CN102320761B - Method for preparing cement active mixed material and concrete active admixture - Google Patents
Method for preparing cement active mixed material and concrete active admixture Download PDFInfo
- Publication number
- CN102320761B CN102320761B CN 201110148564 CN201110148564A CN102320761B CN 102320761 B CN102320761 B CN 102320761B CN 201110148564 CN201110148564 CN 201110148564 CN 201110148564 A CN201110148564 A CN 201110148564A CN 102320761 B CN102320761 B CN 102320761B
- Authority
- CN
- China
- Prior art keywords
- slag
- cement
- iron
- active
- calcined slag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention relates to a method for preparing a cement active mixed material and concrete active admixture. The method comprises the following steps of: after crushing kaolinite pyrite raw ores containing 15-24 percent of sulphur, carrying out magnetized boiling calcination or conventional calcination, wherein the boiling calcinations time is controlled at the furnace temperature of 700-950 DEG C so as to ensure that the sulphur content of calcined slag is below 1.5 percent, and in the conventional calcination, 0.3-19 percent by weight of coal powder containing 60-80 percent of carbon in terms of the weight of the calcined slag is directly added into the calcined slag so as to ensure that iron trioxide in the calcined slag is reduced into ferroferric oxide or iron; then charging the calcined slag subjected to the magnetized boiling calcination or conventional calcination into a sealed cooler for cooling to normal temperature at the temperature reducing speed of 50-150 DEG C per hour; carrying out secondary crushing on the cooled calcined slag to reach the embedded granularity of magnetite and kaolinite; and finally, separating out a high-iron-content calcined slag part by carrying out magnetic separation on the dissociated calcined slag, wherein the residual calcined slag parts are the cement active mixed material and concrete active admixture. The method provided by the invention has the obvious advantages of low production cost, simple process, strong operability and environment friendliness.
Description
Technical field
The invention belongs to the preparation method of material of construction, especially preparing method's technical field of cement mixture and concrete active mineral admixture.
Background technology
The kind of cement active mixed material: mainly contain granulated blast-furnace slag, pozzolana mixed material (comprising the active metakaolinite of kaolin calcined product----), flyash etc.The admixture mixing material can be regulated cement mark and kind in cement; Increase cement output; Reduce production costs, improve some performance of cement to a certain extent, satisfy in the construction work special technical requirement cement; Cement active mixed material can fully utilize a large amount of industrial residues, has environmental protection and energy-conservation significance.China's national standards, "Universal Portland Cement" (GB? 175-2007) provides a common portland cement by mixing a variety of materials and ash into Portland cement, ordinary portland cement, portland slag cement, pozzolana Portland cement, fly ash cement and composite portland cement.Ordinary Portland cement is by Portland clinker admixture mixed with little amount material and proper amount of gypsum is levigate forms.Portland blast is by Portland clinker and granulated blast-furnace slag, adds that proper amount of gypsum is levigate to form.Portland pozzolana cement adds proper amount of gypsum, levigate forming by Portland clinker and pozzolana mixed material.Portland fly is added by Portland clinker and flyash that proper amount of gypsum is levigate to form.Composite Portland cement is by levigate the processing of mixing material, proper amount of gypsum of Portland clinker, two or more regulation.Data show, press in the Portland pozzolana cement that the pozzolana mixed material combined amount is 20～40%, only at home, needed calcareous addition of volcano at least 2.5～500,000,000 ton in 1 year altogether.
Concrete active admixture is the vitreous state mineral of quicklime, aluminum oxide and the silicon oxide etc. that contain some amount, the Ca (OH) that separates out when these mineral can be with slaked lime or hydrated cementitious under the aqueous condition of normal temperature
2Or CaSO
4Effect generates the stable compound with gelating property, can improve concrete performance, practices thrift cement and regulate strength grade of concrete.In the ready-mixed concrete process, mix concrete active admixture, its volume is generally greater than 5% of cement weight, and the concrete active admixture materials used also is flyash, granulated blast-furnace slag, pozzolanic materials.Therefore, cement and concrete industry are very big to the calcareous addition of volcano demand.
