Industrial solid waste filler method and its application

Abstract

The invention discloses a method and application of an industrial solid waste filler, wherein the industrial solid waste is pretreated to obtain industrial solid waste powder; the industrial solid waste powder is then mixed with deionized water to obtain a water slurry mixture; the solid matter in the water slurry mixture is separated and dried to obtain a solid material; the solid material is then roasted, and the solid product after cooling is ground into powder; the powder is then mixed with silicate cement, and the mixed powder, deionized water and hydrogen peroxide are then mixed, foamed at room temperature and naturally air-dried at room temperature, thereby obtaining an industrial solid waste filler material. The invention combines cement with such a solid waste filler to obtain foamed concrete with an adsorption effect, effectively combining the adsorption effect with the characteristics of concrete, showing a good adsorption effect of phosphorus removal and antimony removal, and having low cost, achieving the purpose of treating waste with waste, and having important industrial value.

Description

Technical Field

[0001] The invention relates to an adsorbent for treating wastewater and application thereof, in particular to an adsorbent for treating wastewater containing antimony and phosphorus and application thereof, and is applied to the technical fields of solid waste utilization and wastewater treatment. Background Art

[0002] Eutrophication of water bodies is mainly caused by sewage generated by human activities, which leads to excessive nitrogen and phosphorus content in the water, causing the accelerated reproduction of plankton in the water, making the production rate of organic matter in the water greater than the consumption rate, damaging the water quality, and causing the death of other organisms in the water. Phosphorus is the main substance that causes eutrophication of water bodies. When the phosphorus content in the water is greater than 0.018 mg / L, it will cause a substantial increase in plankton. However, when the phosphorus content in the water is lower than 0.1 mg / L, the biomass of phytoplankton is directly proportional to the phosphorus content. Therefore, controlling the phosphorus content in the water is the top priority in preventing eutrophication of water bodies.

[0003] Common phosphorus removal methods include chemical precipitation, artificial wetland, biological method, ion exchange, membrane separation and adsorption. Chemical precipitation is to form insoluble precipitates with phosphorus by adding precipitants, but the long-term operation of chemical precipitation will also cause the pH of the water to rise and sludge to be produced. The biological method uses microorganisms to absorb phosphorus under aerobic conditions and release phosphorus under special anaerobic conditions. The biological method has a good phosphorus removal effect, but the biological method has harsh conditions and high costs. The ion exchange method is a method of replacing phosphate anions on the exchange agent, which has a good effect but a high cost. The membrane separation method has a high phosphorus removal efficiency, but its application is also limited due to its high cost. In the adsorption method, it is key to find an adsorbent that is low-cost, easy to make and can efficiently remove pollutants.

[0004] Antimony compounds can interfere with the activity of enzymes in the human body, thereby causing metabolic disorders and damage to the nervous system. Antimony pollution mainly exists in soil and water pollution caused by mineral processing, metallurgy, leather printing and other enterprises. Commonly used antimony removal methods include oxidation-reduction method, chemical precipitation method, solution extraction method and adsorption method, etc. Compared with the adsorption method, other methods have the disadvantages of high cost and secondary pollution if improperly handled. Therefore, the application of adsorbents with low preparation cost and high adsorption efficiency is of great practical significance for wastewater treatment.

[0005] Conventional adsorbents such as activated alumina and diatomaceous earth are expensive, and the cost of treating phosphorus-containing wastewater is too high. Therefore, developing a low-cost, high-adsorption efficiency adsorbent has become a technical problem that needs to be solved urgently. Summary of the invention

[0006] In order to solve the problems of the prior art, the purpose of the present invention is to overcome the shortcomings of the prior art and provide a method and application of industrial solid waste filler, which can prepare resource-saving, environmentally friendly and low-cost industrial solid waste filler. Since conventional adsorbents such as activated alumina and diatomaceous earth are expensive, the cost of treating phosphorus-containing wastewater is too high. Therefore, the present invention uses natural materials and solid waste to synthesize an adsorbent that can absorb and remove phosphorus and antimony, which has important practical significance and demonstration effect for solid waste resource utilization, clean production and energy conservation and emission reduction.

