Method for preparing lightweight functional wall material from titanium gypsum composite material

Abstract

The invention discloses a method for preparing a lightweight functional wall material from a titanium gypsum composite material, which comprises the following steps: preparing titanium II type anhydrous gypsum by using titanium gypsum as a raw material, and uniformly mixing 30-50 parts of titanium II type anhydrous gypsum with 20-30 parts of slag, 10-20 parts of fly ash, 5-10 parts of metakaolin, 1-3 parts of lime and 1-5 parts of cement clinker in proportion to obtain a hydraulic titanium gypsum composite cementing material; uniformly mixing 50 to 65 parts of the hydraulic titanium gypsum composite cementing material with 1 to 5 parts of polyphenyl granules, 5 to 15 parts of glass beads, 0.01 to 0.03 part of an air entraining agent, 0.05 to 0.2 part of a cellulose water-retaining agent, 0.1 to 0.2 part of rubber powder and 25 to 35 parts of water to obtain the lightweight functional wall material. The titanium gypsum can be fully utilized to prepare the light functional wall material with more excellent use performance, energy conservation and environmental protection are achieved, the utilization value of the titanium gypsum can be effectively improved, and a new choice is provided for materials used in the building industry.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a method for preparing a lightweight functional wall material using a titanium gypsum composite material. Background Art

[0002] Titanium dioxide factories produce acidic wastewater when producing titanium dioxide. The waste residue obtained by adding limestone to the acidic wastewater to neutralize it is titanium gypsum. Long-term storage of titanium gypsum will bring a series of problems, and as time goes by, the amount of titanium gypsum will only increase, causing physical and chemical hazards to the environment. In addition, titanium gypsum also contains nickel, cobalt, chromium and other elements that are harmful to the human body. They enter the groundwater through rainwater erosion, causing serious heavy metal pollution. Drinking contaminated water will cause great harm to the human body.

[0003] Lightweight functional wall materials refer to a type of wall materials with multiple functions such as light weight, high strength, fire resistance, sound insulation, heat preservation, moisture resistance, etc. These materials are usually made of industrial waste residues, lightweight aggregates, etc. as the main raw materials using advanced production processes and technologies, and are made after special treatment. They not only have excellent physical and mechanical properties, but also have good environmental protection and construction performance. Its unique advantages occupy an important position in the construction industry and show broad development prospects. With the continuous advancement of construction technology and the improvement of people's requirements for living environment, the application scope of lightweight functional wall materials will continue to expand and promote the sustainable development of the construction industry.

[0004] However, there are currently few lightweight functional wall materials technologies based on titanium gypsum, and the output of titanium gypsum, an industrial by-product, is a huge resource, which has caused certain obstacles to the resource utilization of titanium gypsum. Therefore, we proposed a new composite material based on titanium gypsum to further improve the utilization value of titanium gypsum. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a method for preparing a lightweight functional wall material from a titanium gypsum composite material.

[0006] The technical solution of the present invention is: a method for preparing a lightweight functional wall material using a titanium gypsum composite material, comprising the following steps:

[0007] Step 1: Preparation of titanium II anhydrous gypsum

[0008] Titanium II anhydrous gypsum is prepared using titanium gypsum as raw material;

[0009] Step 2: Preparation of hydraulic titanium gypsum composite cementitious material

[0010] By weight, 30-50 parts of titanium II anhydrous gypsum, 20-30 parts of slag, 10-20 parts of fly ash, 5-10 parts of metakaolin, 1-3 parts of lime, and 1-5 parts of cement clinker are mixed uniformly in proportion to obtain a hydraulic titanium gypsum composite cementitious material;

[0011] Step 3: Prepare lightweight functional wall materials

[0012] By weight, 50-65 parts of hydraulic titanium gypsum composite cementitious material, 1-5 parts of polystyrene particles, 5-15 parts of vitrified microspheres, 0.01-0.03 parts of air entraining agent, 0.05-0.2 parts of cellulose water retaining agent, 0.1-0.2 parts of glue powder and 25-35 parts of water are uniformly mixed to obtain a lightweight functional wall material.

[0013] Furthermore, in step 1, the method for preparing titanium type II anhydrous gypsum using titanium gypsum as raw material is: washing, crushing and grinding the titanium gypsum to a particle size of 30-40 microns, and then calcining at 700-900° C. to prepare titanium type II anhydrous gypsum.

