CN102898179B - Method for preparing magnesium oxychloride cement product by using high-calcium light-burnt magnesite powder - Google Patents
Method for preparing magnesium oxychloride cement product by using high-calcium light-burnt magnesite powder Download PDFInfo
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Abstract
The invention relates to a method for preparing a magnesium oxychloride cement product by using light-burnt magnesite powder, in particular to the method for preparing the magnesium oxychloride cement product by using high-calcium light-burnt magnesite powder. According to the method, the high-calcium light-burnt magnesite powder is used as a raw material, an appropriate modifier, additive, plant fibers, a forming agent, and a dispersing agent are used in a matched way, the proportion of all raw materials is reasonably adjusted, the material adding sequence and the process operation parameters such as temperature, humidity and concentration are optimized, the structure and the performance of the conventional magnesium oxychloride cement are greatly improved, and a qualified light partition board is obtained; and in the whole technological process, reaction and modification are organically coupled, the discharge of wastes is avoided, and process conditions are mild. The process is simple, the discharge of wastes is avoided, the requirement of equipment is low, production cost is low, and the comprehensive development and utilization of low-grade high-calcium magnesite resources is facilitated; and the obtained light partition board meets all indexes of the national JG/T169-2005 standard.
Description
Technical field
The present invention relates to the method preparing magnesium oxychloride cement product with magnesite light burnt powder, is the method that high calcium magnesite light burnt powder prepares magnesium oxychloride cement product.
Background technology
Magnesia oxychloride cement is a kind of by the gelling material of French scholar's Sorel in the air-setting of invention in 1867, is be in harmonious proportion according to a certain ratio by light calcined magnesia, magnesium chloride and water three to form.Magnesia oxychloride cement has the following advantages: (1) fast solidifying; (2) stronger resistance to compression, folding strength; (3) good wear resistance, is 3 times of ordinary Portland cement; (4) cohesiveness is good, has good cohesiveness to other material except metallic substance; (5) outstanding flame retardant resistance and good thermal insulation, magnesium oxide and magnesium chloride are all non-flammable; (6) utilization rate of solid waste is high, and incorporation can reach more than 30%; (7) use temperature is between subzero 30 degrees Celsius and 300 degrees Celsius; (8) density is low, and density generally only has 70% of ordinary Portland cement.Magnesium oxychloride cement product has alternative timber, energy-conservation, instead of clay materials for wall, and the function of preserving the ecological environment, meets the demand for development of current construction resource-conserving and environmentally friendly society.
But magnesium oxychloride cement product also has remarkable shortcoming: the easy damp suction surface halide accumulation of (1) wet environment; (2) the easy buckling deformation of goods; (3) article water resistance is poor; (4) product surface scum rise white.In addition, magnesium oxychloride cement product is also comparatively strict to ingredient requirement, there is the problem adopting workshop-based and other production models lack of standardization in current domestic production magnesia oxychloride cement, needs technological innovation and standardized management badly, with the road making this industry go on the health of Sustainable development.
The general practice of current raising magnesium oxychloride cement product performance adds properties-correcting agent to carry out modification, utilize simultaneously some be rich in iron, aluminium, silicon industrial residue, tailings etc. make weighting material, improve product properties.
The resources such as abundant magnesite and coal are had due to Shanshan, Xinjiang county, have and produce the good low-cost advantage of light burnt powder, but it is low to there is grade in Shanshan, Xinjiang county magnesite, the problems such as calcic is high, make it utilize and be subject to larger restriction, only have a small amount of exploitation and rudimentary application at present, the magnesium oxychloride product produced in Shanshan, Xinjiang county at present light burnt powder used needs to purchase from northeast, both cause local resources to leave unused, greatly add production cost again.
Summary of the invention
The invention provides the method that high calcium magnesite light burnt powder prepares magnesium oxychloride cement product, overcome the deficiency of above-mentioned prior art, effectively can solve the problem of existing production cost high and low grade high calcium magnesite resource underutilization.