[0007] In order to achieve the above invention purpose, the present invention adopts the following technical solution:

[0008] A method for industrial solid waste filler, comprising the following steps:

[0009] a. Pretreatment of industrial solid waste: using industrial solid waste, according to the mass ratio of components, the mass ratio of industrial solid waste meets the requirement of calcium and iron mass ratio of (55-80): (45-20), and then drying, grinding and screening the industrial solid waste to obtain industrial solid waste powder;

[0010] b. The industrial solid waste powder obtained in step a and deionized water were mixed and stirred, and the pH was adjusted to 9-11 to obtain a slurry mixture;

[0011] c. separating the solids in the slurry mixture obtained in step b, forming the collected fixed material, and drying it, controlling the drying temperature to be no higher than 80° C. to obtain a solid material;

[0012] d. The solid material obtained in step c is calcined at 800 to 1000°C for 3 to 4 hours, cooled naturally, and then the calcined product is cooled and ground into a powder;

[0013] e. The powder obtained in step d is mixed with silicate cement, and the mixed powder, deionized water and hydrogen peroxide are placed in a concrete mold for mixing, foamed at room temperature and naturally air-dried at room temperature, thereby preparing an industrial solid waste filler material.

[0014] As a preferred technical solution of the present invention, in step a, the industrial solid waste is any one of dolomite, calcite, gypsum, blast furnace slag, steel slag, red mud, fly ash, OG mud or any mixture of any two or more thereof, wherein the OG mud is solid waste generated by a wet OG dust removal process in a steelmaking converter to reduce particulate matter in smoke.

[0015] As a preferred technical solution of the present invention, in step a, the industrial solid waste is placed in a drying oven at 105-110°C for at least 4 hours to obtain dried industrial solid waste, which is then ground and screened to obtain industrial solid waste powder.

[0016] As a preferred technical solution of the present invention, in step b, the mass ratio of solid waste powder to water is (1.3-4): (0.6-1.8).

[0017] As a preferred technical solution of the present invention, in step b, a mixture of industrial solid waste powder and deionized water is added to a ball mill, covered and placed in a ball mill for ball milling mixing for at least 30 minutes, with a ball milling mixing speed of not less than 200 r / min, to obtain a water slurry mixture.

[0018] As a preferred technical solution of the present invention, in step c, after the ball mill stops running, the water slurry mixture is placed in a centrifuge for centrifugal treatment for at least 5 minutes, and the centrifuge speed is not less than 3000r / min. After the centrifugation is completed, the upper clear liquid is removed, and the remaining fixed material is placed in a drying box for drying for at least 12 hours to obtain a solid material.

[0019] As a preferred technical solution of the present invention, in the step d, the solid material is ground into powder and made into columnar particles using a granulator. The columnar particles are loaded into a ceramic crucible, covered and placed in a muffle furnace for roasting. The heating rate is not less than 5°C / min. After roasting for 3 to 4 hours, it is naturally cooled and the prepared columnar particles are ground into powder.

[0020] As a preferred technical solution of the present invention, in the step e, the powder obtained in step d is mixed with silicate cement in a mass ratio of 2:5 by ball milling for at least 12 hours, and the rotation speed of the ball milling mixing is not less than 200 r / min to obtain a mixed powder; the obtained mixed powder, deionized water and 30wt.% hydrogen peroxide are mixed in a mass ratio of 20:9:1, and the mixture is placed in a concrete mold for mixing; the mold is covered with plastic wrap, foamed at room temperature, and naturally air-dried at room temperature for at least 4 days, thereby obtaining an industrial solid waste filler material.

[0021] An application of an industrial solid waste filler prepared by the method of the present invention, cement, industrial solid waste filler, water and foaming agent are uniformly mixed according to the mass ratio of (15-50): (20-45): (10-30): (3-5), and porous concrete adsorption particles are obtained by pouring and curing, which are used as concrete composite adsorption materials for adsorbing and removing antimony and phosphorus.

