CN103964801A - Method for preparing baking-free brick or building block by aluminum oxide by-product extracted from coal ash - Google Patents
Method for preparing baking-free brick or building block by aluminum oxide by-product extracted from coal ash Download PDFInfo
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- CN103964801A CN103964801A CN201410063604.0A CN201410063604A CN103964801A CN 103964801 A CN103964801 A CN 103964801A CN 201410063604 A CN201410063604 A CN 201410063604A CN 103964801 A CN103964801 A CN 103964801A
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a method for preparing a baking-free brick or building block by an aluminum oxide by-product extracted from coal ash. The method comprises the steps as follows: calcium silicon slag, desulfurization gypsum and quick lime are ground respectively to form powder smaller than or equal to 180 meshes for the standby application; following materials in parts by weight: 35-45 parts of calcium silicon slag, 15-25 parts of coal ash, 3-5 parts of desulfurization gypsum, 8-13 parts of quick lime, 15-30 parts of river sand, 1-5 parts of cement and 20-25 parts of water, are mixed and stirred; the uniformly stirred mixture is transported to a forming machine for compression forming treatment to prepare a raw brick; and the prepared raw brick is maintained. The prepared baking-free brick or building block has a good mechanical property and meets the national standard requirement, further, the utilization rates of industrial wastes such as the calcium silicon slag, the coal ash and the like are increased, and the problems that the current emission load of the industrial wastes is overlarge and the industrial wastes cannot be effectively utilized are solved.
Description
Technical field
The invention belongs to industrial solid castoff recycling field, particularly a kind of flyash that utilizes extracts the method that aluminum oxide by product is prepared non-burning brick or building block.
Background technology
Produce in the process of aluminum oxide in fly ash-lime stone sintering process, flyash and raw meal prepared from lime calcining generate from efflorescence alumina clinker, this grog and solid waste---the calcium silicate slag producing after alkali lye mixing stripping, and its output is larger.Only in burning clinker of cement, apply as raw material at present, there is no application in other side.In recent years, along with country forbids the increasing of the dynamics of solid clay brick use, add domestic residue resource and the heavy demand of construction market, non-burning brick, building block has become one of important novel wall material.Non-burning brick, building block is by appropriate proportioning raw materials, under high-pressure molding effect, storeroom is fully contacted, under suitable curing condition, make full use of the aquation gelling reaction that in raw material, active substance occurs each other, reach at short notice suitable intensity, various aspects of performance can be up to state standards, and has the features such as technical process is simple, energy-conserving and environment-protective.How rationally utilizing flyash to extract the by product calcium silicate slag of aluminum oxide, is to be badly in need of the problem that urgently will solve by utilization of waste as resource.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the invention is to propose a kind of flyash that utilizes and extracted the method that aluminum oxide by product is prepared non-burning brick or building block, prepared non-burning brick or building block has good mechanical property, the requirement that is up to state standards, thus realize the recycling of solid waste.
Technical scheme provided by the invention is:
Utilize flyash to extract the method that aluminum oxide by product is prepared non-burning brick or building block, comprise the following steps:
The pre-treatment of step 1, raw material: respectively calcium silicate slag, desulfurated plaster and unslaked lime are carried out to grinding formation≤180 object powder, with for subsequent use, wherein, calcium silicate slag is the alumina clinker and the solid waste producing after alkali lye mixing stripping that flyash generates with raw meal prepared from lime calcining;
Step 2, by weight first by 35～45 parts of calcium silicate slags, 3～5 parts of 15～25 parts, flyash and desulfurated plasters are delivered to and in stirrer, carry out mix and blend, churning time is 1～5 minute, stirring velocity is 130～150 revs/min, when stirring, add 15～30 parts of 8～13 parts of unslaked limes and river sands, after stirring, add again 1～5 part of cement to carry out mix and blend 1～3 minute, finally add again the water of 20～25 parts to stir 5～15 minutes;
Step 3, moulding: the compound after stirring in step 2 is delivered to the processing that is pressed in forming machine, and forming pressure is 20～30MPa, makes adobe;
Step 4, maintenance: the adobe of making in step 3 is carried out to maintenance, obtain non-burning brick or building block.
Preferably, the described flyash that utilizes extracts the method that aluminum oxide by product is prepared non-burning brick building block, maintenance described in step 4 is natural curing, natural curing obtain non-burning brick or building block for 28 days, the specific implementation process of natural curing is to carry out maintenance under outside temperature is the condition of 20～25 DEG C, the first seven of maintenance day every day, continuous spraying stopped after 7 days all to jetting liquid in the adobe of making three to five times.