Technical scheme of the present invention is realized by following measures: a kind of high calcium magnesite light burnt powder prepares the method for magnesium oxychloride cement product, comprise and utilize low-grade high-calcium magnesite light burnt powder as raw material, auxiliary with suitable properties-correcting agent, addition material, vegetable fibre, whipping agent, dispersion agent, by each proportioning raw materials of rational allocation, optimize reinforced order and temperature, humidity, concentration process operating parameters, whole technological process will be reacted and modification organic coupling.
Here is the further optimization and/or improvements to foregoing invention technical scheme two:
Above-mentioned light burnt powder can refer to high calcium magnesite light burnt powder.
Above-mentioned without strong acid and highly basic add and less demanding to equipment material.
In above-mentioned light burnt powder and addition material, each valuable element is all utilized, and raw material availability is high, does not have waste discharge.
Technical scheme of the present invention is realized by following measures: high calcium magnesite light burnt powder prepares the method for magnesium oxychloride cement product, carries out in the steps below:
The first step, adds magnesium chloride hexahydrate and water in box steel basin, is mixed with the solution that mass concentration is 21-27%, leaves standstill clarification 10 minutes to 15 minutes;
Second step, will be 4 ~ 8:3 ~ 7 with low calcium light burnt powder mass ratio and order number adds in steel basin at 150 order to 200 object high calcium magnesite light burnt powders, stir 5 minutes to 10 minutes;
Addition is that the properties-correcting agent of light burnt powder amount 0.8% to 3% to add in steel basin and to stir by the 3rd step;
4th step, will with high calcium magnesite light burnt powder mass ratio be 3 ~ 7:4 ~ 8 order number at the low calcium light burnt powder of 150 order to 200 object, to add in steel basin and to stir;
5th step, to add the additive accounting for reaction system material 1% in steel basin and to stir;
6th step, to add the addition material accounting for reaction system material 1% ~ 3% in steel basin and to stir;
7th step, to add the whipping agent accounting for reaction system material 1% in steel basin and to stir;
8th step, puts into mould by the 7th step gained material, makes material be full of mould and jolt ramming; According to the temperature and humidity of external environment, the subsidiary well heater of adjustment mould makes urethane cure, extracts out in mould and manage after 90 minutes to 120 minutes, continues to make urethane cure, shaping; Die sinking after 50 minutes to 70 minutes, the then demoulding goods are shifted out mould, and continue temperature be 15 degrees Celsius to 28 degrees Celsius, humidity be 40% to 60% and well-ventilated's condition under lower maintenance more than 7 days, make goods reach better performance;
9th step, polishes to the 8th step resulting product, equating and cutting edge shaping subsequent disposal, obtains qualified light cellular partition board.
Properties-correcting agent in above-mentioned 3rd step is ferrous sulfate and phosphoric acid; Magnesium oxide in reaction system, mol ratio between magnesium chloride and water control in 3 ~ 8:1:13 ~ 18; Additive in 5th step is dispersion agent or animal palm fiber or vegetable fibre; Addition material in 6th step is stone flour or silicon ash or flyash or magnesite chemical treatment waste residue; 7th step whipping agent is for principal ingredients with gelatine and caustic soda.
Above-mentioned magnesium chloride hexahydrate addition is 109 kilograms to 138 kilograms, the addition of water be 84 kilograms to double centner, high calcium magnesite light burnt powder addition is 63 kilograms to 75 kilograms, low calcium light burnt powder addition be 84 kilograms to double centner, dispersion agent addition is 1 kilogram, and whipping agent addition is 20 kilograms to 25 kilograms, stone flour addition is 0 kilogram to 50 kilograms, palm fiber addition is 2 kilograms, and ferrous sulfate addition is 5 kilograms to 6 kilograms, and phosphoric acid addition is 1 kilogram.
