Ceramic water reducing agent and preparation method therefor

Abstract

A ceramic water reducing agent and a preparation method therefor. The components of the ceramic water reducing agent comprise: Na2O: ≥ 14%; and SiO2: ≥ 26%. The preparation method therefor comprises: step (a): at a first preset temperature, silicon residue and an alkali solution generated during a zirconium oxychloride production process undergoing a reaction for a first preset time to obtain a clear solution, wherein the mass ratio of the silicon residue to the alkali solution is 1:2-1:5; and step (b): at a second preset temperature, the clear solution having been concentrated to a preset concentration reacting with quartz for a second preset time, and filtering the reaction product to obtain the ceramic water reducing agent, wherein the mass ratio of the clear solution to the quartz is 2:1-6:1. By using the silicon residue and the waste alkali solution generated during the zirconium oxychloride production process as raw materials, resource utilization of waste liquid and waste residues is achieved, and therefore, the "three-waste" treatment cost is saved.

Description

A ceramic water reducing agent and preparation method thereof Technical Field

[0001] The invention belongs to the technical field of inorganic compound processing, and particularly relates to a ceramic water reducing agent and a preparation method thereof. Background Art

[0002] Ceramic water reducers are widely used in the ceramic industry's mud making, slurry grinding, and glaze-making processes. They can reduce the water content of slurries and glazes, improve fluidity, prevent resetting, and maintain good stability. Sodium silicate-based ceramic water reducers are one of the main types of ceramic water reducers, offering strong adaptability, excellent water-reducing effects, and a high cost-effectiveness.

[0003] The "one acid, one alkali" method for preparing zirconium oxychloride is the primary production process in the zirconium oxychloride industry. This method generates large amounts of waste alkali liquor and waste silicon slag. Every ton of zirconium oxychloride produced generates 0.5-0.7 tons of silicon slag and 5-6 tons of waste alkali liquor. China leads the world in both zirconium oxychloride production capacity and output. However, the treatment and comprehensive utilization of these "three wastes" during production are major constraints to the development of both companies and the industry.

[0004] Currently, methods for treating waste alkali liquor and waste silicon slag from the "one acid, one alkali" process for zirconium oxychloride production include using silicon slag to produce white carbon black and using waste alkali liquor to produce sodium metasilicate pentahydrate. Furthermore, Chinese patent number CN200310013938.9 discloses the production of sodium metasilicate pentahydrate and anhydrous sodium silicate using wastewater from zirconium oxychloride production. These three methods treat only one type of waste liquid or waste residue, failing to comprehensively utilize both waste liquid and waste residue, thus increasing the difficulty of treating the "three wastes." Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a ceramic water reducer and a preparation method thereof, which uses silicon slag and waste alkali liquid generated in the zirconium oxychloride production process as raw materials to realize the resource utilization of waste liquid and waste slag, thereby saving the cost of "three wastes" treatment.

[0006] In a first aspect, the present invention provides a ceramic water reducer, characterized in that the composition of the ceramic water reducer is: Na2O ≥ 14%, SiO2 ≥ 26%.

[0007] In a second aspect, the present invention provides a method for preparing a ceramic water-reducing agent, characterized in that it comprises the following steps:

[0008] Step (a), reacting silicon slag produced in the zirconium oxychloride production process with alkaline solution at a first preset temperature for a first preset time to obtain a clarified solution, wherein the mass ratio of silicon slag to alkaline solution is 1:2-1:5;

[0009] Step (b) reacting the clarified solution concentrated to a preset concentration with quartz at a second preset temperature for a second preset time, and then filtering to obtain a ceramic water reducer, wherein the mass ratio of the clarified solution to the quartz is 2:1-6:1.

[0010] Furthermore, in step (a), the composition of silicon slag is: SiO2≥18%, H2O:≤82%; the composition of alkali solution is: Na2O:≥8%

[0011] Furthermore, in the step (a), the first preset temperature is 40-90° C., and the first preset time is 1-3 hours.

[0012] Furthermore, in step (b), the concentration of the clarified solution is 1.1-1.5 g / cm 3 .

[0013] Furthermore, in the step (b), the second preset temperature is 150-210° C., and the second preset time is 2-12 hours.