[0014] Description: Titanium II anhydrous gypsum has strong adaptability to the environment, and its softening coefficient is greater than 0.55. It can maintain good performance under various conditions such as dry-wet alternating environment, appropriate humid environment, low temperature environment, etc. This characteristic makes it adaptable to both the rainy areas in the south and the dry and cold areas in the north, and has a wide range of applicability; and II anhydrous gypsum-based plastering gypsum has higher bonding strength and later strength growth rate, which can eliminate the cracking and hollowing problems of cement mortar caused by shrinkage, and its physical properties and thermal insulation are excellent;

[0015] At the same time, using titanium gypsum as a raw material to prepare titanium type II anhydrous gypsum can make use of this Class I industrial solid waste, thereby effectively solving the problem of treating by-product precipitates during the production of titanium dioxide by the sulfuric acid method. The above-mentioned calcination method can effectively prepare titanium gypsum into titanium type II anhydrous gypsum.

[0016] Furthermore, during the grinding of the titanium gypsum, the crystal form regulating liquid is sprinkled and microwave radiation is used for 10 to 15 minutes. The amount of the crystal form regulating liquid sprinkled is X for every 100 g of titanium gypsum. 1 , the microwave radiation is X 2 , where X 1 =10~20, unit: mL / min; X 2 =0.35±0.05, unit: KWh.

[0017] Description: Microwave radiation is a high-frequency electromagnetic radiation with properties similar to light waves. It can penetrate materials and produce thermal effects. In the treatment of titanium gypsum, microwave radiation can be used to regulate the growth process of gypsum and accelerate the heating treatment effect of gypsum. In the process of preparing titanium II anhydrous gypsum, the titanium gypsum raw material containing water is placed in the microwave radiation field. By regulating the power and time of microwave radiation, the gypsum dehydration process can be precisely controlled, which can not only improve the preparation efficiency of titanium II anhydrous gypsum, but also improve its physical and chemical properties.

[0018] At the same time, by sprinkling an appropriate amount of crystal regulating liquid, the performance of titanium II anhydrous gypsum can be further enhanced during microwave radiation treatment, and the prepared lightweight functional wall material can have a higher usage strength. This not only effectively solves the problem of industrial by-products of titanium gypsum, but also improves its utilization value.

[0019] Furthermore, the amount of the crystal form regulating liquid sprayed is gradually reduced from the initial amount with the treatment time, and the rate of reduction is 1 mL / min every 1 to 3 minutes.

[0020] Note: The amount of the crystal form regulating liquid sprayed is gradually reduced with the treatment time. On the one hand, the amount of the crystal form regulating liquid added can be accurately controlled. On the other hand, it can avoid the excessive water content in the middle and late stages of the grinding system affecting the subsequent calcination treatment efficiency.

[0021] Furthermore, the microwave radiation amount X 2 Crystal form controlled liquid spraying amount X 1 The regulation changes satisfy the following formula:

[0022] m=X 2 , n = 10

[0023]

[0024] Among them, l max For X 1 = the maximum value 20 among 10 to 20, l min For X 1 =10, the minimum value among 10 to 20, n is X 1 = any integer between 10 and 20, m is the amount of crystal form control liquid sprayed X 1 Regulate the amount of microwave radiation after the change.

[0025] Note: The addition of crystal-forming control liquid will increase the water content of the grinding system to a certain extent. As a polar molecule, water will quickly absorb microwave energy and convert it into heat energy under microwave radiation. This energy conversion will cause the temperature inside the substance to rise rapidly, thus triggering a series of physical and chemical changes.

[0026] By regulating the corresponding microwave radiation amount according to the spraying amount of the crystal form regulating liquid and the above formula, the microwave radiation amount at the current spraying amount stage can be accurately regulated, thereby avoiding the internal temperature rise rate of the grinding system being too fast / slow due to microwave energy. By accurately controlling the microwave radiation amount, its physical and chemical properties can be significantly improved.

[0027] Moreover, according to experimental tests, the effect of the crystal-forming control liquid is significantly reduced when the usage rate is below 10 mL / min. This may be due to the significant reduction in the components contained in the crystal-forming control liquid in the system of hydrated titanium gypsum. At the same time, when the usage rate is above 20 mL / min, the increase in the components contained in the crystal-forming control liquid has no obvious effect on the performance of the prepared titanium II anhydrous gypsum, and will increase the water content of the wet grinding system and affect the treatment effect. Therefore, the sprinkling amount of the crystal-forming control liquid is limited to 10-20 mL / min.

