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A special curing agent for aluminum smelting waste slag and its preparation method and application method

A curing agent and waste slag technology, which is applied in the field of special curing agent for aluminum smelting waste slag and its preparation, can solve the problems of reducing the pollution of aluminum smelting waste slag, poor long-term water stability, and restricting the large-scale application of aluminum smelting waste slag, so as to facilitate popularization and application , avoid secondary pollution, improve the effect of strength

Active Publication Date: 2021-11-19
程钰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing traditional curing agent cannot effectively reduce the pollution of aluminum smelting waste residue, and the long-term water stability is poor
Seriously restricting the large-scale application of aluminum smelting waste residue in the highway industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A special curing agent for aluminum smelting waste slag, which is prepared by mixing the following raw materials by weight: 38.5 parts of magnesium sulfite, 32 parts of fly ash, 25 parts of alkali slag, 1.5 parts of sodium sulfite, 0.5 part of polyaluminum ferric sulfate, chlorinated 2.5 parts of lanthanum;

[0024] A preparation method of a special curing agent for aluminum smelting waste slag, comprising the steps of:

[0025] (1) Take magnesium sulfite, dry the fly ash and alkali slag at 100°C, grind and pass through a 100-mesh sieve to obtain mixture A;

[0026] (2) Under normal temperature, fully mix sodium sulfite, lanthanum chloride and polymerized aluminum ferric sulfate to obtain mixture B;

[0027] (3) Mix the mixture A in step (1) and the mixture B in step (2), and grind the mixture evenly to obtain a finished curing agent.

[0028] The grinding time of the step (3) is 45 minutes, and the fineness is 300 meshes.

[0029] The application method of the speci...

Embodiment 2

[0031] A special curing agent for aluminum smelting waste residue, which is prepared by mixing the following raw materials by weight: 35 parts of magnesium sulfite, 30 parts of fly ash, 29 parts of alkali slag, 2.5 parts of sodium sulfite, 3 parts of lanthanum chloride, and polyaluminum sulfate 0.5 part of iron;

[0032] A preparation method of a special curing agent for aluminum smelting waste slag, comprising the steps of:

[0033] (1) Take magnesium sulfite, dry fly ash and alkali slag at 105°C, grind and pass through a 100-mesh sieve to obtain mixture A;

[0034] (2) Under normal temperature, fully mix sodium sulfite, lanthanum chloride and polymerized aluminum ferric sulfate to obtain mixture B;

[0035] (3) Mix the mixture A in step (1) and the mixture B in step (2), and grind the mixture evenly to obtain a finished curing agent.

[0036] The grinding time of the step (3) is 50 minutes, and the fineness is 350 meshes.

[0037] The application method of the special cur...

Embodiment 3

[0039] A special curing agent for aluminum smelting waste residue is prepared by mixing the following raw materials by weight: 30 parts of magnesium sulfite, 30 parts of fly ash, 26.2 parts of alkali slag, 1.5 parts of sodium sulfite, 0.8 parts of polyaluminum ferric sulfate, chlorinated 1.5 parts of lanthanum;

[0040] A preparation method of a special curing agent for aluminum smelting waste slag, comprising the steps of:

[0041] (1) Take magnesium sulfite, dry fly ash and alkali slag at 110°C, grind and pass through a 100-mesh sieve to obtain mixture A;

[0042] (2) Under normal temperature, fully mix sodium sulfite, lanthanum chloride and polymerized aluminum ferric sulfate to obtain mixture B;

[0043] (3) Mix the mixture A in step (1) and the mixture B in step (2), and grind the mixture evenly to obtain a finished curing agent.

[0044] The grinding time of the step (3) is 60 minutes, and the fineness is 400 meshes.

[0045] The application method of the special curi...

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PUM

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Abstract

The invention discloses a special curing agent for aluminum smelting waste slag and its preparation method and application, belonging to the field of road engineering. The technical problem to be solved by the invention is how to effectively reduce the pollution of aluminum smelting waste slag and improve the long-term durability of the aluminum smelting waste slag subgrade Stability, to meet the large-scale application of aluminum smelting waste residues in road construction, turning waste into treasure, and saving non-renewable land resources. Using the application method of the above curing agent, add the curing agent to the aluminum smelting waste residue, mix evenly to obtain the roadbed mixture, and use the roadbed mixture to lay the roadbed. The mass percentage of the curing agent in the roadbed mixture is 5%‑10 %. Compared with the prior art, the present invention has the advantages of effectively improving the compressive strength of aluminum smelting waste slag, reducing the pH value of aluminum smelting waste slag, saving material costs, reducing environmental pollution, etc., and utilizing industrial waste slag, waste utilization, resource saving and solidification The components of the agent are commonly used materials in engineering, and its cost is relatively low, which can produce direct economic benefits.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a special curing agent for aluminum smelting waste slag and a preparation method and application method thereof. Background technique [0002] Aluminum smelting slag is a kind of solid waste produced in the process of alumina production. Due to the difference of the main raw material bauxite and production process, the aluminum smelting slag discharged by different types and different enterprises exists in composition, property and phase. certain difference. Under normal circumstances, aluminum smelting waste slag contains a large amount of iron oxide, and its appearance is similar to red mud, also known as red mud. Usually, for every 1 ton of alumina produced, 0.8-2.0 tons of aluminum smelting slag will be produced. By the end of 2016, the cumulative stockpile of aluminum smelting slag in my country had exceeded 352 million tons. Only Shandong Province has a stockpile of more ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08
CPCC04B28/08C04B2111/0075C04B2201/50C04B22/12C04B22/14C04B22/142
Inventor 程钰
Owner 程钰