CN101250050A - Steel slag baking-free brick - Google Patents

Steel slag baking-free brick Download PDF

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Publication number
CN101250050A
CN101250050A CNA2008100140158A CN200810014015A CN101250050A CN 101250050 A CN101250050 A CN 101250050A CN A2008100140158 A CNA2008100140158 A CN A2008100140158A CN 200810014015 A CN200810014015 A CN 200810014015A CN 101250050 A CN101250050 A CN 101250050A
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China
Prior art keywords
brick
slag
steel
ageing
steel scoria
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Granted
Application number
CNA2008100140158A
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Chinese (zh)
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CN101250050B (en
Inventor
罗时政
刘富增
亓立峰
马晓健
郑文军
常均
王玺
胡玉芬
张树阳
陈东玫
庄健
李新国
姜德俊
宋青伟
刘福运
张仁安
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BAODE CHARGING STOCK Co Ltd JINAN
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BAODE CHARGING STOCK Co Ltd JINAN
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Priority to CN2008100140158A priority Critical patent/CN101250050B/en
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Publication of CN101250050B publication Critical patent/CN101250050B/en
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017—Aspects relating to the protection of the environment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention relates to a steel slag free sintering brick, belonging to the recycle technical field of steel slag, wherein the materials of the free sintering brick are steel slag stand, steel slag powder, blast furnace slag and lime, and the production method of the steel slag free sintering brick comprises adding water with weighted materials, mixing, pressing and shaping via a brick press, maintaining and aging to obtain final product of steel slag free sintering brick. The inventionc can shorten production period, eliminate sintering, eliminate heat energy, save time, improve yield, reduce cost and release the environment pollution of steel slag and greenhouse effect of carbon dioxide.

Description

A kind of steel scoria unburned brick
Technical field
The invention belongs to the The Recovery and Utilization of Steel Slay field, be specially a kind of steel scoria unburned brick.
Background technology
Slag is the slag of discharging in the steelmaking process, mainly be the oxidized back of each element generates in the metal charge oxide compound, the impurity brought into of the gainster and fettling material, the metal charge that are etched with for smelting slag making materialses such as Wingdale that different steel grades need specially to add, rhombspar, iron ore, fluorite.Slag accounts for 15～20% of Iron And Steel Industry solid waste, 1 ton of crude steel of every production all can discharge the slag of about 180Kg, it is existing more than 200,000,000 tons that China accumulates slag, take up an area of more than 10,000 mu, a large amount of slags, not only appropriation of land, and slag is easy to be weathered into alkaline dust in stacking process, environment is on every side caused serious pollution.Slag is mainly used to some extent in building material field at present, as produce steel slag cement, making cement admixtion, slag micro powder, foundation material etc., but utilization ratio is lower, only account for about 10%, and annual still increase progressively,, will take increasing soil if it is not handled and fully utilizes with millions of tons bed drain purge, when forming environmental pollution, also cause the waste of a large amount of available stocks, thereby have influence on the Sustainable development of Iron And Steel Industry.
Contain a large amount of unsettled free calcium oxide f-CaO and magnesium oxide MgO in the slag, formation temperature height, advantages of good crystallization.The molecular volume of calcium oxide is 16.9cm 3/ mol, magnesian molecular volume is 10.67cm 3/ mol, the molecular volume of calcium hydroxide is 33.1cm 3/ mol, the molecular volume of magnesium hydroxide is 24.7cm 3/ mol, volume can increase nearly 1 times during the calcium oxide aquation, and volume can increase manyly during the magnesium oxide aquation, causes producing in the use of slag goods expanding, thereby has limited the use of slag in each field.Making the use of slag goods generally is that nature is placed the old slag after 20 years, and new slag can only be spiked into below 30% at most, and will add the part gelling material, could guarantee not occur to expand.At application number is in the patent application of 02114026.X, discloses a kind of making method of steel slag brick, and the defective that this method exists is that the time of maintenance is long, and the maintenance warehouse that needs is big, production cycle is long, the expense height, and investment is big, and need oven dry, expend heat energy, the cost height.