[0028] Furthermore, the crystal form regulating liquid is a mixture of sodium polyphosphate, pentaerythritol, glycerol and deionized water in a mass ratio of 1 to 2:0.5 to 2:3:3.

[0029] Description: The above-mentioned crystal form regulator can adjust the rate and direction of crystal growth, thereby controlling the final morphology and crystal form of the crystal, and through interaction with the crystal surface, the crystal form regulator can change the structure of the crystal surface, thereby affecting the overall morphology and properties of the crystal, thereby enhancing the physical and chemical properties of titanium II anhydrous gypsum.

[0030] Furthermore, the volume density of the lightweight functional wall material is 500-900 kg / m3, and the lightweight functional wall material is a block or a strip board.

[0031] Description: The composite material prepared by titanium gypsum is used as a wall material with the characteristics of light weight and high strength. It can be widely used in the construction industry by preparing it into blocks or strips. The specifications and dimensions of the blocks or strips are not limited to the present invention. Blocks or strips of corresponding specifications and dimensions are prepared according to actual needs.

[0032] The beneficial effects of the present invention are:

[0033] (1) The method for preparing a lightweight functional wall material based on a titanium gypsum composite material of the present invention can make full use of titanium gypsum to prepare a lightweight functional wall material with better performance, which is energy-saving and environmentally friendly, and can effectively improve the utilization value of titanium gypsum, providing a new choice for materials used in the construction industry.

[0034] (2) The present invention prepares titanium type II anhydrous gypsum by using titanium gypsum as raw material, and on this basis, uses crystal type regulating liquid and microwave radiation to treat the titanium type II anhydrous gypsum, which can further enhance the performance of titanium type II anhydrous gypsum, thereby making the prepared lightweight functional wall material have higher usage strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flow chart of a method for preparing lightweight functional wall materials using titanium gypsum composite materials. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with specific implementation methods to better reflect the advantages of the present invention.

[0037] Embodiment 1: A method for preparing a lightweight functional wall material from a titanium gypsum composite material, comprising the following steps:

[0038] Step 1: Preparation of titanium II anhydrous gypsum

[0039] The method for preparing titanium II anhydrous gypsum using titanium gypsum as a raw material is as follows: washing, crushing and grinding the titanium gypsum to a particle size of 30-40 microns, and then calcining at 870° C. to prepare titanium II anhydrous gypsum;

[0040] Step 2: Preparation of hydraulic titanium gypsum composite cementitious material

[0041] By weight, 45 parts of titanium II anhydrous gypsum, 26 parts of slag, 17 parts of fly ash, 8 parts of metakaolin, 2 parts of lime, and 4 parts of cement clinker are mixed uniformly in proportion to obtain a hydraulic titanium gypsum composite cementitious material;

[0042] Step 3: Prepare lightweight functional wall materials

[0043] Measured by mass, 58 parts of hydraulic titanium gypsum composite cementitious material, 4 parts of polystyrene particles, 12 parts of glass microspheres, 0.02 parts of air entraining agent, 0.12 parts of cellulose water-retaining agent, 0.15 parts of glue powder and 33 parts of water are evenly mixed to obtain a lightweight functional wall material. The volume density of the lightweight functional wall material is 800 kg / m3, and the lightweight functional wall material is a block or a strip board.

[0044] The composition of the cement clinker is as follows: 66wt% CaO, 24wt% SiO 2 , 6wt%Al 2 O 3 , 4wt%Fe 2 O 3The slag comprises 42wt% calcium oxide, 36wt% silicon dioxide, 10wt% aluminum oxide, 7wt% magnesium oxide, 4.8wt% iron oxide, and other trace impurities; the fly ash comprises 45wt% silicon oxide, 32wt% aluminum oxide, 11wt% iron oxide, and the remainder is calcium oxide; the air entraining agent is sodium alkylbenzene sulfonate; the cellulose water-retaining agent is hydroxypropyl methylcellulose.

[0045] Example 2: This example is different from Example 1 in that in step 1, titanium II anhydrous gypsum is prepared by calcining at 700°C.

[0046] Example 3: This example is different from Example 1 in that in step 1, titanium II anhydrous gypsum is prepared by calcining at 900°C.

