Process for preparing refractory material by recycling waste refractory material

Abstract

The invention discloses a process for preparing a refractory material by recycling waste refractory materials. The refractory material is prepared by recycling the waste refractory materials through aluminum ash purification, multi-group mixing and high-temperature calcination. Industrial aluminum ash is purified to prepare an aluminum oxide raw material, so that the aluminum oxide content of the refractory material is increased; through multi-component mixing and high-temperature sintering, the feasibility of synergistically preparing the refractory material from the multi-component hazardous waste is determined.

Description

Technical Field

[0001] The present invention relates to the technical field of waste refractory material processing, and in particular to a process for recycling waste refractory materials to prepare refractory materials. Background Art

[0002] Since the discarded refractory materials after use by hazardous waste incineration disposal enterprises are hazardous waste, the current treatment method is safe landfill. This method is not only polluting to the environment and occupies a large amount of land resources, but the discarded refractory materials usually contain certain recyclable resources. The landfill method cannot effectively recycle and utilize these resources, resulting in a certain amount of resource waste. Summary of the invention

[0003] The purpose of the present invention is to provide a process for preparing refractory materials by recycling waste refractory materials. The present invention processes waste refractory materials to prepare refractory materials for recycling.

[0004] The technical solution of the present invention is a process for preparing refractory materials by recycling waste refractory materials, characterized in that it comprises the following steps:

[0005] S1. Aluminum ash purification: Process and purify the incoming industrial aluminum ash;

[0006] S2. Multi-group blending: The purified aluminum powder is blended with different waste refractory materials in different proportions to obtain a mixture; the main components of different waste refractory materials are aluminum oxide, silicon dioxide, magnesium oxide, calcium oxide, etc. After testing, according to the content of aluminum oxide and silicon dioxide in different aluminum ash and waste refractory materials, according to the ingredient formula, the aluminum ash and waste refractory materials are mixed in a ratio of about 1:3-1:6, and finally the purified aluminum powder is added to obtain a mixture;

[0007] S3. High temperature calcination: calcining the mixture to prepare refractory materials.

[0008] In the aforementioned process of recycling waste refractory materials to prepare refractory materials, the aluminum ash purification described in S1 is specifically as follows:

[0009] S1.1, Separation: Separate the metallic aluminum from other components in the aluminum ash by physical or chemical methods to obtain product A;

[0010] S1.2, cooling: cooling product A to room temperature to obtain product B;

[0011] S1.3, grinding: grinding product B to a particle size of less than 30 mm to obtain product C;

[0012] S1.4, Leaching: Leach product C to further extract the desired components to obtain product D; Horizontal oscillation leaching is performed on product C to further extract the desired components to obtain product D.

[0013] S1.5, washing and filtration: Wash and filter product D to improve purity and obtain product E;

[0014] S1.6. Drying: Dry product E to obtain clean aluminum powder.

[0015] In the aforementioned process of recycling waste refractory materials to prepare refractory materials, the waste refractory materials described in S2 are waste refractory materials.

[0016] In the aforementioned process of recycling waste refractory materials to prepare refractory materials, the high temperature calcination described in S3 has the following specific contents:

[0017] The mixed material is sintered at 1500°C in a high temperature furnace to prepare a refractory material containing aluminum oxide.

[0018] Compared with the prior art, the present invention processes industrial aluminum ash and mixes it with waste refractory materials, and finally prepares new refractory materials through calcination, thereby realizing the recycling of waste refractory materials.

[0019] Through multi-component blending and high-temperature sintering, the feasibility of the scheme for the synergistic preparation of refractory precursors from multiple hazardous wastes is determined, and the regeneration scheme is optimized by comprehensively considering the chemical reaction and regeneration cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the element analysis diagram of 100 tons of refractory material of Weineng in the embodiment;

[0021] Figure 2 This is the data chart of 100 tons of refractory silica in the embodiment;

[0022] Figure 3 This is the data chart of 100 tons of refractory aluminum oxide in the embodiment;

[0023] Figure 4 This is the element analysis diagram of the 50-ton refractory material of Weineng in the embodiment;

[0024] Figure 5 This is the data chart of 50 tons of refractory silica in the embodiment;

[0025] Figure 6 This is the data chart of Weineng 50 tons of refractory aluminum oxide in the embodiment;

[0026] Figure 7 This is the element analysis diagram of Chunhui refractory materials in the embodiment;

[0027] Figure 8 It is the data diagram of Chunhui refractory silicon dioxide in the embodiment;

[0028] Fig. 9This is a data chart of Chunhui refractory aluminum oxide in the embodiment;

[0029] Fig.10 This is the element analysis diagram of the refractory material after sintering in the embodiment;

[0030] Fig.11 This is a data diagram of aluminum oxide after sintering in the embodiment;

[0031] Fig.12 This is a graph of silicon dioxide data after sintering in the examples. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0033] Embodiment. A process for recycling waste refractory materials to prepare refractory materials comprises the following steps:

[0034] S1. Aluminum ash purification: Process and purify the incoming industrial aluminum ash;

[0035] S2. Multi-group blending: The purified aluminum powder is blended with different waste refractory materials in different proportions to obtain a mixture; the main components of different waste refractory materials are aluminum oxide, silicon dioxide, magnesium oxide, calcium oxide, etc. After testing, according to the content of aluminum oxide and silicon dioxide in different aluminum ash and waste refractory materials, according to the ingredient formula, the aluminum ash and waste refractory materials are mixed in a ratio of about 1:3-1:6, and finally the purified aluminum powder is added to obtain a mixture;

[0036] S3. High temperature calcination: calcining the mixture to prepare refractory materials.

[0037] The specific contents of the aluminum ash purification described in S1 are as follows:

[0038] S1.1, Separation: The metallic aluminum in the aluminum ash is separated from other components by the suspension method to obtain product A; the purpose is to maximize the recovery of metallic aluminum in the aluminum ash;

[0039] S1.2, Cooling: Cool product A to room temperature to obtain product B; product B exists in solid form, which is convenient for subsequent processing and transportation;

[0040] S1.3, grinding: grinding product B to a particle size of less than 30 mm to obtain product C;

[0041] S1.4, Leaching: Horizontally oscillate product C to further extract the desired components to obtain product D; the leaching treatment can be carried out with water or acid;

[0042] S1.5, washing and filtration: Wash and filter product D to improve purity and obtain product E;

[0043] S1.6. Drying: Dry product E to obtain clean aluminum powder.

[0044] Before blending, the waste refractory materials are analyzed for composition, specifically:

[0045] Firstly, the components and failure modes of different types of refractory materials are classified and their chemical composition is analyzed, mainly focusing on the heavy metals in the waste refractory materials, the content of aluminum oxide and silicon dioxide after high-temperature melting, and the content of halogen anions and cyanide.

[0046] The waste refractory materials described in S2 are waste refractory materials.

[0047] When multiple groups are blended, they are blended in different proportions based on the results of component analysis.

[0048] The high temperature calcination described in S3 is specifically as follows:

[0049] The mixed material is sintered at 1500°C in a high temperature furnace to prepare a refractory material containing aluminum oxide.

[0050] Experimental proof

[0051] The aluminum ash used in the experiment came from Zhejiang Mihuang New Materials Co., Ltd., and the refractory materials were taken from our factory Huzhou Weneng Environmental Services Co., Ltd. and Zhejiang Chunhui Energy Environmental Protection Co., Ltd.

[0052] We have tested our 100 ton refractory materials, 50 ton refractory materials and Chunhui refractory materials. The specific test data are as follows: Figure 1-9 .

[0053] The refractory materials of each component are mixed. The main components of different waste refractory materials are aluminum oxide, silicon dioxide, magnesium oxide, calcium oxide, etc. After testing, the aluminum oxide and silicon dioxide in different waste refractory materials are mixed in a ratio of 1:3-1:6, and finally the purified aluminum powder is added to obtain a mixture.

[0054] High temperature calcination: sintering the blended mixture at 1500°C in a high temperature furnace to prepare a refractory material containing alumina.

[0055] The experimental data of refractory materials after sintering are as follows: Figure 10-12 .

[0056] Through the comparison of the above experimental data, it can be seen that the content of alumina in the sintered refractory material is significantly increased.

Claims

1. A process for preparing refractory materials by recycling waste refractory materials, characterized in that: The steps include: S1. Aluminum ash purification: Process and purify the incoming industrial aluminum ash; S2. Multi-group blending: blend the purified aluminum powder with different waste refractory materials in different proportions to obtain a mixture; S3. High temperature calcination: calcining the mixture to prepare refractory materials.

2. The process for preparing refractory materials by recycling waste refractory materials according to claim 1, characterized in that: The specific contents of the aluminum ash purification described in S1 are as follows: S1.1, Separation: Separate the metallic aluminum from other components in the aluminum ash by physical or chemical methods to obtain product A; S1.2, cooling: cooling product A to room temperature to obtain product B; S1.3, Grinding: Grind product B to a particle size of less than 30 mm to obtain product C; S1.4, leaching: subject product C to horizontal oscillation leaching to further extract the desired components to obtain product D; S1.5, washing and filtration: Wash and filter product D to improve purity and obtain product E; S1.

6. Drying: Dry product E to obtain clean aluminum powder.

3. The process for preparing refractory materials by recycling waste refractory materials according to claim 1, characterized in that: The waste refractory materials described in S2 are waste refractory materials.

4. The process for preparing refractory materials by recycling waste refractory materials according to claim 1, characterized in that: The high temperature calcination described in S3 is specifically as follows: The mixed material is sintered at 1500°C in a high temperature furnace to prepare a refractory material containing aluminum oxide.

Images