Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing ultra-thin highly-waterproof type ceramsite by taking sediments and chromium slag as raw materials

A waterproof and chromium slag technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, clay products, etc., can solve the problems of general water absorption and ceramsite not reaching the ultra-light standard, and achieve excellent properties, The effect of high economic benefit and environmental benefit

Active Publication Date: 2013-12-25
山东兴硕环保科技有限公司
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the treatment and disposal of dredged sediment has always been a major problem in the environmental protection industry.
CaCO in chromium slag 3 It is also a good expansion agent in the production of ceramsite. Publication No. CN1951860 introduces a preparation method of light ceramsite with chromium slag and clay as the main raw materials, but the ceramsite prepared by it does not reach the ultra-light standard, and its water absorption is general.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Dehydrate and dry the bottom mud to keep the water content below 40%; grind and sieve the chromium slag to below 80 mesh; crush and sieve the waste glass to below 100 mesh; at the same time, dry or sun-dry the biomass, Crush and sieve to below 40 meshes; mix bottom sludge, chromium residue, biomass, conditioner and rotary kiln ash, and add proportions by weight: 50% of dried bottom sludge, 20% of chromium residue, and 10% of biomass %, 20% of waste glass, mixed and granulated by rolling to make raw meal balls; send the raw meal balls into the rotary kiln, control the excess air coefficient below 1, reduce and roast at 1150C for 45min, cool to room temperature and make Ultra-light and highly waterproof ceramsite. Bulk density 450kg / m 3 , water absorption 1.9%.

example 2

[0022] Dehydrate and dry the bottom mud to keep the water content below 40%; grind and sieve the chromium slag to below 80 mesh; crush and sieve the waste glass to below 100 mesh; at the same time, dry or sun-dry the biomass, Crush and sieve to below 40 meshes; mix bottom sludge, chromium residue, biomass, conditioner and rotary kiln ash, and add proportion by weight: 70% of dried bottom sludge, 10% of chromium residue, and 5% of biomass %, 15% of waste glass, after mixing, roll and granulate to make raw meal balls; send the raw meal balls into the rotary kiln, control the excess air coefficient below 1, reduce and roast at 1150C for 45min, and cool to room temperature. Ultra-light and highly waterproof ceramsite. Bulk density 330kg / m 3 , water absorption 1.2%.

[0023] The invention effectively utilizes dredged bottom mud piled up in large quantities in rivers, lakes and oceans, solves the hazard of hazardous waste chromium slag, and at the same time makes building material...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing an ultra-thin highly-waterproof type ceramsite by taking sediments and chromium slag as raw materials. The method comprises the following steps of: dewatering contaminated sediments; then, mixing the sediments with the chromium slag, dried biomass and glass to a scale; performing extrusion forming through a granulating machine; screening to obtain a pellet; performing high-temperature roasting on the pellet; and cooling to obtain the ceramsite. The method has the beneficial effects that the raw materials are solid waste respectively, and thus, the goal of treatment of wastes with processes of wastes against one another is achieved. The ceramsite prepared by the method is ultra-thin and is highly waterproof and is extremely suitable for serving as an energy-saving material. In the implementation process of the method, the harmlessness of the chromium slag is realized, i.e. hexavalent chromium is reduced into low-toxicity trivalent chromium by the utilization of the biomass and reducing atmosphere, and meanwhile, heavy-metal chromium is sealed in the crystal lattice of the ceramsite by high temperature, and thereby, the harmlessness of the chromium slag is realized. According to the method, a great number of dredged sediments piled up in rivers, lakes and oceans are effectively utilized, so that the harm of the chromium slag is removed, and meanwhile, the chromium slag is made into a building material with excellent properties, and thereby, the ultra-thin highly-waterproof type ceramsite has extremely high economic benefit and environmental benefit.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for preparing ultra-light and highly waterproof ceramsite by using bottom mud and chromium slag as raw materials. Background technique [0002] For a long time, the irregular discharge of industrial wastewater has formed a large number of sewage rivers and sewage reservoirs in urban industrial areas and suburban counties of some large cities. After a long period of concentration and precipitation, a large amount of heavy metals and toxic substances have accumulated in the sediment and dam soil In the middle, the self-purification function is completely lost. In recent years, with the improvement of sewage treatment technology and facilities in my country, the water quality of natural water systems has been greatly improved. However, when the water quality is good, the release of pollutants adsorbed in the sediment will become the main reason affecting the water ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C04B33/00C04B33/132
CPCY02P40/60Y02W10/37
Inventor 张大磊李依韩李红卫吕谋孙英杰
Owner 山东兴硕环保科技有限公司