[0047] Example 4: The difference between this example and Example 1 lies in step 2. By weight, 30 parts of titanium II anhydrous gypsum are mixed evenly in proportion with 20 parts of slag, 10 parts of fly ash, 5 parts of kaolin, 1 part of lime and 1 part of cement clinker to obtain a hydraulic titanium gypsum composite cementitious material.

[0048] Example 5: The difference between this example and Example 1 lies in step 2. By weight, 50 parts of titanium II anhydrous gypsum are mixed evenly in proportion with 30 parts of slag, 20 parts of fly ash, 10 parts of kaolin, 3 parts of lime and 5 parts of cement clinker to obtain a hydraulic titanium gypsum composite cementitious material.

[0049] Example 6: The difference between this example and Example 1 lies in step 3. In parts by mass, 50 parts of hydraulic titanium gypsum composite cementitious material are mixed evenly with 1 part of polystyrene particles, 5 parts of glass microspheres, 0.01 parts of air entraining agent, 0.05 parts of cellulose water-retaining agent, 0.1 parts of glue powder and 25 parts of water to obtain a lightweight functional wall material.

[0050] Example 7: The difference between this example and Example 1 lies in step 3. In parts by mass, 65 parts of hydraulic titanium gypsum composite cementitious material are mixed evenly with 5 parts of polystyrene particles, 15 parts of glass microspheres, 0.03 parts of air entraining agent, 0.2 parts of cellulose water-retaining agent, 0.2 parts of glue powder and 35 parts of water to obtain a lightweight functional wall material.

[0051] Example 8: This example is different from Example 1 in that the titanium II anhydrous gypsum is prepared. During the grinding of the titanium gypsum, the crystal type regulating liquid is sprinkled and microwave radiation is used for 12 minutes. The amount of crystal type regulating liquid sprinkled is X for every 100g of titanium gypsum. 1 , the microwave radiation is X 2 , where X 1 =17, unit: mL / min; X2 =0.35, unit: KWh; the crystal form regulating liquid is a mixture of sodium polyphosphate, pentaerythritol, glycerol and deionized water in a mass ratio of 1.5:1.2:3:3.

[0052] Example 9: This example is different from Example 8 in that the crystal form regulating liquid is sprayed at a rate of 10 mL / min and microwave radiation is used for 10 min.

[0053] Example 10: This example is different from Example 8 in that 20 mL / min of the crystal form regulating liquid is sprayed and microwave radiation is used for 15 min.

[0054] Example 11: This example is different from Example 8 in that the crystal form regulating liquid is a mixture of sodium polyphosphate, pentaerythritol, glycerol, and deionized water in a mass ratio of 1:0.5:3:3.

[0055] Example 12: This example is different from Example 8 in that the crystal form regulating liquid is a mixture of sodium polyphosphate, pentaerythritol, glycerol, and deionized water in a mass ratio of 2:2:3:3.

[0056] Example 13: This example is different from Example 8 in that the amount of the crystal form regulating liquid sprayed is gradually reduced from the initial spraying amount with the treatment time, and the rate of reduction is 1 mL / min for every 1 min of crystal form regulating liquid spraying, and the microwave radiation amount X 2 Crystal form controlled liquid spraying amount X 1 The regulation changes satisfy the following formula:

[0057] m=X 2 , n = 10 (1)

[0058]

[0059] Among them, l max For X 1 = the maximum value 20 among 10 to 20, l min For X 1 =10, the minimum value among 10 to 20, n is X 1 = any integer between 10 and 20, m is the amount of crystal form control liquid sprayed X 1 Regulate the amount of microwave radiation after the change;

[0060] Where n = X 1 =17, calculated using the above formula (2), m is 0.817KWh.

[0061] Example 14: This example is different from Example 9 in that the amount of the crystal form regulating liquid sprayed is gradually reduced from the initial spraying amount with the treatment time, and the rate of reduction is 1 mL / min for every 1 min of crystal form regulating liquid spraying, and the microwave radiation amount X 2 Crystal form controlled liquid spraying amount X 1 The regulation changes satisfy the following formula:

[0062] m=X 2 , n = 10 (1)

[0063]

[0064] Among them, l max For X 1 = the maximum value 20 among 10 to 20, l min For X 1 =10, the minimum value among 10 to 20, n is X 1 = any integer between 10 and 20, m is the amount of crystal form control liquid sprayed X 1 Regulate the amount of microwave radiation after the change;

[0065] Where n = X 1 =10, calculated using the above formula (1), m is 0.35 KWh, which is the same as in Example 8.