[0022] As a preferred technical solution of the present invention, when treating antimony-phosphorus-containing wastewater, 1 g of porous concrete adsorption particles is added to 1 L of wastewater to be treated with a total phosphorus concentration of not less than 2 mg / L and an antimony concentration of not less than 5 mg / L to adsorb and remove antimony-phosphorus.

[0023] Compared with the prior art, the present invention has the following obvious outstanding substantive features and significant advantages:

[0024] 1. The present invention uses solid waste containing high calcium and iron content as raw materials to prepare solid waste filling materials, achieving the purpose of treating waste with waste, and has low preparation cost and good environmental and economic benefits;

[0025] 2. The present invention mixes industrial solid waste fillers with cement to prepare porous concrete composite adsorption materials for adsorbing and removing antimony and phosphorus, which can be used as a solid inorganic adsorbent with a large volume, reducing the difficulty of solid-liquid separation after adsorption, thereby improving the practical value of the adsorbent;

[0026] 3. The method of the present invention is simple, easy to implement, low in cost, and suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Electron microscope image of the composite foamed concrete of Example 1 of the present invention.

[0028] Figure 2 The phosphorus removal effect of the composite foamed concrete of Examples 1, 4 and 5 of the present invention is shown by adsorption.

[0029] Figure 3 The antimony removal effect of the composite foamed concrete of Examples 1, 4 and 5 of the present invention is improved. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the examples described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0031] The above scheme is further described below in conjunction with specific implementation examples. The preferred embodiments of the present invention are described in detail as follows:

[0032] Example 1

[0033] In this embodiment, see Figure 1 , a method for industrial solid waste filler, comprising the steps of:

[0034] a. Pretreatment of industrial solid waste: using industrial solid waste dolomite washed mud and OG mud, placing the dolomite washed mud and OG mud in a drying oven at 105-110°C for 4 hours to obtain dried dolomite washed mud and OG mud, grinding and screening to obtain industrial solid waste powder;

[0035] b. Add the mixture of industrial solid waste powder and deionized water into a ball mill, mix dolomite washed mud, OG mud and deionized water in a mass ratio of 1:0.3:0.6, cover and put into a ball mill for ball milling for 30 minutes, the ball milling speed is 200r / min, and the pH is adjusted to 9-11 to obtain a slurry mixture;

[0036] c. After the ball mill stops running, the water slurry mixture obtained in step b is placed in a centrifuge for centrifugation for 5 minutes at a speed of 3000 r / min. After the centrifugation is completed, the supernatant is removed, and the remaining fixed material is formed and placed in a drying oven at 80°C for 12 hours to obtain a solid material;

[0037] d. The solid material obtained in step c is ground into powder and made into columnar particles using a granulator. The columnar particles are loaded into a ceramic crucible, covered and placed in a muffle furnace for calcination at a heating rate of 5 ° C / min. After calcination at 800 ° C for 4h, the columnar particles are naturally cooled and ground into powder;

[0038] e. The powder obtained in step d is mixed with silicate cement in a mass ratio of 2:5 by ball milling for 12 hours at a speed of 200 r / min to obtain a mixed powder; the obtained mixed powder, deionized water and 30 wt.% hydrogen peroxide are placed in a concrete mold in a mass ratio of 20:9:1 for mixing; the mold is covered with plastic wrap, foamed at room temperature, and naturally air-dried at room temperature for 4 days to obtain an industrial solid waste filler material.

[0039] In this embodiment, an industrial solid waste filler prepared by the method of the industrial solid waste filler of this embodiment is used, cement, industrial solid waste filler, water and foaming agent are mixed evenly according to the mass ratio of 30:15:15:4, poured and cured to obtain porous concrete adsorption particles, which are used as concrete composite adsorption materials for adsorbing and removing antimony and phosphorus. When the porous concrete adsorption particles prepared in this embodiment are used to treat antimony-phosphorus-containing wastewater, 1g of the porous concrete adsorption particles is added to 1L of wastewater to be treated with a total phosphorus concentration of 2mg / L and an antimony concentration of 5mg / L, and antimony and phosphorus are adsorbed and removed.

[0040] Experimental test analysis:

[0041] Figure 1This is an electron microscope picture of the composite foamed concrete of this embodiment. Figure 1 It can be seen that the composite foamed concrete of this embodiment has a rich mesoporous structure and has very good interface conditions.

