CN1203207A

CN1203207A - High-strength fireproof pour material

Info

Publication number: CN1203207A
Application number: CN 97108607
Authority: CN
Inventors: 冯军
Original assignee: HUAQIN INDUSTRIAL KILN Co XI'AN CITY
Current assignee: HUAQIN INDUSTRIAL KILN Co XI'AN CITY
Priority date: 1997-06-25
Filing date: 1997-06-25
Publication date: 1998-12-30

Abstract

A high-strength pouring refractory is prepared from high-aluminium aggregate, high-aluminium powder,zircon sand, emery, additive and binder through dry mixing, mixing with water, pouring, natural curing, and baking, and features high-temp strength, antislag nature and volume stability. Said refractory is suitable for various industrial furnace and kiln whose working temp. is lower than 1600 deg.C.

Description

A kind of high-strength fireproof pour material

The present invention relates to the unshape refractory technology.

Refractory materials is that refractoriness is not less than 1580 ℃ ceramic, is the structured material that is used to build Thermal Equipments such as kiln.In the application of refractory materials, unshape refractory has advantages such as integral body lining body heat shake good stability, resistance to air loss that less investment, power consumption economize, make are good, energy fettling, so it compares with typing refractory materials such as refractory brick, uses more extensive.The kind of unshape refractory is a lot, and low-cement refractory pouring material is one of them, and the aluminate cement refractory castable that this mould material is more traditional has advantages such as compact high-strength, thixotropy is good, work-ing life is long.The main raw material of low-cement refractory pouring material is made up of bauxites aggregate, high-alumina fly, additive tripoly phosphate sodium STPP and wedding agent silicon powder etc., during use, through dry mixing, water mix, casting, natural curing, baking are just accused and are finished.Though this mould material result of use is better, its hot strength, slag resistance etc. are still unsatisfactory, and Applicable temperature can not bear the mal-condition such as positions such as cement kiln outlet, clinkering zones below 1500 ℃ for a long time.

The objective of the invention is: develop a kind of new refractory casting material formula, have better slag resistance, hot strength etc., longer work-ing life and the Applicable temperature of Geng Gao are arranged.

The present invention is achieved in that

Used raw material except bauxites aggregate, high-alumina fly, SILICA FUME, also has lapis amiridis, zircon sand, with additive pure calcium aluminate cement and tripoly phosphate sodium STPP.The granularity of various raw materials, weight ratio, foreign matter content are as shown in the table:

Raw material	Chemical symbol	Foreign matter content %	Granularity mm and content %
Raw material	Chemical symbol	Foreign matter content %	Granularity mm and content %	Bauxites aggregate	??AI ₂O ₃	??Fe ₂O ₃≤3 ??CaO＜0.8	??5—10???33—35 ??3—5????15—6 ??1—3????6—9 ??≤1?????8—10
High-alumina fly	??AI ₂O ₃	??Fe ₂O ₃≤3 ??CaO≤0.8	??≤0.0888—11	Bauxites aggregate	??AI ₂O ₃	??Fe ₂O ₃≤3 ??CaO＜0.8	??5—10???33—35 ??3—5????15—6 ??1—3????6—9 ??≤1?????8—10
High-alumina fly	??AI ₂O ₃	??Fe ₂O ₃≤3 ??CaO≤0.8	??≤0.0888—11	Silicon powder	??SiO ₂	Other are 2-10 years old	??≤90????4—5
Lapis amiridis			??≤0.088?8—10	Silicon powder	??SiO ₂	Other are 2-10 years old	??≤90????4—5
Lapis amiridis			??≤0.088?8—10	Zircon sand	??ZrO ₂	??TiO ₃≤?1.0 ??P ₂O ₅≤0.30 ??Fe ₂O ₅≤0.3	120 8-10 , 180 orders
Pure calcium aluminate cement	????AI ₂O ₃+CaO		????2—5	Zircon sand	??ZrO ₂	??TiO ₃≤?1.0 ??P ₂O ₅≤0.30 ??Fe ₂O ₅≤0.3	120 8-10 , 180 orders
Pure calcium aluminate cement	????AI ₂O ₃+CaO		????2—5	Tripoly phosphate sodium STPP			????0.17—0.20

During use, add water after the dry mixing and stir, the vibratory compaction cast, after natural curing and baking finish.

The present invention's refractory castable, have characteristics such as hot strength height, slag resistance is good, void content is low, be widely used in various Industrial Stoves, smelting furnace below 1600 ℃ etc., be particularly useful for easily being touched in the High Temperature Furnaces Heating Apparatus by invading, the position of damage by friction, as the kilneye of cement rotary kiln, clinkering zone, electric arc furnace bell etc.

Be one embodiment of the present of invention below:

In August nineteen ninety-five, a rotary kiln clinkering zone scaling loss in cement mill, Shaanxi county is serious, uses mould material fettling of the present invention, its proportioning raw materials such as following table:

With the water of adding 6% after the above-mentioned raw materials dry mixing, stir with forced mixer, vibratory compaction, intact back maintenance 24 hours was toasted 5 days down at 100 ℃-900 ℃ at last.Use is the result prove, the life-span of this rotary kiln clinkering zone uses refractory brick to improve about five times, and low cement deposit material improves about 3 times.The key technical indexes contrast of this mould material and low cement deposit material is as follows:

Claims

1, a kind of high-strength fireproof pour material, major ingredient has bauxites aggregate, high-alumina fly, additive STPP (sodium tripolyphosphate), wedding agent silicon powder etc., it is characterized in that: contain lapis amiridis, zircon sand, also contain pure calcium aluminate cement in the additive, the content of these several compositions in mould material is respectively: lapis amiridis 8-10%, zircon sand 8-10%, tripoly phosphate sodium STPP 0.17-0.20%.

2, according to the said mould material of claim 1, it is characterized in that: the granularity≤0.088mm of lapis amiridis, the granularity of zircon sand is the 120-180 order.