[0066] Example 15: This example is different from Example 10 in that the amount of the crystal form regulating liquid sprayed is gradually reduced from the initial spraying amount with the treatment time, and the rate of reduction is 1 mL / min every 3 min, and the microwave radiation amount X 2 Crystal form controlled liquid spraying amount X 1 The regulation changes satisfy the following formula:

[0067] m=X 2 , n = 10 (1)

[0068]

[0069] Among them, l max For X 1 = the maximum value 20 among 10 to 20, l min For X 1 =10, the minimum value among 10 to 20, n is X 1 = any integer between 10 and 20, m is the amount of crystal form control liquid sprayed X 1 Regulate the amount of microwave radiation after the change.

[0070] Where n = X 1 =20, calculated using the above formula (2), m is 0.175KWh.

[0071] Application experiment example:

[0072] 1. Selection of raw materials

[0073] Titanium gypsum from a factory in this city is selected as the raw material; the air entraining agent is sodium alkylbenzene sulfonate; the cellulose water retaining agent is hydroxypropyl methylcellulose; metakaolin, lime, polystyrene particles, vitrified microspheres, and rubber powder are all purchased from commercial products;

[0074] Among them, the proportion of each component of cement clinker is shown in Table 1:

[0075] Table 1 Proportion of each component of cement clinker

[0076] Material CaO <![CDATA[SiO 2 ]]> <![CDATA[Al 2 THE 3 ]]> <![CDATA[Fe 2 THE 3 ]]> Cement clinker 66wt% 24wt% 6wt% 4wt%

[0077] The proportion of each component of slag is shown in Table 2:

[0078] Table 2 Proportion of each component of slag

[0079] Material CaO <![CDATA[SiO 2 ]]> <![CDATA[Al 2 THE 3 ]]> MgO <![CDATA[Fe 2 THE 3 ]]> slag 42wt% 36wt% 10wt% 7wt% 4.8wt%

[0080] The proportion of each component of fly ash is shown in Table 3:

[0081] Table 3 Proportion of each component of fly ash

[0082] Material <![CDATA[SiO 2 ]]> <![CDATA[Al 2 THE 3 ]]> <![CDATA[Fe 2 THE 3 ]]> CaO Fly ash 45wt% 32wt% 11wt% margin

[0083] 2. Characterization of Titanium Gypsum Performance

[0084] Take three equal groups of titanium gypsum from a certain factory in this city, each with a mass of m = 200g, and put them into an electric constant temperature blast drying oven. Adjust the temperature in the drying oven to 80℃ and dry to constant weight. Measure the weight of the remaining titanium gypsum m 0 , the calculation formula of moisture content w is as follows:

[0085]

[0086] Among them, w is the moisture content, m 0 is the average mass of titanium gypsum when dried to constant weight (g), and m is the mass of undried titanium gypsum;

[0087] It is calculated that the w of titanium gypsum produced by a factory in this city is 35%, while in Examples 8 to 15 of this product, the w of titanium gypsum needs to be controlled at 25-30%. Therefore, in actual operation, the titanium gypsum is properly dried to keep its moisture content within this range.

[0088] 3. Experimental Sample Preparation

[0089] The lightweight functional wall materials prepared in the above embodiments were respectively poured into a 40 mm × 40 mm × 160 mm triple mold for molding, and demolded 48 hours after molding. The demolded samples were sealed with plastic film and placed in a curing room at 20°C for curing for 28 days, and then the performance was tested.

[0090] 4. Performance Testing Methods

[0091] The compressive strength of the above samples at 28 days was tested using an AEC-201 automatic cement strength testing machine with a loading speed of 2.4 KN / s. Three groups of samples of each embodiment were measured and the average value was calculated. If the difference between the three measured compressive strength values ​​and their average value was not greater than 15% of the average value, the average value was used as the compressive strength value of the sample; if one value differed from the average value by more than 15%, the value should be discarded and the average value should be calculated with the remaining two values; if more than one value differed from the average value by more than 15%, the test was repeated with three pieces.

