Complexing agent

A compounding agent and concentration technology, applied in water/sludge/sewage treatment, chemical instruments and methods, descaling and water softening, etc. Scale inhibition and dispersion, good synergistic effect

Active Publication Date: 2014-06-11
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Molten steel slag hot stuffy treatment water circulation system, due to the large amount of evaporation of water in the steel slag hot stuffy process, the digestion and reaction of free calcium oxide in the steel slag enters the circulating water, resulting in the "high water temperature, high hardness, high alkalinity, high pH" of the steel slag hot stuffy water "Characteristics, the system is prone to fouling
During the operation of the current circulating water system, the nozzles on the water delivery pumps, water delivery pipes and hot stuffy covers will be blocked due to fouling, thus affecting normal production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Compound composition: 25 grams of polyepoxysuccinic acid, 25 grams of 2-phosphonic acid group-1,2,4-tricarboxylic acid butane, 15 grams of acrylic acid / maleic acid copolymer, and 35 grams of water. Steel slag hot stuffy circulating water water quality: calcium hardness: 740mg / L (calculated as calcium carbonate); pH value: 12; total alkali: 800mg / L (calculated as calcium carbonate); soluble silicate: 134mg / L.

[0016] The above-mentioned composite agent and water quality were used to conduct static calcium carbonate scale inhibition experiments according to GB / T16632-2008 "Determination of Scale Inhibition Performance of Water Treatment Agents-Calcium Carbonate Deposition Method". The results are shown in Table 1.

Embodiment 2

[0018] Compound composition: 25 grams of polyaspartic acid, 35 grams of 2-phosphonic acid group-1,2,4-tricarboxylic acid butane, 10 grams of acrylic acid / hydroxyethyl methacrylate / methyl acrylate copolymer, two 3 grams of methyl formamide, 27 grams of water.

[0019] Steel slag hot stuffy circulating water water quality: calcium hardness: 740mg / L (calculated as calcium carbonate); pH value: 12; total alkali: 800mg / L (calculated as calcium carbonate); soluble silicate: 134mg / L.

[0020] The above-mentioned composite agent and water quality were used to conduct static calcium carbonate scale inhibition experiments according to GB / T16632-2008 "Determination of Scale Inhibition Performance of Water Treatment Agents-Calcium Carbonate Deposition Method". The results are shown in Table 1.

Embodiment 3

[0022] Compound composition: 25 grams of polyepoxysuccinic acid, 15 grams of N, N, N-trimethylene triphosphonic acid-ethylenediamine-N-hydroxypropanesulfonic acid, 15 grams of polyether polyaminomethylene phosphonate N-oxide, 20 g acrylic acid / itaconic acid copolymer, - water 25 g.

[0023] Steel slag hot stuffy circulating water water quality: calcium hardness: 740mg / L (calculated as calcium carbonate); pH value: 12; total alkali: 800mg / L (calculated as calcium carbonate); soluble silicate: 134mg / L.

[0024] The above-mentioned composite agent and water quality were used to conduct static calcium carbonate scale inhibition experiments according to GB / T16632-2008 "Determination of Scale Inhibition Performance of Water Treatment Agents-Calcium Carbonate Deposition Method". The results are shown in Table 1.

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Abstract

The invention relates to a complexing agent. The complexing agent comprises the following components in percentage by weight: 1 to 35 percent of scale inhibitor, 1 to 35 percent of organic phosphinocarboxylic acid or organic phosphinosulfonic acid, 1 to 25 percent of acrylic acid copolymer and 30 to 80 percent of water. The complexing agent is environment-friendly, has low phosphorus content, is particularly suitable for treating cooling water under the conditions of high alkalinity, high salt content, high hardness, a high pH value and high temperature, and can effectively solve the problem of scale formation of a steel slag hot closed circulating water system.

Description

technical field [0001] The invention relates to a treatment technology for stable water quality of molten steel slag hot stuffy circulating water in the smelting industry, in particular a composite agent suitable for treating steel slag hot stuffy circulating water with high pH value, high salt content, high hardness and high temperature. Background technique [0002] The iron and steel industry is one of the industries that consume the most resources and energy, and a large amount of steel slag is bound to be produced during the smelting process. About 0.34 tons of blast furnace slag is produced for every ton of iron smelted, and about 0.12 tons of steel slag is produced for every ton of steel smelted. With the rapid development of the steel industry, the amount of steel slag has increased accordingly, and the "zero discharge" of steel slag has become an important issue for the steel industry to take the road of circular economy and achieve sustainable development. In rece...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/14C02F5/10
Inventor 李红王海东高康乐程小鸥邱鹏
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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