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Preparation method of polyaluminium chloride

A technology of polyaluminum chloride and bauxite, applied in the directions of aluminum chloride, chemical instruments and methods, aluminum halide, etc., can solve the problems of air pollution, increase the cost of enterprises, etc., and achieve the effect of reducing emissions

Pending Publication Date: 2020-06-09
修文县苏达新型环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing preparation method of polyaluminum chloride is to adopt raw material grinding-calcination-hollow kiln calcination-finished product grinding-packing and leaving the factory, wherein the calcination is external combustion (calcination temperature at 1450 degrees) and the hydroxide is as high as 60% at high temperature Above, sulfur dioxide also exceeds the standard. If the sulfur dioxide produced is not treated, it will cause air pollution. If the produced sulfur dioxide is treated, it will increase the cost of the enterprise. In the process of external combustion and calcination, due to direct contact with air and sufficient oxygen, it will not Activated carbon is generated, calcium aluminate powder is polymerized with hydrochloric acid, and the dissolved liquid is yellow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of preparation method of polyaluminum chloride comprises the following steps:

[0019] Step 1. Select bauxite, high calcium stone and anthracite as raw materials, pulverize the above raw materials, mix and grind them to obtain a mixed material, process the mixed material into balls, and then put it into a high temperature zone of a rotary furnace for calcination; The calcination temperature in the rotary furnace is at least 1350°C; the rotary furnace includes a calcination zone, a high temperature zone and a mixed material zone, when the mixed material enters the high temperature zone, part of the anthracite is burned, and the activated carbon is produced under the condition of insufficient oxygen in the rotary furnace The calcination process is: when the mixed material is calcined, physical and chemical reactions occur, while sinking, and an anoxic state is set after sinking to the high temperature zone, so that the unburned anthracite in the mixed ...

Embodiment 2

[0021] Embodiment 2: a kind of preparation method of polyaluminum chloride comprises the following steps:

[0022] Step 1. Select bauxite, high calcium stone and anthracite as raw materials, pulverize the above raw materials, mix and grind them to obtain a mixed material, process the mixed material into balls, and then put it into a high temperature zone of a rotary furnace for calcination; The calcination temperature in the rotary furnace is at least 1400°C; the rotary furnace includes a calcination zone, a high temperature zone and a mixed material zone, when the mixed material enters the high temperature zone, part of the anthracite is burned out, and the activated carbon is produced under the condition of insufficient oxygen in the rotary furnace The calcination process is: when the mixed material is calcined, physical and chemical reactions occur, while sinking, and an anoxic state is set after sinking to the high temperature zone, so that the unburned anthracite in the mi...

Embodiment 3

[0024] Embodiment 3: a kind of preparation method of polyaluminum chloride comprises the following steps:

[0025] Step 1. Select bauxite, high calcium stone and anthracite as raw materials, pulverize the above raw materials, mix and grind them to obtain a mixed material, process the mixed material into balls, and then put it into a high temperature zone of a rotary furnace for calcination; The calcination temperature in the rotary furnace is at least 1400°C; the rotary furnace includes a calcination zone, a high temperature zone and a mixed material zone, when the mixed material enters the high temperature zone, part of the anthracite is burned out, and the activated carbon is produced under the condition of insufficient oxygen in the rotary furnace The calcination process is: when the mixed material is calcined, physical and chemical reactions occur, while sinking, and an anoxic state is set after sinking to the high temperature zone, so that the unburned anthracite in the mi...

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PUM

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Abstract

The invention relates to the technical field of preparation of inorganic polymer coagulants, in particular to a preparation method of polyaluminum chloride. The preparation method comprises the following steps: selecting bauxite, high-calcium stone and anthracite as raw materials, crushing the raw materials, and carrying out mixing and grinding to obtain a mixed material; balling the mixed material; calcining the balled material in a high-temperature area of a rotary furnace, wherein a calcination temperature in the rotary furnace is at least 1350 DEG C, the rotary furnace comprises a calcining area, the high-temperature area and a mixed material area, and when the mixed material enters the high-temperature area, a part of the anthracite is burnt out and activated carbon is produced underthe condition that oxygen in the rotary furnace is insufficient; and carrying out a polymerization reaction on the calcined material and hydrochloric acid to obtain a yellow liquid-polyaluminum chloride solution, and adsorbing a color in the yellow liquid-polyaluminum chloride solution by using activated carbon in the process of polymerization to obtain a white liquid-polyaluminum chloride solution. According to the method, environmental pollution and enterprise production cost are reduced, and the produced polyaluminum chloride is white.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic polymer coagulants, in particular to a preparation method of polyaluminum chloride. Background technique [0002] Polyaluminum chloride is a water purification material, inorganic polymer coagulant, also referred to as polyaluminum, English abbreviation is PAC, the molecular weight produced due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions Larger, higher charge inorganic polymer water treatment agent. It can be divided into solid and liquid in form. The solid can be divided into brown, beige, golden yellow and white according to different colors, and the liquid can be colorless and transparent, slightly yellow, light yellow to yellowish brown. Polyaluminum chloride of different colors is also quite different in application and production technology. [0003] The existing preparation method of polyaluminum chloride is to adopt raw material ...

Claims

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Application Information

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IPC IPC(8): C01F7/56C02F1/52
CPCC01F7/56C02F1/5245
Inventor 余海平
Owner 修文县苏达新型环保材料有限公司
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