[0092] V. Experimental Results

[0093] A commercially available lightweight wall material (volume density 800 kg / m3) was used as a control example to test the compressive strength of the lightweight functional wall materials prepared in each embodiment. The test results are shown in Table 4 below:

[0094] Table 4 Statistics of 28d compressive strength of lightweight functional wall materials

[0095] Group Compressive strength / MPa Group Compressive strength / MPa Example 1 10.21 Example 9 11.17 Example 2 10.17 Example 10 11.54 Example 3 10.30 Embodiment 11 11.79 Example 4 9.27 Example 12 12.13 Example 5 9.83 Embodiment 13 13.59 Example 6 9.61 Embodiment 14 11.21 Example 7 9.49 Embodiment 15 12.98 Example 8 12.63 Comparison Example 8.79

[0096] It can be seen from the results in Table 4 above that, by comparing Example 1 with the control example, it can be seen that the lightweight functional wall material prepared by the method of the present invention has better compressive strength, and can recycle titanium gypsum, which not only solves the problem of processing factory by-products, but also provides a new type of building material for the field of building materials, and the following exploration and analysis are carried out:

[0097] 1) The influence of different calcination temperatures of titanium II anhydrous gypsum on its use effect

[0098] By comparing Example 2 and Example 3 with Example 1, it can be seen that the compressive strength within ±0.1MPa is considered to be a sample deviation. Therefore, the different calcination temperatures in this range have little effect on the prepared lightweight functional wall materials. The corresponding selection can be made according to the actual production situation. The range of 850°C-900°C is preferred, which can efficiently obtain the raw materials (titanium II type anhydrous gypsum) of lightweight functional wall materials.

[0099] 2) Effect of different combinations of hydraulic titanium gypsum composite cementitious materials on the use effect

[0100] By comparing Example 4 and Example 5 with Example 1, it can be seen that the use of different proportions of components to prepare the hydraulic titanium gypsum composite cementitious material has a certain influence on the compressive strength of the subsequently obtained lightweight functional wall material. After adjusting the components on the basis of Example 1, the compressive strength of the lightweight functional wall material decreased. Therefore, the hydraulic titanium gypsum composite cementitious material of Example 1 has the best performance.

[0101] 3) The impact of different lightweight functional wall materials on the use effect

[0102] By comparing Example 6 and Example 7 with Example 1, it can be seen that the compressive strength of the lightweight functional wall materials prepared by using different proportions of the components is significantly different. After adjusting the components on the basis of Example 1, the compressive strength of the lightweight functional wall materials decreased. Therefore, the lightweight functional wall materials of Example 1 have the best performance.

[0103] 4) Effect of different titanium II anhydrous gypsum on the use effect

[0104] By comparing Example 8 with Example 1, it can be seen that the use of a crystal type regulating liquid and microwave radiation during the grinding of titanium gypsum can effectively enhance the performance of titanium II anhydrous gypsum. After using the titanium II anhydrous gypsum of Example 8, the lightweight functional wall material is increased from the original 10.21MPa to 12.63MPa.

[0105] 5) Effect of different treatment time and amount of crystal form control liquid on the use effect

[0106] By comparing Example 9 and Example 10 with Example 8, it can be seen that under different treatment times and crystal form regulating liquid spraying amounts, the use performance of the titanium II anhydrous gypsum prepared therefrom is different. On the basis of Example 8, the spraying amount of the crystal form regulating liquid is reduced and the treatment time is shortened, and the use performance of the titanium II anhydrous gypsum prepared therefrom decreases. This may be due to the fact that the addition of each component of the crystal form regulating liquid is less and the microwave radiation treatment is insufficient, and the physical and chemical properties of the titanium gypsum are not fully enhanced, which affects the use performance of the prepared titanium II anhydrous gypsum; and on the basis of Example 8, the spraying amount of the crystal form regulating liquid is increased and the treatment time is extended, and the use performance of the titanium II anhydrous gypsum prepared therefrom also decreases. This may be due to the excessive addition of water in the crystal form regulating liquid, which makes the water content of the wet grinding system too high, and affects the enhancement of the physical and chemical properties of the titanium gypsum. Therefore, the treatment parameters of Example 8 are relatively optimal;

[0107] 6) The influence of different combinations of crystal-form regulating liquid on the use effect

[0108] By comparing Example 11 and Example 12 with Example 8, it can be seen that the use of different proportions of the components for the preparation of the crystal form regulating liquid has a certain influence on the use performance of the prepared titanium II anhydrous gypsum. After the components are adjusted on the basis of Example 8, the compressive strength of the lightweight functional wall material decreases. Therefore, the use performance of the crystal form regulating liquid of Example 8 is relatively optimal.