The harm that the slag goods cause engineering in ageing process mainly is to expand and efflorescence, and the requirement that the engineering material is done to slag by China is that slag needs ageing, and Pulverization ratio can not be higher than 5%, and how to address this problem is a problem that difficulty is very big now.
Summary of the invention
The objective of the invention is to exist curing time long at above-mentioned steel slag brick, production cycle is long, need the defective of heat energy oven dry and a kind of steel scoria unburned brick is provided, this method has solved the problem of above-mentioned existence, has reduced the production cycle, do not need sintering, do not need heat energy, save time, improved productivity, reduced cost, the more important thing is and to alleviate the Greenhouse effect that environmental pollution problems that slag causes and emission of carbon-dioxide are brought.
The technical scheme of steel scoria unburned brick of the present invention is, the raw material of steel scoria unburned brick comprises slag sand, steel-making slag powder, blast furnace slag, lime, the method of making described steel scoria unburned brick is, with two kinds in the above-mentioned raw materials or two or more according to certain proportioning, mix after metering, add water and stir,, after maintenance, ageing, make the Finished Steel slag bake-free brick then to brick pressing machine compression moulding.
The raw material of steel scoria unburned brick of the present invention comprises slag sand, steel-making slag powder, blast furnace slag, lime, and the weight proportion relation of described raw material is: slag sand 10-60 part, and steel-making slag powder 5-50 part, blast furnace slag 20-70 part, lime 5-30 part, the amount of the water of adding is 4-15 part.Described ageing is specially: will put into autoclave through the brick of maintenance, and at normal temperatures, feed CO 2Gas, ageing pressure are 0.1-2MPa, and digestion time is 3-48h.
As preferably, in the described aging step, ageing pressure is 0.1-1MPa, and digestion time is 12-36h.
The CO that in aging step, feeds 2The purity of gas is 10-100%, can be to contain CO 2The various waste gas of gas.
The concrete grammar of making steel scoria unburned brick of the present invention is: will send into stirrer according to the load weighted material of proportioning raw materials, add entry 4-15 part, after stirring, material loading to brick pressing machine carries out the moulding compacting, the brick that suppresses is put under field conditions (factors) to warehouse maintenance 2-3 days, then brick is put into autoclave and carry out ageing, ageing finishes to obtain the Finished Steel slag bake-free brick.
The present invention's making method and step more specifically is as follows:
1. the processing of material: slag sand is to get the screen underflow of the new slag that produces of STEELMAKING PRODUCTION after overheated stewing, magnetic separation, below the particle diameter 8mm;
Steel-making slag powder be the new slag that produces of STEELMAKING PRODUCTION through magnetic separation iron after iron level less than 2%, the following fine powder of particle diameter 1mm that grinding becomes;
Blast furnace slag is the granulation slag through shrend that produces during ironmaking is produced, and crosses 5mm square hole sieve screen underflow;
Lime is through grinding;
2. moulding
Concern the weighing material according to each proportioning raw materials of steel scoria unburned brick, slag sand 10-60 part, steel-making slag powder 5-50 part, blast furnace slag 20-70 part, lime 5-30 part adds entry 4-15 part, stirs with mixer, and material loading is used brick pressing machine compression moulding to brick compacting mold;
3. maintenance
The brick that suppresses is put under field conditions (factors) to warehouse maintenance 2-3 days;
4. ageing process
Brick after the blanks and moulding and conserving is put into high pressure vessel, at normal temperatures, feed CO 2Gas carries out ageing.