[0042] In addition, 1000 ml of simulated wastewater (2 mg / L TP) was prepared and placed in a 1 L beaker, and 0.1, 0.3, 0.5, and 1 g of the adsorbent material prepared in this example were added respectively, and placed in a water bath thermostatic agitator, and stirred at 25° C. for 40 min. A portion of the adsorbed solution was taken out and transferred to a 30 ml centrifuge tube, and centrifuged at a centrifuge speed of 3000 r / min for 5 min, and the supernatant was taken. The total phosphorus content in the water was determined by ammonium molybdate spectrophotometry (GB 11893-89).

[0043] In addition, 1000 ml of simulated wastewater (5 mg / L Sb) was placed in a 1 L beaker, and 0.1, 0.3, 0.5, and 1 g of the adsorbent material prepared in this example were added respectively, and placed in a water bath thermostatic stirrer, and stirred at 25° C. for 40 min. A portion of the adsorbed solution was taken out and transferred to a 30 ml centrifuge tube, and centrifuged at a speed of 3000 r / min for 5 min, and the supernatant was taken. The antimony content in the water was tested using an inductively coupled plasma spectrometer (ICP). See Figure 2 and Figure 3 It can be seen that the composite foamed concrete of this embodiment has an adsorption effect for removing phosphorus and antimony.

[0044] Embodiment 2:

[0045] This embodiment is basically the same as the first embodiment, except that:

[0046] In this embodiment, a method for industrial solid waste filler includes the following steps:

[0047] a. Pretreatment of industrial solid waste: using industrial solid waste calcite and slag, placing the calcite and slag in a drying oven at 105-110°C for 4 hours to obtain dry calcite and slag, grinding and screening to obtain industrial solid waste powder;

[0048] b. Add the mixture of industrial solid waste powder and deionized water into a ball mill, mix calcite, slag and deionized water in a mass ratio of 1:1:1.4, cover and put into a ball mill for ball milling for 30 minutes, the ball milling speed is 200r / min, and the pH is adjusted to 9-11 to obtain a water slurry mixture;

[0049] c. After the ball mill stops running, the water slurry mixture obtained in step b is placed in a centrifuge for centrifugation for 5 minutes at a speed of 3000 r / min. After the centrifugation is completed, the supernatant is removed, and the remaining fixed material is formed and placed in a drying oven at 80°C for 12 hours to obtain a solid material;

[0050] d. The solid material obtained in step c is ground into powder and made into columnar particles using a granulator. The columnar particles are loaded into a ceramic crucible, covered and placed in a muffle furnace for calcination at a heating rate of 5 ° C / min. After calcination at 800 ° C for 4h, the columnar particles are naturally cooled and ground into powder;

[0051] e. The powder obtained in step d is mixed with silicate cement in a mass ratio of 2:5 by ball milling for 12 hours at a speed of 200 r / min to obtain a mixed powder; the obtained mixed powder, deionized water and 30 wt.% hydrogen peroxide are placed in a concrete mold in a mass ratio of 20:9:1 for mixing; the mold is covered with plastic wrap, foamed at room temperature, and naturally air-dried at room temperature for 4 days to obtain an industrial solid waste filler material.

[0052] In this embodiment, an industrial solid waste filler prepared by the method of the industrial solid waste filler of this embodiment is used, and cement, industrial solid waste filler, water and foaming agent are mixed evenly according to the mass ratio of 30:20:15:3, and poured and cured to obtain porous concrete adsorption particles, which are used as concrete composite adsorption materials for adsorbing and removing antimony and phosphorus. When the porous concrete adsorption particles prepared in this embodiment are used to treat antimony-phosphorus-containing wastewater, 1g of the porous concrete adsorption particles is added to 1L of wastewater to be treated with a total phosphorus concentration of 2mg / L and an antimony concentration of 5mg / L, and antimony and phosphorus are adsorbed and removed.

