High-strength wear-resistant anti-corrosion brick and manufacturing method thereof

A high-strength, kaolin technology, applied in the field of refractory materials, can solve the problems of unusable, service life of only one to two months, and service life of only 80 days, etc., to achieve moderate cost, good performance and low wear.

Active Publication Date: 2014-03-12

JIANGSU JIANGNENG NEW MATERIAL TECH

3 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Magnesia-chrome bricks and magnesium-chrome-zirconium bricks in the existing market cannot meet such requirements, and the service life is only one to two months

A customer uses silicon-molybdenum bricks, which are used in the high-temperatur...

Abstract

The invention discloses a high-strength wear-resistant anti-corrosion brick and a manufacturing method thereof, and belongs to the field of refractory materials. The high-strength wear-resistant anti-corrosion brick comprises the following raw materials in parts by weight: 50-100 parts of bauxite, 5-20 parts of chromium concentrate, 1-10 parts of metallic silicon submicron powder and 1-10 parts of kaolin. The high-strength wear-resistant anti-corrosion brick is prepared by successively performing burdening, mulling, molding, drying and sintering. The high-strength wear-resistant anti-corrosion brick provided by the invention not only is simple in production technology and moderate in cost, but also is good in usage performances, and the service life of the high-strength wear-resistant anti-corrosion brick in a high-temperature segment of a laterite-nickel ore rotary kiln employing a direct reduction technology is up to one year or more, so that the production cost of a nickel iron enterprise is substantially reduced, the comprehensive energy consumption is reduced, the user requirements are completely exceeded, and impressive economic benefit is obtained.

Technology Topic

AluminiumRotary kiln +13

Image

Examples

Experimental program(5)

Example Embodiment

[0028] Example 1:

[0029] A high-strength wear-resistant and anti-intrusion brick includes the following raw materials in parts by weight: 60 parts by weight of bauxite, 20 parts of chromium concentrate, 1 part of metallic silicon powder, and 10 parts of kaolin.

[0030] The bauxite contains Al 2 O 3 ≥80%, Fe 2 O 3 ≤1.2%, volume density 2.6~2.8g/cm 3 , Particle size 0~5mm; the chromium concentrate contains Cr 2 O 3 ≥47%, particle size of 0~0.05mm; said metallic silicon powder contains metallic silicon content ≥96, particle size of 0~1μm; said kaolin SiO 2 ≥62%, Al 2 O 3 ≥35%, Fe 2 O 3 ≤1.5%, particle size 0~0.05mm.

[0031] A method for preparing high-strength wear-resistant and anti-intrusion bricks sequentially includes the following steps:

[0032] 1) Ingredients: According to the formula, mix the proportion of bauxite, chromium concentrate, metallic silicon powder, and kaolin, plus 65% phosphoric acid, which accounts for 2% of the total weight of the above components, and send them into the mixer for 3 minutes and take it out. The material is trapped for 12 hours to obtain the base material;

[0033] 2) Mixing: add 0.5% of the base weight of the yellow dextrin to premix for 2 minutes, then add 3% of the weight of the base material to mix for 5 minutes to obtain a mud;

[0034] 3) Forming: The above-mentioned mud is pressed and formed by a 630-ton friction brick press to obtain a wet body;

[0035] 4) Drying: The above-mentioned wet billet is sent to the tunnel drying kiln and dried at 20°C~110°C for 24 hours to obtain a dry billet;

[0036] 5). Firing: The above-mentioned dry billet is sent into a tunnel high-temperature kiln for firing. The firing temperature and time are as follows: 50℃~800℃ isocratic heating for 24 hours, 800℃~900℃ isogradient heating for 10 hours, 900℃ ~1480℃ isocratic heating for 14 hours, 1480℃ keeping for 10 hours, 1480℃~1200℃ isogradient cooling for 14 hours, 1200℃~800℃ isogradient cooling for 8 hours, and natural cooling to normal temperature after 800℃ to obtain the finished product.

[0037] The physical and chemical indexes of the high-strength wear-resistant and anti-intrusion brick prepared in Example 1 are:

[0038]

Example Embodiment

[0039] Example 2:

[0040] A high-strength wear-resistant and anti-intrusion brick includes the following raw materials in parts by weight: 80 parts by weight of bauxite, 7 parts of chromium concentrate, 10 parts of metallic silicon powder, and 8 parts of kaolin.

[0041] The bauxite contains Al 2 O 3 ≥85%, Fe 2 O 3 ≤1.2%, volume density 2.6~2.8g/cm 3 , Particle size 0~5mm; the chromium concentrate contains Cr 2 O 3 ≥47%, particle size 0~0.05mm; said metal silicon powder contains metallic silicon content ≥96%, particle size 0~1μm; said kaolin SiO 2 ≥62%, Al 2 O 3 ≥35%, Fe 2 O 3 ≤1.5%, particle size 0~0.05mm.