Process of the present invention is simple, without the discharge of waste, equipment requirements is not high, low production cost, be conducive to the comprehensive development and utilization of low-grade high-calcium magnesite resource, the light cellular partition board that the present invention obtains has reached national JG/T 169-2005 standard indices, have the advantages that the addition of higher resistance to compression folding intensity and addition material is larger, as stone flour addition reaches 20% ~ 30% of light burnt powder amount, have stronger fireproof heat insulating performance, the inventive method can obtain the good light partition wall slab products of performance simultaneously; Whole production process does not have the participation of strong acid and highly basic, and require lower, easy to operation to equipment material, be easy to continuous prodution, the present invention is that the exploitation of low-grade high-calcium magnesite resource provide novel method.
Accompanying drawing explanation
Accompanying drawing 1 is the best processing route figure of the present invention.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1, the method that this high calcium magnesite light burnt powder prepares magnesium oxychloride cement product is carried out in the steps below:
The first step, adds 138 kilograms of magnesium chloride hexahydrates and double centner water, is mixed with 25.5%(mass concentration in box steel basin) solution, leave standstill clarification 10 minutes to 15 minutes;
Second step, by 75 kilograms and order number adds in steel basin at 200 object high calcium magnesite light burnt powders, stirs 5 minutes to 10 minutes;
7 kilograms of properties-correcting agent to be added in steel basin and to stir by the 3rd step;
4th step, by double centner order number at the low calcium light burnt powder of 150 order to 200 object, to add in steel basin and to stir;
3 kilograms of additives to be added in steel basin and to stir by the 5th step;
6th step, to add 0 kilogram of addition material in steel basin and to stir;
20 kilograms of whipping agents to be added in steel basin and to stir by the 7th step;
8th step, puts into mould by the 7th step gained material, makes material be full of mould and jolt ramming; According to the temperature and humidity of external environment, the subsidiary well heater of adjustment mould makes urethane cure, extracts out in mould and manage after 90 minutes to 120 minutes, continues to make urethane cure, shaping; Die sinking after 50 minutes to 70 minutes, the then demoulding goods are shifted out mould, and continue temperature be 15 degrees Celsius to 28 degrees Celsius, humidity be 40% to 60% and well-ventilated's condition under lower maintenance more than 7 days, make goods reach better performance;
9th step, polishes to the 8th step resulting product, equating and cutting edge shaping subsequent disposal, obtains qualified light cellular partition board.
Embodiment 2, the method that this high calcium magnesite light burnt powder prepares magnesium oxychloride cement product is carried out in the steps below:
The first step, adds 113 kilograms of magnesium chloride hexahydrates and 84 kg water, is mixed with 24.7%(mass concentration in box steel basin) solution, leave standstill clarification 10 minutes to 15 minutes;
Second step, by 63 kilograms and order number adds in steel basin at 200 object high calcium magnesite light burnt powders, stirs 5 minutes to 10 minutes;
6 kilograms of properties-correcting agent to be added in steel basin and to stir by the 3rd step;
4th step, by 84 kilograms of order numbers at the low calcium light burnt powder of 150 order to 200 object, to add in steel basin and to stir;
3 kilograms of additives to be added in steel basin and to stir by the 5th step;
40 kilograms of addition materials to be added in steel basin and to stir by the 6th step;
25 kilograms of whipping agents to be added in steel basin and to stir by the 7th step;
8th step, puts into mould by the 7th step gained material, makes material be full of mould and jolt ramming; According to the temperature and humidity of external environment, the subsidiary well heater of adjustment mould makes urethane cure, extracts out in mould and manage after 90 minutes to 120 minutes, continues to make urethane cure, shaping; Die sinking after 50 minutes to 70 minutes, the then demoulding goods are shifted out mould, and continue temperature be 15 degrees Celsius to 28 degrees Celsius, humidity be 40% to 60% and well-ventilated's condition under lower maintenance more than 7 days, make goods reach better performance;
9th step, polishes to the 8th step resulting product, equating and cutting edge shaping subsequent disposal, obtains qualified light cellular partition board.