[0053] Experimental test analysis:

[0054] The solid waste used in this example is calcite, slag and deionized water, which are mixed in a ratio of 1:1:1.4. The total phosphorus removal rate and antimony removal effect of the composite foamed concrete adsorbent prepared in this example are measured using the same test method as in Example 1. Figure 2 and Figure 3 It can be seen that the composite foamed concrete of this embodiment has an adsorption effect for removing phosphorus and antimony.

[0055] Embodiment 3:

[0056] This embodiment is basically the same as the above embodiment, with the following features:

[0057] In this embodiment, a method for industrial solid waste filler includes the following steps:

[0058] a. Pretreatment of industrial solid waste: using industrial solid waste gypsum and red mud, the gypsum and red mud are placed in a drying oven at 105-110°C for 4 hours to obtain dried gypsum and red mud, which are then ground and screened to obtain industrial solid waste powder;

[0059] b. Add the mixture of industrial solid waste powder and deionized water into a ball mill, mix gypsum, red mud and deionized water in a mass ratio of 1:2:1.7, cover and put into a ball mill for ball milling for 30 minutes, the ball milling speed is 200r / min, and the pH is adjusted to 9-11 to obtain a slurry mixture;

[0060] c. After the ball mill stops running, the water slurry mixture obtained in step b is placed in a centrifuge for centrifugation for 5 minutes at a speed of 3000 r / min. After the centrifugation is completed, the supernatant is removed, and the remaining fixed material is formed and placed in a drying oven at 80°C for 12 hours to obtain a solid material;

[0061] d. The solid material obtained in step c is ground into powder and made into columnar particles using a granulator. The columnar particles are loaded into a ceramic crucible, covered and placed in a muffle furnace for calcination at a heating rate of 5 ° C / min. After calcination at 800 ° C for 4h, the columnar particles are naturally cooled and ground into powder;

[0062] e. The powder obtained in step d is mixed with silicate cement in a mass ratio of 2:5 by ball milling for 12 hours at a speed of 200 r / min to obtain a mixed powder; the obtained mixed powder, deionized water and 30 wt.% hydrogen peroxide are placed in a concrete mold in a mass ratio of 20:9:1 for mixing; the mold is covered with plastic wrap, foamed at room temperature, and naturally air-dried at room temperature for 4 days to obtain an industrial solid waste filler material.

[0063] In this embodiment, an industrial solid waste filler prepared by the method of the industrial solid waste filler of this embodiment is used, cement, industrial solid waste filler, water and foaming agent are mixed evenly according to the mass ratio of 30:17:15:4, poured and cured to obtain porous concrete adsorption particles, which are used as concrete composite adsorption materials for adsorbing and removing antimony and phosphorus. When the porous concrete adsorption particles prepared in this embodiment are used to treat antimony-phosphorus-containing wastewater, 1g of the porous concrete adsorption particles is added to 1L of wastewater to be treated with a total phosphorus concentration of 2mg / L and an antimony concentration of 5mg / L, and antimony and phosphorus are adsorbed and removed.

[0064] Experimental test analysis:

[0065] The solid waste used in this example is gypsum and red mud, which are mixed in a ratio of 1:2:1.7. The total phosphorus removal rate and antimony removal effect of the composite foamed concrete adsorbent prepared in this example are measured using the same test method as in Example 1. Figure 2 and Figure 3 It can be seen that the composite foamed concrete of this embodiment has an adsorption effect for removing phosphorus and antimony.

[0066] Embodiment 4:

[0067] This embodiment is basically the same as the above embodiment, with the following features:

[0068] In this embodiment, a method for industrial solid waste filler includes the following steps:

[0069] a. Pretreatment of industrial solid waste: using industrial solid waste dolomite and OG mud, placing the dolomite and OG mud in a drying oven at 105-110°C for 4 hours to obtain dry dolomite and OG mud, grinding and screening to obtain industrial solid waste powder;

[0070] b. Add the mixture of industrial solid waste powder and deionized water into a ball mill, mix dolomite, OG mud and deionized water in a mass ratio of 1:1:1.4, cover and put into a ball mill for ball milling for 30 minutes, the ball milling speed is 200r / min, and the pH is adjusted to 9-11 to obtain a slurry mixture;

