Process for recycling red mud dealkalization waste liquid and support equipment of process

A technology of reuse and dealkalization, applied in sludge treatment, solid waste management, metallurgical wastewater treatment, etc., can solve the problems of difficult recovery of dealkalized waste liquid and high treatment cost, and achieve the reduction of land occupation cost, reasonable layout, and realization of The effect of recycling

Pending Publication Date: 2018-11-06
河南建筑材料研究设计院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a process for reusing red mud dealkalization waste liquid, which can solve the problems of

Method used

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  • Process for recycling red mud dealkalization waste liquid and support equipment of process

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Effect test

Embodiment 1

[0029] A red mud dealkalization waste liquid reuse equipment, such as figure 1As shown, it includes a dealkalization device 3, a filter press 4, a dealkalization red mud storage device 5, a brick making mixer 7, a brick making device 10, a dealkalization waste liquid storage device 6 and a curing shed 12, and the dealkalization device 3 includes The dealkalization reaction kettle 3-1 and the temperature control agitator 3-2 are arranged in the dealkalization reaction kettle 3-1, and the dealkalization reaction kettle 3-1 is provided with red mud quantitative feeding port 1, dealkalization agent and water The quantitative feeding port 2; the discharge port 3-3 of the dealkalization device 3 is arranged at the bottom of the dealkalization reaction kettle 3-1.

[0030] The filter press 4 comprises a mud inlet 4-1, a filter cake outlet 4-2 and a filtrate outlet 4-3, and the outlet 3-3 of the dealkalization device 3 is connected to the mud inlet 4-1 of the filter press 4, and the ...

Embodiment 2

[0035] A red mud dealkalization waste liquid reuse process, utilizing the equipment in embodiment 1 to perform, the steps include:

[0036] (1) Add water and dealkalization agent to the red mud for dealkalization treatment of red mud: send water and dealkalizer lime according to the mass ratio of 20:1 from the quantitative feeding port 2 of dealkalizer and water into the dealkalization reaction kettle 3-1 in the dealkalization device 3, at the same time, the sintered red mud is sent into the dealkalization reaction kettle 3-1 through the red mud quantitative feeding port 1, wherein the weight of water is added It is 4 times the total weight of red mud and lime; water, lime and sintered red mud are reacted for 12 hours under the agitation of the temperature-controlled stirrer 3-2 in the dealkalization reactor 3-1, and the reaction temperature is 75°C. After the dealkalization treatment, the reactant is discharged from the outlet 3-3 located at the bottom of the dealkalization r...

Embodiment 3

[0044] A red mud dealkalization waste liquid reuse process, utilizing the equipment in embodiment 1 to perform, the steps include:

[0045] (1) Add water and dealkalization agent to the red mud for dealkalization treatment of red mud: send water and dealkalizer lime according to the mass ratio of 20:1 from the quantitative feeding port 2 of dealkalizer and water into the dealkalization reaction kettle 3-1 in the dealkalization device 3, at the same time, the sintered red mud is sent into the dealkalization reaction kettle 3-1 through the red mud quantitative feeding port 1, wherein the weight of water is added It is 3.33 times of the total weight of red mud and lime; water, lime and sintered red mud are reacted for 12 hours under the agitation of temperature-controlled agitator 3-2 in dealkalization reactor 3-1, and the reaction temperature is 80°C. After the dealkalization treatment, the reactant is discharged from the outlet 3-3 located at the bottom of the dealkalization re...

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Abstract

The invention discloses a process for recycling red mud dealkalization waste liquid and support equipment of the process. The process concretely comprises the following steps: (1) adding a dealkalization agent and water to carry out dealkalization treatment on red mud, and then performing solid-liquid separation, wherein a separated liquid phase is dealkalization waste liquid, and a separated solid phase is dealkalization red mud; (2) sending the dealkalization red mud into a baking-free brick preparation process to prepare an adobe, carrying out evaporation and concentration on the dealkalization waste liquid, and maintaining the adobe by utilizing steam generated by evaporation and concentration of the dealkalization waste liquid. The support equipment comprises a dealkalization device,a filter press, a dealkalization red mud storage device, a dealkalization waste liquid storage device, a brick making stirrer, a brick making device, a concentration waste liquid temporary storage device, a concentration waste liquid collection device and a maintenance shed, by mutual synergism among various devices, the processes for preparing the baking-free brick through dealkalizing red mud and recycling the dealkalization waste liquid are completed, the cyclic utilization of the dealkalization waste liquid is realized, the resources are saved, and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a process for reusing red mud dealkalization waste liquid and its supporting equipment. Background technique [0002] my country is rich in bauxite resources and is also a major producer of alumina. According to data released by the National Bureau of Statistics, my country's annual alumina output reached 60.906 million tons in 2016. At this stage, the main processes of alumina production in my country are Bayer method, sintering method and combined method. For every 1t of alumina produced by these methods, 1t to 1.5t of red mud will be produced. As early as 2012, the cumulative amount of red mud piled up in my country has reached 400 million tons. As a kind of industrial solid waste, red mud is piled up in large quantities and has not been fully utilized. At this stage, the comprehensive utilization rate of red mud in my country is only about ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F1/04C04B18/04C04B28/26C04B40/02C02F103/16
CPCC02F1/04C02F11/00C04B18/0409C04B28/26C04B2111/00017C04B2201/50C02F2103/16C04B22/0013C04B18/08C04B18/141C04B14/06C04B22/143C04B2103/0068C04B40/024Y02W30/91
Inventor 李建伟张茂亮杨艳娟马炎徐元盛王今华万欣娣马挺张春光单雪强殷会玲李国旺刘亚东
Owner 河南建筑材料研究设计院有限责任公司
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