Embodiment 3, the method that this high calcium magnesite light burnt powder prepares magnesium oxychloride cement product is carried out in the steps below:
The first step, adds 109 kilograms of magnesium chloride hexahydrates and 84 kg water, is mixed with 24.8%(mass concentration in box steel basin) solution, leave standstill clarification 10 minutes to 15 minutes;
Second step, by 63 kilograms and order number adds in steel basin at 150 order to 200 object high calcium magnesite light burnt powders, stirs 5 minutes to 10 minutes;
6 kilograms of properties-correcting agent to be added in steel basin and to stir by the 3rd step;
4th step, by 84 kilograms of order numbers at the low calcium light burnt powder of 150 order to 200 object, to add in steel basin and to stir;
3 kilograms of additives to be added in steel basin and to stir by the 5th step;
50 kilograms of addition materials to be added in steel basin and to stir by the 6th step;
22 kilograms of whipping agents to be added in steel basin and to stir by the 7th step;
8th step, puts into mould by the 7th step gained material, makes material be full of mould and jolt ramming; According to the temperature and humidity of external environment, the subsidiary well heater of adjustment mould makes urethane cure, extracts out in mould and manage after 90 minutes to 120 minutes, continues to make urethane cure, shaping; Die sinking after 50 minutes to 70 minutes, the then demoulding goods are shifted out mould, and continue temperature be 15 degrees Celsius to 28 degrees Celsius, humidity be 40% to 60% and well-ventilated's condition under lower maintenance more than 7 days, make goods reach better performance;
9th step, polishes to the 8th step resulting product, equating and cutting edge shaping subsequent disposal, obtains qualified light cellular partition board.
Embodiment 4, the method that this high calcium magnesite light burnt powder prepares magnesium oxychloride cement product is carried out in the steps below:
The first step, adds 109 kilograms to 138 kilograms magnesium chloride hexahydrates and 84 kilograms to double centner water, is mixed with the solution of 21% to 27% degree Beaume in box steel basin, leaves standstill clarification 10 minutes to 15 minutes;
Second step, by 63 kilograms to 75 kilograms and order number adds in steel basin at 150 order to 200 object high calcium magnesite light burnt powders, stirs 5 minutes to 10 minutes;
6 kilograms to 7 kilograms properties-correcting agent to be added in steel basin and to stir by the 3rd step;
4th step, by 84 kilograms to double centner order number at the low calcium light burnt powder of 150 order to 200 object, to add in steel basin and to stir;
3 kilograms of additives to be added in steel basin and to stir by the 5th step;
6th step, to add 0 kilogram to 50 kilograms addition material in steel basin and to stir;
20 kilograms to 25 kilograms whipping agents to be added in steel basin and to stir by the 7th step;
8th step, puts into mould by the 7th step gained material, makes material be full of mould and jolt ramming; According to the temperature and humidity of external environment, the subsidiary well heater of adjustment mould makes urethane cure, extracts out in mould and manage after 90 minutes to 120 minutes, continues to make urethane cure, shaping; Die sinking after 50 minutes to 70 minutes, the then demoulding goods are shifted out mould, and continue temperature be 15 degrees Celsius to 28 degrees Celsius, humidity be 40% to 60% and well-ventilated's condition under lower maintenance more than 7 days, make goods reach better performance;
9th step, polishes to the 8th step resulting product, equating and cutting edge shaping subsequent disposal, obtains qualified light cellular partition board.
