CN103319133A - Desulfurized-ash plastered dry powder by semidry process and preparation method thereof - Google Patents
Desulfurized-ash plastered dry powder by semidry process and preparation method thereof Download PDFInfo
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- CN103319133A CN103319133A CN2013102698795A CN201310269879A CN103319133A CN 103319133 A CN103319133 A CN 103319133A CN 2013102698795 A CN2013102698795 A CN 2013102698795A CN 201310269879 A CN201310269879 A CN 201310269879A CN 103319133 A CN103319133 A CN 103319133A
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Abstract
The invention discloses desulfurized-ash plastered dry powder by a semidry process and a preparation method thereof so as to solve the problems of low utilization rate, long production period and high treatment cost of steel slags and desulfurized fly ash in the existing iron and steel enterprises. The desulfurized-ash plastered dry powder comprises the following components in percentage by weight: 25-30% of desulfurized fly ash, 40-50% of hot-braised steel slag, 20-30% of mineral slag micropowder, 0-10% of bentonite and 0-1% of additive, and the total weight is 100%. The desulfurized-ash plastered dry powder is prepared by treatment of the steps of simply drying and/or grinding materials respectively and then uniform mixing. The process is simple, the production cost is low, two types of waste slags such as the desulfurized fly ash and the hot-braised steel slag are adopted as one of production materials, the problems of land occupation and secondary pollution caused by great stacking of the steel slags in the iron and steel enterprises are solved, simultaneously the problem of bad stability when the steel slags are used as an admixture of building materials can be solved and the desulfurized-ash plastered dry powder is friendly to the environment.
Description
Technical field
The present invention relates to a kind of metallurgical environmental protection technical field, specifically wipe one's face dry powder and manufacture method thereof of a kind of semidrying sintering desulfuration ash.
Background technology
Desulfurization flying ash is that the steel enterprise sintering environment friendly system produces a kind of desulfurization refuse, year generation of Wuhan Iron and Steel Plant is with regard to about 30,000 tons, desulphurize fly ash can not be used for building materials production without ageing, stabilization treatment all the time, and ageing and stabilization treatment can increase production cost and process cycle, and this is that the technician wishes the technical problem that solves always; A kind of industrial residue that produces when slag is steel-making on the other hand, its quantity is generally 10～20% of crude steel output, and generation is huge.The generation of national slag in 2006 is about 0.7 hundred million tons, and the Multipurpose Utilization of Steel Slag rate has only 20% according to incompletely statistics.Shortcomings such as traditional process for treating steel slag ubiquity floor space is big, processing environment is seriously polluted, devices consume is big; Simultaneously general modified method owing to active oxidation calcium contents height, instability in the slag, can't be promoted the use of usually normally.Storing up in a large number of slag brought a large amount of dust pollutions for the on-site environment of iron and steel enterprise, also taken valuable land resources, " the dual waste " of this resource of being known as in environmentalism simultaneously in a large number.
Summary of the invention
The objective of the invention is in order to solve the problems of the technologies described above, provide that a kind of technology is simple, production cost is low, with desulfurization flying ash and the stewing two kinds of waste residues of slag of heat as one of raw materials for production, solve that iron and steel enterprise's invar slag is stored up occupation of land and the secondary pollution problem brought in a large number, bad problem, the environment amenable semidrying sintering desulfuration ash of the stability dry powder of wiping one's face in the time of can solving slag simultaneously and make the building materials adulterant.
The manufacture method that the present invention also provides a kind of above-mentioned semidrying sintering desulfuration ash to wipe one's face dry powder, the desulfurization flying ash that uses in the raw material can be without ageings, stabilization treatment and are directly used in building materials production.
The semidrying sintering desulfuration ash of the present invention dry powder of wiping one's face consists of the stewing slags 40～50% of desulfurization flying ash 25～30% heat by weight percentage, slag micropowder 20～30%, and wilkinite 0～10%, admixture 0～1%, adding up to weight is 100%.
The particle diameter of described flying dust and slag is not more than 2mm, moisture dose rate＜1%.
