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Method for simultaneously preparing poly aluminum-ferric-silicate flocculant and low silicon X type molecular sieve

A technology of polyaluminum iron silicate and flocculant, which is applied in the direction of aluminum silicate, octahedral crystalline aluminum silicate zeolite, silicate, etc., and can solve the problems of secondary pollution of the environment

Inactive Publication Date: 2012-05-16
HUAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the specific production process, coal gangue cannot be completely converted into polymer inorganic flocculants, and the remaining residues can still cause secondary pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] 100 kg of coal gangue was crushed and sieved, 3 kg of sodium chloride and 3 kg of ferric oxide were added, and the mixture was roasted at 880°C for 2.5 hours, then cooled to room temperature naturally after heating was stopped.

[0014] Put the roasted product into the mixed acid solution of 750 liters of 10% hydrochloric acid solution and 50 liters of concentrated sulfuric acid solution, heat up to 90°C, reflux and stir for 2.5 hours, filter while it is hot, wash the residue with 90°C hot water, and keep the filtrate. The obtained residue was dried at above 80°C for 4 hours.

[0015] Put the residue into 320 liters of 30% sodium hydroxide solution, raise the temperature to 110°C, stir and react for 2.5 hours, filter while hot, wash the residue with 90°C hot water, and keep the filtrate. The obtained residue is dried at 80°C for at least 3 hours, and after being ground through a 200-mesh sieve, it becomes a low-silicon X-type molecular sieve.

[0016] Stir continuously...

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Abstract

The invention relates to the field of regeneration and reuse of waste resources and preparation of inorganic polymer compounds, specifically to a method for simultaneously preparing an inorganic polymer flocculant and a low silicon X type molecular sieve by using coal gangue as main materials. By the method, the coal gangue is pre-treated through a ferric fluxing agent so that the kaolinite mineral is decomposed to metakaolinite with high activity and at the same time, the ferric content is improved. At the time of preparing the poly aluminum-ferric-silicate flocculant, the remaining residues are converted to the low silicon X type molecular sieve to make full use of effective components in the coal gangue so as to reduce pollution.

Description

technical field [0001] The invention relates to the fields of renewable utilization of waste resources and preparation of inorganic polymer compounds, in particular to a method for simultaneously preparing an inorganic polymer flocculant and a low-silicon X-type molecular sieve using coal gangue as a main raw material. Background technique [0002] Coal gangue is a rock with a carbon content much lower than that of coal and harder than coal formed in the coal seam during the formation of coal. Coal gangue accounts for about 15% of coal production in the coal mining process. It contains coal, carbonaceous shale, argillaceous shale and sandstone and other main components. Generally, people regard it as coal mining, cleaning and processing. of impurity waste. At present, if it is calculated according to the annual production of about 1 billion tons of raw coal in my country, more than 100 million tons of coal gangue waste will be produced in the process of coal production each...

Claims

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Application Information

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IPC IPC(8): C01B33/26C01B39/22B09B3/00
Inventor 赵星郭红彦田冬胡友彪
Owner HUAINAN NORMAL UNIV