Metakaolinite is a kind of important high reactivity volcano grey matter cement mixture and concrete active admixture, and it can quicken the aquation of cement, increases the gel content of hydrated calcium silicate, obviously improves the ultimate compression strength of cement mortar.The metakaolinite production of prior art is to form through the insulation certain hour with kaolin high temperature (650-800 ℃) calcining; This production technology calcining and insulation need to consume a large amount of coals; And will consume the abundant kaolin of resource, so develop a kind of novel metakaolinite volcano grey matter cement mixture and concrete active admixture seems to have important social and economic implications.
China's ferro-sulphur ore is abundant, but sulfurous iron ore many with in low-grade be main, average geologic grade 17.68%, its gangue mineral is exactly the kaolinite clay mineral of high titanium, iron.At present in the kaolinite type in the tailings of low grade pyrite ore dressing kaolinite content closely reach 90%; But because of it contains the sulphur about 7%; So can not directly utilize, can not after calcining, make cement mixture and concrete active admixture use, this has not only wasted the resource of a large amount of preciousnesses; And ecotope, industrial and agricultural production, the people's health of storing up the locality of a large amount of mine tailings caused serious harm, and environment such as waters are on every side caused serious pollution.If can such be contained a large amount of kaolinic middle low grade pyrite comprehensive high-efficiency utilizations directly calcines; Burn so and promptly contain a large amount of metakaolinites in the slag; Again iron is wherein removed; This part metakaolinite in theory just can the substituted for silicon ash, flyash etc. is as novel metakaolinite volcano grey matter cement mixture and concrete admixture; Both can solve mine tailings and stack the environmental pollution that brings, and can make resource obtain reasonable use again, for trouble and worry is removed in the middle low grade pyrite development and use of the type; Also can solve routine techniques and produce the resource restriction and the high energy consumption problem of metakaolinite volcano grey matter cement mixture and concrete active blending material, have important social, economy and environmental benefit.
Summary of the invention
Metakaolinite production is to form through the insulation certain hour with the kaolin high-temperature calcination to the object of the invention in the above-mentioned prior art in order to overcome just; And need consume a large amount of coals; And to consume the not abundant kaolinic deficiency of resource; And in the kaolinite type in the tailings of low grade pyrite ore dressing because of its sulphur that contains; Can not directly utilize; The defective that the mine tailings that formation is stored up in a large number work the mischief to local ecotope; And provide a kind of with low grade pyrite in the extremely abundant unmanageable kaolinite type of resource, and produce the preparation method of metakaolinite type high reactivity volcano grey matter cement mixture and concrete active admixture, solve low grade pyrite problem of complex utilization in resource restriction and the high energy consumption and the kaolinite type of conventional metakaolinite type high reactivity volcano grey matter cement mixture and concrete active admixture production.
The objective of the invention is to realize like this:
The preparation method of a kind of active addition of cement and concrete active admixture is characterized in that, step is: with the kaolinite sulfurous iron ore raw ore of sulfur-bearing 15%～24%; Directly be crushed to the granularity that is consistent with the fluidizing furnace parameter without washing; Join fluidizing furnace then and magnetize fluidized calcination or conventional calcining, burn the slag sulphur content through sampling Detection and control the fluidized calcination time, make and burn the slag sulfur-bearing below 1.5% at 700～950 ℃; Routine is calcined; In burning slag, directly add by burning 0.3%～19% of slag weight, carbon containing is 60～80% coal dust, makes the red oxide of iron that burns in the slag be reduced into Z 250 or iron; To burn slag then and put into the cooling of airtight water cooler and reduce to normal temperature, its cooling rate is 50～150 ℃/hour; Again refrigerative is burnt the slag secondary breaking and reach magnetite and kaolinic disseminated grain size; Magnetite and metakaolinite are dissociated; At last dissociated burning slag is burnt slag through magnetic separation with high iron content and partly select, remaining burning slag partly is active addition of cement and concrete active admixture.
