Chromium slag solidification gelling polymer

A technology of coagulating polymer and curing glue, applied in cement production and other directions, can solve the problems of insignificant chromium slag, difficult innocuous treatment, complex phase composition of chromium slag, etc., and achieve good mechanical properties, high compressive strength, The effect of simple process

Active Publication Date: 2015-10-07
沃德费默循环经济科技发展(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex phase composition of chromium slag, it is difficult to treat harmlessly
[0003] For the treatment of chromium slag, in the past, most of the research focused on the reduction of toxic hexavalent chromium to trivalent chromium, and some achievements have been made, such as using chromium slag instead of limestone for ironmaking, etc. It is insignificant than the chromium slag disposed of by this treatment method

Method used

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  • Chromium slag solidification gelling polymer
  • Chromium slag solidification gelling polymer
  • Chromium slag solidification gelling polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The influence of different mass parts of embodiment 1 on curing effect

[0032] Blast furnace slag and fly ash that have been ball milled for 12 hours are dried and refined. After refinement, the particle size of chromium slag, blast furnace slag and fly ash is 200 mesh. It is made by mixing sodium hydroxide and water glass at a mass ratio of 1:1.5 Compound stimulant. According to parts by mass (35 parts, 28 parts, 25 parts, 12 parts), (45 parts, 27 parts, 18 parts, 10 parts), (55 parts, 25 parts, 12 parts, 8 parts) respectively take the above refinement The final chromium slag, blast furnace slag, fly ash, composite activator, and add water to the composite activator at a liquid-solid ratio of 0.27:1 to prepare an activator solution, and then mix the blast furnace slag, fly ash and chromium slag evenly Add the activator solution, stir evenly, and then sequentially enter the mold, solidify, demould, and maintain at a temperature of 25 ° C and a relative humidity of 90%...

Embodiment 2

[0037] The impact of different mass ratios on the curing effect in the composite activator of embodiment 2

[0038] The blast furnace slag and fly ash that were ball milled for 12 hours were dried and refined. After refinement, the particle size of chromium slag, blast furnace slag and fly ash was 200 mesh, and sodium hydroxide and water glass were 1:1.5, 1: 2.3, 1:4 mixed to make a composite activator. Take 55 parts of refined chromium slag, 25 parts of blast furnace slag, 12 parts of fly ash, and 8 parts of composite activator, and add water to the composite activator at a liquid-solid ratio of 0.27:1 to prepare the activator solution, and then put the blast furnace After the slag, fly ash and chromium slag are mixed evenly, add the activator solution, stir evenly, and then put into the mold, solidify, demould, and maintain for 28 days at a temperature of 25°C and a relative humidity of 90% or more to obtain chromium respectively. The slag solidified gelling polymer, the pr...

Embodiment 3

[0042] The influence of embodiment 3 different liquid-solid ratios on solidification

[0043] Blast furnace slag and fly ash that have been ball milled for 12 hours are dried and refined. After refinement, the particle size of chromium slag, blast furnace slag and fly ash is 200 mesh. It is made by mixing sodium hydroxide and water glass at a mass ratio of 1:2.3 Compound stimulant. Take 55 parts of refined chromium slag, 25 parts of blast furnace slag, 12 parts of fly ash, and 8 parts of composite activator, and add water to the composite activator at a liquid-solid ratio of 0.25:1, 0.27:1, and 0.30:1. Get the activator solution, then mix the blast furnace slag, fly ash and chromium slag evenly, add the activator solution, stir evenly, then put into the mold, solidify, demould in sequence and under the conditions of temperature 25 ℃ and relative humidity above 90%. Carry out maintenance 28 days, obtain respectively chrome slag solidified gelling polymer, preparation steps are...

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Abstract

The invention relates to a chromium slag solidification gelling polymer. The polymer is an inorganic polymer gel formed through mutual connection of -Si-O-Al-O- bonds via a condensation polymerization reaction of geopolymer particles. The polymer comprises a zeolite phase composed of natrolite formed through a geopolymerization reaction, and a CSH mineral phase composed of calcium silicate hydrate and calcium aluminate generated through a hydration reaction. Most hexavalent chromium ions are solidified in the zeolite phase, and a small amount of hexavalent chromium ions are solidified in the CSH mineral phase, so the gelling polymer realizes immobilization of chromium ions in a geopolymer solidified body in an amorphous form. The chromium slag solidification gelling polymer is prepared through processing chromium slag, blast furnace slag and fly ash as raw materials by using a composite exciting agent composed of sodium hydroxide and water glass. A preparation method of the chromium slag solidification gelling polymer is simple to operate, and the gelling polymer prepared in the invention has good mechanical performances, can reduce the environmental pollution problem caused by piling of the blast furnace slag and the fly ash, and also can effectively prevent the leaching behavior of chromium ions in the chromium slag.

Description

technical field [0001] The invention belongs to the field of slag harmless treatment, and in particular relates to a chrome slag solidified gelling polymer. Background technique [0002] With the acceleration of my country's industrialization process, due to the large-scale use of heavy metals, the fields of chemical industry, equipment manufacturing industry and metal products industry have been vigorously developed. Among them, metal chromium is widely used in many industries due to its better economic cost and its unique properties. Chromium most commonly exists in the form of trivalent and hexavalent in the natural environment, of which trivalent chromium is usually in the form of Cr 3+ form, while hexavalent chromium usually exists as and Plasma form exists. Chromium slag is an industrial solid waste produced during the production of metal chromium and chromium salts in the chemical and metallurgical departments. It is made by adding soda ash, dolomite and limesto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B12/00
CPCY02P40/10
Inventor 李东伟黄萧黄涛
Owner 沃德费默循环经济科技发展(北京)有限公司
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