Beneficial effect of the present invention can lead to above-mentioned description is drawn, the technology of this steel scoria unburned brick is to utilize the new slag of current output fully, reduce the accumulation of slag, alleviated the environmental pollution that brings in the slag put procedure, need not to add gelling material in the moulding process, need not to use cement, promptly reduced cost, easy and simple to handle again, under performances such as intensity, stability prerequisite up to standard, solve the bad problem of stability in the new slag application process, in ageing process, fed CO 2Gas does not need to consume heat energy, and promptly save energy has been utilized greenhouse gases CO again 2, positive effect has been played in the improvement of environment, simultaneously applied CO 2Also can be the waste gas of output in the production process, calculate, can consume surplus the slag 70 ten thousand tons, utilize CO by producing 400,000,000 steel scoria unburned bricks 2Reaching ten thousand tons of 7-10, is to slag and CO 2Carry out a breakthrough of minimizing, comprehensive utilization of resources, the slag ageing is made non-burning brick technology the utilization ratio of slag is brought up to more than 60%, and active response the call of national energy-saving and emission-reduction policy, the new way of having opened up steel slag utilization is the high-tech new technology project of the treatment of wastes with processes of wastes against one another.
The ultimate compression strength of the steel scoria unburned brick finished product that obtains is the highest can to reach 30MPa, and wherein, the intensity of 80% product can reach 15MPa, and through boiling 3h, pressure is checked after steaming 3h, and stability is all qualified.Steel scoria unburned brick is carried out the requirement that Performance Detection such as freeze-thaw-, scum, water-intake rate all can reach the common brick premium grads.The square as follows form of the concrete data of various performances.
Table 1 steel scoria unburned brick performance data
Project Standard-required Actual numerical value
Size deviation (mm) Length The sample mean deviation ±2.5 0.9
Sample is differential ≤7 3
Width The sample mean deviation ±2.0 0.8
Sample is differential ≤6 3.1
Thickness The sample mean deviation ±1.6 0.5
Sample is differential ≤5 1.8
Visual appearance (mm) Article two, face difference of altitude ≤3 0.5
Three of the truncation arrisdefect are destroyed size Minimum value≤20 1.2
Crack length ≤30 0
Complete, must not be less than , a face and an end face Five faces are all complete
Strength grade (MPa) Ultimate compression strength mean value ≥15.0 17.2
The variation coefficient≤0.21 o'clock, strength standard value ≥10.0 (14.9 the variation coefficient=0.07)
Frost resistance Freeze back ultimate compression strength mean value (MPa) ≥12.0 15.8
The dry mass loss % of monolithic brick ≤2.0 Monolithic maximum value 1.7
Water-intake rate (being used for weight bearing area) ≤8.0 4.9
Radioactive material Specific radioactivity C Ra / 107.3
C Th / 47.1
C K / 145.7
Construction main body material I Rd ≤1.0 0.5
I Y ≤1.0 0.5
Saturation factor / 0.9
Lime blowing / There is not any explosion zone
Scum / No scum
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment 1
Get 10 parts in slag sand, 40 parts of steel-making slag powder, 50 parts of blast furnace slags, 5 parts in lime, add 10 parts of entry, stir with mixer, material loading is used brick pressing machine compression moulding to brick compacting mold, the brick that suppresses is put under field conditions (factors) to warehouse maintenance 3 days, brick after the blanks and moulding and conserving is put into high pressure vessel, at normal temperatures, feed CO 2Gas (purity is 20%), ageing pressure is 0.1MPa, and digestion time is 36h, and the mean compressive strength of the steel scoria unburned brick that obtains is: 15MPa, wherein the intensity of 80% product can reach 18MPa, and through boiling 3h, pressure is checked after steaming 3h, and stability is all qualified.The square as follows form of various performance datas.
