CN105130386A - Red mud sintering brick having good thermal insulation effect - Google Patents

Abstract

The present invention discloses a red mud sintering brick having a good thermal insulation effect, wherein the red mud sintering brick is prepared from the following raw materials by weight: 40-50 parts of shale powder, 10-20 parts of red mud, 2-5 parts of carbon nano-tubes, 3-5 parts of barite sand, 1-3 parts of a melamine water reducer, 0.5-1.5 parts of slag, 1-2 parts of sodium alginate, 0.2-0.4 part of octyldodecyl glucoside, 4-6 parts of mica powder, 1-3 parts of carbon powder, 1-3 parts of mirabilite, 10-20 parts of fly ash, 1-3 parts of volcaniclastic rock, 10-20 parts of expanded perlite, 1-2 parts of a compounded coagulating agent, and a proper amount of water. According to the present invention, the porosity of the red mud sintering brick can be increased through the red mud and the expanded perlite, the red mud can be re-utilized; during the sintering process, the partial coagulating agent component is fired out and the pore is left, such that the harmful substances can be absorbed; and the bulk density can be reduced, and the thermal insulation property can be improved.

Description

A kind of red mud baked brick of high insulating effect

Technical field

The present invention relates to vitrified brick technical field, particularly relate to a kind of red mud baked brick of high insulating effect.

Background technology

Pearlstone be perlite ore through preheating, a kind of inside of making after TRANSIENT HIGH TEMPERATURE calcining expansion is the material of the white granular of polynuclear plane.Its principle is: perlite ore forms the ore in sand form of certain particle size through fragmentation, through preheating and baking, instant heating (more than 1000 DEG C), moisture vaporization in ore in sand form, vitreous ore in sand form internal expansion is contained softening, form vesicular structure, volumetric expansion 10-30 non-metallic mineral products doubly. perlite is divided into three kinds of forms according to its expansion process technology and purposes difference: open bore (opencell), closed pore (closedcell), hollow hole (balloon).

Red mud is the waste produced in aluminum oxide production process, often produce 1 ton of aluminum oxide and about produce red mud more than 1.5 tons, because China and outside China there is no effective industrialized treatment method before this, even if in the past developed country is also is mostly enter marine, become worldwide the difficult problem of environmental protection together.China's relevant industries generally can only be stored up in the past, have both occupied a large amount of soil, have polluted again to soil, water source, air etc.

All with clay, shale, coal gangue or flyash for raw material, obtainedly through shaping and high-temperature roasting be referred to as vitrified brick for the brick of building load-bearing and non-bearing wall body by laying bricks or stones.

The production of common brick and use, in existing more than the 3000 year history of China.Now, in the materials for wall used in construction project, common brick is still occupied an leading position.Although there is many deficiencies in common brick, but due to cheap, technique is simple, design and construction technique is ripe and the reason such as the use inertia of people, common brick, within considerable time from now on, particularly in rural area, remains one of main materials for wall.

In construction industry, materials for wall is the important composition part of construction industry, and the consumption of materials for wall in building materials is maximum.In recent years, along with the propelled at high velocity of urban construction, the every Year's consumption of China's wall body brick, more than 6,000 hundred million pieces, consumes about 660,000 mu, soil, consumes mark 9,000 ten thousand tons, coal.Under the dual function of environmental requirement and Policy Conditions, solid flyash brick is withdrawn from the market just gradually, promotes novel wall material, reduces and stores up occupation of land, superseded clay brick production capacity, Economization on land is the trend of the times of environmental requirement, and the environmental protection innovation of materials for wall industry is imperative.

The heat-insulating property of ordinary fired brick is poor, as Self-thermal-insulation System, can not meet energy-saving design in construction requirement, must add heat insulating material for external, smear thermal insulation layer because needs add, and construction is inconvenient and cost is higher, the duration is longer.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of red mud baked brick of high insulating effect.