Embodiment 5, the method that this high calcium magnesite light burnt powder prepares magnesium oxychloride cement product is carried out in the steps below:
The first step, adds magnesium chloride hexahydrate and water in box steel basin, and environmentally temperature is mixed with mass concentration is 21% to 27% solution, leaves standstill clarification 10 minutes to 15 minutes;
Second step, will be 4 ~ 8:3 ~ 7 with low calcium light burnt powder mass ratio and order number adds in steel basin at 200-250 object high calcium magnesite light burnt powder, stir 5 minutes to 10 minutes;
Addition is that the properties-correcting agent of light burnt powder amount 0.8% to 3% to add in steel basin and to stir by the 3rd step;
4th step, to add high calcium magnesite light burnt powder and order number in steel basin according to mass ratio 4 ~ 8:3 ~ 7 at the low calcium light burnt powder in 200-250 object Haicheng and stirs;
5th step, to add the additive accounting for reaction system material 1% in steel basin and to stir;
6th step, to add the addition material accounting for reaction system material 1% ~ 3% in steel basin and to stir;
7th step, to add the whipping agent accounting for reaction system material 1% in steel basin and to stir;
8th step, puts into mould by the 7th step gained material, makes material be full of mould and jolt ramming; According to the temperature and humidity of external environment, the subsidiary well heater of adjustment mould makes urethane cure, extracts out in mould and manage after 90 minutes to 120 minutes, continues to make urethane cure, shaping; Die sinking after 50 minutes to 70 minutes, the then demoulding goods are shifted out mould, and continue temperature be 15 degrees Celsius to 28 degrees Celsius, humidity be 40% to 60% and well-ventilated's condition under lower maintenance more than 7 days, make goods reach better performance;
9th step, polishes to the 8th step resulting product, equating and cutting edge shaping subsequent disposal, obtains qualified light cellular partition board.
In the present invention: high calcium magnesite light burnt powder can adopt Shanshan, Xinjiang county high calcium magnesite light burnt powder, and its principal element chemical constitution as shown in Table 1.
Table one Shanshan, Xinjiang county high calcium magnesite light burnt powder principal element chemical constitution
| Composition | MgO | CaO | Fe 2O 3 | SiO 2 | Al 2O 3 | Active MgO | Free CaO | Burning decrement |
| Content/% | 71.89 | 15.94 | 1.7 | 1.05 | 1.28 | 64.93 | 12.1 | 9.34 |
In the present invention: low calcium magnesite light burnt powder can adopt Haicheng low calcium magnesite light burnt powder, and its principal element chemical constitution as shown in Table 2.
Table two Haicheng low calcium magnesite light burnt powder principal element chemical constitution
| Composition | MgO | CaO | Fe2O 3 | SiO 2 | Al 2O 3 | Active MgO | Free CaO | Burning decrement |
| Content/% | 86.61 | 0.94 | 0.14 | 6.71 | 1.45 | 65.46 | 0.67 | 7.65 |
In the present invention: magnesium chloride hexahydrate can adopt To Golmud of Qinghai magnesium chloride hexahydrate, it as shown in Table 3.
The solution properties of table three To Golmud of Qinghai magnesium chloride hexahydrate
| Degree Beaume/Be ° | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 30 | 32 | 34 | 36 |
| Relative density/ | 1.18 | 1.19 | 1.2 | 1.21 | 1.22 | 1.23 | 1.24 | 1.26 | 1.28 | 1.3 | 1.3 |
| Massfraction/% | 19.95 | 20.8 | 22 | 22.4 | 23.2 | 24.1 | 25.1 | 26.9 | 29.5 | 31 | 32 |
Above-mentioned example draws under the actual environment condition of Shanshan, Xinjiang locality, different areas is due to temperature and humidity difference, may discordance be there is in operational condition, need to adjust accordingly according to practical situation, after tested, light cellular partition board obtained in example of the present invention has reached national JG/T 169-2005 standard indices, and in the inventive method embodiment, obtained light cellular partition board has following features: (1) has higher resistance to compression, folding strength; (2) addition of addition material is comparatively large, as stone flour addition reaches 20% ~ 30% of light burnt powder amount; (3) obtained light cellular partition board has stronger fireproof heat insulating performance.