Active addition of cement that obtains and concrete active admixture staple are active SiO
2And Al
2O
3, iron-holder is less than 15%, is novel metakaolinite type high reactivity volcano grey matter cement mixture and concrete active admixture.
The gas that contains sulfurous gas that calcining produces is used to produce sulfuric acid or produces sulphur; The high iron content that magnetic separation obtains is burnt slag and can be used as the powdered iron ore sale.
The invention has the beneficial effects as follows that low grade pyrite is a raw material in the employing kaolinite type, utilizes FeS wherein
2Oxidation reaction heat is sintered into metakaolinite with kaolinite, does not need to consume external energy again, and ability byproduct iron breeze and sulfuric acid or sulphur, and production cost is low, and technology is simple, and is workable.The present invention had both realized the resources circulation comprehensive utilization; Protected environment again, comprehensive benefit is higher, and cost advantage is obvious; The industry direction that meets national energy-saving and emission-reduction, recycle; Be resources conservation and recycling economy innovative technology, the produce market market capacity is big, has great society, economy and environmental benefit.
Description of drawings
Fig. 1 magnetizes the calcination process synoptic diagram for the present invention;
Fig. 2 is the conventional calcining of the present invention coal reducing process schematic flow sheet.
Specific embodiment
Embodiment 1:
Like Fig. 1; With low grade pyrite raw ore in the kaolinite type of high fields, Weixin County, Yunnan sulfur-bearing 16%, directly be crushed to below the 2.5mm, add fluidizing furnace and magnetize fluidized calcination at 800 ℃; Burn the slag sulphur content through sampling Detection and control the fluidized calcination time, make and burn the slag sulfur-bearing below 1.5%; The gas that contains sulfurous gas that calcining produces is used to produce sulfuric acid or produces sulphur.800 ℃ of temperature, sulfur-bearing are put into airtight water cooler cooling at the slag of burning below 1.5% reduce to normal temperature, 80 ℃/hour of control cooling rates.To cool off the secondary breaking of burning slag again to fineness does
0.5-1mm,Magnetite and metakaolinite are dissociated, and are that to obtain staple through magnetic separation under the 0.6T condition be active SiO in magneticstrength at last
2And Al
2O
3, the novel metakaolinite type high reactivity volcano grey matter active addition of cement of iron-holder below 8%, the high iron content that magnetic separation obtains is burnt slag and is sold as powdered iron ore.Replace 12% cement production cement paste to 80 μ m square hole sieve screen over-size 1-3% with this active mixed material is levigate, with reference to GB/T 1346-2001 water requirement for normal consistency of cement paste measuring method testing standard denseness water consumption.40 * 40 * 40mm test specimen of preparation is ± 20 ℃ in temperature, and humidity is maintenance in the maintaining box more than 90%.The experimental result that obtains is following: consumptive use of water normal consistence 38.4mL, 3 days ultimate compression strength 45MPa, 7 days ultimate compression strength 51.3MPa, 28 days ultimate compression strength 80.9MPa, satisfy the active addition of cement quality index.