Preferably, the described flyash that utilizes extracts the method that aluminum oxide by product is prepared non-burning brick building block, in maintenance processes, all spray the first liquid first three day every day in the adobe of making, all spray the second liquid latter three day every day in the adobe of making, and spray the third liquid the last day in the adobe of making.
Preferably, the described flyash that utilizes extracts the method that aluminum oxide by product is prepared non-burning brick building block, described the first liquid is nitrous acid calcium solution, and described the second liquid is the mixed solvent of ferrous sulfate and trolamine, and described the third liquid is metabisulfite solution.
Preferably, the described flyash that utilizes extracts the method that aluminum oxide by product is prepared non-burning brick or building block, and described cement is silicate cement, aluminosulfate cement, glass fiber reinforced cement, self-stress ferro-aluminate cement or white cement, colored cement.
Preferably, the described flyash that utilizes extracts the method that aluminum oxide by product is prepared non-burning brick or building block, and the forming pressure described in step 3 is 25MPa.
The flyash that utilizes of the present invention extracts the method that aluminum oxide by product is prepared non-burning brick or building block, compared with prior art, the one, adopt calcium silicate slag, calcium silicate slag has the characteristic that calcium oxide content is high, alkali content is low, its chemical composition and cement clinker are close, mainly with CaO and SiO
2be main, mineral composition is taking Y-Dicalcium Phosphate (Feed Grade) as main.Be 75% through its activity index of experimental test, reached the activity index requirement of national Specification industrial residue.Therefore, this material is the mineral material with certain activity, can have the performance characteristics of performance some strength.The 2nd, utilize fly ash in electric power plant, wet process of FGD by-produced gypsum to prepare burden, desulfurated plaster major ingredient is CaSO4, CaCO3 and Ca (OH) 2, can set it as preparation raw material non-burning brick, building block and mix, realize the recycling of solid waste.The 3rd, the highest usage quantity of solid waste reaches more than 70%, raw materials used cheap, has higher economic benefit and social benefit.The 4th, production process is pollution-free, without firing, without the measure such as steam-cured, has the advantages such as product strength is high, heat-insulation and heat-preservation, energy-conserving profit waste, once shaped.The 5th, in the last maintenance stage, a few days ago all in adobe, spray the liquid configuring, can effectively strengthen the intensity of adobe.The present invention by optimizing materials proportioning, has improved the utilization ratio of the trade waste such as calcium silicate slag, flyash, has solved current industrial waste discharge amount excessive and can not get the problem of effectively utilizing.By adopting rational production technique, in the situation that guaranteeing that brick strength meets national standard, reduce brick body production cost, there is good economic benefit and social benefit.
Brief description of the drawings
Fig. 1 is that the flyash that utilizes of the present invention extracts the schema that aluminum oxide by product is prepared the method for non-burning brick or building block.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to specification sheets word.
Embodiment 1:
The invention provides a kind of flyash that utilizes and extract the method that aluminum oxide by product is prepared non-burning brick or building block, comprising:
The pre-treatment of step 1, raw material: respectively calcium silicate slag, desulfurated plaster and unslaked lime are carried out to grinding formation≤180 object powder, with for subsequent use, wherein, calcium silicate slag is the alumina clinker and the solid waste producing after alkali lye mixing stripping that flyash generates with raw meal prepared from lime calcining;
Step 2, by weight first by calcium silicate slag 45Kg, flyash 25Kg and desulfurated plaster 5Kg are delivered to and in stirrer, carry out mix and blend, churning time is 5 minutes, stirring velocity is 150 revs/min, when stirring, add unslaked lime 13Kg and river sand 30Kg part, after stirring, add cement 5Kg to carry out mix and blend 3 minutes again, finally add the water of 25Kg to stir 15 minutes again, described cement is silicate cement;
Step 3, moulding: the compound after stirring in step 2 is delivered to the processing that is pressed in forming machine, and forming pressure is 30MPa, makes adobe;
Step 4, maintenance: the adobe of making in step 3 is carried out to natural curing, natural curing obtain non-burning brick or building block for 28 days, the specific implementation process of natural curing is to carry out maintenance under outside temperature is the condition of 25 DEG C, the first seven of maintenance day every day is all to jetting liquid in the adobe of making three to five times, continuous spraying stopped after 7 days, in maintenance processes, all spray nitrous acid calcium solution first three day every day in the adobe of making, latter three day every day is all to the mixed solvent that sprays ferrous sulfate and trolamine in the adobe of making, the last day is to sulfuring up acid sodium solution in the adobe of making.
The property indices such as step 5, outward appearance by standard to product, intensity, weight are tested, and during 7 days, 28 days, detect ultimate compression strength in maintenance, dispatch from the factory after the assay was approved.