The wipe one's face manufacture method of dry powder of dry sintering desulphurize fly ash of the present invention comprises the steps:
1) desulfurization flying ash oven dry back is standby;
2) it is standby to make slag micropowder after slag drying is levigate:
3) with the stewing slag crushing of heat, screening back dry for standby;
4) desulfurization flying ash 25～30% heat are boiled in a covered pot over a slow fire slag 40～50% by weight percentage, slag micropowder 20～30%, and wilkinite 0～10%, admixture 0～1%, adding up to weight is 100%, drops into the interior mix of stirrer simultaneously evenly namely.
Described step 1) and step 2) in bake out temperature be that 85 ± 1 ℃, drying time are 2 hours, described step 2) the thin back of chats sizing (being slag micropowder) specific surface area is not less than 450m
2/ kg.
Crushing granularity requirement is not more than 2mm in the described step 3), and drying requirement is moisture dose rate＜1%.
The described mixing machine of described step 4) is centrifugal three stirrers.
Described wilkinite and admixture can be selected to add as required, and bentonitic adding can promote quality product by improving sample workability and the liquidity scale, and described admixture is selected from naphthalene system, at least a in poly carboxylic acid or the aliphatic high-efficiency water reducing agent.
Among the present invention except having mixed hot stewing slag and slag micropowder, also mixed desulfurization flying ash, corrode and equate action principle with synthesised polycrystalline by adsorption bridging, bonding parcel, non-interface, make and to admix in the dry powder without ageing and stabilization treatment desulfurization flying ash, the bad problem of stability when simultaneously also having solved slag and making the building materials adulterant.
The present invention takes full advantage of iron and steel enterprise's waste steel slag, and slag and desulfurization flying ash are turned waste into wealth, and do not add lime, carbide slag, binding agent, hardening accelerator, materials such as cement do not need to arrange curing room, save energy, the waste residue incorporation is big, the stewing slag of heat and slag micropowder are used and can 100% substitute river sand and the cement bond material uses, and reduce the natural resources exploitation, simultaneously effective a large amount of wastes of processing; The stewing slag of the compound heat of desulfurization flying ash and slag micropowder are used, and need not add cement or other agglutination materials; The desulfurization flying ash volume surpasses more than 25%, and the 7 days ultimate compression strength of dry powder glue sand of wiping one's face can reach more than the 5Mpa, and ultimate compression strength can reach more than the 20Mpa in 28 days, the dry powder intensity of wiping one's face of producing is higher, production cost is low, good product quality, and its every technical indicator has also reached country's dry powder standard of wiping one's face.
Embodiment
Table 1 embodiment proportioning raw materials table
Processing method embodiment:
1. material preprocessing: desulfurization flying ash is standby after 2 hours with desulfurization flying ash 84-86 ℃ of oven dry; With 85 ± 1 ℃ in slag oven dry 2 hours, levigately be not less than 450m to specific surface area
2It is standby to make slag micropowder behind the/kg: with the stewing slag crushing of heat after be not more than the 2mm screening, dry for standby; The wilkinite of market acquisition finished product (receiving wilkinite) is standby.Described raw material all should be controlled moisture dose rate＜1% before mixing and mixing.
2. respectively the desulfurization flying ash of weight described in the embodiment 1-5 in the table 1, the stewing slag of heat, slag micropowder, wilkinite and admixture are dropped into to mix in centrifugal three stirrers simultaneously and stirred 5 minutes, make the semidrying sintering desulfuration ash dry powder 1-5 that wipes one's face after mixing respectively.
The semidrying sintering desulfuration ash dry powder 1-5 that wipes one's face detects according to the detection method of National Standard Method GB1344-1999 " Portland blast, Portland pozzolana cement, Portland fly ash cement ", and every performance sees Table 2.
| The sample title | 7 days intensity Mpa | 28 days intensity Mpa |
| Embodiment 1 | 5.9 | 27.8 |
| Embodiment 2 | 7.1 | 25.0 |
| Embodiment 3 | 6.7 | 29.0 |
| Embodiment 4 | 11.3 | 26.1 |
| Embodiment 5 | 9.0 | 25.9 |
Claims (6)
1. semidrying sintering desulfuration ash dry powder of wiping one's face is characterized in that, consists of the stewing slags 40～50% of desulfurization flying ash 25～30% heat by weight percentage, slag micropowder 20～30%, and wilkinite 0～10%, admixture 0～1%, adding up to weight is 100%.