Embodiment 2:
Like Fig. 2; With low grade pyrite raw ore in the kaolinite type of Da Zhai, Xuyong County, Sichuan sulfur-bearing 21%, directly be crushed to below the 1.5mm, add fluidizing furnace and carry out conventional fluidized calcination at 880 ℃; Burn the slag sulphur content through sampling Detection and control the fluidized calcination time, make and burn the slag sulfur-bearing below 1%; The gas that contains sulfurous gas that calcining produces is used to produce sulfuric acid or produces sulphur.Then 880 ℃ of temperature, sulfur-bearing are sent into reduction furnace at the slag of burning below 1%; Coal dust by burning slag weight 1.5% adding carbon containing 65% makes red oxide of iron wherein be reduced into Z 250; The burning slag that will reduce is again put into airtight water cooler cooling and is reduced to normal temperature, 100 ℃/hour of control cooling rates.To cool off the secondary breaking of burning slag to fineness does
0.5-1mm,Magnetite and metakaolinite are dissociated, at last magneticstrength be under the 0.4T condition magnetic separation to obtain staple be active SiO
2And Al
2O
3, the novel metakaolinite type high reactivity volcano grey matter active addition of cement of iron-holder below 12%, the high iron content that magnetic separation obtains is burnt slag and is sold as powdered iron ore.Replace 6% cement production cement paste to 80 μ m square hole sieve screen over-size 1-3% with this active mixed material is levigate, with reference to GB/T 1346-2001 water requirement for normal consistency of cement paste measuring method testing standard denseness water consumption.40 * 40 * 40mm test specimen of preparation is ± 20 ℃ in temperature, and humidity is maintenance in the maintaining box more than 90%.The experimental result that obtains is following: consumptive use of water normal consistence 36.7mL, 3 days ultimate compression strength 50MPa, 7 days ultimate compression strength 56.8MPa, 28 days ultimate compression strength 82.9MPa, satisfy the active addition of cement quality index.
Embodiment 3:
Like Fig. 1; With low grade pyrite raw ore in the kaolinite type of Hei Shu village, Zhenxiong County, Yunnan sulfur-bearing 16%; Directly be crushed to below 2 mm, add fluidizing furnace and magnetize fluidized calcination, burn the slag sulphur content through sampling Detection and control the fluidized calcination time at 700 ℃; Make and burn the slag sulfur-bearing below 1.2%, the gas that contains sulfurous gas that calcining produces is used to produce sulfuric acid or produces sulphur.700 ℃ of temperature, sulfur-bearing are put into airtight water cooler cooling at the slag of burning below 1.2% reduce to normal temperature, 50 ℃/hour of control cooling rates.To cool off and burn the slag secondary breaking is 0.5-1mm to fineness, and magnetite and metakaolinite are dissociated, at last magneticstrength be under the 0.8T condition magnetic separation to obtain staple be active SiO
2And Al
2O
3, iron-holder 5% novel metakaolinite type high reactivity volcano grey matter concrete active admixture, the high iron content that magnetic separation obtains is burnt slag and is sold as powdered iron ore.This concrete active admixture is levigate to 80 μ m square hole sieve screen over-size 1-3%; Prepare plastic emitting sand test specimen with reference to GB/T12957-2005 " the industrial residue activity test method that is used for cement mixture " and " Test method for strength of hydraulic cement mortar (ISO) method " GB/T17671; Contrast glue sand and the ultimate compression strength of testing glue sand are measured in maintenance 28 days.According to GB/T12957-2005 " the industrial residue activity test method that is used for cement mixture ", activity index is calculated by formula 1:
H 28=（R/R
0）×100…………………………………（1）
In the formula:
H 28-activity index, unit is percentage ratio (%)
R-test glue sand 28d ultimate compression strength, unit is MPa (MPa)
R
0-contrast glue sand 28d ultimate compression strength, unit is MPa (MPa)
According to testing measured glue sand ultimate compression strength, calculate the activity index such as the table 1 of this active addition of cement
Table 1
Strength concrete admixture activity activity index reached a "fly ash cement and concrete," the national standard (GB? / T? 1596-2005) used for mixing the active material with fly ash cement strength technical requirements "Intensity activity index ≥ 70% "requirements.
