CN105130384A - Production method of acid-resistant, alkali-resistant and high-temperature-resistant foamed ceramic heat-insulation lining used in chimney - Google Patents

Abstract

The invention discloses a production method of an acid-resistant, alkali-resistant and high-temperature-resistant foamed ceramic heat-insulation lining used in a chimney. The heat-insulation lining is prepared from following raw materials, according to certain weight part ratios, clay, bentonite, calcite, dolomite, sandstone, talcum, silicon carbide and a peptizing agent. The production method includes following steps: 1) crushing the raw materials into granular materials being less than 10 mm; 2) stirring and homogenizing the granular materials in a ball mill and wet-milling the granular materials into slurry material in 250 meshes; 3) feeding the slurry material into a drying column, increasing the temperature to 320 DEG C to dry and pelletize the slurry material to obtain pellets; 4) placing the pellets in a kiln car and sintering the pellets in a tunnel kiln at 1200-1250 DEG C; and 5) decreasing the temperature to normal temperature and moving the sintered product after the pellets remains at the sintering temperature zone for 3-10 h, and cutting the sintered product into building blocks according to requirement. The close-pore ceramic heat-insulation material, which is formed through high-temperature roasting to the raw materials blended according to certain weight part ratios and is high in porosity, has the characters of being fire-proofing and flame-retarding, being less in deformation coefficient, is anti-aging, is stable in performance and is toxic-free and environment-friendly. The material is good in compatibility with a wall base layer and a plaster layer, is good in safety and stability, has the same service life of a building, and provides guarantee to heat insulation and high temperature resistance of various chimney buildings.

Description

The production method that foamed ceramic insulation that chimney acid-fast alkali-proof is high temperature resistant serves as a contrast

Technical field

The present invention relates to inorganic ceramic lagging material, especially relate to the production method of a kind of chimney acid-fast alkali-proof high temperature resistant foamed ceramic insulation lining.

Background technology

Chimney be industrial premises common one building, chimney lining is then whole chimney " Digestive tract ", often need to stand the corrosion such as high temperature, acid, alkali, and need that there is certain heat-insulating property, otherwise lethal challenge will be formed to its outer lining, and significantly reduce its work-ing life, how developing a kind of acid and alkali-resistance, insulating lining high temperature resistant, with low cost, is also a no small difficult problem to resistance to material industry.

Summary of the invention

The object of the present invention is to provide the production method of a kind of chimney acid-fast alkali-proof high temperature resistant foamed ceramic insulation lining, the liner security and stability adopting the method to produce is better, and comprehensive cost is lower.

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

The production method that foamed ceramic insulation that chimney acid-fast alkali-proof of the present invention is high temperature resistant serves as a contrast, it is prepared from according to following weight parts proportioning and method by raw clay, wilkinite, calcite, rhombspar, sandstone, talcum, silicon carbide, dispergator:

Proportioning raw materials:

Clay 15 ~ 30 parts, wilkinite 3 ~ 8 parts, 2 ~ 8 parts, calcite, rhombspar 3 ~ 10 parts, 45 ~ 60 parts, sandstone, 5 ~ 12 parts, talcum, 0.5 ~ 4 part, silicon carbide, dispergator 0.1 ~ 3 part;

Production method:

By above-mentioned raw materials through crusher in crushing to the particulate material being less than 10mm, enter ball mill and stir homogenizing, wet-milling and become 250 order mud; Then enter drying tower, be warming up to 320 DEG C of dryings, granulation, kiln loading vehicle enters tunnel furnace and fires, firing temperature 1200 ~ 1250 DEG C, is down to normal temperature kiln discharge, cuts into building block on request after firing temperature band stops 3 ~ 10 hours.

For ensureing the quality of molded heat insulation lining, the physical and chemical index of raw materials sees the following form:

。

Surplus is free-water and some trace elements.

The main performance index of the finished product foamed ceramic insulation lining that the present invention produces is:

Volume density≤320kg/m ³; Thermal conductivity≤0.07w/m.k; Tensile strength>=0.7MPa, combustionproperty A1 level; Water-intake rate≤7.95V/V; Resistance to impact shock 11J.

The invention has the advantages that the closed pore ceramic thermal insulation material of the high porosity that the raw material of mixture is in proportion formed through 1200 ~ 1250 DEG C of high-temperature roastings, there is fire prevention, fire-retardant, deformation coefficient is little, the characteristic of anti-aging, stable performance, asepsis environment-protecting, with plinth course and float coat consistency good, security and stability is good, can the life-span same with buildings, because the fire resistance of product is fine, overcome organic insulation material and be afraid of naked light, easily aging deadly defect, the insulation of building for all kinds of chimney and high temperature resistantly provide guarantee.