[0014] Compared with the existing technology, the present invention uses silicon slag and waste alkali liquid generated in the zirconium oxychloride production process as raw materials to realize the resource utilization of waste liquid and waste slag, thereby saving the cost of "three wastes" treatment. DETAILED DESCRIPTION

[0015] The following examples are intended only to illustrate the present invention and are not intended to limit it. Example 1

[0016] Weigh 100 g of silicon slag (SiO2: 20.1%, H2O: 79.1%) and 300 g of alkali solution (Na2O: 8.5%), react at 50 °C for 1 h, and concentrate the solution to a specific gravity of 1.30 g / cm 3 Then, 200 g of the concentrated solution and 100 g of quartz powder (150 mesh) were weighed and reacted at 180 ° C for 2 h. After filtration, a ceramic water reducer was obtained, the composition of which was: Na2O: 14.5%, SiO2: 28.1%. Example 2

[0017] Weigh 100 g of silicon slag (SiO2: 20.1%, H2O: 79.1%) and 400 g of alkali solution (Na2O: 8.5%), react at 70 °C for 3 h, and concentrate the solution to a specific gravity of 1.34 g / cm 3 Then, 300 g of the concentrated solution and 60 g of quartz powder (150 mesh) were weighed and reacted at 200 ° C for 8 h. After filtration, a ceramic water reducer was obtained, the composition of which was: Na2O: 14.2%, SiO2: 26.6%. Example 3

[0018] Weigh 100 g of silicon slag (SiO2: 20.1%, H2O: 79.1%) and 500 g of alkali solution (Na2O: 8.5%), react at 80 °C for 2 h, and concentrate the solution to a specific gravity of 1.40 g / cm 3 Then, 300 g of the concentrated solution and 50 g of quartz powder (150 mesh) were weighed and reacted at 160 ° C for 12 h. After filtration, a ceramic water reducer was obtained, the composition of which was: Na2O: 14.3%, SiO2: 27.1%.

[0019] Example 4

[0020] Ceramic water reducer performance test

[0021] In order to test whether the ceramic water-reducing agent prepared by the method of the present invention has excellent water-reducing performance, the ceramic water-reducing agent is mixed with ceramic mud mortar and ball-milled, and then the slurry flow rate test is performed on the ceramic mud mortar. The flow rate test method of ceramic mud mortar is as follows:

[0022] (1) Weigh 86g of clay, 8g of bentonite, 8g of magnesia soil, 8g of sodium feldspar, 44g of kaolin, 40g of porcelain clay, 2g of potassium feldspar, and 1g of ceramic water reducer;

[0023] (2) Place the above materials into a planetary ball mill and mill them. Add 100g of water and mill them for 30 minutes. Then use a paint viscometer to test the slurry flow rate.

[0024] According to the ceramic water-reducing agent flow rate test method, Examples 1, 2, and 3, commercially available ceramic water-reducing agents, and blanks were added for control tests. The slurry flow rate was tested using a paint and coating viscometer. The shorter the flow rate time, the better the water-reducing effect. The results are as follows:

[0025] Water Reduction Performance Test Table

[0026] Sample No. Parallel Test 1 / s Parallel Test 2 / s Flow Rate Average / s Blank 134140137 Example 1323634 Example 2383436 Example 3404241 Commercial Ceramic Water Reducer 333735

[0027] It can be seen from the above table that the water-reducing effect of adding the ceramic water-reducing agent of the present invention is obvious, and is comparable to that of commercially available ceramic water-reducing agents.

[0028] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above-mentioned embodiments only express several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several variations and improvements can be made, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. A ceramic water reducing agent, characterized in that: The composition of the ceramic water reducing agent is: Na2O≥14%, SiO2≥26%.

2. A method for preparing a ceramic water reducing agent, characterized in that: The following steps are involved: Step (a), reacting silicon slag produced in the zirconium oxychloride production process with alkali solution at a first preset temperature for a first preset time to obtain a clarified solution, wherein the mass ratio of silicon slag to alkali solution is 1:2-1:5; Step (b), at a second preset temperature, reacting the clarified solution concentrated to a preset concentration with quartz for a second preset time, and then filtering to obtain a ceramic water reducing agent, wherein the mass ratio of the clarified solution to the quartz is: 2:1-6:

1.

3. The method according to claim 1, characterized in that In the step (a), the composition of the silicon slag is: SiO2 ≥ 18%, H2O: ≤ 82%; the composition of the alkali solution is: Na2O: ≥ 8%.

4. The method according to claim 1, characterized in that In the step (a), the first preset temperature is 40-90° C., and the first preset time is 1-3 hours.

5. The method according to claim 1, characterized in that In step (b), the concentration of the clarified solution is 1.1-1.5 g / cm 3 .

6. The method according to claim 1, characterized in that In the step (b), the second preset temperature is 150-210° C., and the second preset time is 2-12 hours.