[0071] c. After the ball mill stops running, the water slurry mixture obtained in step b is placed in a centrifuge for centrifugation for 5 minutes at a speed of 3000 r / min. After the centrifugation is completed, the supernatant is removed, and the remaining fixed material is formed and placed in a drying oven at 80°C for 12 hours to obtain a solid material;

[0072] d. The solid material obtained in step c is ground into powder and made into columnar particles using a granulator. The columnar particles are loaded into a ceramic crucible, covered and placed in a muffle furnace for calcination at a heating rate of 5 ° C / min. After calcination at 800 ° C for 4h, the columnar particles are naturally cooled and ground into powder;

[0073] e. The powder obtained in step d is mixed with silicate cement in a mass ratio of 2:5 by ball milling for 12 hours at a speed of 200 r / min to obtain a mixed powder; the obtained mixed powder, deionized water and 30 wt.% hydrogen peroxide are placed in a concrete mold in a mass ratio of 20:9:1 for mixing; the mold is covered with plastic wrap, foamed at room temperature, and naturally air-dried at room temperature for 4 days to obtain an industrial solid waste filler material.

[0074] In this embodiment, an industrial solid waste filler prepared by the method of the industrial solid waste filler of this embodiment is used, and cement, industrial solid waste filler, water and foaming agent are mixed evenly according to the mass ratio of 30:20:15:3, and poured and cured to obtain porous concrete adsorption particles, which are used as concrete composite adsorption materials for adsorbing and removing antimony and phosphorus. When the porous concrete adsorption particles prepared in this embodiment are used to treat antimony-phosphorus-containing wastewater, 1g of the porous concrete adsorption particles is added to 1L of wastewater to be treated with a total phosphorus concentration of 2mg / L and an antimony concentration of 5mg / L, and antimony and phosphorus are adsorbed and removed.

[0075] Experimental test analysis:

[0076] The solid waste used in this example is dolomite, OG mud and deionized water, which are mixed in a ratio of 1:1:1.4. The total phosphorus removal rate and antimony removal effect of the composite foamed concrete adsorbent prepared in this example are measured using the same test method as in Example 1. Figure 2 and Figure 3 It can be seen that the composite foamed concrete of this embodiment has an adsorption effect of phosphorus and antimony removal.

[0077] Embodiment 5:

[0078] This embodiment is basically the same as the above embodiment, with the following features:

[0079] In this embodiment, a method for industrial solid waste filler includes the following steps:

[0080] a. Pretreatment of industrial solid waste: using industrial solid waste dolomite and OG mud, placing the dolomite and OG mud in a drying oven at 105-110°C for 4 hours to obtain dry dolomite and OG mud, grinding and screening to obtain industrial solid waste powder;

[0081] b. Add the mixture of industrial solid waste powder and deionized water into a ball mill, mix dolomite, OG mud and deionized water in a mass ratio of 3:1:1, cover and put into a ball mill for ball milling for 30 minutes, the ball milling speed is 200r / min, and the pH is adjusted to 9-11 to obtain a water slurry mixture;

[0082] c. After the ball mill stops running, the water slurry mixture obtained in step b is placed in a centrifuge for centrifugation for 5 minutes at a speed of 3000 r / min. After the centrifugation is completed, the supernatant is removed, and the remaining fixed material is formed and placed in a drying oven at 80°C for 12 hours to obtain a solid material;

[0083] d. The solid material obtained in step c is ground into powder and made into columnar particles using a granulator. The columnar particles are loaded into a ceramic crucible, covered and placed in a muffle furnace for calcination at a heating rate of 5 ° C / min. After calcination at 800 ° C for 4h, the columnar particles are naturally cooled and ground into powder;

[0084] e. The powder obtained in step d is mixed with silicate cement in a mass ratio of 2:5 by ball milling for 12 hours at a speed of 200 r / min to obtain a mixed powder; the obtained mixed powder, deionized water and 30 wt.% hydrogen peroxide are placed in a concrete mold in a mass ratio of 20:9:1 for mixing; the mold is covered with plastic wrap, foamed at room temperature, and naturally air-dried at room temperature for 4 days to obtain an industrial solid waste filler material.

