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Special synthesis process of poly ferrum aluminium silicate

A technology of polyaluminum ferric silicate and synthesis process, which is applied in aluminum silicate, silicate, flocculation/sedimentation water/sewage treatment, etc., can solve the problem that polyaluminum ferric silicate is not easy to preserve, the cost of wastewater treatment is high, and the synthesis time is high. It can shorten the synthesis time, reduce the production cost and waste water treatment cost, and prolong the storage time.

Inactive Publication Date: 2005-03-16
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing synthesis process of polyaluminum iron silicate includes the preparation of polymerized aluminum iron, the preparation of polymerized silicic acid and the preparation of polyaluminum iron silicate; the synthesis time of this synthesis process is long, and the prepared polyaluminum iron silicate is not easy to preserve , usually at room temperature, open storage can only keep about seven days without condensation, and airtight storage can only keep about half a month without condensation. More importantly, the raw materials used in the synthesis process include sodium silicate, aluminum sulfate, Ferric sulfate, ammonia water and sulfuric acid are costly raw materials. Currently, in the application of wastewater treatment and hard water softening in power plants, the amount of polyaluminum iron silicate is as many as several million tons, so the cost of wastewater treatment is too high

Method used

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Embodiment 1

[0007] Embodiment 1: a kind of special synthetic process of polyaluminum iron silicate, including the preparation of polyaluminium iron, the preparation of polymerized silicic acid and the preparation of polyaluminum iron silicate; (1) raw material selection: used raw material and weight percentage thereof are : Fe 2 o 3 Ironmaking slag with a content of 40% 20%, Fe 2 o 3 The content is 4%, Al 2 o 3 Content is 20%, SiO 2 80% of fly ash with a content of 40%; (2) roasting of fly ash: place fly ash in a high-temperature furnace and roast for 4 hours at 800°C; (3) fly ash after roasting Treatment: the roasted fly ash is placed in 350% of the total weight of the unroasted fly ash, consisting of 15% HCl and 25% H 2 SO 4 Composed of mixed acids with a configuration ratio of 50%, soak for 1.5 hours at 80°C for 1.5 hours, then filter, take the filtrate for later use, and analyze and calculate the Al in the filtrate by conventional methods 3+ and Fe 2+ The content of the filte...

Embodiment 2

[0008] Embodiment 2: a kind of special synthesis process of polyaluminum iron silicate, including the preparation of polyaluminium iron, the preparation of polymerized silicic acid and the preparation of polyaluminum iron silicate; (1) raw material selection: used raw material and its weight percentage are : Fe 2 o 3 Ironmaking slag with a content of 50% 40%, Fe 2 o 3 Content is 10%, Al 2 o 3 Content is 30%, SiO 2 Content is 60% of fly ash 60%; (2) roasting of fly ash: put fly ash in high temperature furnace, under the condition of 850 ℃, roast for 12 hours; (3) fly ash after roasting Treatment: the roasted fly ash is placed in 400% of the total weight of the unroasted fly ash, which is composed of 15% HCl and 25% H 2 SO 4 Composed of mixed acids with a configuration ratio of 50%, soak for 2 hours at 90°C, then filter, take the filtrate for later use, and analyze and calculate the Al in the filtrate by conventional methods 3+ and Fe 2+ (4) filter residue treatment: th...

Embodiment 3

[0009] Embodiment 3: A kind of special synthetic technique of polyaluminum iron silicate, including the preparation of polyaluminum iron, the preparation of polymerized silicic acid and the preparation of polyaluminum iron silicate; (1) raw material selection: used raw material and its weight percentage are : Fe 2 o 3 Ironmaking slag with a content of 45% 30%, Fe 2 o 3 The content is 7%, Al 2 o 3 The content is 25%, SiO 2 70% of fly ash with a content of 50%; (2) roasting of fly ash: place fly ash in a high-temperature furnace and roast for 8 hours at 825°C; (3) fly ash after roasting Treatment: the roasted fly ash is placed in 355% of the total weight of the unroasted fly ash, consisting of 15% HCl and 25% H 2 SO 4 In a mixed acid with a proportion of 50% each, soak for 1.5 hours at 85°C, then filter, take the filtrate for later use, and analyze and calculate the Al in the filtrate by conventional methods 3+ and Fe 2+ (4) filter residue treatment: the dried filter re...

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Abstract

The invention discloses a special synthesis process of poly ferrum aluminium silicate which comprises the steps of raw material selection, pulverized coal ash sintering, sintered coal ash handling, filtering sediment treatment, treatment of pickle liquor for iron-making waste slag, preparation of polymerized aluminum-ferrum, preparation of polymeric silicon acid and polyaluminum-ferric-silicate. The process can greatly shorten synthesizing time for finished product, and lower the fabrication cost and waste water treatment cost.

Description

technical field [0001] The invention relates to a synthesis process of a flocculant, in particular to a special synthesis process of polyaluminum iron silicate. Background technique [0002] The existing synthesis process of polyaluminum iron silicate includes the preparation of polymerized aluminum iron, the preparation of polymerized silicic acid and the preparation of polyaluminum iron silicate; the synthesis time of this synthesis process is long, and the prepared polyaluminum iron silicate is not easy to preserve , usually at room temperature, open storage can only keep about seven days without condensation, and airtight storage can only keep about half a month without condensation. More importantly, the raw materials used in the synthesis process include sodium silicate, aluminum sulfate, Ferric sulfate, ammonia water and sulfuric acid are costly raw materials. Currently, in the application of wastewater treatment and hard water softening in power plants, the amount of...

Claims

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Application Information

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IPC IPC(8): C01B33/26C02F1/52
Inventor 朱开金李敏薛笑莉张翠梅牛宇岚
Owner TAIYUAN INST OF TECH
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