Project Standard-required Actual numerical value
Size deviation (mm) Length The sample mean deviation ±2.5 0.9
Sample is differential ≤7 3
Width The sample mean deviation ±2.0 0.8
Sample is differential ≤6 3.1
Thickness The sample mean deviation ±1.6 0.5
Sample is differential ≤5 1.8
Visual appearance (mm) Article two, face difference of altitude ≤3 0.5
Three of the truncation arrisdefect are destroyed size Minimum value≤20 1.2
Crack length ≤30 0
Complete, must not be less than , a face and an end face Five faces are complete
Strength grade (MPa) Ultimate compression strength mean value ≥15.0 15
The variation coefficient≤0.21 o'clock, strength standard value ≥10.0 (14.9 the variation coefficient=0.07)
Frost resistance Freeze back ultimate compression strength mean value (MPa) ≥12.0 15.8
The dry mass loss % of monolithic brick ≤2.0 Monolithic maximum value 1.7
Water-intake rate (being used for weight bearing area) ≤8.0 4.9
Radioactive material Specific radioactivity C Rd / 107.3
C Th / 47.1
C K / 145.7
Construction main body material I Rd ≤1.0 0.5
I Y ≤1.0 0.5
Saturation factor / 0.9
Lime blowing / There is not any explosion zone
Scum / No scum
Embodiment 2
Get 10 parts in slag sand, 40 parts of steel-making slag powder, 50 parts of blast furnace slags, 5 parts in lime, add 10 parts of entry, stir with mixer, material loading is used brick pressing machine compression moulding to brick compacting mold, the brick that suppresses is put under field conditions (factors) to warehouse maintenance 3 days, brick after the blanks and moulding and conserving is put into high pressure vessel, at normal temperatures, feed CO 2Gas (purity is 90%), ageing pressure is 0.1MPa, and digestion time is 3h, and the mean compressive strength of the steel scoria unburned brick that obtains is: 20MPa, wherein the intensity of 50% product can reach 25MPa, and through boiling 3h, pressure is checked after steaming 3h, and stability is all qualified.The square as follows form of various performance datas.
Project Standard-required Actual numerical value
Size deviation (mm) Length The sample mean deviation ±2.5 0.8
Sample is differential ≤7 3.1
Width The sample mean deviation ±2.0 0.6
Sample is differential ≤6 3.0
Thickness The sample mean deviation ±1.6 0.5
Sample is differential ≤5 1.8
Visual appearance (mm) Article two, face difference of altitude ≤3 0.5
Three of the truncation arrisdefect are destroyed size Minimum value≤20 1.8
Crack length ≤30 0
Complete, must not be less than , a face and an end face Five faces are complete
Strength grade (MPa) Ultimate compression strength mean value ≥15.0 20
The variation coefficient≤0.21 o'clock, strength standard value ≥10.0 (14.9 the variation coefficient=0.07)
Frost resistance Freeze back ultimate compression strength mean value (MPa) ≥12.0 18.8
The dry mass loss % of monolithic brick ≤2.0 Monolithic maximum value 1.7
Water-intake rate (being used for weight bearing area) ≤8.0 4.9
Radioactive material Specific radioactivity C Ra / 105.3
C Th / 44.3
C K / 140.7
Construction main body material I Ra ≤1.0 0.5
I Y ≤1.0 0.5
Saturation factor / 0.9
Lime blowing / There is not any explosion zone
Scum / No scum
Embodiment 3
Get 10 parts in slag sand, 40 parts of steel-making slag powder, 60 parts of blast furnace slags, 5 parts in lime, add 10 parts of entry, stir with mixer, material loading is used brick pressing machine compression moulding to brick compacting mold, the brick that suppresses is put under field conditions (factors) to warehouse maintenance 3 days, brick after the blanks and moulding and conserving is put into high pressure vessel, at normal temperatures, feed CO 2Gas (purity is 20%), ageing pressure is 0.5MPa, and digestion time is 20h, and the mean compressive strength of the steel scoria unburned brick that obtains is: 15MPa, wherein the intensity of 80% product can reach 18MPa, and through boiling 3h, pressure is checked after steaming 3h, and stability is all qualified.The square as follows form of various performance datas.