[0085] In this embodiment, an industrial solid waste filler prepared by the method of the industrial solid waste filler of this embodiment is used, and cement, industrial solid waste filler, water and foaming agent are mixed evenly according to the mass ratio of 30:20:15:3, and poured and cured to obtain porous concrete adsorption particles, which are used as concrete composite adsorption materials for adsorbing and removing antimony and phosphorus. When the porous concrete adsorption particles prepared in this embodiment are used to treat antimony-phosphorus-containing wastewater, 1g of the porous concrete adsorption particles is added to 1L of wastewater to be treated with a total phosphorus concentration of 2mg / L and an antimony concentration of 5mg / L, and antimony and phosphorus are adsorbed and removed.

[0086] Experimental test analysis:

[0087] The solid waste used in this example is dolomite, OG and deionized water, which are mixed in a ratio of 3:1:1. The total phosphorus removal rate and antimony removal effect of the composite foamed concrete adsorbent prepared in this example are measured using the same test method as in Example 1. Figure 2 and Figure 3 It can be seen that the composite foamed concrete of this embodiment has an adsorption effect of phosphorus and antimony removal.

[0088] Based on the above embodiments, it can be seen that Figure 1 Electron microscope image of the composite foamed concrete of Example 1 of the present invention. Figure 2 The phosphorus removal effect of the composite foamed concrete of Examples 1, 4 and 5 of the present invention is shown by adsorption. Figure 3The composite foamed concrete of Examples 1, 4, and 5 of the present invention has an adsorption and antimony removal effect. The industrial solid waste filler prepared in the above examples can be used to prepare a porous concrete composite adsorption material for efficient adsorption and removal of antimony and phosphorus. The cement, solid waste filler, water, and foaming agent are evenly mixed according to the required mass ratio, and the porous concrete adsorption particle powder is obtained by pouring and curing. Taking 1g of the porous concrete adsorbent particle powder prepared above and adding it to 1L of a solution with a total phosphorus concentration of 2mg / L can reduce the total phosphorus concentration of the solution to below 0.2mg / L; taking 1g of the porous concrete adsorbent powder prepared above and adding it to 1L of a solution with an antimony concentration of 5mg / L can reduce the antimony concentration in the solution to below 0.5mg / L. Taking Example 1 as an example, take a small amount of the material before the adsorption reaction, observe the microscopic morphology of the adsorption material, and take an electron microscope picture, as shown in the attached figure. Figure 1 As shown. Figure 1 It can be seen that the foamed concrete adsorbent material has a relatively uneven rough surface, which provides more active sites for the adsorption process, and is conducive to reflecting the performance of the material in adsorbing phosphorus and antimony removal. According to the above examples, the present invention combines solid waste with silicate cement to prepare a new composite adsorbent material that can efficiently adsorb phosphorus and antimony in water, which is used for water treatment, has low cost, achieves the purpose of treating waste with waste, and effectively solves the problem of solid waste treatment, and has good environmental and economic benefits. Because conventional adsorbents such as activated alumina and diatomaceous earth are expensive, the cost of treating phosphorus-containing wastewater is too high. Therefore, the present invention uses natural materials and solid waste to synthesize an adsorbent that can adsorb phosphorus and antimony, which has important practical significance and demonstration effect for solid waste resource utilization, clean production and energy conservation and emission reduction. The preparation method and application of industrial solid waste filler, cement and this solid waste filler are combined to obtain foamed concrete with adsorption, effectively combining the adsorption effect with the characteristics of concrete, showing a good adsorption effect of phosphorus and antimony removal, and low cost, which plays the purpose of treating waste with waste.

[0089] The above describes the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made according to the purpose of the invention. Any changes, modifications, substitutions, combinations or simplifications made according to the spirit and principle of the technical solution of the present invention should be equivalent replacement methods. As long as they meet the purpose of the invention and do not deviate from the technical principles and inventive concepts of the method of the industrial solid waste filler of the present invention and its application, they belong to the protection scope of the present invention.