Non-burning brick, block performance detected result:
Embodiment 2:
The invention provides a kind of flyash that utilizes and extract the method that aluminum oxide by product is prepared non-burning brick or building block, comprising:
The pre-treatment of step 1, raw material: respectively calcium silicate slag, desulfurated plaster and unslaked lime are carried out to grinding formation≤180 object powder, with for subsequent use, wherein, calcium silicate slag is the alumina clinker and the solid waste producing after alkali lye mixing stripping that flyash generates with raw meal prepared from lime calcining;
Step 2, by weight first by calcium silicate slag 35Kg, flyash 15Kg and desulfurated plaster 3Kg are delivered to and in stirrer, carry out mix and blend, churning time is 1 minute, stirring velocity is 130 revs/min, when stirring, add unslaked lime 8Kg and river sand 15Kg, after stirring, add cement 1Kg to carry out mix and blend 1～3 minute again, finally add the water of 20Kg to stir 5 minutes again, described cement is aluminosulfate cement;
Step 3, moulding: the compound after stirring in step 2 is delivered to the processing that is pressed in forming machine, and forming pressure is 20MPa, makes adobe;
Step 4, maintenance: the adobe of making in step 3 is carried out to natural curing, natural curing obtain non-burning brick or building block for 28 days, the specific implementation process of natural curing is to carry out maintenance under outside temperature is the condition of 20 DEG C, the first seven of maintenance day every day is all to jetting liquid in the adobe of making three to five times, continuous spraying stopped after 7 days, in maintenance processes, all spray nitrous acid calcium solution first three day every day in the adobe of making, latter three day every day is all to the mixed solvent that sprays ferrous sulfate and trolamine in the adobe of making, the last day is to sulfuring up acid sodium solution in the adobe of making.
The property indices such as step 5, outward appearance by standard to product, intensity, weight are tested, and during 7 days, 28 days, detect ultimate compression strength in maintenance, dispatch from the factory after the assay was approved.
Non-burning brick, block performance detected result:
Embodiment 3:
The invention provides a kind of flyash that utilizes and extract the method that aluminum oxide by product is prepared non-burning brick or building block, comprising:
The pre-treatment of step 1, raw material: respectively calcium silicate slag, desulfurated plaster and unslaked lime are carried out to grinding formation≤180 object powder, with for subsequent use, wherein, calcium silicate slag is the alumina clinker and the solid waste producing after alkali lye mixing stripping that flyash generates with raw meal prepared from lime calcining;
Step 2, by weight first by calcium silicate slag 40Kg, flyash 20Kg and desulfurated plaster 4Kg are delivered to and in stirrer, carry out mix and blend, churning time is 3 minutes, stirring velocity is 140 revs/min, when stirring, add unslaked lime 10Kg and river sand 22Kg, after stirring, add cement 3Kg to carry out mix and blend 2 minutes again, finally add the water of 22Kg to stir 10 minutes again, described cement is glass fiber reinforced cement;
Step 3, moulding: the compound after stirring in step 2 is delivered to the processing that is pressed in forming machine, and forming pressure is 25MPa, makes adobe;
Step 4, maintenance: the adobe of making in step 3 is carried out to natural curing, natural curing obtain non-burning brick or building block for 28 days, the specific implementation process of natural curing is to carry out maintenance under outside temperature is the condition of 22 DEG C, the first seven of maintenance day every day is all to jetting liquid in the adobe of making three to five times, continuous spraying stopped after 7 days, in maintenance processes, all spray nitrous acid calcium solution first three day every day in the adobe of making, latter three day every day is all to the mixed solvent that sprays ferrous sulfate and trolamine in the adobe of making, the last day is to sulfuring up acid sodium solution in the adobe of making.
The property indices such as step 5, outward appearance by standard to product, intensity, weight are tested, and during 7 days, 28 days, detect ultimate compression strength in maintenance, dispatch from the factory after the assay was approved.
Non-burning brick, block performance detected result:
Non-burning brick or the building block flat appearance making by aforesaid method, N/D and slight crack, have good mechanical property, and requirement is up to state standards.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification sheets and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.