The advantage of the finished product foamed ceramic insulation lining that the present invention fires is embodied in:

1, thermal conductivity is low, and thermal conductivity is less than 0.070w/m.k, and unit weight is at 270-320kg/ m ³ left and right, heat insulation good, the heat-insulating heat-preserving material of chimney heat-insulation system can be served as;

2, the material adopted is inorganic materials, high temperature resistant, does not fire, prevents fires;

3, ageing-resistant, good endurance, in the complete and chimney same life-span, having the unrivaled advantage of conventional organic insulation material, is the ideal material for having fire prevention, insulation requirement chimney;

4, consistency is good, can well bond with sand-cement slurry, concrete etc., and use conventional cement mortar just well can bond, wipe one's face, without the need to adopting polymer bonding, working procedure is few, system cracking resistance, antiseepage;

5, water-intake rate is low, and physique is light, is placed in water and does not sink to the bottom, bond firmly, do not limit by chimney height with sand-cement slurry facing tile;

6, various chimney environment is adapted to, at acid and alkali corrosion, cold and hot drastic change, moist, drying is indeformable, not aging under waiting adverse weather condition, does not ftracture, does not shrink, stable performance;

7, with the chimney same life-span, between the chimney usage period, carry out keeping in repair, transforming without the need to increasing expense again, can

With the expense that economizes on resources to greatest extent, comprehensive cost is low;

8, product specification can be cut flexibly according to chimney lining space requirement, can meet different customer demands.

Embodiment

The production method that foamed ceramic insulation that chimney acid-fast alkali-proof of the present invention is high temperature resistant serves as a contrast, it is prepared from according to following weight parts proportioning and method by raw clay, wilkinite, calcite, rhombspar, sandstone, talcum, silicon carbide, dispergator:

Proportioning raw materials:

Clay 15 ~ 30 parts, wilkinite 3 ~ 8 parts, 2 ~ 8 parts, calcite, rhombspar 3 ~ 10 parts, 45 ~ 60 parts, sandstone, 5 ~ 12 parts, talcum, 0.5 ~ 4 part, silicon carbide, dispergator 0.1 ~ 3 part;

Production method:

By above-mentioned raw materials through crusher in crushing to the particulate material being less than 10mm, enter ball mill and stir homogenizing, wet-milling and become 250 order mud, enter suction pit storage; Then suction drying tower, is warming up to 320 DEG C of dryings, granulation; After naturally cooling, kiln loading vehicle enters tunnel furnace and fires: temperature rises to 500 DEG C from normal temperature, and in kiln, material starts to get rid of free water content and crystal water; After rising to 900 DEG C, material starts to soften, shrink; After rising to 1100 DEG C, material becomes melting behaviors to start foaming; After rising to 1180 DEG C, material starts sizing; When temperature rises to 1200 ~ 1250 DEG C, material progressively burns till, and is down to 35 ~ 40 DEG C of kiln discharges, is cut to sheet material or building block according to customer requirement (interior space dimension of actual chimney) after firing temperature band stops 3 ~ 10 hours.

During actual batching, according to the Working environment of actual chimney, can adjust in raw material range value disclosed by the invention, to obtain more satisfactory insulating lining material.

Claims (1)

1. a production method for chimney acid-fast alkali-proof high temperature resistant foamed ceramic insulation lining, is characterized in that: it is prepared from according to following weight parts proportioning and method by raw clay, wilkinite, calcite, rhombspar, sandstone, talcum, silicon carbide, dispergator:

Proportioning raw materials:

Clay 15 ~ 30 parts, wilkinite 3 ~ 8 parts, 2 ~ 8 parts, calcite, rhombspar 3 ~ 10 parts, 45 ~ 60 parts, sandstone, 5 ~ 12 parts, talcum, 0.5 ~ 4 part, silicon carbide, dispergator 0.1 ~ 3 part;

Production method:

By above-mentioned raw materials through crusher in crushing to the particulate material being less than 10mm, enter ball mill and stir homogenizing, wet-milling and become 250 order mud; Then enter drying tower, be warming up to 320 DEG C of dryings, granulation, kiln loading vehicle enters tunnel furnace and fires, firing temperature 1200 ~ 1250 DEG C, is down to normal temperature kiln discharge, cuts into building block on request after firing temperature band stops 3 ~ 10 hours.