Embodiment 4:
Like Fig. 2; With low grade pyrite raw ore in the kaolinite type of green pepper garden, Gulin County, Sichuan sulfur-bearing 24%, directly be crushed to below the 1.0mm, add fluidizing furnace and carry out conventional fluidized calcination at 950 ℃; Burn the slag sulphur content through sampling Detection and control the fluidized calcination time, make and burn the slag sulfur-bearing below 1%; The gas that contains sulfurous gas that calcining produces is used to produce sulfuric acid or produces sulphur.Then 950 ℃ of temperature, sulfur-bearing are sent into reduction furnace at the slag of burning below 1%; By burn slag weight 18% to add carbon containing be that 70% coal dust makes red oxide of iron wherein be reduced into iron; The burning slag that will reduce is again put into airtight water cooler cooling and is reduced to normal temperature, 150 ℃/hour of control cooling rates.To cool off the secondary breaking of burning slag to fineness does
0.5-1mmIron and metakaolinite are dissociated, at last magneticstrength be under the 0.4T condition magnetic separation to obtain staple be active SiO
2And Al
2O
3, iron-holder 15% novel metakaolinite type high reactivity volcano grey matter concrete active admixture, the iron that magnetic separation obtains is sold as pig iron powder.This is levigate to 80 μ m square hole sieve screen over-size 1-3% with this concrete active admixture; Prepare plastic emitting sand test specimen with reference to GB/T12957-2005 " the industrial residue activity test method that is used for cement mixture " and " Test method for strength of hydraulic cement mortar (ISO) method " GB/T17671; Contrast glue sand and the ultimate compression strength of testing glue sand are measured in maintenance 28 days.According to GB/T12957-2005 " the industrial residue activity test method that is used for cement mixture ", activity index is calculated by formula 1:
According to testing measured glue sand ultimate compression strength, calculate the activity index such as the table 2 of this concrete active admixture
Table 2
Strength concrete admixture activity activity index reached a "fly ash cement and concrete," the national standard (GB? / T? 1596-2005), the activity of mixed materials for cement fly ash strength technical requirements. " strength activity index ≥ 70% "requirements.
This patent is not limited by the embodiment that lifts.
Claims (1)
1. the preparation method of active addition of cement and concrete active admixture is characterized in that step is: with the kaolinite sulfurous iron ore raw ore of sulfur-bearing 15%～24%; Directly be crushed to the granularity that is consistent with the fluidizing furnace parameter without washing; Join fluidizing furnace then and magnetize fluidized calcination or conventional calcining, burn the slag sulphur content through sampling Detection and control the fluidized calcination time, make and burn the slag sulfur-bearing below 1.5% at 700～950 ℃; Routine is calcined; In burning slag, directly add by burning 0.3%～19% of slag weight, carbon containing is 60～80% coal dust, makes the red oxide of iron that burns in the slag be reduced into Z 250 or iron; To burn slag then and put into the cooling of airtight water cooler and reduce to normal temperature, its cooling rate is 50～150 ℃/hour; Again refrigerative is burnt the slag secondary breaking and reach magnetite and kaolinic disseminated grain size; Magnetite and metakaolinite are dissociated; At last dissociated burning slag is burnt slag through magnetic separation with high iron content and partly select, remaining burning slag partly is active addition of cement and concrete active admixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110148564 CN102320761B (en) | 2011-06-03 | 2011-06-03 | Method for preparing cement active mixed material and concrete active admixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110148564 CN102320761B (en) | 2011-06-03 | 2011-06-03 | Method for preparing cement active mixed material and concrete active admixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102320761A CN102320761A (en) | 2012-01-18 |
| CN102320761B true CN102320761B (en) | 2012-12-19 |
Family
