CN101712553A

CN101712553A - Production method of high refractorinees-under-load softening anti-strip high-alumina brick

Info

Publication number: CN101712553A
Application number: CN200910066275A
Authority: CN
Inventors: 宋金标; 宋禄峰; 宋彩红; 宋马峰; 樊建令; 卢中立; 付鸿正; 樊召峰; 郭英超; 胡彦超; 黄慧娟
Original assignee: ZHENGZHOU ZHENJIN REFRACTORY CO Ltd
Current assignee: ZHENGZHOU ZHENJIN REFRACTORY CO Ltd
Priority date: 2009-10-28
Filing date: 2009-10-28
Publication date: 2010-05-26

Abstract

The invention discloses a production method of a high refractorinees-under-load anti-strip high-alumina brick. The production method comprises the following steps of: (1) weighing 8.5 parts of bauxite, 1 part of zircon sand powder and 0.5 part of clay powder in parts by weight; (2) uniformly mixing the weighed materials, adding a lignin solution being 4-5 percent of the total weight of the materials into a wet mill, and sending the materials into a press machine for compressing and molding; and (3) drying an obtained semi-finished product in a drying chamber, then sintering the semi-finished product in a tunnel kiln and preserving heat for 10-12 hours at a temperature of 1,450+/-10 DEG C to obtain a finished brick. The service life of the brick in a novel dry method cement kiln preheating zone can reach longer than two years, and the service life of the brick in a novel dry method cement kiln transition zone can reach longer than one year. The brick has high refractorinees-under-load temperature, good thermal shock resistant stability and good wear resistance; and compared with products of the same class, the number of times of thermal shock stability (1,110 DEG C, water cooling) of the product can be increased by more than one time than that of an ordinary high-alumina brick.

Description

The production method of high RUL, anti-peeling high aluminium brick

Technical field

The present invention relates to cement kiln preheating zone, the used high alumina brick in transitional zone position, especially relate to the production method of a kind of high RUL, anti-peeling high aluminium brick.

Background technology

New type nonaqueous cement kiln preheating zone, transitional zone with high alumina brick because cheap (the high alumina brick price is about 4/7 of siliceous mullite brick, be about spinel brick 1/2), good in operative technique, the little cement production enterprise in kiln footpath is able to widespread use, but, common high alumina brick is because raw materials for production, production technique, restrictions such as production unit and production technology and material self character factor, work-ing life of cement rotary kiln transition belt no longer than 6 months, on the not high cement kiln of some operation factors even have only 2-3 month, the transitional zone kiln lining needed to change several times in 1 year, the user need often stop the kiln maintenance, and then cause the damage of other position lining bricks, the formation vicious cycle that goes round and begins again causes manufacturing enterprise's cost too high.

Summary of the invention

The object of the present invention is to provide the high RUL that can prolong a kind of work-ing life more than a times, the production method of anti-peeling high aluminium brick.

For achieving the above object, the present invention can take following technical proposals:

The production method of high RUL of the present invention, anti-peeling high aluminium brick comprises the steps:

The first step: take by weighing 3 parts in the bauxitic clay material of granularity 5-3mm by weight, 3 parts in the bauxitic clay material of 0.075mm＜granularity＜3mm, 2.5 parts in the bauxitic clay material of granularity≤0.075mm; 1 part of granularity≤0.12mm zircon sand powder, 0.5 part of the clay powder of granularity≤0.075mm;

Second step: above-mentioned mixing of materials is even, and the lignin liquor that adds material gross weight 4-5% in edge runner-wet mill mixing 15 minutes is sent into pressing machine, and under the condition of forming pressure greater than 400KN, extrusion forming obtains work in-process;

The 3rd step: at the kiln inner drying, drying temperature 〉=95 ℃ are no less than 24 hours time of drying with above-mentioned work in-process; Then with dried adobe in tunnel furnace under oxidizing atmosphere, 1450 ℃ ± 10 ℃ conditions sintering, and insulation 10-12 hour under 1450 ℃ ± 10 ℃ conditions can obtain the finished bricks body, the physical and chemical index of this finished bricks body is Al ₂O ₃(%) 〉=74, Fe ₂O ₃(%)≤1.2, ZrO ₂(%) 〉=6, refractoriness (℃) 〉=1790, volume density (g/cm ³) 〉=2.65, apparent porosity (%)≤21, cold crushing strength (MPa) 〉=70, refractoriness under load ℃ (0.2MPa, T0.6) 〉=1550, thermal shock resistance, inferior (1100 ℃, water-cooled) 〉=20 are in transitional zone life cycle 〉=12 month.

The standard of used bauxitic clay is Al ₂O ₃〉=80%, Fe ₂O ₃＜1.5%, CaO≤0.4%.

The standard of used zircon sand is Fe ₂O ₃＜0.30%, Zr ₂O ₃〉=65%.

The standard of used clay powder is Al ₂O ₃〉=42-50%, Fe ₂O ₃≤ 2%.

