CN1733651A

CN1733651A - Sintering haydite preparation method

Info

Publication number: CN1733651A
Application number: CN 200510041886
Authority: CN
Inventors: 张殿平; 姬广庆; 康兴民
Original assignee: Lanzhou University of Technology
Current assignee: Lanzhou University of Technology
Priority date: 2005-03-25
Filing date: 2005-03-25
Publication date: 2006-02-15

Abstract

The preparation method for sintered ceramic aggregate with high strength and low density comprises, pretreating the raw material to extrude with vacuum extruder into solid hollow tube; cutting the tube by mechanism segments with length similar to its diameter, and sealing two ends; forming hollow irregular balls in pelletizer; finally, sintering to obtain the objective product. This invention has wide material source, simple technique and high product quality.

Description

The preparation method of sintering ceramsite

Technical field

The present invention relates to the production method in stupalith processing neck city, particularly a kind of sintering ceramsite.

Background technology

It is to utilize clay, shale or flyash etc. can burn bloated raw material to add water stirring, balling-up that tradition is made sintering-expanded haydite (following common name haydite), by rotary kiln at high temperature, utilization can burn expand raw material at high temperature the expansible characteristic through expanded and form the spheroid or the goalpost shape spheroid of hollow, be irregular inferior circle shape, subangular, be exactly haydite after the cooling more.The raw material of producing must be to burn bloated raw material, and this raw material at nature seldom, therefore need improve its expansion characteristics with additive, because clay, material performances such as shale vary, even a collection of material performance difference is also very big, additive not only increases cost but also be difficult to stable the adding, quality product is made a big impact, this method has also greatly been wasted land resources, and the clay of quite a few region arranged, shale etc. can not burn at all and expand or in the high temperature sintering post shrinkage, even adding that additive also can't expand makes haydite, this makes the manufacturing of haydite have the limitation on the raw material; The production process of haydite is at high temperature expanded and spheroid formation hollow on the one hand again, and energy consumption is higher, cost is high; Guarantee product performance and product size by material performance, technology is difficult to control, and in order to address this problem, burning is sieved after expanding, and what general particle diameter was big is haydite, and what particle diameter was little is pottery sand, and ratio is also uncontrollable.

Summary of the invention

The purpose of this invention is to provide that a kind of raw material sources are extensive, production technique is controlled easily, the preparation method of quality product height, sintering ceramsite with low cost.

The present invention is the preparation method of sintering ceramsite; at first starting material are carried out pre-treatment; to be extruded into closely knit hollow tube by vacuum-extruder high pressure under vacuum state through pretreated raw material; cut into the length approaching by cutting mechanism again with the hollow tube diameter; in working angles simultaneously with after the closed at both ends; enter the irregular spheroid that tablets press forms hollow, after the sintering vitrification forms sintering ceramsite.

Sintering ceramsite adopts coal gangue with material, perhaps poor soil, and perhaps river silt, perhaps coal dust, perhaps slag, perhaps flyash, perhaps coal gangue, perhaps above arbitrary two or more combination of materials, sintering forms.

Raw material sources of the present invention are extensive, and production technique is controlled easily, and quality product height, with low cost can be produced intensity greater than leca and the little high-strength sintered haydite of density.

Embodiment

The present invention is achieved through the following technical solutions:

Will be through pulverizing; raw material after the ageing is transported into transfer roller from former material shed or stockyard; useless for profit simultaneously; save energy; can be with coal dust; slag; flyash; industrial wastes such as coal gangue mix as interior fuel; deliver to forced stirrer by transfer roller and add the water stirring; send into vacuum-extruder high pressure under vacuum state through rubber conveyer and be extruded into closely knit hollow tube; cut into the length approaching by cutting mechanism again with the hollow tube diameter; in working angles with closed at both ends; enter the tablets press balling-up then; in order to prevent to cohere; can add dried clay simultaneously; fine sand; coal dust etc.; grain ball warp hopper evenly enters rotary kiln material mouth; enter the Rotating with Uniform of the grain ball of rotary kiln with rotary kiln; by kiln hood to the spiral rolling of kiln tail; in rolling process, the moisture of grain in the ball progressively raises with kiln temperature and evaporates, and water vapour is handled the back in company with flue gas in the kiln through kiln hood smoke extractor and soot processing device and arranged heavenwards by chimney.The grain ball is dry along with the evaporation of moisture, when being rolled to the rotary kiln end place, begins to carry out roasting with the kiln temperature rise, owing to added interior fuel, with spontaneous combustion behind the ignited fuel seldom, extra fuel is as auxiliary, adjustment heat.Temperature rises to 1050 ℃～1200 ℃ when entering the kiln tail, and the grain ball warp kiln tail discharge port after the roasting is discharged in the aggregate bin, is the sintering ceramsite goods after the cooling.

The sintering ceramsite clay, perhaps shale, perhaps coal gangue, perhaps poor soil, perhaps river silt, perhaps coal dust, perhaps slag, perhaps flyash, perhaps coal gangue, perhaps above arbitrary two or more combination of materials, sintering forms.

Claims

1, the preparation method of sintering ceramsite; at first starting material are carried out pre-treatment; it is characterized in that and to be extruded into closely knit hollow tube through pretreated raw material by vacuum-extruder high pressure under vacuum state; cut into the length approaching by cutting mechanism again with the hollow tube diameter; in working angles simultaneously with after the closed at both ends; enter the irregular spheroid that tablets press forms hollow, after the sintering vitrification forms sintering ceramsite.

2, the preparation method of sintering ceramsite according to claim 1, the sintering material adopts clay, and perhaps shale is characterized in that the sintering material adopts coal gangue, perhaps poor soil, perhaps river silt, perhaps coal dust, perhaps slag, perhaps flyash, perhaps coal gangue, perhaps above arbitrary two or more combination of materials, sintering forms.