2. the semidrying sintering desulfuration ash as claimed in claim 1 dry powder of wiping one's face is characterized in that the particle diameter of described flying dust and slag is not more than 2mm, moisture dose rate＜1%.
3. a claim 1 or the 2 described semidrying sintering desulfuration ashes manufacture method of dry powder of wiping one's face is characterized in that, comprises the steps:
1) desulfurization flying ash oven dry back is standby;
2) it is standby to make slag micropowder after slag drying is levigate:
3) with the stewing slag crushing of heat, screening back dry for standby;
4) stewing slags 40～50% of desulfurization flying ash 25～30% heat by weight percentage, slag micropowder 20～30%, wilkinite 0～10%, admixture 0～1%, adding up to weight is 100% to drop in the stirrer mix simultaneously evenly namely.
4. the semidrying sintering desulfuration ash as claimed in claim 3 manufacture method of dry powder of wiping one's face, it is characterized in that, described step 1) and step 2) in bake out temperature be that 85 ± 1 ℃, drying time are 2 hours, step 2) the thin back of chats sizing specific surface area is not less than 450m
2/ kg.
5. the semidrying sintering desulfuration ash as claimed in claim 3 manufacture method of dry powder of wiping one's face is characterized in that crushing granularity requirement is not more than 2mm in the described step 3), and drying requirement is moisture dose rate＜1%.
6. the semidrying sintering desulfuration ash as claimed in claim 3 manufacture method of dry powder of wiping one's face is characterized in that mixing machine described in the described step 4) is centrifugal three stirrers.
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|---|---|---|---|
| CN2013102698795A CN103319133A (en) | 2013-06-28 | 2013-06-28 | Desulfurized-ash plastered dry powder by semidry process and preparation method thereof |
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| CN2013102698795A CN103319133A (en) | 2013-06-28 | 2013-06-28 | Desulfurized-ash plastered dry powder by semidry process and preparation method thereof |
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| CN103319133A true CN103319133A (en) | 2013-09-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553466A (en) * | 2013-10-29 | 2014-02-05 | 武汉钢铁(集团)公司 | FGD (flue gas desulfurization) desulfurized fly ash solidifying agent and preparation method thereof |
| CN104072016A (en) * | 2014-07-10 | 2014-10-01 | 武汉钢铁(集团)公司 | Semidry-process desulfurization ash putty for interior wall |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674799A (en) * | 2012-05-18 | 2012-09-19 | 武汉钢铁(集团)公司 | Semidry-process sintering desulphurization slag autoclaved building block and production method thereof |
| CN102674780A (en) * | 2012-05-18 | 2012-09-19 | 武汉钢铁(集团)公司 | Heat-stewed steel slag building plastering dry powder and preparation method thereof |
-
2013
- 2013-06-28 CN CN2013102698795A patent/CN103319133A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674799A (en) * | 2012-05-18 | 2012-09-19 | 武汉钢铁(集团)公司 | Semidry-process sintering desulphurization slag autoclaved building block and production method thereof |
| CN102674780A (en) * | 2012-05-18 | 2012-09-19 | 武汉钢铁(集团)公司 | Heat-stewed steel slag building plastering dry powder and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553466A (en) * | 2013-10-29 | 2014-02-05 | 武汉钢铁(集团)公司 | FGD (flue gas desulfurization) desulfurized fly ash solidifying agent and preparation method thereof |
| CN103553466B (en) * | 2013-10-29 | 2015-11-11 | 武汉钢铁(集团)公司 | FGD desulphurize fly ash solidifying agent and preparation method thereof |
| CN104072016A (en) * | 2014-07-10 | 2014-10-01 | 武汉钢铁(集团)公司 | Semidry-process desulfurization ash putty for interior wall |
| CN104072016B (en) * | 2014-07-10 | 2016-04-13 | 武汉钢铁(集团)公司 | A kind of semi-dry desulphurization ash inner wall putty |
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Application publication date: 20130925 |