technique be with the bauxitic clay raw ore through levigate, proportioning, homogenizing, moulding and be sintered into the homogeneous grog because its index is stable, dependable performance can artificially change composition, can replace traditional bauxitic clay grog fully, and Al
2O
3The bauxitic clay homogenization material that content is high even can replace brown corundum, white fused alumina and use, cost performance is high, thereby is applied fast.
Because bauxitic clay belongs to lean property refractory raw material, water content when material is heated, is understood a large amount of dehydrations, very easily efflorescence in 400～900 ℃ of scopes about 13%.Produce the bauxitic clay homogenization material if adopt rotary kiln, under the dynamic producing condition of rotary kiln rotation, rolling resistance in addition, its powder phenomenon-tion is very serious, thereby cause powder, particle in the bauxitic clay homogenization material finished product many especially, can't satisfy the demanding criteria of market bauxitic clay homogenization material product.Thereby at present domestic manufacturer all adopts down-draft kiln, shuttle kiln and tunnel furnace to produce the bauxitic clay homogenization material, and output is big, energy-conservation good and use the most general rotary kiln can't be used for producing the bauxitic clay homogenization material, has caused the wasting of resources.
Summary of the invention
The object of the invention is to provide a kind of rotary kiln production technique of bauxitic clay homogenization material, and powder in the gained bauxitic clay homogenization material, particle are few, even do not have powder, particle.
For achieving the above object, the present invention adopts following technical scheme:
A kind of rotary kiln production technique of bauxitic clay homogenization material may further comprise the steps:
1. with after the fragmentation of bauxitic clay rawore, handle, get material a through deironing;
2. with material a and water, sodium starch glycolate, aluminium dihydrogen phosphate and polymerization AlCl
3Mix, ball milling gets pug b then, and described sodium starch glycolate add-on is 0.3～0.6% of a material a weight, and the aluminium dihydrogen phosphate add-on is 0.1～0.3% of a material a weight, polymerization AlCl
3Add-on is 0.2～0.5% of a material a weight, and the add-on of water is 30～50% of a material a weight;
3. with pug b after dehydration, moulding, oven dry, send in the rotary kiln and calcine, the bauxitic clay homogenization material.
Above-mentioned steps 1. can for: the bauxitic clay rawore respectively after jaw crusher, roll crusher fragmentation, is handled through the tramp iron separator deironing again, particle diameter smaller or equal to the material a of 5mm.
2. above-mentioned steps can get pug b by ball milling 5～8h in ball mill by wet process.
Above-mentioned steps 3. can for: pug b is dewatered in mud press (5～15min) mud cake, with mud cake through de-airing extruder (vacuum tightness be 0.07～0.2Mpa) push and cut moulded pottery not yet put in a kiln to bake, moulded pottery not yet put in a kiln to bake is sent to drying machine behind 100～200 ℃ of drying 2～5h, send in the rotary kiln and calcine 3～6h, promptly get the bauxitic clay homogenization material at 1500～1560 ℃.
Beneficial effect of the present invention:
The present invention has added sodium starch glycolate, aluminium dihydrogen phosphate and the polymerization AlCl as binding agent in raw material
3Wherein sodium starch glycolate can make behind the ball milling bauxitic clay powder pug bonding firmly, very easily moulding, and it is not cracked in each operation of transportation, batch turning and rolling before entering 400 ℃ of calcinings of rotary kiln (rotary kiln branch preheating zone, branch ungird and clinkering zone, and its temperature is risen progressively successively); Aluminium dihydrogen phosphate and polymerization AlCl
3Can make the not efflorescence, cracked in 400～1200 ℃ of calcined dehydrations and rolling resistance process of bauxitic clay pug.When the bauxitic clay calcining temperature reaches after 1200 ℃, owing to produce the mullite phase, bauxitic clay has begun sintering and has had higher-strength, and no longer produces efflorescence and cracked phenomenon.Sodium starch glycolate can decompose volatilization at 450 ℃, has only the residual of denier, so to the not influence of bauxitic clay homogenization material quality.Aluminium dihydrogen phosphate and polymerization AlCl
3Similar because of its composition to the bauxitic clay homogenization material, not only can not influence the quality of bauxitic clay homogenization material, can improve, improve the performance such as thermal shock resistance, physical strength of bauxitic clay homogenization material on the contrary.
Sodium starch glycolate, aluminium dihydrogen phosphate and polymerization AlCl
3On market, very easily bought, and cheap.One ton of bauxitic clay homogenization material of every production, total consumption of three is 0.8～1.2%.Calculate by current market value, one ton of bauxitic clay homogenization material of every production, the cost of required binding agent is about 30 yuan, and rotary kiln is produced the bauxitic clay homogenization material and is produced the bauxitic clay homogenization material with modes such as down-draft kiln, shuttle kiln, tunnel furnace and compare, the production cost of bauxitic clay homogenization material per ton is low 50～150 yuan, therefore adopts rotary kiln to produce bauxitic clay homogenization material cost and still is lower than the mode of production that adopts down-draft kiln, shuttle kiln, tunnel furnace etc. (per ton reduce production costs 20～120 yuan).In addition, the binding agent of adding has also improved the quality quality of bauxitic clay homogenization material product.Binding agent by weight and the bauxitic clay raw material add the ball mill ball milling together, aborning the operation very the facility.