Project Standard-required Actual numerical value
Size deviation (mm) Length The sample mean deviation ±2.5 0.8
Sample is differential ≤7 3
Width The sample mean deviation ±2.0 0.9
Sample is differential ≤6 3.2
Thickness The sample mean deviation ±1.6 0.5
Sample is differential ≤5 1.2
Visual appearance (mm) Article two, face difference of altitude ≤3 0.5
Three of the truncation arrisdefect are destroyed size Minimum value≤20 1.1
Crack length ≤30 0
Complete, must not be less than , a face and an end face Five faces are all complete
Strength grade (MPa) Ultimate compression strength mean value ≥15.0 15
The variation coefficient≤0.21 o'clock, strength standard value ≥10.0 (14.2 the variation coefficient=0.07)
Frost resistance Freeze back ultimate compression strength mean value (MPa) ≥12.0 15.2
The dry mass loss % of monolithic brick ≤2.0 Monolithic maximum value 1.7
Water-intake rate (being used for weight bearing area) ≤8.0 4.9
Radioactive material Specific radioactivity C Rd / 107.3
C Th / 47.1
C K l 145.7
Construction main body material I Ra ≤1.0 0.5
I Y ≤1.0 0.5
Saturation factor / 0.7
Lime blowing / There is not any explosion zone
Scum / No scum
Embodiment 4
Get 10 parts in slag sand, 40 parts of steel-making slag powder, 50 parts of blast furnace slags, 5 parts in lime, add 10 parts of entry, stir with mixer, material loading is used brick pressing machine compression moulding to brick compacting mold, the brick that suppresses is put under field conditions (factors) to warehouse maintenance 2 days, brick after the blanks and moulding and conserving is put into high pressure vessel, at normal temperatures, feed CO 2Gas (purity is 10%), ageing pressure is 1MPa, and digestion time is 48h, and the mean compressive strength of the steel scoria unburned brick that obtains is: 18MPa, wherein the intensity of 80% product can reach 20MPa, and through boiling 3h, pressure is checked after steaming 3h, and stability is all qualified.The square as follows form of various performance datas.
Project Standard-required Actual numerical value
Size deviation (mm) Length The sample mean deviation ±2.5 0.6
Sample is differential ≤7 2.8
Width The sample mean deviation ±2.0 0.5
Sample is differential ≤6 3.1
Thickness The sample mean deviation ±1.6 0.3
Sample is differential ≤5 1.8
Visual appearance (mm) Article two, face difference of altitude ≤3 0.2
Three of the truncation arrisdefect are destroyed size Minimum value≤20 1.5
Crack length ≤30 0
Complete, must not be less than , a face and an end face Five faces are all complete
Strength grade (MPa) Ultimate compression strength mean value ≥15.0 18
The variation coefficient≤0.21 o'clock, strength standard value ≥10.0 (16.9 the variation coefficient=0.07)
Frost resistance Freeze back ultimate compression strength mean value (MPa) ≥12.0 17.8
The dry mass loss % of monolithic brick ≤2.0 Monolithic maximum value 1.7
Water-intake rate (being used for weight bearing area) ≤8.0 4.9
Radioactive material Specific radioactivity C Ra / 107.3
C Th / 47.1
C K / 145.7
Construction main body material I Rd ≤1.0 0.5
I Y ≤1.0 0.5
Saturation factor / 0.9
Lime blowing / There is not any explosion zone
Scum / No scum
Embodiment 5
Get 10 parts in slag sand, 40 parts of steel-making slag powder, 50 parts of blast furnace slags, 5 parts in lime, add 10 parts of entry, stir with mixer, material loading is used brick pressing machine compression moulding to brick compacting mold, the brick that suppresses is put under field conditions (factors) to warehouse maintenance 2 days, brick after the blanks and moulding and conserving is put into high pressure vessel, at normal temperatures, feed CO 2Gas (purity is 10%), ageing pressure is 2MPa, and digestion time is 20h, and the mean compressive strength of the steel scoria unburned brick that obtains is: 18MPa, wherein the intensity of 80% product can reach 20MPa, and through boiling 3h, pressure is checked after steaming 3h, and stability is all qualified.The square as follows form of various performance datas.
