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A kind of method that utilizes iron tailings to produce polyaluminum ferric sulfate water purifying agent and silica gel

A technology for polymerizing aluminum sulfate and iron water purifier, which is applied in the field of solid waste resource utilization, can solve problems such as environmental pollution, low economic value, waste of resources, etc., and achieves good controllability of process parameters, simple process, and improved The effect of utilization

Active Publication Date: 2020-11-03
北京蔚然欣科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these accumulated iron tailings contain a large amount of beneficiation agents, various trace elements and heavy metal elements, they not only occupy land, waste resources, pollute the environment, but also have great potential safety hazards. Once a dam collapse accident occurs, It will bring huge economic losses, environmental disasters and casualties
[0003] In order to solve the environmental pollution caused by iron tailings and the potential safety hazards of reservoir dams, it has been used domestically in secondary mineral processing, preparation of various building materials, and restoration and treatment of agriculture and the environment. However, iron tailings The comprehensive utilization rate is low, and the economic value generated by utilization is low
The reason is that the fundamental problem is that there is a lack of new processes and technologies for industrialized treatment of iron tailings that can produce high value-added products

Method used

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  • A kind of method that utilizes iron tailings to produce polyaluminum ferric sulfate water purifying agent and silica gel
  • A kind of method that utilizes iron tailings to produce polyaluminum ferric sulfate water purifying agent and silica gel
  • A kind of method that utilizes iron tailings to produce polyaluminum ferric sulfate water purifying agent and silica gel

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Such as figure 1 As shown, embodiment 1 provides a kind of method utilizing iron tailings to produce polyaluminum ferric sulfate water purifying agent and silica gel, comprises the following steps:

[0044] S1. Take 100g of iron tailings and 79.8g of solid sodium carbonate with a mass ratio of 1:0.798, mix the two evenly, and grind them with a grinder to obtain a particle size of 150-250 mesh (that is, a particle size of 106-58 μm) Mixed raw meal within the range; wherein, in the selected iron tailings, the main components include: 35% silica, 32% aluminum oxide, 17% aluminum oxide iron, among others.

[0045] S2. Put the mixed raw meal obtained in step S1 under the condition of normal pressure and temperature of 800° C., and roast for 40 minutes to obtain active clinker.

[0046] S3, take the 45g active clinker obtained in step S2, add 540ml of water according to the solid-to-liquid mass ratio of 1:12, mix the two evenly, and stir and dissolve at a stirring speed of 85...

Embodiment 2-8

[0059] Similar to the steps in Embodiment 1, Embodiments 2-8 are realized by adjusting the process parameter conditions of each step in steps S1-S9. The process conditions of Examples 2-8 and the quality of the polyaluminum ferric sulfate obtained are specifically shown in Table 1.

[0060] Table 1: The technological conditions of embodiment 2-8 and the quality situation of polyaluminum ferric sulfate.

[0061]

[0062]

[0063]

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Abstract

The invention discloses a method for producing a polyaluminum ferric sulfate water purifying agent and silica gel by utilizing iron tailings. The method comprises the following steps: mixing and grinding the iron tailings, sodium carbonate and a catalyst and then performing the process steps of calcination, water-soluble separation, cyclic dissolution, carbonization decomposition, acid-soluble separation, cyclic acid leaching, silica gel purification, acid leaching cyclic filtrate concentration desalination, polymerization and the like so that more than 90% of aluminum, silicon and iron in theiron tailings can be effectively activated and converted into high-added-value products such as the silica gel and the polyaluminum ferric sulfate water purifying agent, and efficient resource utilization of the iron tailings is achieved. In the whole production process, the added auxiliary agent sulfuric acid is converted into a new product, and the auxiliary agent sodium carbonate can be recycled. Compared with an existing iron tailing comprehensive utilization method, the utilization rate of the iron tailings can be greatly improved, and the method has the advantages of being simple in technological process, free of special requirements for equipment, low in energy consumption, capable of achieving industrialization easily and the like and opens up a new way for comprehensive utilization of the iron tailings.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste, in particular to a method for producing polyaluminum ferric sulfate water purifying agent and silica gel by using iron tailings produced after iron ore is produced into iron fine powder. Background technique [0002] Tailings refer to the solid waste remaining after the ore has been crushed, ground and smelted to produce a concentrate of useful components under specific economic and technical conditions. Iron tailings are the solid waste left after the iron ore is crushed, ground and smelted to produce iron concentrate in the iron and steel industry. Usually, for every ton of iron ore concentrate produced, 2.5 to 3.0 tons of iron tailings are discharged. As the world's largest crude steel producer, China discharges hundreds of millions of tons of iron tailings every year, most of which are piled up in tailings dams. Because these accumulated iron tailings contain a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/14C01B33/14C02F1/00
CPCC01B33/14C01G49/14C02F1/00
Inventor 潘爱芳马昱昭马润勇胡神涛孙悦畅捷李奎梦史国义
Owner 北京蔚然欣科技有限公司