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A method for co-processing fluorine-containing inorganic compounds in cement kilns

A technology of co-processing of inorganic compounds, applied in the direction of silicon organic compounds, organic chemical methods, chemical instruments and methods, etc., can solve problems such as secondary pollution of fluoride smoke, energy consumption, public safety accidents, etc.

Active Publication Date: 2022-04-19
浙江红狮环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Landfill is currently the main method for dealing with fluorine-containing solid waste, but it will gradually withdraw from the market under the current situation of increasingly stringent environmental supervision and increasingly precious land resources; the method of incineration to treat fluorine-containing inorganic compounds will not only consume a lot of energy, but also cause Secondary pollution of fluoride fumes, causing public safety accidents

Method used

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  • A method for co-processing fluorine-containing inorganic compounds in cement kilns
  • A method for co-processing fluorine-containing inorganic compounds in cement kilns
  • A method for co-processing fluorine-containing inorganic compounds in cement kilns

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Embodiment 1

[0030] A method for co-processing fluorine-containing inorganic compounds in a cement kiln, the scheme of which is:

[0031] Step 1. Preparation of fluorine decomposition curing agent: 23kg of NdFeB waste, 32kg of vanadium-containing titanium slag, 5kg of iron-doped titanium dioxide, 18kg of electrolytic manganese-containing waste, 8kg of blast furnace slag, and 2kg of molten copper slag Put it into a grinder and grind it into 80-mesh powder; then add the powder to 300kg of an acidic solution with a molar concentration of 0.5mol / L and mix evenly, then put the material into a ball mill, ball mill for 2 hours, and then filter and separate to obtain activated slag powder; then join in the soda lime of 1500kg, after stirring and mixing uniformly, described fluorine decomposition curing agent can be obtained;

[0032] Step 2. Co-processing: Mix 100kg of fluorine-containing inorganic compound and 30kg of fluorine decomposition curing agent to obtain a mixed material, send the mixed ...

Embodiment 2

[0043] A method for co-processing fluorine-containing inorganic compounds in a cement kiln, the scheme of which is:

[0044] Step 1. Preparation of fluorine decomposition curing agent: 36kg of NdFeB waste, 48kg of vanadium-containing titanium slag, 10kg of iron-doped titanium dioxide, 23kg of electrolytic manganese-containing waste, 16kg of blast furnace slag, and 5kg of molten copper slag Put it into a grinder and grind it into a 120-mesh powder; then add the powder to 350kg of an acidic solution with a molar concentration of 2.3mol / L and mix evenly, then put the material into a ball mill, and filter and separate after ball milling for 4 hours to obtain activated slag powder; then join in the soda lime of 2200kg, after stirring and mixing uniformly, described fluorine decomposition curing agent can be obtained;

[0045] Step 2. Co-processing: Mix 140kg of fluorine-containing inorganic compound and 50kg of fluorine decomposition curing agent to obtain a mixed material, send th...

Embodiment 3

[0056] A method for co-processing fluorine-containing inorganic compounds in a cement kiln, the scheme of which is:

[0057] Step 1. Preparation of fluorine decomposition solidifying agent: 48kg of NdFeB waste, 64kg of vanadium-containing titanium slag, 15kg of iron-doped titanium dioxide, 28kg of electrolytic manganese-containing waste, 24kg of blast furnace slag, and 8kg of molten copper slag Put it into a grinder and grind it into a 160-mesh powder; then add the powder to 400kg of an acidic solution with a molar concentration of 4mol / L and mix evenly, then put the material into a ball mill, and filter and separate after ball milling for 5 hours to obtain activated slag powder Then join in the soda lime of 2800kg, after stirring and mixing uniformly, described fluorine decomposition curing agent can be obtained;

[0058] Step 2. Co-processing: mix 180kg of fluorine-containing inorganic compound with 80kg of fluorine decomposition curing agent to obtain a mixed material, send...

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Abstract

The invention relates to the field of waste treatment. The invention discloses a method for co-processing fluorine-containing inorganic compounds in cement kilns, including: preparation of fluorine decomposition and curing agent, co-processing and treatment; the invention can fully decompose fluorine-containing inorganic compounds The organic fluorine-containing compounds are decomposed completely, and the fluorine element is completely fixed in the solid material, there is no generation of fluoride smoke, and there is no need to worry about secondary pollution; the method of the present invention fully combines the characteristics of high residual heat of cement kilns, and fully utilizes the All fluorine-containing inorganic compounds are harmlessly treated by the residual heat, and the residual inorganic waste residue is used as raw materials for cement kilns for secondary use, which is in line with the current development trend of circular economy and green economy.

Description

technical field [0001] The invention relates to the field of waste treatment, in particular to a method for co-processing fluorine-containing inorganic compounds in cement kilns. Background technique [0002] Fluorine and its inorganic compounds are widely used in the chemical industry to manufacture drugs, pesticides, refrigerants, wood preservatives, organic reaction catalysts, fluoroplastics and fluororubbers, etc.; fluorine and most inorganic fluorides are primary irritants and are harmful to the skin. , Respiratory tract and gastrointestinal mucosa have different degrees of stimulation. [0003] CN102897829B Process for producing potassium fluorotitanate by environmentally friendly treatment of waste containing fluorine and potassium. The fluorine-containing waste liquid and potassium liquid are stirred with a theoretical amount of titanium ore to prepare ferric fluorotitanate slurry; potassium-containing waste slag or waste hydraulic pressure is filtered and cleaned L...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/38B09B3/40B09B3/20C07F7/08
CPCC04B7/38C07F7/0836C07B2200/11
Inventor 李春萍戴天昊张衡赵万仪叶维佳
Owner 浙江红狮环保股份有限公司