[0109] 7) The influence of different microwave radiation control methods on the use effect

[0110] By comparing Example 13 with Example 8, Example 14 with Example 9, and Example 15 with Example 10, it can be seen that Example 14 is the same as Example 9 and the compressive strength is within ±0.1 MPa. Therefore, the treatment effect of the above method is analyzed by comparing Example 13 with Example 8 and Example 15 with Example 10.

[0111] By regulating the microwave radiation amount at each stage of Example 13 and Example 15 according to the spraying amount of the crystal form regulating liquid and the above formula, the microwave radiation amount at the current spraying amount stage can be accurately regulated, thereby avoiding the internal heating rate of the grinding system being too fast / slow due to microwave energy. By observing Example 13 and Example 15, it is found that the physical and chemical properties can be significantly improved after the precise control of the microwave radiation amount. Among them, after using the method of Example 13, the compressive strength is increased from the original 12.63MPa to 13.59MPa, and after using the method of Example 15, the compressive strength is increased from the original 11.54MPa to 12.98MPa.

[0112] Therefore, the physical and chemical properties of titanium II anhydrous gypsum can be significantly improved by regulating the corresponding microwave radiation amount according to the spraying amount of the crystal form regulating liquid and the above formula.

Claims

1. A method for preparing a lightweight functional wall material from a titanium gypsum composite material, characterized in that: The following steps are involved: Step 1: Preparation of titanium II anhydrous gypsum Titanium II anhydrous gypsum is prepared using titanium gypsum as raw material; Step 2: Preparation of hydraulic titanium gypsum composite cementitious material By weight, 30-50 parts of titanium II anhydrous gypsum, 20-30 parts of slag, 10-20 parts of fly ash, 5-10 parts of metakaolin, 1-3 parts of lime, and 1-5 parts of cement clinker are mixed uniformly in proportion to obtain a hydraulic titanium gypsum composite cementitious material; Step 3: Prepare lightweight functional wall materials By weight, 50-65 parts of hydraulic titanium gypsum composite cementitious material, 1-5 parts of polystyrene particles, 5-15 parts of vitrified microspheres, 0.01-0.03 parts of air entraining agent, 0.05-0.2 parts of cellulose water retaining agent, 0.1-0.2 parts of glue powder and 25-35 parts of water are uniformly mixed to obtain a lightweight functional wall material.

2. The method for preparing a lightweight functional wall material from a titanium gypsum composite material according to claim 1, characterized in that: In step 1, the method for preparing titanium II anhydrous gypsum using titanium gypsum as raw material is as follows: washing, crushing and grinding the titanium gypsum to a particle size of 30-40 microns, and then calcining at 700-900° C. to prepare titanium II anhydrous gypsum.

3. The method for preparing a lightweight functional wall material from a titanium gypsum composite material according to claim 2, characterized in that: During the grinding of the titanium gypsum, the crystal regulating liquid is sprinkled and microwave radiation is used for 10 to 15 minutes. For every 100g of titanium gypsum, the amount of crystal regulating liquid sprinkled is X1, and the amount of microwave radiation is X2, wherein X1=10 to 20, unit: mL / min; X2=0.35±0.05, unit: KWh.

4. The method for preparing a lightweight functional wall material from a titanium gypsum composite material according to claim 3, characterized in that: The amount of the crystal form regulating liquid sprayed is gradually reduced from the initial amount as the treatment time progresses, and the rate of reduction is 1 mL / min for every 1 to 3 minutes.

5. The method for preparing a lightweight functional wall material from a titanium gypsum composite material according to claim 4, characterized in that: The microwave radiation amount X2 is regulated by the crystal form regulating liquid spraying amount X1, and satisfies the following formula: m=X2,n=10 Among them, l max is the maximum value 20 among X1=10~20, l min is the minimum value 10 among X1=10-20, n is any integer among X1=10-20, and m is the microwave radiation amount after being regulated by the crystal form regulating liquid spraying amount X1.

6. The method for preparing a lightweight functional wall material from a titanium gypsum composite material according to claim 3, characterized in that: The crystal form regulating liquid is sprayed at a rate of 10 to 20 mL / min per 100 g of titanium gypsum. The crystal form regulating liquid is a mixture of sodium polyphosphate, pentaerythritol, glycerol and deionized water in a mass ratio of 1 to 2:0.5 to 2:3:

3.

7. The method for preparing a lightweight functional wall material from a titanium gypsum composite material according to claim 1, characterized in that: The volume density of the lightweight functional wall material is 500-900 kg / m3, and the lightweight functional wall material is a block or a strip board.

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