The present invention is achieved by the following technical solutions:

A red mud baked brick for high insulating effect, is characterized in that, it is obtained by the raw material of following weight parts:

Shale powder 40-50, red mud 10-20, carbon nanotube 2-5, heavy crystal sand 3-5, melamine based water reducer 1-3, slag 0.5-1.5, sodium alginate 1-2, octyldodecyl glucoside 0.2-0.4, mica powder 4-6, carbon dust 1-3, saltcake 1-3, flyash 10-20, volcanoclastic rock 1-3, pearlstone 10-20, composite flocculation agent 1-2, suitable quantity of water;

Composite flocculation agent is obtained by the raw material of following weight parts:

Wallantoin 1-2, SBS1-2, gum arabic 0.3-0.4, xylogen 2-4, carboxymethyl hydroxyethyl cellulose 1-2, alkylphenol polyoxyethylene 1-2, silicon sol 5-8, calcium propionate 0.2-0.4, redispersible latex powder 1-2;

The preparation method of described composite flocculation agent is:

Silicon sol and appropriate amount of deionized water, 10-15min is stirred under 60-80 rev/min, add xylogen, carboxymethyl hydroxyethyl cellulose, alkylphenol polyoxyethylene again, 20-40 rev/min is continued to stir 10-15min, be warming up to 35-40 DEG C again to start to add all the other raw materials, after 40-50 rev/min of stirring 5-8min, be cooled to 25-30 DEG C of discharging, obtain product.

The red mud baked brick of described a kind of high insulating effect, it is characterized in that, preparation method comprises the following steps:

(1) by volcanoclastic rock, pearlstone fragmentation, add suitable quantity of water, the mixing of octyldodecyl glucoside again, stir 10-15min under the stirring velocity of 100-200r/min, leave standstill after 2-4 hour, adjust ph is 8-9, add sodium alginate again, after stirring, after ball milling 1-2h, vacuum filtration, after washing, dry 4-6h at 60-80 DEG C, obtains modification Rock Powder for subsequent use;

(2) by flyash, suitable quantity of water mixing, under the stirring velocity of 100-200r/min, 10-15min is stirred, then add modification Rock Powder and all the other raw materials, mix under normal temperature, obtain composite material for subsequent use;

(3) by composite material coldmoulding, fragment of brick embryo is obtained;

(4) fragment of brick embryo is placed in sintering oven, 700-800 DEG C is warming up to 5-10 DEG C/min speed under air atmosphere, be incubated 20-40min again, 900-1000 DEG C is warming up to again with 5-10 DEG C/min speed, insulation 70-80min, finally cool to 600-650 DEG C, insulation 20-30min, then cooling down obtains product.

Described silicon sol is silicon-dioxide quality mark is the silicon sol of 30-60%

Advantage of the present invention is:

(1) red mud and pearlstone can increase porosity of the present invention, recycle red mud, in sintering process, after partial agglomeration agent composition burning-off, leave hole, can adsorb harmful components, reduce unit weight simultaneously, improve heat retaining property.

(2) flocculation agent can increase plasticity-and the intensity of blank of the present invention;

(3) the mineral powder modification such as pearlstone of the present invention, make its can better and flyash composite, obtained aerated bricks, improves mineral powder viscosity inadequate, needs the shortcoming strengthening flyash and consumption of binder; After mineral powder first regulates PH, carry out modification again, make a large amount of positively charged ions wherein better replace by positively charged ion, increase consistency, divide breaking up more even, improve and add the shortcoming that mineral powder can affect strength of sintered brick, thus by adding more mineral powder, flyash consumption can be reduced with this;

(4) in raw-material preparation process, lowered the temperature again by secondary temperature elevation, make each raw material compatible more abundant, flocculation agent infiltration evenly, obtained strength of sintered brick is higher.

Embodiment

A red mud baked brick for high insulating effect, it is obtained by the raw material of following weight (kg):

Shale powder 50, red mud 20, carbon nanotube 2, heavy crystal sand 5, melamine based water reducer 1,1.5, sodium alginate 1, octyldodecyl glucoside 0.4, mica powder 6, carbon dust 3, saltcake 1, flyash 20, volcanoclastic rock 3, pearlstone 10, composite flocculation agent 2, suitable quantity of water;

Composite flocculation agent is obtained by the raw material of following weight (kg):

Wallantoin 1, SBS1, gum arabic 0.3, xylogen 2, carboxymethyl hydroxyethyl cellulose 1, alkylphenol polyoxyethylene 1, silicon sol 5, calcium propionate 0.4, redispersible latex powder 2;

The preparation method of described composite flocculation agent is:

Silicon sol and appropriate amount of deionized water, 15min is stirred under 80 revs/min, add xylogen, carboxymethyl hydroxyethyl cellulose, alkylphenol polyoxyethylene again, 40 revs/min are continued to stir 15min, be warming up to 40 DEG C again to start to add all the other raw materials, after 50 revs/min of stirring 8min, be cooled to 30 DEG C of dischargings, obtain product.

