Method for preparing polymeric aluminum ferric sulfate by using aluminium ore washing gangue

A technology for polymerizing ferric aluminum sulfate and aluminum sulfate, which is applied in the fields of ferric sulfate, flocculation/precipitation water/sewage treatment, etc. It can solve the problems of low degree of polymerization, low product yield, and source limitation, and achieve reduced production costs and efficient circulation Economical and good product quality

Inactive Publication Date: 2011-02-16
广西天工冶金科技有限公司
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Problems solved by technology

This patent has the following deficiencies: (1) Due to the different places of origin of pyrite, the contents of iron and aluminum in the slag are different, so that the contents of iron sulfate and aluminum sulfate in the final product polyaluminum ferric sulfate cannot be adjusted, and the product cannot be adapted to market needs (2) the waste residue is not broken and only utilizes the dilution heat release of sulfuric acid to maintain the reaction, and the reaction is not thorough; (3) the natural sedimentation of the flocculant is used for thr

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  • Method for preparing polymeric aluminum ferric sulfate by using aluminium ore washing gangue
  • Method for preparing polymeric aluminum ferric sulfate by using aluminium ore washing gangue

Examples

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Example Embodiment

[0048] Example 1:

[0049] First add water, tailings, sulfuric acid and hydrogen peroxide in a ratio of 3.7:1:1.85:0.025 by weight of the raw materials into the reaction kettle, heat to 150℃, start stirring for the thick slurry acid leaching reaction, thick slurry acid leaching Time 41 minutes, control Al 2 O 3 The leaching rate is 72%, Fe 2 O 3 The leaching rate is 90%; 3 parts by weight of water is added to the acid leaching solution, the temperature is lowered to 80° C., and the acid leaching reaction is continued for 4 hours. After the acid leaching reaction is completed, use a ceramic filter to filter to obtain an aqueous solution of aluminum sulfate and iron sulfate, and the filter residue is used as a cement filler; the aqueous solution of aluminum sulfate and iron sulfate is concentrated, and when the liquid concentration reaches 40 Baume, it will be added The weight ratio is: leachate: sodium bicarbonate = 1:0.15 alkalizing agent for polymerization, the polymerization st...

Example Embodiment

[0050] Example 2:

[0051] First add water, sludge (tailings), sulfuric acid and hydrogen peroxide in a ratio of 3.7:1:1:1.85:0.025 by weight of raw materials into the reaction kettle, heat it to 148°C, start stirring for acid leaching reaction of thick slurry, Thick slurry acid leaching time 40 minutes, control Al 2 O 3 The leaching rate is 75%, Fe 2 O 3 The leaching rate is 92%; the acid leaching solution is added with 3.2 parts by weight of water, and the temperature is lowered to 79° C. and the acid leaching reaction is continued for 4 hours. After the acid leaching reaction is completed, use a ceramic filter to filter to obtain an aqueous solution of aluminum sulfate and iron sulfate, and the filter residue is used as a cement filler; the aqueous solution of aluminum sulfate and iron sulfate is concentrated, and when the liquid concentration reaches 40 Baume, it will be added The weight ratio is: leachate: sodium carbonate=1:0.15 alkalizing agent for polymerization, the poly...

Example Embodiment

[0052] Example 3:

[0053] First add water, sludge (tailings), sulfuric acid and hydrogen peroxide in a ratio of 3.7:1:2.78:0.025 by weight of the raw materials into the reaction kettle, heat it to 146°C, start stirring to carry out the thick slurry acid leaching reaction, Add after 20 minutes of acid leaching reaction: 1.5 parts by weight of high-speed iron slag iron powder, warm to 150°C and continue to react for 22 minutes to control Al 2 O 3 The leaching rate is 75%, Fe 2 O 3 The leaching rate is 94%; the acid leaching solution is supplemented with 3.5 parts by weight of water, the temperature is lowered to 80° C., and the acid leaching reaction is continued for 4 hours. After the acid leaching reaction is completed, use a ceramic filter to filter to obtain an aqueous solution of aluminum sulfate and iron sulfate, and the filter residue is used as a cement filler; the aqueous solution of aluminum sulfate and iron sulfate is concentrated, and when the liquid concentration reach...

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Abstract

The invention discloses a method for preparing polymeric aluminum ferric sulfate by using aluminium ore washing gangue, which is characterized in that washing gangue or/and brasses of a karst accumulated aluminium ore or other aluminium ores is or are used for preparing high-iron pyritic residue iron powder which reacts with sulfuric acid to generate aluminum sulfate and ferric sulfate water solutions, and then an alkalizer is added for polymerizing to produce the polymeric aluminum ferric sulfate. Meanwhile, the gangue has thinnest granularity, wherein the content of fine silt with the granularity of -10 micrometers accounts for 80 percent, and the fine silt is the optimal raw material for producing the polymeric aluminum ferric sulfate, and has the advantages of high reaction ratio and good product quality. The invention has the advantages of being capable of reasonably and effectively utilizing aluminium ore resources, effectively controlling the aluminium ore washing gangue from a pollution source, protecting the environment, realizing the harmony of human beings and the environment, lowering the production cost of the polymeric aluminum ferric sulfate and realizing high-efficiency recycling economy.

Description

technical field [0001] The invention belongs to the technical field of tailings treatment and water treatment chemicals, and relates to a method for preparing polyaluminium-ferric sulfate by washing tailings with aluminum ore. Background technique [0002] At present, my country is rich in aluminum ore resources. While obtaining high-quality metal aluminum, a large amount of waste slag and waste mud are produced, especially the tailings are difficult to settle naturally in a natural state, and it is extremely difficult to stockpile. As far as Pingguo Aluminum, one of the main aluminum production bases in my country, produces about 2 million tons of tailings every year, the Baise area where Pingguo Aluminum is located is dominated by karst landforms, and various karst structures are available in the mining area. Gully melting tanks are criss-crossed, and the discharged slime forms a slime reservoir, which has a great impact on the surrounding environment and has great potentia...

Claims

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Application Information

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IPC IPC(8): C02F1/52C01G49/14
Inventor 杨文邓海波陈剑锋吴承桧林凯平徐刚罗桂民
Owner 广西天工冶金科技有限公司
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