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Method for preparing yellow loam parent material from sludge after neutralization of iron and steel pickling wastewater

A technology of pickling yellow loam parent material and steel, applied in chemical instruments and methods, water/sludge/sewage treatment, sludge treatment, etc., can solve the problem of low iron content in sludge, no use value, and economic burden of treatment costs for enterprises , soil and earth environmental pollution and other issues, to achieve the effect of wide range of uses, convenient operation and large usage

Inactive Publication Date: 2018-05-08
卢玉柱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the iron content in sludge is very low and has no use value, some enterprises use landfill treatment for sludge
The heavy metal hydroxides in the sludge are accumulated in the soil after being landfilled and are difficult to remove, which will inevitably deteriorate the soil and pose a serious threat to the safety of the biological chain, causing pollution and damage to the soil and the earth's environment
At present, the current treatment method is through professional treatment manufacturers, but the high treatment costs bring serious economic burdens to enterprises, and landfilling will cause serious pollution problems to the environment

Method used

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  • Method for preparing yellow loam parent material from sludge after neutralization of iron and steel pickling wastewater
  • Method for preparing yellow loam parent material from sludge after neutralization of iron and steel pickling wastewater
  • Method for preparing yellow loam parent material from sludge after neutralization of iron and steel pickling wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing yellow loam parent material from neutralized sludge from iron and steel pickling wastewater. The preparation process is as follows: iron and steel pickling wastewater is pumped into a pipeline mixer with an acid-resistant pump, lime slurry is added and the amount of lime slurry is adjusted for mixing, mixing After pressure filtration, sludge filter cake is obtained after pressure filtration, and weathered coal containing humic acid is added to the sludge filter cake under stirring. The mass ratio of sludge to weathered coal is 5:1-2, and pulverized coal is added after stirring evenly Ash, the mass ratio of sludge to fly ash is 10:1-3, and made into mud pellets to obtain the parent material of artificial iron oxide-based yellow loam.

[0031] The specific operation implementation process of this embodiment:

[0032] Put 100 cubic meters of pickling waste water into the pipeline mixer with an acid-resistant pump, add lime slurry to neutralize acid a...

Embodiment 2

[0035] A method for preparing yellow loam parent material from neutralized sludge from iron and steel pickling wastewater, the preparation process of which is the same as in Example 1. Among them, 100 cubic meters of pickling waste water is pumped into the pipeline mixer with an acid-resistant pump, and white mortar is added to neutralize the acid and alkali to adjust the mortar intake to make the pH value of the mixer outlet to 6.5. Use a mortar pump to drive into a box-type filter press to maintain a pressure of 0.4-0.6MPa for pressure filtration, and the water content of the sludge filter cake after pressure filtration is 45-65%. Obtain 20 cubic meters of ferrous hydroxide sludge that has not been oxidized. Use a forklift to shovel the sludge into 1.5 cubic meters and weigh it according to the weight ratio of mud to weathered coal 10:3. Add it to the cement mixer and stir to make the sludge and air-dried coal fully mixed, and then according to the ratio of sludge to pulveri...

Embodiment 3

[0037] The use of sludge after neutralization of iron and steel pickling wastewater to prepare yellow loam parent material, the yellow loam parent material is used as a heavy metal adsorbent for removing copper or zinc in copper or zinc-containing heavy metal wastewater. When removing copper or zinc in heavy metal wastewater containing copper or zinc, add the yellow loam parent material mud mass particles to the heavy metal wastewater containing copper and zinc, adjust the pH to 6.5-7 with white ash, and settle for 3-6 hours to absorb heavy metals. Sewage environmental protection discharge.

[0038]Use of sludge after neutralization of iron and steel pickling wastewater to prepare yellow loam parent material. Add 200 kilograms of the artificial yellow loam mud mass particles prepared in Example 1 into 30 cubic meters of copper-zinc-containing wastewater from the musical instrument workshop, and pneumatically stir it with lime to adjust the pH to 6.5-7. After static precipitati...

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Abstract

The invention relates to a method for preparing yellow loam parent material from sludge after neutralization of iron and steel pickling wastewater. The invention belongs to the technical field of wastewater treatment of iron and steel pickling wastewater. The method for preparing yellow loam parent material from sludge after neutralization of iron and steel pickling wastewater is characterized in that: iron and steel pickling wastewater is poured into a pipeline mixer, and white mortar is added to adjust the mortar for mixing. Add weathered coal containing humic acid, the mass ratio of sludge to weathered coal is 5:1-2, stir evenly and add fly ash, the mass ratio of sludge to fly ash is 10:1-3, and make mud The artificial iron oxide-based yellow loam parent material was obtained from the pellets. The purpose of preparing yellow loam parent material from the neutralized sludge of iron and steel pickling wastewater, the yellow loam parent material is used as a heavy metal adsorbent and gas desulfurizer, the yellow loam parent material is used as Hijri backfill soil for construction projects, and the yellow loam parent material is used as a soil conditioner. The invention has the advantages of simple process, convenient operation, easy control, low processing cost, wide application, large usage, turning waste into treasure, and the like.

Description

technical field [0001] The invention belongs to the technical field of iron and steel pickling wastewater treatment, in particular to a method for preparing yellow loam parent material from sludge after neutralization of iron and steel pickling wastewater and its application. Background technique [0002] At present, a large amount of rinsing wastewater is produced in the pickling process of iron and steel processing enterprises, and the main component of the wastewater is FeCl with an acidic pH value ≤ 2 2 or FeS0 4 When the wastewater is in contact with the air in nature, it is oxidized by the air to form a red precipitate of trivalent iron oxide, causing the water to be turbid and polluting the water source. [0003] In the sewage treatment process of pickling wastewater in iron and steel pickling enterprises, the low-cost alkaline treatment agent lime (calcium oxide) is generally used to neutralize the acid-containing wastewater. The treatment process is to dissolve the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C04B30/00C04B18/04C02F1/28C02F1/62B01D53/81B01D53/52C09K17/02
CPCY02W30/91
Inventor 卢玉柱
Owner 卢玉柱
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