Claims

1. A method for preparing an industrial solid waste filler, characterized in that: The steps include: a. Pretreatment of industrial solid waste: using industrial solid waste, according to the mass ratio of components, the mass ratio of industrial solid waste meets the requirement of calcium and iron mass ratio of (55-80): (45-20), then drying, grinding and screening the industrial solid waste to obtain industrial solid waste powder; b. The industrial solid waste powder obtained in step a and deionized water were mixed and stirred, and the pH was adjusted to 9-11 to obtain a slurry mixture; c. The solids in the slurry mixture obtained in step b are separated, the collected fixed material is formed and dried, and the drying temperature is controlled not higher than 80 ° C to obtain a solid material; d. The solid material obtained in step c is calcined at 800 to 1000 ° C for 3 to 4 hours, and then naturally cooled, and then the calcined product is cooled and ground into a solid powder; e. The powder obtained in step d is mixed with silicate cement in a mass ratio of 2:5 to obtain a mixed powder; the mixed powder, deionized water and 30wt.% of hydrogen peroxide are placed in a concrete mold in a mass ratio of 20:9:1 for mixing; the mold is covered with plastic wrap, foamed at room temperature and naturally air-dried at room temperature for at least 4 days, thereby preparing an industrial solid waste filler material.

2. The method for preparing the industrial solid waste filler according to claim 1, characterized in that: In step a, the industrial solid waste is any one of dolomite, calcite, gypsum, blast furnace slag, steel slag, red mud, fly ash, OG mud or any mixture of any two or more thereof, wherein the OG mud is solid waste generated by a wet OG dust removal process in a steelmaking converter to reduce particulate matter in smoke.

3. The method for preparing the industrial solid waste filler according to claim 1, characterized in that: In the step a, the industrial solid waste is placed in a drying oven at 105-110° C. for at least 4 hours to obtain dried industrial solid waste, which is then ground and screened to obtain industrial solid waste powder.

4. The method for preparing the industrial solid waste filler according to claim 1, characterized in that: In the step b, the mass ratio of solid waste powder to water is (1.3-4): (0.6-1.8).

5. The method for preparing the industrial solid waste filler according to claim 1, characterized in that: In the step b, a mixture of industrial solid waste powder and deionized water is added to a ball milling jar, which is covered and placed in a ball mill for ball milling for at least 30 minutes at a rotation speed of not less than 200 r / min to obtain a water slurry mixture.

6. The method for preparing the industrial solid waste filler according to claim 1, characterized in that: In the step c, the water slurry mixture is placed in a centrifuge for centrifugal treatment for at least 5 minutes, the centrifuge speed is not less than 3000r / min, and after the centrifugation is completed, the upper clear liquid is removed, and the remaining fixed material is placed in a drying box for drying for at least 12 hours to obtain a solid material.

7. The method for preparing the industrial solid waste filler according to claim 1, characterized in that: In the step d, the solid material is ground into powder and made into columnar particles using a granulator. The columnar particles are loaded into a ceramic crucible, covered and placed in a muffle furnace for roasting. The heating rate is not less than 5°C / min. After roasting for 3 to 4 hours, the crucible is naturally cooled and the prepared columnar particles are ground into powder.

8. The method for preparing the industrial solid waste filler according to claim 1, characterized in that: In the step e, the powder obtained in step d is mixed with silicate cement by ball milling for at least 12 hours, and the rotation speed of the ball milling is not less than 200 r / min to obtain a mixed powder.

9. An application of an industrial solid waste filler prepared by the method for preparing an industrial solid waste filler according to claim 1, characterized in that: Cement, industrial solid waste filler, water and foaming agent are uniformly mixed in a mass ratio of (15-50): (20-45): (10-30): (3-5), poured and cured to obtain porous concrete adsorption particles, which are used as concrete composite adsorption materials for adsorbing and removing antimony and phosphorus.

10. The use according to claim 9, characterized in that: When treating wastewater containing antimony and phosphorus, take 1g of porous concrete adsorption particles and add them into 1L of wastewater to be treated with a total phosphorus concentration of not less than 2mg / L and an antimony concentration of not less than 5mg / L to adsorb and remove antimony and phosphorus.

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