The red mud baked brick of described a kind of high insulating effect, preparation method comprises the following steps:

(1) by volcanoclastic rock, pearlstone fragmentation, add suitable quantity of water, the mixing of octyldodecyl glucoside again, stir 15min under the stirring velocity of 100r/min, leave standstill after 2 hours, adjust ph is 8, add sodium alginate again, after stirring, after ball milling 1h, vacuum filtration, after washing, dry 6h at 80 DEG C, obtains modification Rock Powder for subsequent use;

(2) by flyash, suitable quantity of water mixing, under the stirring velocity of 200r/min, 15min is stirred, then add modification Rock Powder and all the other raw materials, mix under normal temperature, obtain composite material for subsequent use;

(3) by composite material coldmoulding, fragment of brick embryo is obtained;

(4) fragment of brick embryo is placed in sintering oven, is warming up to 800 DEG C, then is incubated 40min under air atmosphere with 10 DEG C/min speed, then is warming up to 1000 DEG C with 5 DEG C/min speed, and insulation 80min, finally cools to 600 DEG C, insulation 30min, then cooling down obtains product.

Described silicon sol is silicon-dioxide quality mark is the silicon sol of 30-60%

The ultimate compression strength of the present embodiment is 16.3MPa; Water-intake rate is 7-9%; Thermal conductivity is 0.38w/mk.

Claims (2)

1. a red mud baked brick for high insulating effect, is characterized in that, it is obtained by the raw material of following weight parts:

Shale powder 40-50, red mud 10-20, carbon nanotube 2-5, heavy crystal sand 3-5, melamine based water reducer 1-3, slag 0.5-1.5, sodium alginate 1-2, octyldodecyl glucoside 0.2-0.4, mica powder 4-6, carbon dust 1-3, saltcake 1-3, flyash 10-20, volcanoclastic rock 1-3, pearlstone 10-20, composite flocculation agent 1-2, suitable quantity of water;

Composite flocculation agent is obtained by the raw material of following weight parts:

Wallantoin 1-2, SBS1-2, gum arabic 0.3-0.4, xylogen 2-4, carboxymethyl hydroxyethyl cellulose 1-2, alkylphenol polyoxyethylene 1-2, silicon sol 5-8, calcium propionate 0.2-0.4, redispersible latex powder 1-2;

The preparation method of described composite flocculation agent is:

Silicon sol and appropriate amount of deionized water, 10-15min is stirred under 60-80 rev/min, add xylogen, carboxymethyl hydroxyethyl cellulose, alkylphenol polyoxyethylene again, 20-40 rev/min is continued to stir 10-15min, be warming up to 35-40 DEG C again to start to add all the other raw materials, after 40-50 rev/min of stirring 5-8min, be cooled to 25-30 DEG C of discharging, obtain product.

2. the red mud baked brick of a kind of high insulating effect according to claim 1, it is characterized in that, preparation method comprises the following steps:

(1) by volcanoclastic rock, pearlstone fragmentation, add suitable quantity of water, the mixing of octyldodecyl glucoside again, stir 10-15min under the stirring velocity of 100-200r/min, leave standstill after 2-4 hour, adjust ph is 8-9, add sodium alginate again, after stirring, after ball milling 1-2h, vacuum filtration, after washing, dry 4-6h at 60-80 DEG C, obtains modification Rock Powder for subsequent use;

(2) by flyash, suitable quantity of water mixing, under the stirring velocity of 100-200r/min, 10-15min is stirred, then add modification Rock Powder and all the other raw materials, mix under normal temperature, obtain composite material for subsequent use;

(3) by composite material coldmoulding, fragment of brick embryo is obtained;

(4) fragment of brick embryo is placed in sintering oven, 700-800 DEG C is warming up to 5-10 DEG C/min speed under air atmosphere, be incubated 20-40min again, 900-1000 DEG C is warming up to again with 5-10 DEG C/min speed, insulation 70-80min, finally cool to 600-650 DEG C, insulation 20-30min, then cooling down obtains product.