The present invention proves through small test and production practice repeatedly, can solve powder, particle problem (powder, particle content are lower than 3wt%) substantially, thereby rewrite the history that rotary kiln can not be produced the bauxitic clay homogenization material, remarkable in economical benefits.Can use at most, promote the use of on the rotary kiln the most widely in the refractory raw material industry at present at home.
Embodiment
The present invention is described further by the following examples, but protection scope of the present invention is not limited thereto.
Embodiment 1
A kind of rotary kiln production technique of bauxitic clay homogenization material may further comprise the steps:
1. with the bauxitic clay rawore respectively after jaw crusher, roll crusher fragmentation, handle through the tramp iron separator deironing again, particle diameter be the material a of 5mm;
2. with material a and water, sodium starch glycolate, aluminium dihydrogen phosphate and polymerization AlCl
3Mix, ball milling 5h gets pug b in ball mill by wet process then; The sodium starch glycolate add-on is 0.3% of a material a weight, and the aluminium dihydrogen phosphate add-on is 0.3% of a material a weight, polymerization AlCl
3Add-on is 0.2% of a material a weight, and the add-on of water is 30% of a material a weight;
3. the 5min that pug b dewatered in mud press gets mud cake, with mud cake through vacuum tightness be the de-airing extruder extruding of 0.07Mpa and cut moulded pottery not yet put in a kiln to bake, moulded pottery not yet put in a kiln to bake is sent to drying machine behind 100 ℃ of dry 5h, sends in the rotary kiln and calcine 6h, get the bauxitic clay homogenization material at 1500 ℃.
The bauxitic clay homogenization material that obtains is crossed the standard sieve of aperture less than 10mm, and powder, particle content are 1.8%.
Embodiment 2
A kind of rotary kiln production technique of bauxitic clay homogenization material may further comprise the steps:
1. with the bauxitic clay rawore respectively after jaw crusher, roll crusher fragmentation, handle through the tramp iron separator deironing again, particle diameter be the material a of 1mm;
2. batching is ground: with material a and water, sodium starch glycolate, aluminium dihydrogen phosphate and polymerization AlCl
3Mix, ball milling 8h gets pug b in ball mill by wet process then; The sodium starch glycolate add-on is 0.6% of a material a weight, and the aluminium dihydrogen phosphate add-on is 0.1% of a material a weight, polymerization AlCl
3Add-on is 0.5% of a material a weight, and the add-on of water is 50% of a material a weight;
3. the 15min that pug b dewatered in mud press gets mud cake, with mud cake through vacuum tightness be the de-airing extruder extruding of 0.2Mpa and cut moulded pottery not yet put in a kiln to bake, moulded pottery not yet put in a kiln to bake is sent to drying machine behind 200 ℃ of dry 2h, sends in the rotary kiln and calcine 3h, get the bauxitic clay homogenization material at 1560 ℃.
The bauxitic clay homogenization material that obtains is crossed the standard sieve of aperture less than 10mm, and powder, particle content are 2.8%.
Embodiment 3
A kind of rotary kiln production technique of bauxitic clay homogenization material may further comprise the steps:
1. with the bauxitic clay rawore respectively after jaw crusher, roll crusher fragmentation, handle through the tramp iron separator deironing again, particle diameter be the material a of 3mm;
2. batching is ground: with material a and water, sodium starch glycolate, aluminium dihydrogen phosphate and polymerization AlCl
3Mix, ball milling 6h gets pug b in ball mill by wet process then; The sodium starch glycolate add-on is 0.4% of a material a weight, and the aluminium dihydrogen phosphate add-on is 0.3% of a material a weight, polymerization AlCl
3Add-on is 0.3% of a material a weight, and the add-on of water is 40% of a material a weight;
3. the 10min that pug b dewatered in mud press gets mud cake, with mud cake through vacuum tightness be the de-airing extruder extruding of 0.14Mpa and cut moulded pottery not yet put in a kiln to bake, moulded pottery not yet put in a kiln to bake is sent to drying machine behind 130 ℃ of dry 4h, sends in the rotary kiln and calcine 4.5h, get the bauxitic clay homogenization material at 1530 ℃.
The bauxitic clay homogenization material that obtains is crossed the standard sieve of aperture less than 10mm, and powder, particle content are 0.6%.
