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a gelling material

A technology of cementitious materials and raw materials, applied in cement production and other directions, can solve the problems of environmental and human hazards, incomplete detoxification, etc., and achieve the effects of large solidification, reduction of diffusion and leaching rate, and obvious effect.

Active Publication Date: 2020-01-07
贵州通济智医科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the discharge and stockpiling of chromium slag will cause huge potential harm to the environment and human beings
[0003] At present, the treatment method of chromium slag is mainly reduction detoxification method, by adding FeS, FeSO 4 and other reducing agents to reduce hexavalent chromium to trivalent chromium with low toxicity, but this method is not complete in detoxification, and the treated chromium slag is easily oxidized to hexavalent chromium by oxygen in the air again, which cannot fundamentally solve the problem

Method used

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Effect test

Embodiment 1

[0029] A cementitious material consisting of the following raw materials in weight fractions: 20 parts of chromium slag, 20 parts of aluminum profile waste slag, 40 parts of slag powder, 5 parts of diatomaceous earth, 1 part of silica fume, 0.5 part of reducing agent, and alkaline activator 3 parts, 0.1 part of complexing agent, 0.01 part of sucrose, 2 parts of water reducing agent.

[0030] The reducing agent is composed of stannous pyrophosphate, sodium pyrosulfite and sodium hypophosphite.

[0031] The basic activator is composed of water glass with a modulus of 1.5, triisopropanolamine and sodium ethylate in a weight ratio of 80:10:1.

[0032] The complexing agent is iminodiacetic acid.

[0033] The water reducer is a powder polycarboxylate water reducer.

Embodiment 2

[0035] A cementitious material consisting of the following raw materials in weight fractions: 30 parts of chrome slag, 15 parts of aluminum profile waste slag, 60 parts of slag powder, 2 parts of diatomite, 3 parts of silica fume, 0.1 part of reducing agent, and alkaline activator 8 parts, 0.05 part of complexing agent, 0.1 part of sucrose, 0.5 part of water reducing agent.

[0036] The reducing agent is composed of sodium metabisulfite and zinc borohydride in a weight ratio of 3:1.

[0037] The basic activator is composed of water glass with a modulus of 1.8, triisopropanolamine and sodium ethylate in a weight ratio of 100:5:1.

[0038] The complexing agent is disodium edetate.

[0039] The water reducer is a powder polycarboxylate water reducer.

Embodiment 3

[0041] A cementitious material consisting of the following raw materials in weight fractions: 27 parts of chromium slag, 16 parts of aluminum profile waste slag, 53 parts of slag powder, 3 parts of diatomaceous earth, 2 parts of silica fume, 0.4 part of reducing agent, and alkaline activator 6 parts, 0.08 parts of complexing agent, 0.06 parts of sucrose, 1.2 parts of water reducing agent.

[0042] The reducing agent is composed of stannous pyrophosphate and dihydroxyacetone in a weight ratio of 6:1.

[0043] The basic activator is composed of water glass with a modulus of 1.6, triisopropanolamine and sodium ethylate in a weight ratio of 100:8:1.

[0044] The complexing agent is disodium edetate.

[0045] The water reducer is a powder polycarboxylate water reducer.

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Abstract

The invention belongs to the technical field of environmental protection, and discloses an environment-friendly gel material. The environment-friendly gel material is prepared from the following raw materials in parts by weight: 20-30 parts of chromium residue, 15-20 parts of aluminum profile residue, 40-60 parts of slag powder, 2-5 parts of kieselguhr, 1-3 parts of silica fume, 0.1-0.5 part of a reducing agent, 3-8 parts of an alkali activator, 0.05-0.1 part of a complexing agent, 0.01-0.1 part of sucrose and 0.5-2 parts of a water reducing agent. The environment-friendly gel material is obvious in hexavalent chromium detoxication effect, high in curing amount and low in leaching toxicity, and can realize harmless and resourceful treatment of the chromium residue.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a gelling material. Background technique [0002] Chromium slag is the residue left after chromite ore plus soda ash, limestone, and dolomite are roasted at a high temperature of 1100-1200 ℃, and the chromium salt is dissolved in water. For every 1 ton of chromium salt produced, 3-5t of chromium slag can be discharged. Because chromium slag contains water-soluble hexavalent chromium, it can cause harm to the human body through skin contact, respiratory inhalation, environmental exposure, etc. It can cause skin allergies for sensitive people, so that cement allergic contact eczema that is difficult to cure is formed. Cr(VI) can also cause serious adverse consequences such as carcinogenesis and gene mutation. The International Agency for Research on Cancer (IARC) has listed hexavalent chromium as a carcinogen, which can cause cancer whether it is inhale...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/24C04B7/147
CPCC04B7/147C04B7/24Y02P40/10
Inventor 程旺生
Owner 贵州通济智医科技有限公司
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