Project Standard-required Actual numerical value
Size deviation (mm) Length The sample mean deviation ±2.5 0.6
Sample is differential ≤7 3.1
Width The sample mean deviation ±2.0 0.6
Sample is differential ≤6 2.0
Thickness The sample mean deviation ±1.6 0.3
Sample is differential ≤5 1.2
Visual appearance (mm) Article two, face difference of altitude ≤3 0.4
Three of the truncation arrisdefect are destroyed size Minimum value≤20 1.3
Crack length ≤30 0
Complete, must not be less than , a face and an end face Five faces are complete
Strength grade (MPa) Ultimate compression strength mean value ≥15.0 18
The variation coefficient≤0.21 o'clock, strength standard value ≥10.0 (15.9 the variation coefficient=0.07)
Frost resistance Freeze back ultimate compression strength mean value (MPa) ≥12.0 16.8
The dry mass loss % of monolithic brick ≤2.0 Monolithic maximum value 1.7
Water-intake rate (being used for weight bearing area) ≤8.0 4.9
Radioactive material Specific radioactivity C Rd / 107.3
C Th / 47.1
C K / 145.7
Construction main body material I Rd ≤1.0 0.5
I Y ≤1.0 0.5
Saturation factor / 0.9
Lime blowing / There is not any explosion zone
Scum / No scum
Embodiment 6
Get 10 parts in slag sand, 40 parts of steel-making slag powder, 60 parts of blast furnace slags add 10 parts of entry, stir with mixer, material loading is used brick pressing machine compression moulding to brick compacting mold, and the brick that suppresses is put under field conditions (factors) to warehouse maintenance 3 days, brick after the blanks and moulding and conserving is put into high pressure vessel, at normal temperatures, feed CO 2Gas (purity is 20%), ageing pressure is 0.5MPa, and digestion time is 20h, and the mean compressive strength of the steel scoria unburned brick that obtains is: 15MPa, wherein the intensity of 80% product can reach 18MPa, and through boiling 3h, pressure is checked after steaming 3h, and stability is all qualified.The square as follows form of various performance datas.
Project Standard-required Actual numerical value
Size deviation (mm) Length The sample mean deviation ±2.5 0.6
Sample is differential ≤7 3.0
Width The sample mean deviation ±2.0 0.6
Sample is differential ≤6 2.0
Thickness The sample mean deviation ±1.6 0.3
Sample is differential ≤5 1.2
Visual appearance (mm) Article two, face difference of altitude ≤3 0.4
Three of the truncation arrisdefect are destroyed size Minimum value≤20 1.1
Crack length ≤30 0
Complete, must not be less than , a face and an end face Five faces are complete
Strength grade (MPa) Ultimate compression strength mean value ≥15.0 15
The variation coefficient≤0.21 o'clock, strength standard value ≥10.0 (15.9 the variation coefficient=0.07)
Frost resistance Freeze back ultimate compression strength mean value (MPa) ≥12.0 14.8
The dry mass loss % of monolithic brick ≤2.0 Monolithic maximum value 1.7
Water-intake rate (being used for weight bearing area) ≤8.0 4.9
Radioactive material Specific radioactivity C Ra / 107.3
C Th / 47.1
C K / 145.7
Construction main body material I Ra ≤1.0 0.5
I Y ≤1.0 0.5
Saturation factor / 0.9
Lime blowing / There is not any explosion zone
Scum / No scum
Embodiment 7
Get 60 parts of steel-making slag powder, 60 parts of blast furnace slags add 10 parts of entry, stir with mixer, material loading is used brick pressing machine compression moulding to brick compacting mold, and the brick that suppresses is put under field conditions (factors) to warehouse maintenance 3 days, brick after the blanks and moulding and conserving is put into high pressure vessel, at normal temperatures, feed CO 2Gas (purity is 20%), ageing pressure is 0.5MPa, and digestion time is 20h, and the mean compressive strength of the steel scoria unburned brick that obtains is: 15MPa, wherein the intensity of 80% product can reach 18MPa, and through boiling 3h, pressure is checked after steaming 3h, and stability is all qualified.The square as follows form of various performance datas.
