CN1249289A

CN1249289A - Underwater static fracturing agent and its preparing process

Info

Publication number: CN1249289A
Application number: CN 99116548
Authority: CN
Inventors: 许永胜; 李红杰; 魏伴云
Original assignee: China University of Geosciences
Current assignee: China University of Geosciences
Priority date: 1999-07-19
Filing date: 1999-07-19
Publication date: 2000-04-05
Anticipated expiration: 2019-07-19
Also published as: CN100404478C

Abstract

An underwater static fracturing agent used to replace underwater explosion is prepared from calcium lime as main raw material (50-95 wt.%), FeCl3 (2.25-22.5 wt.%) and cement (2-25 wt.%) through mixing and high-temp. calcing. Its advantages are short cracking time, high expansion force, high fracturing effect and high safety. It can also be used as rock fracturing agent.

Description

Static crushing agent and preparation method thereof

The invention belongs to a static crushing agent, in particular to a crushing agent for performing static crushing under water.

In actual work, the situation that only static crushing can be adopted instead of the blasting method due to the limitation of environmental conditions is often encountered. When river channels, docks, ports, pile foundations and the like are excavated underwater, safety precaution measures need to be taken, and shock waves generated by explosive blasting are adopted to damage aquatic organisms and greatly damage the ecological environment. The main components of the static crushing agent used at present are CaO and H₂O undergoes the following chemical reaction: (ii) a The optimal water-cement ratio is H₂CaO 18: 56; if the proportion of water increases, the expansion pressure decreases sharply to lose the crushing capacity. When the static breaking agent is used underwater, the water-cement ratio required by the reaction of the static breaking agent cannot be maintained due to the existence of a large amount of water, and the static breaking agent stirred into a thin slurry state loses the breaking capacity along with the water drift. The common roll-shaped static crushing agent controls the water-cement ratio by utilizing the contact soaking time of the common roll-shaped static crushing agent and can lose the crushing capability in water or places with a large amount of water and cannot be applied under the water and water-rich conditions; the main reason is poor water resistance. Therefore, there is a need for a breaker that can be statically broken under water to meet the needs of underwater engineering.

The invention aims to provide a static crushing agent capable of performing underwater static crushing and a method for manufacturing the static crushing agent, which can increase the water resistance and the expansion pressure of the static crushing agent.

The invention is made by using calcium oxide (CaO) as main raw material, adding water-resisting agent and setting hardening agent, mixing and calcining at high temperature.

In order to complete the concept of the invention, the main raw material of the invention is quicklime (CaO), which is characterized in that: FeCl is also added into the material composition₃Cement; quicklime, FeCl₃Mixing with 50-95 wt%, 22.5-2.25 wt% and 25-2 wt% of cement, and calcining at 1200 deg.c.

In order to ensure better effect in the processing and manufacturing process, fluorite and CaCl can also be added into the material composition₂. Quicklime, FeCl₃Cement, fluorite, CaCl₂The weight proportion of the components is as follows: 50-95%, 22.5-2.25%, 25-2%, 14-0.1%, 15-0.5%. The calcination temperature can be controlled at 1300-1600 ℃ and the time can be controlled at 2-48 hours.

In order to improve the using effect and enhance the expansibility of the product, CaSO is added into the components of the product₄And a catalyst.

In the invention, the quicklime is an expansion source and reacts after meeting water to generate huge tension。FeCl₃Is a water repellent enhancing agent, FeCl₃The product of the invention has the function of controlling the water absorption speed when in use, thus ensuring the product of the invention to remain in water for the required time. The cement is a setting hardening agent, the cement has the setting hardening effect, the calcined and melted product is solidified and hardened, and the high-temperature calcination is used for sintering the product and increasing the volume weight.