Claims (2)
1. high calcium magnesite light burnt powder prepares a method for magnesium oxychloride cement product, it is characterized in that carrying out in the steps below:
The first step, adds 113 kilograms of magnesium chloride hexahydrates and 84 kg water in box steel basin, is mixed with the solution that mass concentration is 24.7%, leaves standstill clarification 10 minutes to 15 minutes;
Second step, by 63 kilograms and order number adds in steel basin at 200 object high calcium magnesite light burnt powders, stirs 5 minutes to 10 minutes;
6 kilograms of properties-correcting agent to be added in steel basin and to stir by the 3rd step;
4th step, by 84 kilograms of order numbers at the low calcium light burnt powder of 150 order to 200 object, to add in steel basin and to stir;
3 kilograms of additives to be added in steel basin and to stir by the 5th step;
40 kilograms of addition materials to be added in steel basin and to stir by the 6th step;
25 kilograms of whipping agents to be added in steel basin and to stir by the 7th step;
8th step, puts into mould by the 7th step gained material, makes material be full of mould and jolt ramming; According to the temperature and humidity of external environment, the subsidiary well heater of adjustment mould makes urethane cure, extracts out in mould and manage after 90 minutes to 120 minutes, continues to make urethane cure, shaping; Die sinking after 50 minutes to 70 minutes, the then demoulding goods are shifted out mould, and continue temperature be 15 degrees Celsius to 28 degrees Celsius, humidity be 40% to 60% and well-ventilated's condition under lower maintenance more than 7 days, make goods reach better performance;
9th step, polishes to the 8th step resulting product, equating and cutting edge shaping subsequent disposal, obtains qualified light cellular partition board;
Wherein: properties-correcting agent is ferrous sulfate and phosphoric acid; Additive is dispersion agent or animal palm fiber or vegetable fibre; Addition material is stone flour or silicon ash or flyash or magnesite chemical treatment waste residue; Whipping agent is for principal ingredients with gelatine and caustic soda.
2. high calcium magnesite light burnt powder prepares a method for magnesium oxychloride cement product, it is characterized in that carrying out in the steps below:
The first step, adds 109 kilograms of magnesium chloride hexahydrates and 84 kg water in box steel basin, is mixed with the solution that mass concentration is 24.8%, leaves standstill clarification 10 minutes to 15 minutes;
Second step, by 63 kilograms and order number adds in steel basin at 150 order to 200 object high calcium magnesite light burnt powders, stirs 5 minutes to 10 minutes;
6 kilograms of properties-correcting agent to be added in steel basin and to stir by the 3rd step;
4th step, by 84 kilograms of order numbers at the low calcium light burnt powder of 150 order to 200 object, to add in steel basin and to stir;
3 kilograms of additives to be added in steel basin and to stir by the 5th step;
50 kilograms of addition materials to be added in steel basin and to stir by the 6th step;
22 kilograms of whipping agents to be added in steel basin and to stir by the 7th step;
8th step, puts into mould by the 7th step gained material, makes material be full of mould and jolt ramming; According to the temperature and humidity of external environment, the subsidiary well heater of adjustment mould makes urethane cure, extracts out in mould and manage after 90 minutes to 120 minutes, continues to make urethane cure, shaping; Die sinking after 50 minutes to 70 minutes, the then demoulding goods are shifted out mould, and continue temperature be 15 degrees Celsius to 28 degrees Celsius, humidity be 40% to 60% and well-ventilated's condition under lower maintenance more than 7 days, make goods reach better performance;
9th step, polishes to the 8th step resulting product, equating and cutting edge shaping subsequent disposal, obtains qualified light cellular partition board;
Wherein: properties-correcting agent is ferrous sulfate and phosphoric acid; Additive is dispersion agent or animal palm fiber or vegetable fibre; Addition material is stone flour or silicon ash or flyash or magnesite chemical treatment waste residue; Whipping agent is for principal ingredients with gelatine and caustic soda.
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| CN106116644B (en) * | 2016-06-29 | 2019-03-08 | 杨红健 | A kind of foaming magnesium oxychloride latex composite material and preparation method for prefabricated partition board |
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| CN101423349A (en) * | 2008-11-24 | 2009-05-06 | 吴志棠 | Foaming magnesium oxychloride cement and use method thereof |
| CN102020453B (en) * | 2010-10-08 | 2013-04-03 | 眭良 | High-strength inorganic magnesium cement building template and production method thereof |
| CN102701706A (en) * | 2012-05-17 | 2012-10-03 | 中国科学院过程工程研究所 | Resource utilization method for red gypsum produced by means of sulfuric acid process of titanium dioxide factory |
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