The invention has the advantages that this product can reach more than 2 years in the work-ing life of new type nonaqueous cement kiln preheating zone, can reach more than 1 year in the work-ing life of new type nonaqueous cement kiln transitional zone, can keep synchronous operation with the clinkering zone kiln lining, reduce and stopped the kiln frequency of maintenance.This product has advantages such as refractoriness under load height, anti-thermal shock good stability, wear resisting property be good.Compare the comparable common high alumina brick of its thermal shock resistance (1100 ℃, water-cooled) number of times than like product and double abovely, compare with the position, be more than the twice of common high alumina brick work-ing life.This product reaches 548 days with me in the matching used cycle of company's other products on the new type nonaqueous cement kiln of the daily output 2500T/D of Jiangsu crane woods company cement clinker, be the national record that still keeps so far; The new Cement Group company of China Yangxin second phase 6000T/D Dayao has been created 456 days the longest life cycle record of national similar kiln with this product, well beyond similar dry-process cement rotary kiln 6 months average life cycle of high alumina brick.High alumina brick physical and chemical index that the inventive method is produced and high alumina brick LZ-80 and high alumina brick LZ-75 physical and chemical index comparative result see the following form:

The title project	This product	High alumina brick LZ-80 (GB/T2988-2004)	High alumina brick LZ-75 (GB/T2988-2004)
The title project	This product	High alumina brick LZ-80 (GB/T2988-2004)	High alumina brick LZ-75 (GB/T2988-2004)	??Al ₂O ₃(％)	??≥74	??≥80	??≥75
??Fe ₂O ₃(％)	??≤1.2	??------	??------	??Al ₂O ₃(％)	??≥74	??≥80	??≥75
??Fe ₂O ₃(％)	??≤1.2	??------	??------	??ZrO ₂(％)	??≥6	??------	??------
Refractoriness (℃)	??≥1790	??------	??------	??ZrO ₂(％)	??≥6	??------	??------
Refractoriness (℃)	??≥1790	??------	??------	Volume density (g/cm ³)	??≥2.65	??------	??------
Apparent porosity (%)	??≤21	??≤22	??≤23	Volume density (g/cm ³)	??≥2.65	??------	??------
Apparent porosity (%)	??≤21	??≤22	??≤23	Cold crushing strength (MPa)	??≥70	??≥55	??≥50
Refractoriness under load ℃ (0.2MPa, T0.6)	??≥1550	??≥1530	??≥1520	Cold crushing strength (MPa)	??≥70	??≥55	??≥50
Refractoriness under load ℃ (0.2MPa, T0.6)	??≥1550	??≥1530	??≥1520	Thermal shock resistance, inferior (1100 ℃, water-cooled)	??≥20	??------	??------
In transitional zone life cycle (moon)	〉=12 months	4-6 month	??------	Thermal shock resistance, inferior (1100 ℃, water-cooled)	??≥20	??------	??------

Embodiment

The production method of high RUL of the present invention, anti-peeling high aluminium brick, it comprises the steps:

The first step: use alligator, cone crusher with the large granular materials fragmentation, with ball mill with after the powder processing, take by weighing 3 parts of the bauxitic clay particulate material of granularity 5-3mm by weight, 3 parts of the bauxitic clay particulate material of 0.075mm＜granularity＜3mm, 2.5 parts of the bauxitic clay powders of granularity≤0.075mm; 1 part of granularity≤0.12mm zircon sand powder, 0.5 part of the clay powder of granularity≤0.075mm;

Second step: above-mentioned mixing of materials is even, and the lignin liquor that adds material gross weight 4-5% is mixing more than 15 minutes in edge runner-wet mill, sends into pressing machine, under the condition of forming pressure greater than 400KN, extrusion forming, the pressurization number of times must not obtain work in-process less than 1kg/ time;

Used bauxitic clay is Al ₂O ₃〉=80%, Fe ₂O ₃＜1.5%, CaO≤0.4%; Used zircon sand is Fe ₂O ₃＜0.30%, Zr ₂O ₃〉=65%; Used clay powder is Al ₂O ₃〉=42-50%, Fe ₂O ₃≤ 2%.

Claims

1. the production method of a high RUL, anti-peeling high aluminium brick, it is characterized in that: it comprises the steps:

2. the production method of high RUL according to claim 1, anti-peeling high aluminium brick is characterized in that: the standard of described bauxitic clay is Al ₂O ₃〉=80%, Fe ₂O ₃＜1.5%, CaO≤0.4%.

3. the production method of high RUL according to claim 1, anti-peeling high aluminium brick is characterized in that: the standard of described zircon sand is Fe ₂O ₃＜0.30%, Zr ₂O ₃〉=65%.

4. the production method of high RUL according to claim 1, anti-peeling high aluminium brick is characterized in that: the standard of described clay powder is Al ₂O ₃〉=42-50%, Fe ₂O ₃≤ 2%.