[0042] A method for preparing high-strength wear-resistant and anti-intrusion bricks sequentially includes the following steps:

[0043] 1) Ingredients: According to the formula, mix the proportions of bauxite, chromium concentrate, metallic silicon powder, and kaolin, plus 30% phosphoric acid, which accounts for 7% of the total weight of the above components, and send them into the mixer for 5 minutes and take them out. Stuck the material for 10 hours to obtain the base material;

[0044] 2) Mixing: add 0.5% of the weight of the above-mentioned base material and premix for 5 minutes, and then add 3% of the weight of the above-mentioned base material and mix for 3 minutes to obtain a mud;

[0045] 3) Forming: The above-mentioned mud is pressed and formed under a 400-ton friction brick press to obtain a wet body;

[0046] 4) Drying: The above-mentioned wet billet is sent to a tunnel drying kiln and dried at 20°C to 110°C for 18 hours to obtain a dry billet;

[0047] 5). Firing: The above-mentioned dry billet is sent into a tunnel high-temperature kiln for firing. The firing temperature and time are as follows: 50℃~800℃ isocratic heating for 24 hours, 800℃~900℃ isogradient heating for 8 hours, 900℃ ~1480℃ isocratic heating for 12 hours, 1480℃ keeping for 8 hours, 1480℃~1200℃ isogradient cooling for 12 hours, 1200℃~800℃ isogradient cooling for 6 hours, and natural cooling to normal temperature after 800℃ to obtain the finished product.

[0048] The physical and chemical indexes of the high-strength wear-resistant and anti-intrusion brick prepared in Example 2 are:

[0049]

Example Embodiment

[0050] Example 3:

[0051] A high-strength wear-resistant and anti-intrusion brick includes the following raw materials in parts by weight: 75 parts by weight of bauxite, 8 parts of chromium concentrate, 5 parts of metallic silicon powder, and 1 part of kaolin.

[0052] The bauxite contains Al 2 O 3 ≥85%, Fe 2 O 3 ≤1.2%, volume density 2.6~2.8g/cm 3 , Particle size 0~5mm; the chromium concentrate contains Cr 2 O 3 ≥47%, particle size 0~0.05mm; said metal silicon powder contains metallic silicon content ≥96%, particle size 0~1μm; said kaolin SiO 2 ≥62%, Al 2 O 3 ≥35%, Fe 2 O 3 ≤1.5%, particle size 0~0.05mm.

[0053] A method for preparing high-strength wear-resistant and anti-intrusion bricks sequentially includes the following steps:

[0054] 1) Ingredients: According to the formula, mix the proportions of bauxite, chromium concentrate, metallic silicon powder, and kaolin, plus 40% phosphoric acid, which accounts for 5% of the total weight of the above components, and send them to the mixer for 15 minutes and take them out. The material is trapped for 12 hours to obtain the base material;

[0055] 2) Mixing: add 0.5% yellow dextrin by weight of the above-mentioned base material for pre-mixing for 4 minutes, and then add water accounting for 3% by weight of the above-mentioned base material and knead for 4 minutes to obtain a mud;

[0056] 3) Forming: The above-mentioned mud is pressed and formed by a 630-ton friction brick press to obtain a wet body;

[0057] 4) Drying: The above-mentioned wet billet is sent to a tunnel drying kiln and dried at 20°C to 110°C for 20 hours to obtain a dry billet;

[0058] 5). Firing: The above-mentioned dry billet is sent into a tunnel high-temperature kiln for firing. The firing temperature and time are as follows: 50℃~800℃ isocratic heating for 24 hours, 800℃~900℃ isogradient heating for 8 hours, 900℃ ~1480℃ isocratic heating for 12 hours, 1480℃ keeping for 8 hours, 1480℃~1200℃ isogradient cooling for 12 hours, 1200℃~800℃ isogradient cooling for 6 hours, and natural cooling to normal temperature after 800℃ to obtain the finished product.

[0059] The physical and chemical indexes of the high-strength wear-resistant and anti-intrusion brick prepared in Example 3 are:

[0060]

PUM

Property	Measurement	Unit
Bulk density	2.6 ~ 2.8	g/cm³
Granularity	0.0 ~ 5.0	mm
Particle size	0.0 ~ 0.05	mm

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Classification and recommendation of technical efficacy words

Simple production process
moderate cost

High-strength wear-resistant anti-corrosion brick and manufacturing method thereof

A high-strength, kaolin technology, applied in the field of refractory materials, can solve the problems of unusable, service life of only one to two months, and service life of only 80 days, etc., to achieve moderate cost, good performance and low wear.

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

Similar technology patents

Drag reducer and preparation method thereof

Method of recovering manganese sulfate from low-grade manganese carbonate and manganese oxide

Packaging method of LED (light-emitting diode) flexible lamp strip

Biaxially oriented nylon film (BOPA) matt film and manufacturing method thereof

Micro USB (universal serial bus) receptacle

Classification and recommendation of technical efficacy words

Waste rubber powder/styrene-butadiene-styrene (SBS) composite modified asphalt and production process thereof

Preparation method of NdFeB magnet with high coercivity

Method for synthesizing modified sodium alginate flocculating agent and application of flocculating agent

Production method of composite bimetal pipe

Method for producing outer bag paper of apple fruit growing bag by coating method

Method for processing double face fabric with single-side moisture transferring and cooling functions

Online credit investment-financing method and system

Multifunctional environment-friendly waterproof paint and preparation method thereof

Intelligent lifter for integrated cooker

Head removable camera