Claims (6)
1. utilize flyash to extract the method that aluminum oxide by product is prepared non-burning brick or building block, it is characterized in that, comprise the following steps:
The pre-treatment of step 1, raw material: respectively calcium silicate slag, desulfurated plaster and unslaked lime are carried out to grinding formation≤180 object powder, with for subsequent use, wherein, calcium silicate slag is the alumina clinker and the solid waste producing after alkali lye mixing stripping that flyash generates with raw meal prepared from lime calcining;
Step 2, by weight first by 35～45 parts of calcium silicate slags, 3～5 parts of 15～25 parts, flyash and desulfurated plasters are delivered to and in stirrer, carry out mix and blend, churning time is 1～5 minute, stirring velocity is 130～150 revs/min, when stirring, add 15～30 parts of 8～13 parts of unslaked limes and river sands, after stirring, add again 1～5 part of cement to carry out mix and blend 1～3 minute, finally add again the water of 20～25 parts to stir 5～15 minutes;
Step 3, moulding: the compound after stirring in step 2 is delivered to the processing that is pressed in forming machine, and forming pressure is 20～30MPa, makes adobe;
Step 4, maintenance: the adobe of making in step 3 is carried out to maintenance, obtain non-burning brick or building block.
2. the flyash that utilizes as claimed in claim 1 extracts the method that aluminum oxide by product is prepared non-burning brick building block, it is characterized in that, maintenance described in step 4 is natural curing, natural curing obtain non-burning brick or building block for 28 days, the specific implementation process of natural curing is to carry out maintenance under outside temperature is the condition of 20～25 DEG C, the first seven of maintenance day every day, continuous spraying stopped after 7 days all to jetting liquid in the adobe of making three to five times.
3. the flyash that utilizes as claimed in claim 2 extracts the method that aluminum oxide by product is prepared non-burning brick building block, it is characterized in that, in maintenance processes, all spray the first liquid first three day every day in the adobe of making, all spray the second liquid latter three day every day in the adobe of making, and spray the third liquid the last day in the adobe of making.
4. the flyash that utilizes as claimed in claim 3 extracts the method that aluminum oxide by product is prepared non-burning brick building block, it is characterized in that, described the first liquid is nitrous acid calcium solution, and described the second liquid is the mixed solvent of ferrous sulfate and trolamine, and described the third liquid is metabisulfite solution.
5. the flyash that utilizes as claimed in claim 1 extracts the method that aluminum oxide by product is prepared non-burning brick or building block, it is characterized in that, described cement is silicate cement, aluminosulfate cement, glass fiber reinforced cement, self-stress ferro-aluminate cement or white cement, colored cement.
6. the flyash that utilizes as claimed in claim 5 extracts the method that aluminum oxide by product is prepared non-burning brick or building block, it is characterized in that, the forming pressure described in step 3 is 25MPa.
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| CN201410063604.0A CN103964801B (en) | 2014-02-25 | 2014-02-25 | A kind of flyash extraction aluminum oxide by product that utilizes prepares method that is non-burning brick or building block |
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| CN105254265A (en) * | 2015-09-29 | 2016-01-20 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Calcium silicon slag autoclaved brick and manufacturing method thereof |
| CN105481336A (en) * | 2015-12-30 | 2016-04-13 | 南通天蓝环保能源成套设备有限公司 | Method for preparing high-strength baking-free brick from domestic refuse incinerator slag |
| CN105693148A (en) * | 2014-11-27 | 2016-06-22 | 中国科学院过程工程研究所 | Lightweight thermal-insulation building block and preparation method thereof |
| CN107619249A (en) * | 2017-10-10 | 2018-01-23 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Mine filling material and preparation method thereof |
| CN108911622A (en) * | 2018-06-29 | 2018-11-30 | 中国神华能源股份有限公司 | A kind of white clay base water-permeable brick and preparation method thereof |
| CN112960922A (en) * | 2021-02-03 | 2021-06-15 | 中冶南方都市环保工程技术股份有限公司 | Desulfurized fly ash based cementing material and preparation and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105693148A (en) * | 2014-11-27 | 2016-06-22 | 中国科学院过程工程研究所 | Lightweight thermal-insulation building block and preparation method thereof |
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| CN105254265B (en) * | 2015-09-29 | 2017-12-19 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Silico-calcium slag autoclaved brick and its manufacture method |
| CN105481336A (en) * | 2015-12-30 | 2016-04-13 | 南通天蓝环保能源成套设备有限公司 | Method for preparing high-strength baking-free brick from domestic refuse incinerator slag |
| CN107619249A (en) * | 2017-10-10 | 2018-01-23 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Mine filling material and preparation method thereof |
| CN108911622A (en) * | 2018-06-29 | 2018-11-30 | 中国神华能源股份有限公司 | A kind of white clay base water-permeable brick and preparation method thereof |
| CN108911622B (en) * | 2018-06-29 | 2021-07-30 | 中国神华能源股份有限公司 | White mud-based water permeable brick and preparation method thereof |
| CN112960922A (en) * | 2021-02-03 | 2021-06-15 | 中冶南方都市环保工程技术股份有限公司 | Desulfurized fly ash based cementing material and preparation and application thereof |
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