Claims (3)
1. the rotary kiln production technique of a bauxitic clay homogenization material is characterized in that, may further comprise the steps:
1. with after the fragmentation of bauxitic clay rawore, handle, get material a through deironing;
2. with material a and water, sodium starch glycolate, aluminium dihydrogen phosphate and polymerization AlCl
3Mix, ball milling gets pug b then; Described sodium starch glycolate add-on is 0.3～0.6% of a material a weight, and the aluminium dihydrogen phosphate add-on is 0.1～0.3% of a material a weight, polymerization AlCl
3Add-on is 0.2～0.5% of a material a weight, and the add-on of water is 30～50% of a material a weight;
3. with pug b after dehydration, moulding, oven dry, send in the rotary kiln and calcine, the bauxitic clay homogenization material.
2. the rotary kiln production technique of bauxitic clay homogenization material according to claim 1, it is characterized in that, described step 1. in the bauxitic clay rawore respectively after jaw crusher, roll crusher fragmentation, handle through the tramp iron separator deironing again, particle diameter smaller or equal to the material a of 5mm; Described step 2. in ball mill by wet process ball milling 5～8h get pug b.
3. the rotary kiln production technique of bauxitic clay homogenization material as claimed in claim 1 or 2, it is characterized in that, described step 3. in pug b in mud press, dewater mud cake, with mud cake through de-airing extruder extruding and cut moulded pottery not yet put in a kiln to bake, moulded pottery not yet put in a kiln to bake is sent to drying machine behind 100～200 ℃ of drying 2～5h, send in the rotary kiln and calcine 3～6h, get the bauxitic clay homogenization material at 1500～1560 ℃.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278362A (en) * | 2013-06-03 | 2013-09-04 | 山东省冶金科学研究院 | Set of alum clay standard samples and preparation method thereof |
| CN103613397A (en) * | 2013-12-09 | 2014-03-05 | 攀枝花钢城集团有限公司 | Ladle bottom working layer castable and preparation method thereof. |
| CN106588040A (en) * | 2016-11-14 | 2017-04-26 | 河南容安热工新材料有限公司 | Bauxite slag removing and purifying production technology |
| CN112142084A (en) * | 2020-08-04 | 2020-12-29 | 广西锋华环保科技有限公司 | Method for preparing polyaluminum chloride flocculant by using bauxite |
| CN115010504A (en) * | 2022-05-11 | 2022-09-06 | 郑州大学 | Method for preparing high-strength bauxite-based mullite homogeneous material by two-step method |
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| CN101050126A (en) * | 2007-05-24 | 2007-10-10 | 洛阳鹏飞耐火材料有限公司 | Ceramics hanging boards of alumina in use for cement kiln, and preparation method |
| CN101121604A (en) * | 2007-07-25 | 2008-02-13 | 濮阳濮耐高温材料（集团）股份有限公司 | Method for producing alumina homogenization material |
| CN101570650A (en) * | 2008-04-30 | 2009-11-04 | 北京通达耐火技术股份有限公司 | Preparation method for wear resistant fire-retardant coating |
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2010
- 2010-08-06 CN CN 201010247185 patent/CN101948320A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050126A (en) * | 2007-05-24 | 2007-10-10 | 洛阳鹏飞耐火材料有限公司 | Ceramics hanging boards of alumina in use for cement kiln, and preparation method |
| CN101121604A (en) * | 2007-07-25 | 2008-02-13 | 濮阳濮耐高温材料（集团）股份有限公司 | Method for producing alumina homogenization material |
| CN101570650A (en) * | 2008-04-30 | 2009-11-04 | 北京通达耐火技术股份有限公司 | Preparation method for wear resistant fire-retardant coating |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278362A (en) * | 2013-06-03 | 2013-09-04 | 山东省冶金科学研究院 | Set of alum clay standard samples and preparation method thereof |
| CN103278362B (en) * | 2013-06-03 | 2015-07-15 | 山东省冶金科学研究院 | Set of alum clay standard samples and preparation method thereof |
| CN103613397A (en) * | 2013-12-09 | 2014-03-05 | 攀枝花钢城集团有限公司 | Ladle bottom working layer castable and preparation method thereof. |
| CN103613397B (en) * | 2013-12-09 | 2015-08-26 | 攀枝花钢城集团有限公司 | Bottom of steel ladle working lining mould material and preparation method thereof |
| CN106588040A (en) * | 2016-11-14 | 2017-04-26 | 河南容安热工新材料有限公司 | Bauxite slag removing and purifying production technology |
| CN112142084A (en) * | 2020-08-04 | 2020-12-29 | 广西锋华环保科技有限公司 | Method for preparing polyaluminum chloride flocculant by using bauxite |
| CN115010504A (en) * | 2022-05-11 | 2022-09-06 | 郑州大学 | Method for preparing high-strength bauxite-based mullite homogeneous material by two-step method |
| CN115010504B (en) * | 2022-05-11 | 2022-12-30 | 郑州大学 | Method for preparing high-strength bauxite-based mullite homogeneous material by two-step method |
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Application publication date: 20110119 |