Project Standard-required Actual numerical value
Size deviation (mm) Length The sample mean deviation ±2.5 0.7
Sample is differential ≤7 2.1
Width The sample mean deviation ±2.0 0.6
Sample is differential ≤6 2.0
Thickness The sample mean deviation ±1.6 0.4
Sample is differential ≤5 1.2
Visual appearance (mm) Article two, face difference of altitude ≤3 0.2
Three of the truncation arrisdefect are destroyed size Minimum value≤20 1.3
Crack length ≤30 0
Complete, must not be less than , a face and an end face Five faces are complete
Strength grade (MPa) Ultimate compression strength mean value ≥15.0 15
The variation coefficient≤0.21 o'clock, strength standard value ≥10.0 (15.9 the variation coefficient=0.07)
Frost resistance Freeze back ultimate compression strength mean value (MPa) ≥12.0 14.8
The dry mass loss % of monolithic brick ≤2.0 Monolithic maximum value 1.7
Water-intake rate (being used for weight bearing area) ≤8.0 4.9
Radioactive material Specific radioactivity C Ra / 107.3
C Th / 47.1
C K / 145.7
Construction main body material I Ra ≤1.0 0.5
I Y ≤1.0 0.5
Saturation factor / 0.9
Lime blowing / There is not any explosion zone
Scum / No scum

Claims (7)

1. steel scoria unburned brick, it is characterized in that, the raw material of described steel scoria unburned brick comprises slag sand, steel-making slag powder, blast furnace slag, lime, the method of making described steel scoria unburned brick is, with two kinds in the above-mentioned raw materials or two or more according to certain proportioning, mix after metering, add water and stir, to brick pressing machine compression moulding, after maintenance, ageing, make the Finished Steel slag bake-free brick then.
2. steel scoria unburned brick according to claim 1 is characterized in that, the weight proportion relation of described raw material is: slag sand 10-60 part, and steel-making slag powder 5-50 part, blast furnace slag 20-70 part, lime 5-30 part, the amount of the water of adding is 4-15 part.
3. steel scoria unburned brick according to claim 1 is characterized in that, described ageing is specially: will put into autoclave through the brick of maintenance, and at normal temperatures, feed CO 2Gas, ageing pressure are 0.1-2MPa, and digestion time is 3-48h.
4. steel scoria unburned brick according to claim 3 is characterized in that, described ageing is specially: will put into autoclave through the brick of maintenance, and at normal temperatures, feed CO 2Gas, ageing pressure are 0.1-1MPa, and digestion time is 12-36h.
5. according to claim 3 or 4 described steel scoria unburned bricks, it is characterized in that the CO that feeds in the described ageing 2The purity of gas is 10-100%.
6. steel scoria unburned brick according to claim 1, it is characterized in that, the making method of described steel scoria unburned brick is: will send into stirrer according to the load weighted material of proportioning raw materials, add entry 4-15 part, after stirring, material loading to brick pressing machine carries out the moulding compacting, and the brick that suppresses is put under field conditions (factors) to warehouse maintenance 2-3 days, then brick is put into the autoclave ageing, ageing finishes to obtain the Finished Steel slag bake-free brick.
7. steel scoria unburned brick according to claim 6 is characterized in that, the system of described steel scoria unburned brick
Make method and step is:
1. the processing of material: slag sand is to get the screen underflow of the new slag that produces of STEELMAKING PRODUCTION after overheated stewing, magnetic separation, below the particle diameter 8mm;
Steel-making slag powder be the new slag that produces of STEELMAKING PRODUCTION through magnetic separation iron after iron level less than 2%, the following fine powder of particle diameter 1mm that grinding becomes;
Blast furnace slag is the granulation slag through shrend that produces during ironmaking is produced, and crosses 5mm square hole sieve screen underflow;
Lime is through grinding;
2. moulding
Concern the weighing material according to each proportioning raw materials of steel scoria unburned brick, slag sand 10-60 part, steel-making slag powder 5-50 part, blast furnace slag 20-70 part, lime 5-30 part adds entry 4-15 part, stirs with mixer, and material loading is used brick pressing machine compression moulding to brick compacting mold;
3. maintenance
The brick that suppresses is put under field conditions (factors) to warehouse maintenance 2-3 days;
4. ageing process
Brick after the blanks and moulding and conserving is put into high pressure vessel, at normal temperatures, feed CO 2Gas carries out ageing.
CN2008100140158A 2008-01-21 2008-01-21 Steel slag baking-free brick Expired - Fee Related CN101250050B (en)

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