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Method for producing inorganic filling material used for wood plastic material by titanium gypsum

A technology of wood-plastic materials and inorganic fillers, applied in the field of inorganic fillers, can solve the problems of narrow utilization range and difficulty in the utilization of titanium gypsum, and achieve the effects of reducing costs and improving hardness and strength

Inactive Publication Date: 2014-07-16
MAANSHAN HOYO MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a new utilization method of titanium gypsum in view of the current problems of difficult and narrow utilization of titanium gypsum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Take 1 liter of titanium gypsum slurry obtained by adding lime to titanium dioxide produced by sulfuric acid method, add a certain amount of calcium carbide slag under stirring conditions to adjust the slurry, measure the pH value with a pH meter, stop adding when the pH value reaches 8; Filter and dry the obtained filter cake at 400°C for 50 minutes to obtain the dried titanium gypsum; add the coupling agent to the dried titanium gypsum according to the mass ratio of 1:0.01, and mix evenly; the mixture obtained in the previous step Ball milling and passing through a 800-mesh sieve to obtain modified gypsum powder that can be used as an inorganic filler for wood-plastic materials.

Embodiment 2

[0013] Example 2: Take 1 liter of titanium gypsum slurry obtained by adding lime to titanium dioxide produced by sulfuric acid method, add a certain amount of calcium carbide slag under stirring conditions to adjust the slurry, measure the pH value with a pH meter, stop adding when the pH value reaches 8; Filter, and dry and dehydrate the obtained filter cake at 500°C for 30 minutes to obtain dried titanium gypsum; add coupling agent to the dried titanium gypsum according to the mass ratio of 1:0.03, and mix evenly; mix the mixture obtained in the previous step Ball milling and passing through a 800-mesh sieve to obtain modified gypsum powder that can be used as an inorganic filler for wood-plastic materials.

Embodiment 3

[0014] Example 3: Take 1 liter of titanium gypsum slurry obtained by adding lime to titanium dioxide produced by the sulfuric acid method, add a certain amount of calcium carbide slag or red mud to adjust the slurry under stirring conditions, measure the pH value with a pH meter, and stop adding when the pH value reaches 8.5; The slurry is filtered, and the obtained filter cake is dried and dehydrated at 450°C for 40 minutes to obtain the dried titanium gypsum; add the coupling agent to the dried titanium gypsum according to the mass ratio of 1:0.05, and mix evenly; The obtained mixture is ball-milled and passed through a 800-mesh sieve to obtain modified gypsum powder that can be used as an inorganic filler for wood-plastic materials.

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PUM

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Abstract

The invention provides a method for producing an inorganic filling material used for a wood plastic material by titanium gypsum, which belongs to the technical field of comprehensive utilization of solid waste. The method comprises the following steps: directly adding an alkalescence substance during a titanium dioxide production process through a sulfuric acid method, conversing the soluble salt in a titanium gypsum slurry to an insoluble substance, filtering, dehydrating through a high temperature drying process and simultaneously decomposing hydrophilic substances such as dihydrate gypsum, iron hydroxide, aluminium hydroxide in titanium gypsum to form hemihydrate gypsum, iron oxide and alumina with poor hydrophilcity, modifying the surface of the dried titanium gypsum by a coupling agent to increase the lipophilicity, and finally performing ball milling to obtain the modified gypsum powder with particle size less than 800 meshes. The inorganic filling material can obviously increase the hardness and strength of the wood plastic products, effectively reduces the raw material cost of the wood plastic product, and provides a novel effective approach for comprehensive utilization of titanium gypsum.

Description

Technical field [0001] The present invention is the field of comprehensive utilization of solid waste.Specifically involved in the use of titanium gypsum to prepare wooden plastic materials to produce inorganic fillers. Background technique [0002] The titanium gypsum residue is a by -product obtained from lime treatment of acidic wastewater in the titanium pink industry. Its main ingredient is calcium sulfate, which is greater than 70%. In addition, it also contains a certain percentage of iron hydroxide, iron sulfate and aluminum hydroxide.Waiting for ingredients.Each ton of titanium pink is produced in industrial sulfuric acid, six tons of titanium gypsum is produced.In 2011, the total output of my country's titanium pink powder was 1.812 million tons, and the annual emissions of titanium gypsum had exceeded 10 million tons.The stacking of titanium gypsum occupies a large amount of land resources, which also causes pollution to the water quality and air stacked, which serious...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K3/30C08L97/02C08L101/00
Inventor 俞海云闫勇向贤平
Owner MAANSHAN HOYO MATERIAL TECH CO LTD
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