In order to improve the using effect and enhance the expansion force of the product in use, a proper amount of CaSO can be added into the cement₄。

In order to lower the melting temperature and shorten the calcination time, a fluxing agent and a speed regulator can be added during calcination, fluorite is the fluxing agent, CaCl₂Is a speed regulator for regulating the calcining and melting speed. Fluorite is added, so that the flux effect is realized during calcination, the melting temperature can be controlled to be 1200-1600 ℃, and the melting time is shortened. CaCl₂The catalyst is a speed regulator, the calcining melting speed is regulated, and the calcining time is controlled to be 2-48 hours; and when the product is used, the hydration reaction speed of water and the product is controlled, so that the optimal effect is achieved.

The product of the invention forms a block-shaped consolidation body after being calcined at high temperature, and can be directly used after being simply crushed according to the requirement in the actual work.

The method is characterized in that quicklime is used as a main raw material, and an enhanced water repellent agent, a setting hardener, a fluxing agent and a speed regulator are added, so that the quicklime (CaO), the enhanced water repellent agent, the setting hardener, the fluxing agent and the speed regulator are crushed, mixed and calcined at high temperature to prepare the calcium-magnesium-calcium-zinc-calcium composite material.

The invention provides a static crushing agent used underwater. The problem of can only adopt the blasting and can not carry out static breakage under water at present is solved. The invention is provided withQuicklime is used as a main raw material, and an enhanced water repellent agent FeCl is added₃Cement as setting and hardening agent, fluorite as fluxing agent and CaCl as speed regulator₂(ii) a The product is prepared by melting the raw materials by a high-temperature calcination method, and the water resistance and the expansion pressure of the product are increased. Has the advantages of short cracking time, large expansive force, good crushing effect, safe use, convenient construction and operation and the likeThe cost is also low.

In order to obtain better crushing effect, the quick lime and FeCl adopted by the invention₃Cement + CaSO₄Fluorite, CaCl₂The weight proportion of the components is as follows: 50-95%, 22.5-2.25%, 25-2%, 14-0.1%, 15-0.5%. The temperature is controlled to be 1300-1600 ℃, and the calcination time is 2-48 hours.

According to the requirements, the invention forms quicklime and FeCl₃Mixing with cement at the following weight ratio of 1, 60%, 20% and 20%; 2. 70%, 15%; 3. 80%, 15% and 5%; 4. 85%, 10% and 5%; 5. 90%, 6% and 4%; 6. 95%, 3% and 2% by weight, and calcining at a high temperature of 1300-1600 ℃.

Fluorite and CaCl are added correspondingly₂Then quicklime and FeCl₃+ B, cement + CaSO₄Fluorite, CaCl₂The weight proportion of (A) can be 1, 60%, 15%, 5%; 2. 70%, 10%, 6%, 4%; 3. 80%, 10%, 5%, 3%, 2%; 4. 85%, 4%, 6%, 3% and 2%; 5. 90%, 4%, 5%, 0.5%; 6. 95%, 2%, 2.25%, 0.25% and 0.5%, and calcining at 1200-1600 deg.C for 2-48 h.

The invention is mainly used for static crushing of fragile materials such as underwater rocks and the like, and can also be used as a rock static crushing agent under the common conditions.

Claims

1. A static breaker and its preparation method, the principal ingredients are quicklime, its characteristic is: FeCl is also added into the material composition₃Cement; quicklime, FeCl₃Mixing the cement with 50-95 wt%, 22.5-2.25 wt% and 25-2 wt% of the mixture, and calcining at 1300-1600 deg.c.

2. A static disintegrator and its manufacturing method as claimed in claim 1,the method is characterized in that: the material composition can also comprise fluorite and CaCl₂。

3. A static crusher and a method for producing the same as claimed in claim 1 or 2, wherein: quicklime, FeCl₃Cement, fluorite, CaCl₂The weight proportion of the components is as follows: 50-95%, 22.5-2.25%, 25-2%, 14-0.1%, 15-0.5%; the calcination time is as follows: 2 to 48 hours

4. A static crusher and a method of manufacturing the same as claimed in claim 3, wherein: adding proper CaSO into cement₄。