ID=45448635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110148564 Expired - Fee Related CN102320761B (en) | 2011-06-03 | 2011-06-03 | Method for preparing cement active mixed material and concrete active admixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102320761B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830831A (en) * | 2017-01-23 | 2017-06-13 | 重庆工商职业学院 | The Plant Containing Kind of Ecological Soil of warping resistance high |
| JP6992644B2 (en) * | 2018-03-27 | 2022-01-13 | 日本製鉄株式会社 | Method for producing uncalcined agglomerate for blast furnace and method for producing pozzolan-reactive iron-containing raw material |
| CN112174558A (en) * | 2020-10-26 | 2021-01-05 | 湖南工学院 | Method for preparing active mineral admixture by using sand washing mud |
| CN112458276A (en) * | 2020-10-29 | 2021-03-09 | 中南大学 | Method for preparing iron ore concentrate and sulfur by synergistic treatment of iron-containing tailings and pyrite |
| CN114349375B (en) * | 2022-01-26 | 2023-02-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for firing portland cement by roasting magnetite pre-selection waste rock |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935176A (en) * | 2010-07-27 | 2011-01-05 | 西南科技大学 | Method for preparing conductive admixture from pyrite smelting slag |
-
2011
- 2011-06-03 CN CN 201110148564 patent/CN102320761B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935176A (en) * | 2010-07-27 | 2011-01-05 | 西南科技大学 | Method for preparing conductive admixture from pyrite smelting slag |
Non-Patent Citations (2)
| Title |
|---|
| 川南硫铁矿综合利用工艺流程研究;彭凤翔;《四川冶金》;19881231(第3期);第17～21页 * |
| 彭凤翔.川南硫铁矿综合利用工艺流程研究.《四川冶金》.1988,(第3期),第17～21页. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102320761A (en) | 2012-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4700348B2 (en) | Two-component wet cement, method for producing and using the same | |
| CN102515588B (en) | A kind of ecological cementing material | |
| WO2018166220A1 (en) | Method for co-producing sulphoaluminate cement and sulfur by using desulfurized gypsum and aluminum ash | |
| CN102826771B (en) | Coal gangue activator, and novel clinker-free cementing material and preparation method thereof | |
| CN106116189B (en) | A kind of no first-hand datum lithium slag composite gelled material | |
| CN108892401B (en) | Method for calcining belite sulphoaluminate cement clinker by using phosphogypsum and cement clinker | |
| CN103435281A (en) | Cement clinker and preparation process thereof | |
| CN109081615A (en) | A kind of road silicate cement clinker and preparation method thereof based on industrial residue | |
| CN108358478B (en) | Method for preparing cementing material by calcining coal gasification slag step by step | |
| CN113336516A (en) | Cementing material prepared from multi-element solid wastes and cooperative regulation and control method thereof | |
| CN102320761B (en) | Method for preparing cement active mixed material and concrete active admixture | |
| CN107721216B (en) | Process for sintering cement clinker by using blast furnace molten slag liquid phase | |
| CN103159450A (en) | Production method of foamed concrete block manufactured from steel slag | |
| CN106904847B (en) | A method of low fever's complex cement is mutually prepared using discarded concrete Behavior of Hardened Cement Paste | |
| CN112661424B (en) | Environment-friendly cement and preparation method thereof | |
| CN108178536B (en) | Method for preparing low-clinker cement by calcining coal gasification slag step by step | |
| CN103319103A (en) | Regenerative hardened cement mortar gelling material and preparation method thereof | |
| CN105621909B (en) | It is a kind of to mix modified Desulphurization and the cement of rice hull ash again | |
| CN102838299A (en) | Method for producing cement by electrolytic manganese residue and red mud | |
| CN104944813A (en) | Particulate Portland cement clinker and preparation method thereof | |
| CN108275895B (en) | Method for preparing cementing material from suspension roasting coal gasification slag | |
| CN112374781B (en) | Steel slag modifier and preparation method and application thereof | |
| CN112028506B (en) | Method and system for co-production of sulphoaluminate-potassium magnesium phosphate composite gel material and sulphur | |
| CN107382107A (en) | A kind of method for preparing sulphoaluminate cement clinker using magnesium slag, manganese slag | |
| CN113060953A (en) | Preparation method of high-activity new coal gangue material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20160603 |