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Curing agent and curing method for titanium-extracted tail slag

A technology of titanium tailings extraction and solidification method, which is applied in the field of environmental protection, can solve the problems of lack of treatment means, seepage of titanium tailings, impact on the surrounding environment, etc. than reasonable effect

Inactive Publication Date: 2017-08-29
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is directly stored without treatment, the harmful elements in the titanium tailings will seep out and affect the surrounding environment
At present, there are few literatures and patents on the harmless treatment and comprehensive utilization of titanium extraction tailings, and the relevant treatment methods are very scarce

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a curing agent for extracting titanium tailings, which includes, in parts by weight: 10 parts of quicklime dedusting ash, 10 parts of desulfurized gypsum, and 1 part of silicone waterproofing agent.

[0033] This embodiment provides a method for solidifying titanium tailings with the above curing agent, including:

[0034] S1. Mix 20kg of titanium tailings, 4.4kg of curing agent and 6kg of water, and stir to obtain a mixed slurry.

[0035] S2. Let the mixed slurry stand at room temperature for 48 hours to solidify to obtain a consolidated body.

[0036] The compressive strength of the consolidated body reaches 5MPa. The leaching rate of chlorine is less than 1%, the pH value is between 6 and 7, and the leaching of other harmful substances meets the standard requirements.

Embodiment 2

[0038] This embodiment provides a curing agent for extracting titanium tailings, which includes, in parts by weight: 30 parts of steel slag powder, 5 parts of titanium gypsum, and 2 parts of silicone waterproofing agent.

[0039] This embodiment provides a method for solidifying titanium tailings with the above curing agent, including:

[0040] S1. Mix 20kg of titanium extraction tailings, 7.4kg of curing agent and 6.4kg of water, and stir to obtain a mixed slurry.

[0041] S2. Let the mixed slurry stand at room temperature for 48 hours to solidify to obtain a consolidated body.

[0042] The compressive strength of the consolidated body reaches 4.5MPa. The leaching rate of chlorine is less than 1%, the pH value is between 7 and 8, and the leaching of other harmful substances meets the standard requirements.

Embodiment 3

[0044] This embodiment provides a curing agent for extracting titanium tailings, which includes, in parts by weight: 20 parts of steel slag powder, 15 parts of desulfurized gypsum, and 1 part of silicone waterproofing agent.

[0045] This embodiment provides a method for solidifying titanium tailings with the above curing agent, including:

[0046] S1. Mix 20kg of titanium tailings, 7kg of curing agent and 5.6kg of water, and stir to obtain a mixed slurry.

[0047] S2. Let the mixed slurry stand at room temperature for 48 hours to solidify to obtain a consolidated body.

[0048] The compressive strength of the consolidated body reaches 4.8MPa. The leaching rate of chlorine is less than 1%, the pH value is between 7 and 8, and the leaching of other harmful substances meets the standard requirements.

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Abstract

The invention discloses a curing agent and a curing method for titanium-extracted tail slag and relates to the field of environment protection. The curing agent comprises 5-30 parts of excitant, 5-30 parts of enhancer and 0.5-1 part of waterproof agent, a main ingredient of the excitant is active calcium oxide, and a main ingredient of the enhancer is calcium sulfate. The calcium oxide and the calcium sulfate in the curing agent can react with glass in the titanium-extracted tail slag to efficiently generate a cured body. The waterproof agent forms a hydrophobic protection layer on the surface of the cured body, so that harmful elements can be effectively prevented from seeping. The curing agent is reasonable in proportion, and the cured body has the advantages of high strength and low harmful element seepage. Using the curing agent to cure the titanium-extracted tail slag is convenient to operate and needless of complex equipment, the titanium-extracted tail slag can be efficiently cured to obtain the high-strength cured body through simple mixing and standing, and the curing agent is suitable for instant use on an operation site and fit for being popularized and applied in industrial production.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a curing agent for extracting titanium tailings and a curing method for extracting titanium tailings. Background technique [0002] Titanium extraction tailings are the remaining residues after titanium-containing blast furnace slag has been subjected to high-temperature carbonization-low-temperature chlorination to extract titanium. If one million tons of blast furnace slag is processed per year, nearly 1 million tons of titanium extraction tailings can be produced. [0003] The main phases of titanium extraction tailings are pyroxene and feldspar vitreous substances, and contain harmful elements such as chlorine and manganese. If it is directly stored without treatment, the harmful elements in the titanium tailings will seep out and affect the surrounding environment. At present, there are few literatures and patents on the harmless treatment and comprehensive utilizati...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B28/14B09B3/00
CPCC04B40/0042B09B3/00C04B28/142C04B28/144C04B2111/00017C04B2201/50C04B18/0427C04B18/064C04B24/42C04B18/142C04B18/0445C04B18/141
Inventor 郝建璋黎建明文永才曾冠武
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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